diff --git a/testhal/STM32/multi/RTC/.cproject b/testhal/STM32/multi/RTC/.cproject
index 68a822007..f3b917a6e 100644
--- a/testhal/STM32/multi/RTC/.cproject
+++ b/testhal/STM32/multi/RTC/.cproject
@@ -299,31 +299,32 @@
 		</configuration>
 		<configuration configurationName="Build for STM32L476-Discovery"/>
 	</storageModule>
+	<storageModule moduleId="org.eclipse.cdt.make.core.buildtargets"/>
 	<storageModule moduleId="scannerConfiguration">
 		<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
 		<scannerConfigBuildInfo instanceId="0.365230168.523175374.896040759">
-			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerFileProfile"/>
+			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 		<scannerConfigBuildInfo instanceId="0.365230168.523175374">
 			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 		<scannerConfigBuildInfo instanceId="0.365230168.523175374.1388690690">
-			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerFileProfile"/>
+			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 		<scannerConfigBuildInfo instanceId="0.365230168.523175374.896040759.537395379.1909260258.978376113">
-			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerFileProfile"/>
+			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 		<scannerConfigBuildInfo instanceId="0.365230168.523175374.896040759.537395379">
-			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerFileProfile"/>
+			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 		<scannerConfigBuildInfo instanceId="0.365230168">
 			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 		<scannerConfigBuildInfo instanceId="0.365230168.523175374.896040759.537395379.1909260258">
-			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerFileProfile"/>
+			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 		<scannerConfigBuildInfo instanceId="0.365230168.523175374.763979647">
-			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerFileProfile"/>
+			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 	</storageModule>
-</cproject>
+</cproject>
\ No newline at end of file
diff --git a/testhal/STM32/multi/RTC/make/stm32f746_discovery.make b/testhal/STM32/multi/RTC/make/stm32f746_discovery.make
index 914b666ae..e164373b7 100644
--- a/testhal/STM32/multi/RTC/make/stm32f746_discovery.make
+++ b/testhal/STM32/multi/RTC/make/stm32f746_discovery.make
@@ -5,7 +5,7 @@
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-  USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16
+  USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
 endif
 
 # C specific options here (added to USE_OPT).
@@ -18,7 +18,7 @@ ifeq ($(USE_CPPOPT),)
   USE_CPPOPT = -fno-rtti
 endif
 
-# Enable this if you want the linker to remove unused code and data
+# Enable this if you want the linker to remove unused code and data.
 ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
@@ -28,16 +28,11 @@ ifeq ($(USE_LDOPT),)
   USE_LDOPT = 
 endif
 
-# Enable this if you want link time optimizations (LTO)
+# Enable this if you want link time optimizations (LTO).
 ifeq ($(USE_LTO),)
   USE_LTO = yes
 endif
 
-# If enabled, this option allows to compile the application in THUMB mode.
-ifeq ($(USE_THUMB),)
-  USE_THUMB = yes
-endif
-
 # Enable this if you want to see the full log while compiling.
 ifeq ($(USE_VERBOSE_COMPILE),)
   USE_VERBOSE_COMPILE = no
@@ -76,7 +71,7 @@ endif
 
 # FPU-related options.
 ifeq ($(USE_FPU_OPT),)
-  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv5-sp-d16 -fsingle-precision-constant
+  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv5-sp-d16
 endif
 
 #
@@ -84,13 +79,16 @@ endif
 ##############################################################################
 
 ##############################################################################
-# Project, sources and paths
+# Project, target, sources and paths
 #
 
 # Define project name here
 PROJECT = ch
 
-# Imported source files and paths
+# Target settings.
+MCU  = cortex-m7
+
+# Imported source files and paths.
 CHIBIOS  := ../../../..
 CONFDIR  := ./cfg/stm32f746_discovery
 BUILDDIR := ./build/stm32f746_discovery
@@ -131,34 +129,23 @@ CSRC = $(ALLCSRC) \
 # setting.
 CPPSRC = $(ALLCPPSRC)
 
-# C sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACSRC =
-
-# C++ sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACPPSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCPPSRC =
-
-# List ASM source files here
+# List ASM source files here.
 ASMSRC = $(ALLASMSRC)
+
+# List ASM with preprocessor source files here.
 ASMXSRC = $(ALLXASMSRC)
 
-INCDIR = $(ALLINC) $(TESTINC) $(CONFDIR)
+# Inclusion directories.
+INCDIR = $(CONFDIR) $(ALLINC) $(TESTINC)
+
+# Define C warning options here.
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
+
+# Define C++ warning options here.
+CPPWARN = -Wall -Wextra -Wundef
 
 #
-# Project, sources and paths
+# Project, target, sources and paths
 ##############################################################################
 
 ##############################################################################
@@ -185,43 +172,21 @@ ULIBS =
 ##############################################################################
 
 ##############################################################################
-# Compiler settings
+# Common rules
 #
 
-MCU  = cortex-m7
-
-#TRGT = arm-elf-
-TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
-# Enable loading with g++ only if you need C++ runtime support.
-# NOTE: You can use C++ even without C++ support if you are careful. C++
-#       runtime support makes code size explode.
-LD   = $(TRGT)gcc
-#LD   = $(TRGT)g++
-CP   = $(TRGT)objcopy
-AS   = $(TRGT)gcc -x assembler-with-cpp
-AR   = $(TRGT)ar
-OD   = $(TRGT)objdump
-SZ   = $(TRGT)size
-HEX  = $(CP) -O ihex
-BIN  = $(CP) -O binary
-
-# ARM-specific options here
-AOPT =
-
-# THUMB-specific options here
-TOPT = -mthumb -DTHUMB
-
-# Define C warning options here
-CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
-
-# Define C++ warning options here
-CPPWARN = -Wall -Wextra -Wundef
-
-#
-# Compiler settings
-##############################################################################
-
 RULESPATH = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk
+include $(RULESPATH)/arm-none-eabi.mk
 include $(RULESPATH)/rules.mk
+
+#
+# Common rules
+##############################################################################
+
+##############################################################################
+# Custom rules
+#
+
+#
+# Custom rules
+##############################################################################
diff --git a/testhal/STM32/multi/SDMMC-FATFS/.cproject b/testhal/STM32/multi/SDMMC-FATFS/.cproject
index 89d8904b7..a41df3906 100644
--- a/testhal/STM32/multi/SDMMC-FATFS/.cproject
+++ b/testhal/STM32/multi/SDMMC-FATFS/.cproject
@@ -92,4 +92,4 @@
 			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 	</storageModule>
-</cproject>
+</cproject>
\ No newline at end of file
diff --git a/testhal/STM32/multi/SDMMC/.cproject b/testhal/STM32/multi/SDMMC/.cproject
index e69a1204a..10ea3b3a9 100644
--- a/testhal/STM32/multi/SDMMC/.cproject
+++ b/testhal/STM32/multi/SDMMC/.cproject
@@ -81,14 +81,14 @@
 		</configuration>
 		<configuration configurationName="Build for STM32L476-Discovery"/>
 	</storageModule>
+	<storageModule moduleId="org.eclipse.cdt.make.core.buildtargets"/>
 	<storageModule moduleId="scannerConfiguration">
 		<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
-		<scannerConfigBuildInfo instanceId="0.365230168">
-			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
-		</scannerConfigBuildInfo>
 		<scannerConfigBuildInfo instanceId="0.365230168.523175374">
 			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
+		<scannerConfigBuildInfo instanceId="0.365230168">
+			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
+		</scannerConfigBuildInfo>
 	</storageModule>
-	<storageModule moduleId="org.eclipse.cdt.make.core.buildtargets"/>
-</cproject>
+</cproject>
\ No newline at end of file
diff --git a/testhal/STM32/multi/TRNG/.cproject b/testhal/STM32/multi/TRNG/.cproject
index bcf922c70..ebb61694b 100644
--- a/testhal/STM32/multi/TRNG/.cproject
+++ b/testhal/STM32/multi/TRNG/.cproject
@@ -114,6 +114,7 @@
 		</configuration>
 		<configuration configurationName="Build for STM32L476-Discovery"/>
 	</storageModule>
+	<storageModule moduleId="org.eclipse.cdt.make.core.buildtargets"/>
 	<storageModule moduleId="scannerConfiguration">
 		<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
 		<scannerConfigBuildInfo instanceId="0.365230168">
@@ -122,5 +123,8 @@
 		<scannerConfigBuildInfo instanceId="0.365230168.523175374">
 			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
+		<scannerConfigBuildInfo instanceId="0.365230168.523175374.763979647">
+			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
+		</scannerConfigBuildInfo>
 	</storageModule>
-</cproject>
+</cproject>
\ No newline at end of file
diff --git a/testhal/STM32/multi/UART/.cproject b/testhal/STM32/multi/UART/.cproject
index 53ffecc39..a1e921eb9 100644
--- a/testhal/STM32/multi/UART/.cproject
+++ b/testhal/STM32/multi/UART/.cproject
@@ -225,4 +225,4 @@
 		</scannerConfigBuildInfo>
 	</storageModule>
 	<storageModule moduleId="org.eclipse.cdt.make.core.buildtargets"/>
-</cproject>
+</cproject>
\ No newline at end of file
diff --git a/testhal/STM32/multi/UART/make/stm32f091_nucleo64.make b/testhal/STM32/multi/UART/make/stm32f091_nucleo64.make
index 1deb0a881..c235a6043 100644
--- a/testhal/STM32/multi/UART/make/stm32f091_nucleo64.make
+++ b/testhal/STM32/multi/UART/make/stm32f091_nucleo64.make
@@ -5,12 +5,12 @@
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-  USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16
+  USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
 endif
 
 # C specific options here (added to USE_OPT).
 ifeq ($(USE_COPT),)
-  USE_COPT = 
+  USE_COPT =
 endif
 
 # C++ specific options here (added to USE_OPT).
@@ -18,26 +18,21 @@ ifeq ($(USE_CPPOPT),)
   USE_CPPOPT = -fno-rtti
 endif
 
-# Enable this if you want the linker to remove unused code and data
+# Enable this if you want the linker to remove unused code and data.
 ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
 
 # Linker extra options here.
 ifeq ($(USE_LDOPT),)
-  USE_LDOPT = 
+  USE_LDOPT =
 endif
 
-# Enable this if you want link time optimizations (LTO)
+# Enable this if you want link time optimizations (LTO).
 ifeq ($(USE_LTO),)
   USE_LTO = yes
 endif
 
-# If enabled, this option allows to compile the application in THUMB mode.
-ifeq ($(USE_THUMB),)
-  USE_THUMB = yes
-endif
-
 # Enable this if you want to see the full log while compiling.
 ifeq ($(USE_VERBOSE_COMPILE),)
   USE_VERBOSE_COMPILE = no
@@ -69,18 +64,31 @@ ifeq ($(USE_EXCEPTIONS_STACKSIZE),)
   USE_EXCEPTIONS_STACKSIZE = 0x200
 endif
 
+# Enables the use of FPU (no, softfp, hard).
+ifeq ($(USE_FPU),)
+  USE_FPU = no
+endif
+
+# FPU-related options.
+ifeq ($(USE_FPU_OPT),)
+  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16
+endif
+
 #
 # Architecture or project specific options
 ##############################################################################
 
 ##############################################################################
-# Project, sources and paths
+# Project, target, sources and paths
 #
 
 # Define project name here
 PROJECT = ch
 
-# Imported source files and paths
+# Target settings.
+MCU  = cortex-m0
+
+# Imported source files and paths.
 CHIBIOS  := ../../../..
 CONFDIR  := ./cfg/stm32f091_nucleo64
 BUILDDIR := ./build/stm32f091_nucleo64
@@ -119,34 +127,23 @@ CSRC = $(ALLCSRC) \
 # setting.
 CPPSRC = $(ALLCPPSRC)
 
-# C sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACSRC =
-
-# C++ sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACPPSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCPPSRC =
-
-# List ASM source files here
+# List ASM source files here.
 ASMSRC = $(ALLASMSRC)
+
+# List ASM with preprocessor source files here.
 ASMXSRC = $(ALLXASMSRC)
 
-INCDIR = $(ALLINC) $(TESTINC) $(CONFDIR)
+# Inclusion directories.
+INCDIR = $(CONFDIR) $(ALLINC)
+
+# Define C warning options here.
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
+
+# Define C++ warning options here.
+CPPWARN = -Wall -Wextra -Wundef
 
 #
-# Project, sources and paths
+# Project, target, sources and paths
 ##############################################################################
 
 ##############################################################################
@@ -173,43 +170,21 @@ ULIBS =
 ##############################################################################
 
 ##############################################################################
-# Compiler settings
+# Common rules
 #
 
-MCU  = cortex-m0
-
-#TRGT = arm-elf-
-TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
-# Enable loading with g++ only if you need C++ runtime support.
-# NOTE: You can use C++ even without C++ support if you are careful. C++
-#       runtime support makes code size explode.
-LD   = $(TRGT)gcc
-#LD   = $(TRGT)g++
-CP   = $(TRGT)objcopy
-AS   = $(TRGT)gcc -x assembler-with-cpp
-AR   = $(TRGT)ar
-OD   = $(TRGT)objdump
-SZ   = $(TRGT)size
-HEX  = $(CP) -O ihex
-BIN  = $(CP) -O binary
-
-# ARM-specific options here
-AOPT =
-
-# THUMB-specific options here
-TOPT = -mthumb -DTHUMB
-
-# Define C warning options here
-CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
-
-# Define C++ warning options here
-CPPWARN = -Wall -Wextra -Wundef
-
-#
-# Compiler settings
-##############################################################################
-
 RULESPATH = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk
+include $(RULESPATH)/arm-none-eabi.mk
 include $(RULESPATH)/rules.mk
+
+#
+# Common rules
+##############################################################################
+
+##############################################################################
+# Custom rules
+#
+
+#
+# Custom rules
+##############################################################################
diff --git a/testhal/STM32/multi/UART/make/stm32f303_discovery.make b/testhal/STM32/multi/UART/make/stm32f303_discovery.make
index 5faebe0ec..da850f40c 100644
--- a/testhal/STM32/multi/UART/make/stm32f303_discovery.make
+++ b/testhal/STM32/multi/UART/make/stm32f303_discovery.make
@@ -5,12 +5,12 @@
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-  USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16
+  USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
 endif
 
 # C specific options here (added to USE_OPT).
 ifeq ($(USE_COPT),)
-  USE_COPT = 
+  USE_COPT =
 endif
 
 # C++ specific options here (added to USE_OPT).
@@ -18,26 +18,21 @@ ifeq ($(USE_CPPOPT),)
   USE_CPPOPT = -fno-rtti
 endif
 
-# Enable this if you want the linker to remove unused code and data
+# Enable this if you want the linker to remove unused code and data.
 ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
 
 # Linker extra options here.
 ifeq ($(USE_LDOPT),)
-  USE_LDOPT = 
+  USE_LDOPT =
 endif
 
-# Enable this if you want link time optimizations (LTO)
+# Enable this if you want link time optimizations (LTO).
 ifeq ($(USE_LTO),)
   USE_LTO = yes
 endif
 
-# If enabled, this option allows to compile the application in THUMB mode.
-ifeq ($(USE_THUMB),)
-  USE_THUMB = yes
-endif
-
 # Enable this if you want to see the full log while compiling.
 ifeq ($(USE_VERBOSE_COMPILE),)
   USE_VERBOSE_COMPILE = no
@@ -76,7 +71,7 @@ endif
 
 # FPU-related options.
 ifeq ($(USE_FPU_OPT),)
-  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16 -fsingle-precision-constant
+  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16
 endif
 
 #
@@ -84,13 +79,16 @@ endif
 ##############################################################################
 
 ##############################################################################
-# Project, sources and paths
+# Project, target, sources and paths
 #
 
 # Define project name here
 PROJECT = ch
 
-# Imported source files and paths
+# Target settings.
+MCU  = cortex-m4
+
+# Imported source files and paths.
 CHIBIOS  := ../../../..
 CONFDIR  := ./cfg/stm32f303_discovery
 BUILDDIR := ./build/stm32f303_discovery
@@ -129,34 +127,23 @@ CSRC = $(ALLCSRC) \
 # setting.
 CPPSRC = $(ALLCPPSRC)
 
-# C sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACSRC =
-
-# C++ sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACPPSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCPPSRC =
-
-# List ASM source files here
+# List ASM source files here.
 ASMSRC = $(ALLASMSRC)
+
+# List ASM with preprocessor source files here.
 ASMXSRC = $(ALLXASMSRC)
 
-INCDIR = $(ALLINC) $(TESTINC) $(CONFDIR)
+# Inclusion directories.
+INCDIR = $(CONFDIR) $(ALLINC)
+
+# Define C warning options here.
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
+
+# Define C++ warning options here.
+CPPWARN = -Wall -Wextra -Wundef
 
 #
-# Project, sources and paths
+# Project, target, sources and paths
 ##############################################################################
 
 ##############################################################################
@@ -183,43 +170,21 @@ ULIBS =
 ##############################################################################
 
 ##############################################################################
-# Compiler settings
+# Common rules
 #
 
-MCU  = cortex-m4
-
-#TRGT = arm-elf-
-TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
-# Enable loading with g++ only if you need C++ runtime support.
-# NOTE: You can use C++ even without C++ support if you are careful. C++
-#       runtime support makes code size explode.
-LD   = $(TRGT)gcc
-#LD   = $(TRGT)g++
-CP   = $(TRGT)objcopy
-AS   = $(TRGT)gcc -x assembler-with-cpp
-AR   = $(TRGT)ar
-OD   = $(TRGT)objdump
-SZ   = $(TRGT)size
-HEX  = $(CP) -O ihex
-BIN  = $(CP) -O binary
-
-# ARM-specific options here
-AOPT =
-
-# THUMB-specific options here
-TOPT = -mthumb -DTHUMB
-
-# Define C warning options here
-CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
-
-# Define C++ warning options here
-CPPWARN = -Wall -Wextra -Wundef
-
-#
-# Compiler settings
-##############################################################################
-
 RULESPATH = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk
+include $(RULESPATH)/arm-none-eabi.mk
 include $(RULESPATH)/rules.mk
+
+#
+# Common rules
+##############################################################################
+
+##############################################################################
+# Custom rules
+#
+
+#
+# Custom rules
+##############################################################################
diff --git a/testhal/STM32/multi/UART/make/stm32f407_discovery.make b/testhal/STM32/multi/UART/make/stm32f407_discovery.make
index 4408a9e9e..b0bd7cb31 100644
--- a/testhal/STM32/multi/UART/make/stm32f407_discovery.make
+++ b/testhal/STM32/multi/UART/make/stm32f407_discovery.make
@@ -5,12 +5,12 @@
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-  USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16
+  USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
 endif
 
 # C specific options here (added to USE_OPT).
 ifeq ($(USE_COPT),)
-  USE_COPT = 
+  USE_COPT =
 endif
 
 # C++ specific options here (added to USE_OPT).
@@ -18,26 +18,21 @@ ifeq ($(USE_CPPOPT),)
   USE_CPPOPT = -fno-rtti
 endif
 
-# Enable this if you want the linker to remove unused code and data
+# Enable this if you want the linker to remove unused code and data.
 ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
 
 # Linker extra options here.
 ifeq ($(USE_LDOPT),)
-  USE_LDOPT = 
+  USE_LDOPT =
 endif
 
-# Enable this if you want link time optimizations (LTO)
+# Enable this if you want link time optimizations (LTO).
 ifeq ($(USE_LTO),)
   USE_LTO = yes
 endif
 
-# If enabled, this option allows to compile the application in THUMB mode.
-ifeq ($(USE_THUMB),)
-  USE_THUMB = yes
-endif
-
 # Enable this if you want to see the full log while compiling.
 ifeq ($(USE_VERBOSE_COMPILE),)
   USE_VERBOSE_COMPILE = no
@@ -76,7 +71,7 @@ endif
 
 # FPU-related options.
 ifeq ($(USE_FPU_OPT),)
-  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16 -fsingle-precision-constant
+  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16
 endif
 
 #
@@ -84,13 +79,16 @@ endif
 ##############################################################################
 
 ##############################################################################
-# Project, sources and paths
+# Project, target, sources and paths
 #
 
 # Define project name here
 PROJECT = ch
 
-# Imported source files and paths
+# Target settings.
+MCU  = cortex-m4
+
+# Imported source files and paths.
 CHIBIOS  := ../../../..
 CONFDIR  := ./cfg/stm32f407_discovery
 BUILDDIR := ./build/stm32f407_discovery
@@ -111,11 +109,9 @@ include $(CHIBIOS)/os/common/ports/ARMv7-M/compilers/GCC/mk/port.mk
 # Auto-build files in ./source recursively.
 include $(CHIBIOS)/tools/mk/autobuild.mk
 # Other files (optional).
-include $(CHIBIOS)/os/test/test.mk
-include $(CHIBIOS)/test/rt/rt_test.mk
-include $(CHIBIOS)/test/oslib/oslib_test.mk
-include $(CHIBIOS)/os/hal/lib/streams/streams.mk
-include $(CHIBIOS)/os/various/shell/shell.mk
+#include $(CHIBIOS)/os/test/test.mk
+#include $(CHIBIOS)/test/rt/rt_test.mk
+#include $(CHIBIOS)/test/oslib/oslib_test.mk
 
 # Define linker script file here
 LDSCRIPT= $(STARTUPLD)/STM32F407xG.ld
@@ -131,34 +127,23 @@ CSRC = $(ALLCSRC) \
 # setting.
 CPPSRC = $(ALLCPPSRC)
 
-# C sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACSRC =
-
-# C++ sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACPPSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCPPSRC =
-
-# List ASM source files here
+# List ASM source files here.
 ASMSRC = $(ALLASMSRC)
+
+# List ASM with preprocessor source files here.
 ASMXSRC = $(ALLXASMSRC)
 
-INCDIR = $(ALLINC) $(TESTINC) $(CONFDIR)
+# Inclusion directories.
+INCDIR = $(CONFDIR) $(ALLINC)
+
+# Define C warning options here.
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
+
+# Define C++ warning options here.
+CPPWARN = -Wall -Wextra -Wundef
 
 #
-# Project, sources and paths
+# Project, target, sources and paths
 ##############################################################################
 
 ##############################################################################
@@ -185,43 +170,21 @@ ULIBS =
 ##############################################################################
 
 ##############################################################################
-# Compiler settings
+# Common rules
 #
 
-MCU  = cortex-m4
-
-#TRGT = arm-elf-
-TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
-# Enable loading with g++ only if you need C++ runtime support.
-# NOTE: You can use C++ even without C++ support if you are careful. C++
-#       runtime support makes code size explode.
-LD   = $(TRGT)gcc
-#LD   = $(TRGT)g++
-CP   = $(TRGT)objcopy
-AS   = $(TRGT)gcc -x assembler-with-cpp
-AR   = $(TRGT)ar
-OD   = $(TRGT)objdump
-SZ   = $(TRGT)size
-HEX  = $(CP) -O ihex
-BIN  = $(CP) -O binary
-
-# ARM-specific options here
-AOPT =
-
-# THUMB-specific options here
-TOPT = -mthumb -DTHUMB
-
-# Define C warning options here
-CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
-
-# Define C++ warning options here
-CPPWARN = -Wall -Wextra -Wundef
-
-#
-# Compiler settings
-##############################################################################
-
 RULESPATH = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk
+include $(RULESPATH)/arm-none-eabi.mk
 include $(RULESPATH)/rules.mk
+
+#
+# Common rules
+##############################################################################
+
+##############################################################################
+# Custom rules
+#
+
+#
+# Custom rules
+##############################################################################
diff --git a/testhal/STM32/multi/UART/make/stm32f746_discovery.make b/testhal/STM32/multi/UART/make/stm32f746_discovery.make
index 4deec1248..418171b68 100644
--- a/testhal/STM32/multi/UART/make/stm32f746_discovery.make
+++ b/testhal/STM32/multi/UART/make/stm32f746_discovery.make
@@ -5,12 +5,12 @@
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-  USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16
+  USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
 endif
 
 # C specific options here (added to USE_OPT).
 ifeq ($(USE_COPT),)
-  USE_COPT = 
+  USE_COPT =
 endif
 
 # C++ specific options here (added to USE_OPT).
@@ -18,26 +18,21 @@ ifeq ($(USE_CPPOPT),)
   USE_CPPOPT = -fno-rtti
 endif
 
-# Enable this if you want the linker to remove unused code and data
+# Enable this if you want the linker to remove unused code and data.
 ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
 
 # Linker extra options here.
 ifeq ($(USE_LDOPT),)
-  USE_LDOPT = 
+  USE_LDOPT =
 endif
 
-# Enable this if you want link time optimizations (LTO)
+# Enable this if you want link time optimizations (LTO).
 ifeq ($(USE_LTO),)
   USE_LTO = yes
 endif
 
-# If enabled, this option allows to compile the application in THUMB mode.
-ifeq ($(USE_THUMB),)
-  USE_THUMB = yes
-endif
-
 # Enable this if you want to see the full log while compiling.
 ifeq ($(USE_VERBOSE_COMPILE),)
   USE_VERBOSE_COMPILE = no
@@ -76,7 +71,7 @@ endif
 
 # FPU-related options.
 ifeq ($(USE_FPU_OPT),)
-  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv5-sp-d16 -fsingle-precision-constant
+  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16
 endif
 
 #
@@ -84,13 +79,16 @@ endif
 ##############################################################################
 
 ##############################################################################
-# Project, sources and paths
+# Project, target, sources and paths
 #
 
 # Define project name here
 PROJECT = ch
 
-# Imported source files and paths
+# Target settings.
+MCU  = cortex-m7
+
+# Imported source files and paths.
 CHIBIOS  := ../../../..
 CONFDIR  := ./cfg/stm32f746_discovery
 BUILDDIR := ./build/stm32f746_discovery
@@ -129,34 +127,23 @@ CSRC = $(ALLCSRC) \
 # setting.
 CPPSRC = $(ALLCPPSRC)
 
-# C sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACSRC =
-
-# C++ sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACPPSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCPPSRC =
-
-# List ASM source files here
+# List ASM source files here.
 ASMSRC = $(ALLASMSRC)
+
+# List ASM with preprocessor source files here.
 ASMXSRC = $(ALLXASMSRC)
 
-INCDIR = $(ALLINC) $(TESTINC) $(CONFDIR)
+# Inclusion directories.
+INCDIR = $(CONFDIR) $(ALLINC)
+
+# Define C warning options here.
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
+
+# Define C++ warning options here.
+CPPWARN = -Wall -Wextra -Wundef
 
 #
-# Project, sources and paths
+# Project, target, sources and paths
 ##############################################################################
 
 ##############################################################################
@@ -183,43 +170,21 @@ ULIBS =
 ##############################################################################
 
 ##############################################################################
-# Compiler settings
+# Common rules
 #
 
-MCU  = cortex-m7
-
-#TRGT = arm-elf-
-TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
-# Enable loading with g++ only if you need C++ runtime support.
-# NOTE: You can use C++ even without C++ support if you are careful. C++
-#       runtime support makes code size explode.
-LD   = $(TRGT)gcc
-#LD   = $(TRGT)g++
-CP   = $(TRGT)objcopy
-AS   = $(TRGT)gcc -x assembler-with-cpp
-AR   = $(TRGT)ar
-OD   = $(TRGT)objdump
-SZ   = $(TRGT)size
-HEX  = $(CP) -O ihex
-BIN  = $(CP) -O binary
-
-# ARM-specific options here
-AOPT =
-
-# THUMB-specific options here
-TOPT = -mthumb -DTHUMB
-
-# Define C warning options here
-CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
-
-# Define C++ warning options here
-CPPWARN = -Wall -Wextra -Wundef
-
-#
-# Compiler settings
-##############################################################################
-
 RULESPATH = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk
+include $(RULESPATH)/arm-none-eabi.mk
 include $(RULESPATH)/rules.mk
+
+#
+# Common rules
+##############################################################################
+
+##############################################################################
+# Custom rules
+#
+
+#
+# Custom rules
+##############################################################################
diff --git a/testhal/STM32/multi/USB_CDC/.cproject b/testhal/STM32/multi/USB_CDC/.cproject
index d6276ca45..247dfd984 100644
--- a/testhal/STM32/multi/USB_CDC/.cproject
+++ b/testhal/STM32/multi/USB_CDC/.cproject
@@ -235,11 +235,6 @@
 							</tool>
 						</toolChain>
 					</folderInfo>
-					<fileInfo id="0.1093754934.1746620542.582861461.907517539" name="main.c" rcbsApplicability="disable" resourcePath="main.c" toolsToInvoke="org.eclipse.cdt.build.core.settings.holder.137597167.2058856355">
-						<tool id="org.eclipse.cdt.build.core.settings.holder.137597167.2058856355" name="GNU C" superClass="org.eclipse.cdt.build.core.settings.holder.581585405">
-							<inputType id="org.eclipse.cdt.build.core.settings.holder.inType.372596594" languageId="org.eclipse.cdt.core.gcc" languageName="GNU C" sourceContentType="org.eclipse.cdt.core.cSource,org.eclipse.cdt.core.cHeader" superClass="org.eclipse.cdt.build.core.settings.holder.inType"/>
-						</tool>
-					</fileInfo>
 				</configuration>
 			</storageModule>
 			<storageModule moduleId="org.eclipse.cdt.core.externalSettings"/>
@@ -350,7 +345,7 @@
 			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 		<scannerConfigBuildInfo instanceId="0.1093754934.1746620542.582861461.1867318931">
-			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.managedbuilder.core.GCCWinManagedMakePerProjectProfileCPP"/>
+			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 			<profile id="org.eclipse.cdt.managedbuilder.core.GCCWinManagedMakePerProjectProfileCPP">
 				<buildOutputProvider>
 					<openAction enabled="true" filePath=""/>
diff --git a/testhal/STM32/multi/USB_CDC/make/stm32f303_discovery.make b/testhal/STM32/multi/USB_CDC/make/stm32f303_discovery.make
index 11caac1fd..1180adb53 100644
--- a/testhal/STM32/multi/USB_CDC/make/stm32f303_discovery.make
+++ b/testhal/STM32/multi/USB_CDC/make/stm32f303_discovery.make
@@ -18,7 +18,7 @@ ifeq ($(USE_CPPOPT),)
   USE_CPPOPT = -fno-rtti
 endif
 
-# Enable this if you want the linker to remove unused code and data
+# Enable this if you want the linker to remove unused code and data.
 ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
@@ -28,16 +28,11 @@ ifeq ($(USE_LDOPT),)
   USE_LDOPT = 
 endif
 
-# Enable this if you want link time optimizations (LTO)
+# Enable this if you want link time optimizations (LTO).
 ifeq ($(USE_LTO),)
   USE_LTO = yes
 endif
 
-# If enabled, this option allows to compile the application in THUMB mode.
-ifeq ($(USE_THUMB),)
-  USE_THUMB = yes
-endif
-
 # Enable this if you want to see the full log while compiling.
 ifeq ($(USE_VERBOSE_COMPILE),)
   USE_VERBOSE_COMPILE = no
@@ -76,7 +71,7 @@ endif
 
 # FPU-related options.
 ifeq ($(USE_FPU_OPT),)
-  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16 -fsingle-precision-constant
+  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16
 endif
 
 #
@@ -84,13 +79,16 @@ endif
 ##############################################################################
 
 ##############################################################################
-# Project, sources and paths
+# Project, target, sources and paths
 #
 
 # Define project name here
 PROJECT = ch
 
-# Imported source files and paths
+# Target settings.
+MCU  = cortex-m4
+
+# Imported source files and paths.
 CHIBIOS  := ../../../..
 CONFDIR  := ./cfg/stm32f303_discovery
 BUILDDIR := ./build/stm32f303_discovery
@@ -131,34 +129,23 @@ CSRC = $(ALLCSRC) \
 # setting.
 CPPSRC = $(ALLCPPSRC)
 
-# C sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACSRC =
-
-# C++ sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACPPSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCPPSRC =
-
-# List ASM source files here
+# List ASM source files here.
 ASMSRC = $(ALLASMSRC)
+
+# List ASM with preprocessor source files here.
 ASMXSRC = $(ALLXASMSRC)
 
-INCDIR = $(ALLINC) $(TESTINC) $(CONFDIR)
+# Inclusion directories.
+INCDIR = $(CONFDIR) $(ALLINC) $(TESTINC)
+
+# Define C warning options here.
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
+
+# Define C++ warning options here.
+CPPWARN = -Wall -Wextra -Wundef
 
 #
-# Project, sources and paths
+# Project, target, sources and paths
 ##############################################################################
 
 ##############################################################################
@@ -185,43 +172,21 @@ ULIBS =
 ##############################################################################
 
 ##############################################################################
-# Compiler settings
+# Common rules
 #
 
-MCU  = cortex-m4
-
-#TRGT = arm-elf-
-TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
-# Enable loading with g++ only if you need C++ runtime support.
-# NOTE: You can use C++ even without C++ support if you are careful. C++
-#       runtime support makes code size explode.
-LD   = $(TRGT)gcc
-#LD   = $(TRGT)g++
-CP   = $(TRGT)objcopy
-AS   = $(TRGT)gcc -x assembler-with-cpp
-AR   = $(TRGT)ar
-OD   = $(TRGT)objdump
-SZ   = $(TRGT)size
-HEX  = $(CP) -O ihex
-BIN  = $(CP) -O binary
-
-# ARM-specific options here
-AOPT =
-
-# THUMB-specific options here
-TOPT = -mthumb -DTHUMB
-
-# Define C warning options here
-CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
-
-# Define C++ warning options here
-CPPWARN = -Wall -Wextra -Wundef
-
-#
-# Compiler settings
-##############################################################################
-
 RULESPATH = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk
+include $(RULESPATH)/arm-none-eabi.mk
 include $(RULESPATH)/rules.mk
+
+#
+# Common rules
+##############################################################################
+
+##############################################################################
+# Custom rules
+#
+
+#
+# Custom rules
+##############################################################################
diff --git a/testhal/STM32/multi/USB_CDC/make/stm32f407_discovery.make b/testhal/STM32/multi/USB_CDC/make/stm32f407_discovery.make
index 4408a9e9e..e52bdedf9 100644
--- a/testhal/STM32/multi/USB_CDC/make/stm32f407_discovery.make
+++ b/testhal/STM32/multi/USB_CDC/make/stm32f407_discovery.make
@@ -18,7 +18,7 @@ ifeq ($(USE_CPPOPT),)
   USE_CPPOPT = -fno-rtti
 endif
 
-# Enable this if you want the linker to remove unused code and data
+# Enable this if you want the linker to remove unused code and data.
 ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
@@ -28,16 +28,11 @@ ifeq ($(USE_LDOPT),)
   USE_LDOPT = 
 endif
 
-# Enable this if you want link time optimizations (LTO)
+# Enable this if you want link time optimizations (LTO).
 ifeq ($(USE_LTO),)
   USE_LTO = yes
 endif
 
-# If enabled, this option allows to compile the application in THUMB mode.
-ifeq ($(USE_THUMB),)
-  USE_THUMB = yes
-endif
-
 # Enable this if you want to see the full log while compiling.
 ifeq ($(USE_VERBOSE_COMPILE),)
   USE_VERBOSE_COMPILE = no
@@ -76,7 +71,7 @@ endif
 
 # FPU-related options.
 ifeq ($(USE_FPU_OPT),)
-  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16 -fsingle-precision-constant
+  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16
 endif
 
 #
@@ -84,13 +79,16 @@ endif
 ##############################################################################
 
 ##############################################################################
-# Project, sources and paths
+# Project, target, sources and paths
 #
 
 # Define project name here
 PROJECT = ch
 
-# Imported source files and paths
+# Target settings.
+MCU  = cortex-m4
+
+# Imported source files and paths.
 CHIBIOS  := ../../../..
 CONFDIR  := ./cfg/stm32f407_discovery
 BUILDDIR := ./build/stm32f407_discovery
@@ -131,34 +129,23 @@ CSRC = $(ALLCSRC) \
 # setting.
 CPPSRC = $(ALLCPPSRC)
 
-# C sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACSRC =
-
-# C++ sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACPPSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCPPSRC =
-
-# List ASM source files here
+# List ASM source files here.
 ASMSRC = $(ALLASMSRC)
+
+# List ASM with preprocessor source files here.
 ASMXSRC = $(ALLXASMSRC)
 
-INCDIR = $(ALLINC) $(TESTINC) $(CONFDIR)
+# Inclusion directories.
+INCDIR = $(CONFDIR) $(ALLINC) $(TESTINC)
+
+# Define C warning options here.
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
+
+# Define C++ warning options here.
+CPPWARN = -Wall -Wextra -Wundef
 
 #
-# Project, sources and paths
+# Project, target, sources and paths
 ##############################################################################
 
 ##############################################################################
@@ -185,43 +172,21 @@ ULIBS =
 ##############################################################################
 
 ##############################################################################
-# Compiler settings
+# Common rules
 #
 
-MCU  = cortex-m4
-
-#TRGT = arm-elf-
-TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
-# Enable loading with g++ only if you need C++ runtime support.
-# NOTE: You can use C++ even without C++ support if you are careful. C++
-#       runtime support makes code size explode.
-LD   = $(TRGT)gcc
-#LD   = $(TRGT)g++
-CP   = $(TRGT)objcopy
-AS   = $(TRGT)gcc -x assembler-with-cpp
-AR   = $(TRGT)ar
-OD   = $(TRGT)objdump
-SZ   = $(TRGT)size
-HEX  = $(CP) -O ihex
-BIN  = $(CP) -O binary
-
-# ARM-specific options here
-AOPT =
-
-# THUMB-specific options here
-TOPT = -mthumb -DTHUMB
-
-# Define C warning options here
-CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
-
-# Define C++ warning options here
-CPPWARN = -Wall -Wextra -Wundef
-
-#
-# Compiler settings
-##############################################################################
-
 RULESPATH = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk
+include $(RULESPATH)/arm-none-eabi.mk
 include $(RULESPATH)/rules.mk
+
+#
+# Common rules
+##############################################################################
+
+##############################################################################
+# Custom rules
+#
+
+#
+# Custom rules
+##############################################################################
diff --git a/testhal/STM32/multi/USB_CDC/make/stm32f746_discovery.make b/testhal/STM32/multi/USB_CDC/make/stm32f746_discovery.make
index 914b666ae..e60bc7a9d 100644
--- a/testhal/STM32/multi/USB_CDC/make/stm32f746_discovery.make
+++ b/testhal/STM32/multi/USB_CDC/make/stm32f746_discovery.make
@@ -18,7 +18,7 @@ ifeq ($(USE_CPPOPT),)
   USE_CPPOPT = -fno-rtti
 endif
 
-# Enable this if you want the linker to remove unused code and data
+# Enable this if you want the linker to remove unused code and data.
 ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
@@ -28,16 +28,11 @@ ifeq ($(USE_LDOPT),)
   USE_LDOPT = 
 endif
 
-# Enable this if you want link time optimizations (LTO)
+# Enable this if you want link time optimizations (LTO).
 ifeq ($(USE_LTO),)
   USE_LTO = yes
 endif
 
-# If enabled, this option allows to compile the application in THUMB mode.
-ifeq ($(USE_THUMB),)
-  USE_THUMB = yes
-endif
-
 # Enable this if you want to see the full log while compiling.
 ifeq ($(USE_VERBOSE_COMPILE),)
   USE_VERBOSE_COMPILE = no
@@ -76,7 +71,7 @@ endif
 
 # FPU-related options.
 ifeq ($(USE_FPU_OPT),)
-  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv5-sp-d16 -fsingle-precision-constant
+  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv5-sp-d16
 endif
 
 #
@@ -84,13 +79,16 @@ endif
 ##############################################################################
 
 ##############################################################################
-# Project, sources and paths
+# Project, target, sources and paths
 #
 
 # Define project name here
 PROJECT = ch
 
-# Imported source files and paths
+# Target settings.
+MCU  = cortex-m7
+
+# Imported source files and paths.
 CHIBIOS  := ../../../..
 CONFDIR  := ./cfg/stm32f746_discovery
 BUILDDIR := ./build/stm32f746_discovery
@@ -131,34 +129,23 @@ CSRC = $(ALLCSRC) \
 # setting.
 CPPSRC = $(ALLCPPSRC)
 
-# C sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACSRC =
-
-# C++ sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACPPSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCPPSRC =
-
-# List ASM source files here
+# List ASM source files here.
 ASMSRC = $(ALLASMSRC)
+
+# List ASM with preprocessor source files here.
 ASMXSRC = $(ALLXASMSRC)
 
-INCDIR = $(ALLINC) $(TESTINC) $(CONFDIR)
+# Inclusion directories.
+INCDIR = $(CONFDIR) $(ALLINC) $(TESTINC)
+
+# Define C warning options here.
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
+
+# Define C++ warning options here.
+CPPWARN = -Wall -Wextra -Wundef
 
 #
-# Project, sources and paths
+# Project, target, sources and paths
 ##############################################################################
 
 ##############################################################################
@@ -185,43 +172,21 @@ ULIBS =
 ##############################################################################
 
 ##############################################################################
-# Compiler settings
+# Common rules
 #
 
-MCU  = cortex-m7
-
-#TRGT = arm-elf-
-TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
-# Enable loading with g++ only if you need C++ runtime support.
-# NOTE: You can use C++ even without C++ support if you are careful. C++
-#       runtime support makes code size explode.
-LD   = $(TRGT)gcc
-#LD   = $(TRGT)g++
-CP   = $(TRGT)objcopy
-AS   = $(TRGT)gcc -x assembler-with-cpp
-AR   = $(TRGT)ar
-OD   = $(TRGT)objdump
-SZ   = $(TRGT)size
-HEX  = $(CP) -O ihex
-BIN  = $(CP) -O binary
-
-# ARM-specific options here
-AOPT =
-
-# THUMB-specific options here
-TOPT = -mthumb -DTHUMB
-
-# Define C warning options here
-CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
-
-# Define C++ warning options here
-CPPWARN = -Wall -Wextra -Wundef
-
-#
-# Compiler settings
-##############################################################################
-
 RULESPATH = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk
+include $(RULESPATH)/arm-none-eabi.mk
 include $(RULESPATH)/rules.mk
+
+#
+# Common rules
+##############################################################################
+
+##############################################################################
+# Custom rules
+#
+
+#
+# Custom rules
+##############################################################################
diff --git a/testhal/STM32/multi/USB_CDC/make/stm32h743_nucleo144.make b/testhal/STM32/multi/USB_CDC/make/stm32h743_nucleo144.make
index f9325ad0c..e12b580a4 100644
--- a/testhal/STM32/multi/USB_CDC/make/stm32h743_nucleo144.make
+++ b/testhal/STM32/multi/USB_CDC/make/stm32h743_nucleo144.make
@@ -18,7 +18,7 @@ ifeq ($(USE_CPPOPT),)
   USE_CPPOPT = -fno-rtti
 endif
 
-# Enable this if you want the linker to remove unused code and data
+# Enable this if you want the linker to remove unused code and data.
 ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
@@ -28,16 +28,11 @@ ifeq ($(USE_LDOPT),)
   USE_LDOPT = 
 endif
 
-# Enable this if you want link time optimizations (LTO)
+# Enable this if you want link time optimizations (LTO).
 ifeq ($(USE_LTO),)
   USE_LTO = yes
 endif
 
-# If enabled, this option allows to compile the application in THUMB mode.
-ifeq ($(USE_THUMB),)
-  USE_THUMB = yes
-endif
-
 # Enable this if you want to see the full log while compiling.
 ifeq ($(USE_VERBOSE_COMPILE),)
   USE_VERBOSE_COMPILE = no
@@ -84,13 +79,16 @@ endif
 ##############################################################################
 
 ##############################################################################
-# Project, sources and paths
+# Project, target, sources and paths
 #
 
 # Define project name here
 PROJECT = ch
 
-# Imported source files and paths
+# Target settings.
+MCU  = cortex-m7
+
+# Imported source files and paths.
 CHIBIOS  := ../../../..
 CONFDIR  := ./cfg/stm32h743_nucleo144
 BUILDDIR := ./build/stm32h743_nucleo144
@@ -131,34 +129,23 @@ CSRC = $(ALLCSRC) \
 # setting.
 CPPSRC = $(ALLCPPSRC)
 
-# C sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACSRC =
-
-# C++ sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACPPSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCPPSRC =
-
-# List ASM source files here
+# List ASM source files here.
 ASMSRC = $(ALLASMSRC)
+
+# List ASM with preprocessor source files here.
 ASMXSRC = $(ALLXASMSRC)
 
-INCDIR = $(ALLINC) $(TESTINC) $(CONFDIR)
+# Inclusion directories.
+INCDIR = $(CONFDIR) $(ALLINC) $(TESTINC)
+
+# Define C warning options here.
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
+
+# Define C++ warning options here.
+CPPWARN = -Wall -Wextra -Wundef
 
 #
-# Project, sources and paths
+# Project, target, sources and paths
 ##############################################################################
 
 ##############################################################################
@@ -185,43 +172,21 @@ ULIBS =
 ##############################################################################
 
 ##############################################################################
-# Compiler settings
+# Common rules
 #
 
-MCU  = cortex-m7
-
-#TRGT = arm-elf-
-TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
-# Enable loading with g++ only if you need C++ runtime support.
-# NOTE: You can use C++ even without C++ support if you are careful. C++
-#       runtime support makes code size explode.
-LD   = $(TRGT)gcc
-#LD   = $(TRGT)g++
-CP   = $(TRGT)objcopy
-AS   = $(TRGT)gcc -x assembler-with-cpp
-AR   = $(TRGT)ar
-OD   = $(TRGT)objdump
-SZ   = $(TRGT)size
-HEX  = $(CP) -O ihex
-BIN  = $(CP) -O binary
-
-# ARM-specific options here
-AOPT =
-
-# THUMB-specific options here
-TOPT = -mthumb -DTHUMB
-
-# Define C warning options here
-CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
-
-# Define C++ warning options here
-CPPWARN = -Wall -Wextra -Wundef
-
-#
-# Compiler settings
-##############################################################################
-
 RULESPATH = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk
+include $(RULESPATH)/arm-none-eabi.mk
 include $(RULESPATH)/rules.mk
+
+#
+# Common rules
+##############################################################################
+
+##############################################################################
+# Custom rules
+#
+
+#
+# Custom rules
+##############################################################################
diff --git a/testhal/STM32/multi/USB_CDC/make/stm32l476_discovery.make b/testhal/STM32/multi/USB_CDC/make/stm32l476_discovery.make
index 0d6611014..4423d8fd4 100644
--- a/testhal/STM32/multi/USB_CDC/make/stm32l476_discovery.make
+++ b/testhal/STM32/multi/USB_CDC/make/stm32l476_discovery.make
@@ -18,7 +18,7 @@ ifeq ($(USE_CPPOPT),)
   USE_CPPOPT = -fno-rtti
 endif
 
-# Enable this if you want the linker to remove unused code and data
+# Enable this if you want the linker to remove unused code and data.
 ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
@@ -28,16 +28,11 @@ ifeq ($(USE_LDOPT),)
   USE_LDOPT = 
 endif
 
-# Enable this if you want link time optimizations (LTO)
+# Enable this if you want link time optimizations (LTO).
 ifeq ($(USE_LTO),)
   USE_LTO = yes
 endif
 
-# If enabled, this option allows to compile the application in THUMB mode.
-ifeq ($(USE_THUMB),)
-  USE_THUMB = yes
-endif
-
 # Enable this if you want to see the full log while compiling.
 ifeq ($(USE_VERBOSE_COMPILE),)
   USE_VERBOSE_COMPILE = no
@@ -76,7 +71,7 @@ endif
 
 # FPU-related options.
 ifeq ($(USE_FPU_OPT),)
-  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16 -fsingle-precision-constant
+  USE_FPU_OPT = -mfloat-abi=$(USE_FPU) -mfpu=fpv4-sp-d16
 endif
 
 #
@@ -84,13 +79,16 @@ endif
 ##############################################################################
 
 ##############################################################################
-# Project, sources and paths
+# Project, target, sources and paths
 #
 
 # Define project name here
 PROJECT = ch
 
-# Imported source files and paths
+# Target settings.
+MCU  = cortex-m4
+
+# Imported source files and paths.
 CHIBIOS  := ../../../..
 CONFDIR  := ./cfg/stm32l476_discovery
 BUILDDIR := ./build/stm32l476_discovery
@@ -131,34 +129,23 @@ CSRC = $(ALLCSRC) \
 # setting.
 CPPSRC = $(ALLCPPSRC)
 
-# C sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACSRC =
-
-# C++ sources to be compiled in ARM mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-ACPPSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCSRC =
-
-# C sources to be compiled in THUMB mode regardless of the global setting.
-# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
-#       option that results in lower performance and larger code size.
-TCPPSRC =
-
-# List ASM source files here
+# List ASM source files here.
 ASMSRC = $(ALLASMSRC)
+
+# List ASM with preprocessor source files here.
 ASMXSRC = $(ALLXASMSRC)
 
-INCDIR = $(ALLINC) $(TESTINC) $(CONFDIR)
+# Inclusion directories.
+INCDIR = $(CONFDIR) $(ALLINC) $(TESTINC)
+
+# Define C warning options here.
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
+
+# Define C++ warning options here.
+CPPWARN = -Wall -Wextra -Wundef
 
 #
-# Project, sources and paths
+# Project, target, sources and paths
 ##############################################################################
 
 ##############################################################################
@@ -185,43 +172,21 @@ ULIBS =
 ##############################################################################
 
 ##############################################################################
-# Compiler settings
+# Common rules
 #
 
-MCU  = cortex-m4
-
-#TRGT = arm-elf-
-TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
-# Enable loading with g++ only if you need C++ runtime support.
-# NOTE: You can use C++ even without C++ support if you are careful. C++
-#       runtime support makes code size explode.
-LD   = $(TRGT)gcc
-#LD   = $(TRGT)g++
-CP   = $(TRGT)objcopy
-AS   = $(TRGT)gcc -x assembler-with-cpp
-AR   = $(TRGT)ar
-OD   = $(TRGT)objdump
-SZ   = $(TRGT)size
-HEX  = $(CP) -O ihex
-BIN  = $(CP) -O binary
-
-# ARM-specific options here
-AOPT =
-
-# THUMB-specific options here
-TOPT = -mthumb -DTHUMB
-
-# Define C warning options here
-CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
-
-# Define C++ warning options here
-CPPWARN = -Wall -Wextra -Wundef
-
-#
-# Compiler settings
-##############################################################################
-
 RULESPATH = $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk
+include $(RULESPATH)/arm-none-eabi.mk
 include $(RULESPATH)/rules.mk
+
+#
+# Common rules
+##############################################################################
+
+##############################################################################
+# Custom rules
+#
+
+#
+# Custom rules
+##############################################################################