use fixed number instead of nproc

firmware/bootloader/compile_bootloader.sh

@@ -9,7 +9,7 @@ echo "Entering $SCRIPT_NAME"
 BOOTLOADER_CODE_DESTINATION_FILE=$BOOTLOADER_CODE_DESTINATION_PATH/bootloader_generated.hxx
 
 echo "$SCRIPT_NAME: Starting bootloader compilation..."
-make -j$(nproc) -f src/Makefile $1 $2 $3
+make -j6 -f src/Makefile $1 $2 $3
 
 # downstream scripts detect error condition by checking if the output file exists so we need to make sure we remove it
 [ $? -eq 0 ] || { echo "ERROR: bootloader compilation failed"; rm -f blbuild/$BOOTLOADER_CODE_DESTINATION_FILE ; exit 1; }

firmware/config/boards/common_make.sh

@@ -12,8 +12,7 @@ echo "Entering $SCRIPT_NAME with board $1 and CPU $2"
 cd ../../..
 
 mkdir -p .dep
-# todo: start using env variable for number of threads or for '-r'
-make -j$(nproc) -r PROJECT_BOARD=$PROJECT_BOARD PROJECT_CPU=$PROJECT_CPU
+make -j6 -r PROJECT_BOARD=$PROJECT_BOARD PROJECT_CPU=$PROJECT_CPU
 [ -e build/fome.hex ] || { echo "FAILED to compile by $SCRIPT_NAME with $PROJECT_BOARD $DEBUG_LEVEL_OPT and $EXTRA_PARAMS"; exit 1; }
 if [ "$USE_OPENBLT" = "yes" ]; then
   make openblt PROJECT_BOARD=$PROJECT_BOARD PROJECT_CPU=$PROJECT_CPU

simulator/compile.sh

@@ -3,7 +3,7 @@
 set -e
 
 rm -f build/rusefi_simulator.exe
-make -j$(nproc) -r $@
+make -j6 -r $@
 [ $? -eq 0 ] || { echo "Simulator compilation failed"; exit 1; }
 file build/rusefi_simulator
 echo "TIMESTAMP $(date "+%D %T.%2N") just compiled rusEFI simulator"

unit_tests/clean_compile.sh

@@ -4,4 +4,4 @@ echo "Compiling unit tests"
 make clean
 # todo: how comes .dep is not being cleaned by 'make clean'?
 rm -rf .dep/
-make -j$(nproc)
+make -j6

unit_tests/run_clean_gcov.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
 make clean
-make -j$(nproc)
+make -j6
 build/rusefi_test
 bash ci_gcov.sh "$RUSEFI_DOXYGEN_FTP_USER" "$RUSEFI_DOXYGEN_FTP_PASS" "$RUSEFI_FTP_SERVER"