build: Add variable printing target to Makefiles
I kept finding myself needing these to debug our build system, since they are innocuous and are very helpful they probably belong in the codebase. Source: John Graham-Cumming https://www.cmcrossroads.com/article/printing-value-makefile-variable
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or https://www.opensource.org/licenses/mit-license.php .
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# Pattern rule to print variables, e.g. make print-top_srcdir
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print-%:
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@echo $* = $($*)
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ACLOCAL_AMFLAGS = -I build-aux/m4
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SUBDIRS = src
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if ENABLE_MAN
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@ -1,5 +1,9 @@
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.NOTPARALLEL :
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# Pattern rule to print variables, e.g. make print-top_srcdir
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print-%:
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@echo $* = $($*)
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SOURCES_PATH ?= $(BASEDIR)/sources
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BASE_CACHE ?= $(BASEDIR)/built
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SDK_PATH ?= $(BASEDIR)/SDKs
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