Makefile - platform/external/lz4 - Git at Google

 # ################################################################
 # LZ4 - Makefile
 # Copyright (C) Yann Collet 2011-2020
 # All rights reserved.
 #
 # BSD license
 # Redistribution and use in source and binary forms, with or without modification,
 # are permitted provided that the following conditions are met:
 #
 # * Redistributions of source code must retain the above copyright notice, this
 #   list of conditions and the following disclaimer.
 #
 # * Redistributions in binary form must reproduce the above copyright notice, this
 #   list of conditions and the following disclaimer in the documentation and/or
 #   other materials provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 # ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 # You can contact the author at :
 #  - LZ4 source repository : https://github.com/lz4/lz4
 #  - LZ4 forum froup : https://groups.google.com/forum/#!forum/lz4c
 # ################################################################

 LZ4DIR  = lib
 PRGDIR  = programs
 TESTDIR = tests
 EXDIR   = examples
 FUZZDIR = ossfuzz

 include Makefile.inc


 .PHONY: default
 default: lib-release lz4-release

 # silent mode by default; verbose can be triggered by V=1 or VERBOSE=1
 $(V)$(VERBOSE).SILENT:

 .PHONY: all
 all: allmost examples manuals build_tests

 .PHONY: allmost
 allmost: lib lz4

 .PHONY: lib lib-release liblz4.a
 lib: liblz4.a
 lib lib-release liblz4.a:
 	$(MAKE) -C $(LZ4DIR) $@

 .PHONY: lz4 lz4-release
 lz4 : liblz4.a
 lz4-release : lib-release
 lz4 lz4-release :
 	$(MAKE) -C $(PRGDIR) $@
 	cp $(PRGDIR)/lz4$(EXT) .

 .PHONY: examples
 examples: liblz4.a
 	$(MAKE) -C $(EXDIR) all

 .PHONY: manuals
 manuals:
 	$(MAKE) -C contrib/gen_manual $@

 .PHONY: build_tests
 build_tests:
 	$(MAKE) -C $(TESTDIR) all

 .PHONY: clean
 clean:
 	$(MAKE) -C $(LZ4DIR) $@ > $(VOID)
 	$(MAKE) -C $(PRGDIR) $@ > $(VOID)
 	$(MAKE) -C $(TESTDIR) $@ > $(VOID)
 	$(MAKE) -C $(EXDIR) $@ > $(VOID)
 	$(MAKE) -C $(FUZZDIR) $@ > $(VOID)
 	$(MAKE) -C contrib/gen_manual $@ > $(VOID)
 	$(RM) lz4$(EXT)
 	$(RM) -r $(CMAKE_BUILD_DIR)
 	@echo Cleaning completed


 #-----------------------------------------------------------------------------
 # make install is validated only for Posix environments
 #-----------------------------------------------------------------------------
 ifeq ($(POSIX_ENV),Yes)
 HOST_OS = POSIX

 .PHONY: install uninstall
 install uninstall:
 	$(MAKE) -C $(LZ4DIR) $@
 	$(MAKE) -C $(PRGDIR) $@

 .PHONY: travis-install
 travis-install:
 	$(MAKE) -j1 install DESTDIR=~/install_test_dir

 endif   # POSIX_ENV


 CMAKE ?= cmake
 CMAKE_BUILD_DIR ?= build/cmake/build
 ifneq (,$(filter MSYS%,$(shell $(UNAME))))
 HOST_OS = MSYS
 CMAKE_PARAMS = -G"MSYS Makefiles"
 endif

 .PHONY: cmake
 cmake:
 	mkdir -p $(CMAKE_BUILD_DIR)
 	cd $(CMAKE_BUILD_DIR); $(CMAKE) $(CMAKE_PARAMS) ..; $(CMAKE) --build .


 #------------------------------------------------------------------------
 # make tests validated only for MSYS and Posix environments
 #------------------------------------------------------------------------
 ifneq (,$(filter $(HOST_OS),MSYS POSIX))

 .PHONY: list
 list:
 	$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | sort | egrep -v -e '^[^[:alnum:]]' -e '^$@$$' | xargs

 .PHONY: check
 check:
 	$(MAKE) -C $(TESTDIR) test-lz4-essentials

 .PHONY: test
 test:
 	$(MAKE) -C $(TESTDIR) $@
 	$(MAKE) -C $(EXDIR) $@

 .PHONY: clangtest
 clangtest: CFLAGS += -Werror -Wconversion -Wno-sign-conversion
 clangtest: CC = clang
 clangtest: clean
 	$(CC) -v
 	$(MAKE) -C $(LZ4DIR)  all CC=$(CC)
 	$(MAKE) -C $(PRGDIR)  all CC=$(CC)
 	$(MAKE) -C $(TESTDIR) all CC=$(CC)

 .PHONY: clangtest-native
 clangtest-native: CFLAGS = -O3 -Werror -Wconversion -Wno-sign-conversion
 clangtest-native: clean
 	clang -v
 	$(MAKE) -C $(LZ4DIR)  all    CC=clang
 	$(MAKE) -C $(PRGDIR)  native CC=clang
 	$(MAKE) -C $(TESTDIR) native CC=clang

 .PHONY: usan
 usan: CC      = clang
 usan: CFLAGS  = -O3 -g -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-recover=pointer-overflow
 usan: LDFLAGS = $(CFLAGS)
 usan: clean
 	CC=$(CC) CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS)' $(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1

 .PHONY: usan32
 usan32: CFLAGS = -m32 -O3 -g -fsanitize=undefined
 usan32: LDFLAGS = $(CFLAGS)
 usan32: clean
 	$(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1

 SCANBUILD ?= scan-build
 SCANBUILD_FLAGS += --status-bugs -v --force-analyze-debug-code
 .PHONY: staticAnalyze
 staticAnalyze: clean
 	CPPFLAGS=-DLZ4_DEBUG=1 CFLAGS=-g $(SCANBUILD) $(SCANBUILD_FLAGS) $(MAKE) all V=1 DEBUGLEVEL=1

 .PHONY: cppcheck
 cppcheck:
 	cppcheck . --force --enable=warning,portability,performance,style --error-exitcode=1 > /dev/null

 .PHONY: platformTest
 platformTest: clean
 	@echo "\n ---- test lz4 with $(CC) compiler ----"
 	$(CC) -v
 	CFLAGS="-O3 -Werror"         $(MAKE) -C $(LZ4DIR) all
 	CFLAGS="-O3 -Werror -static" $(MAKE) -C $(PRGDIR) all
 	CFLAGS="-O3 -Werror -static" $(MAKE) -C $(TESTDIR) all
 	$(MAKE) -C $(TESTDIR) test-platform

 .PHONY: versionsTest
 versionsTest: clean
 	$(MAKE) -C $(TESTDIR) $@

 .PHONY: test-freestanding
 test-freestanding:
 	$(MAKE) -C $(TESTDIR) clean $@

 .PHONY: cxxtest cxx32test
 cxxtest cxx32test: CC := "$(CXX) -Wno-deprecated"
 cxxtest cxx32test: CFLAGS = -O3 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror
 cxx32test: CFLAGS += -m32
 cxxtest cxx32test: clean
 	$(CXX) -v
 	CC=$(CC) $(MAKE) -C $(LZ4DIR)  all CFLAGS="$(CFLAGS)"
 	CC=$(CC) $(MAKE) -C $(PRGDIR)  all CFLAGS="$(CFLAGS)"
 	CC=$(CC) $(MAKE) -C $(TESTDIR) all CFLAGS="$(CFLAGS)"

 .PHONY: cxx17build
 cxx17build : CC = "$(CXX) -Wno-deprecated"
 cxx17build : CFLAGS = -std=c++17 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror -pedantic
 cxx17build : clean
 	$(CXX) -v
 	CC=$(CC) $(MAKE) -C $(LZ4DIR)  all CFLAGS="$(CFLAGS)"
 	CC=$(CC) $(MAKE) -C $(PRGDIR)  all CFLAGS="$(CFLAGS)"
 	CC=$(CC) $(MAKE) -C $(TESTDIR) all CFLAGS="$(CFLAGS)"

 .PHONY: ctocpptest
 ctocpptest: LIBCC="$(CC)"
 ctocpptest: TESTCC="$(CXX)"
 ctocpptest: CFLAGS=
 ctocpptest: clean
 	CC=$(LIBCC)  $(MAKE) -C $(LZ4DIR)  CFLAGS="$(CFLAGS)" all
 	CC=$(LIBCC)  $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" lz4.o lz4hc.o lz4frame.o
 	CC=$(TESTCC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" all

 .PHONY: c_standards
 c_standards: clean c_standards_c11 c_standards_c99 c_standards_c90

 .PHONY: c_standards_c90
 c_standards_c90: clean
 	$(MAKE) clean; CFLAGS="-std=c90   -Werror -pedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost
 	$(MAKE) clean; CFLAGS="-std=gnu90 -Werror -pedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost

 .PHONY: c_standards_c99
 c_standards_c99: clean
 	$(MAKE) clean; CFLAGS="-std=c99   -Werror -pedantic" $(MAKE) all
 	$(MAKE) clean; CFLAGS="-std=gnu99 -Werror -pedantic" $(MAKE) all

 .PHONY: c_standards_c11
 c_standards_c11: clean
 	$(MAKE) clean; CFLAGS="-std=c11 -Werror" $(MAKE) all

 # The following test ensures that standard Makefile variables set through environment
 # are correctly transmitted at compilation stage.
 # This test is meant to detect issues like https://github.com/lz4/lz4/issues/958
 .PHONY: standard_variables
 standard_variables: clean
 	@echo =================
 	@echo Check support of Makefile Standard variables through environment
 	@echo note : this test requires V=1 to work properly
 	@echo =================
 	CC="cc -DCC_TEST" \
 	CFLAGS=-DCFLAGS_TEST \
 	CPPFLAGS=-DCPPFLAGS_TEST \
 	LDFLAGS=-DLDFLAGS_TEST \
 	LDLIBS=-DLDLIBS_TEST \
 	$(MAKE) V=1 > tmpsv
 	# Note: just checking the presence of custom flags
 	# would not detect situations where custom flags are
 	# supported in some part of the Makefile, and missed in others.
 	# So the test checks if they are present the _right nb of times_.
 	# However, checking static quantities makes this test brittle,
 	# because quantities (7, 2 and 1) can still evolve in future,
 	# for example when source directories or Makefile evolve.
 	if [ $$(grep CC_TEST tmpsv | wc -l) -ne 7 ]; then \
 		echo "CC environment variable missed" && False; fi
 	if [ $$(grep CFLAGS_TEST tmpsv | wc -l) -ne 7 ]; then \
 		echo "CFLAGS environment variable missed" && False; fi
 	if [ $$(grep CPPFLAGS_TEST tmpsv | wc -l) -ne 7 ]; then \
 		echo "CPPFLAGS environment variable missed" && False; fi
 	if [ $$(grep LDFLAGS_TEST tmpsv | wc -l) -ne 2 ]; then \
 		echo "LDFLAGS environment variable missed" && False; fi
 	if [ $$(grep LDLIBS_TEST tmpsv | wc -l) -ne 1 ]; then \
 		echo "LDLIBS environment variable missed" && False; fi
 	@echo =================
 	@echo all custom variables detected
 	@echo =================
 	$(RM) tmpsv

 endif   # MSYS POSIX
	# ################################################################
	# LZ4 - Makefile
	# Copyright (C) Yann Collet 2011-2020
	# All rights reserved.
	#
	# BSD license
	# Redistribution and use in source and binary forms, with or without modification,
	# are permitted provided that the following conditions are met:
	#
	# * Redistributions of source code must retain the above copyright notice, this
	# list of conditions and the following disclaimer.
	#
	# * Redistributions in binary form must reproduce the above copyright notice, this
	# list of conditions and the following disclaimer in the documentation and/or
	# other materials provided with the distribution.
	#
	# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
	# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
	# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
	# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	#
	# You can contact the author at :
	# - LZ4 source repository : https://github.com/lz4/lz4
	# - LZ4 forum froup : https://groups.google.com/forum/#!forum/lz4c
	# ################################################################

	LZ4DIR = lib
	PRGDIR = programs
	TESTDIR = tests
	EXDIR = examples
	FUZZDIR = ossfuzz

	include Makefile.inc


	.PHONY: default
	default: lib-release lz4-release

	# silent mode by default; verbose can be triggered by V=1 or VERBOSE=1
	$(V)$(VERBOSE).SILENT:

	.PHONY: all
	all: allmost examples manuals build_tests

	.PHONY: allmost
	allmost: lib lz4

	.PHONY: lib lib-release liblz4.a
	lib: liblz4.a
	lib lib-release liblz4.a:
	$(MAKE) -C $(LZ4DIR) $@

	.PHONY: lz4 lz4-release
	lz4 : liblz4.a
	lz4-release : lib-release
	lz4 lz4-release :
	$(MAKE) -C $(PRGDIR) $@
	cp $(PRGDIR)/lz4$(EXT) .

	.PHONY: examples
	examples: liblz4.a
	$(MAKE) -C $(EXDIR) all

	.PHONY: manuals
	manuals:
	$(MAKE) -C contrib/gen_manual $@

	.PHONY: build_tests
	build_tests:
	$(MAKE) -C $(TESTDIR) all

	.PHONY: clean
	clean:
	$(MAKE) -C $(LZ4DIR) $@ > $(VOID)
	$(MAKE) -C $(PRGDIR) $@ > $(VOID)
	$(MAKE) -C $(TESTDIR) $@ > $(VOID)
	$(MAKE) -C $(EXDIR) $@ > $(VOID)
	$(MAKE) -C $(FUZZDIR) $@ > $(VOID)
	$(MAKE) -C contrib/gen_manual $@ > $(VOID)
	$(RM) lz4$(EXT)
	$(RM) -r $(CMAKE_BUILD_DIR)
	@echo Cleaning completed


	#-----------------------------------------------------------------------------
	# make install is validated only for Posix environments
	#-----------------------------------------------------------------------------
	ifeq ($(POSIX_ENV),Yes)
	HOST_OS = POSIX

	.PHONY: install uninstall
	install uninstall:
	$(MAKE) -C $(LZ4DIR) $@
	$(MAKE) -C $(PRGDIR) $@

	.PHONY: travis-install
	travis-install:
	$(MAKE) -j1 install DESTDIR=~/install_test_dir

	endif # POSIX_ENV


	CMAKE ?= cmake
	CMAKE_BUILD_DIR ?= build/cmake/build
	ifneq (,$(filter MSYS%,$(shell $(UNAME))))
	HOST_OS = MSYS
	CMAKE_PARAMS = -G"MSYS Makefiles"
	endif

	.PHONY: cmake
	cmake:
	mkdir -p $(CMAKE_BUILD_DIR)
	cd $(CMAKE_BUILD_DIR); $(CMAKE) $(CMAKE_PARAMS) ..; $(CMAKE) --build .


	#------------------------------------------------------------------------
	# make tests validated only for MSYS and Posix environments
	#------------------------------------------------------------------------
	ifneq (,$(filter $(HOST_OS),MSYS POSIX))

	.PHONY: list
	list:
	$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null \| awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' \| sort \| egrep -v -e '^[^[:alnum:]]' -e '^$@$$' \| xargs

	.PHONY: check
	check:
	$(MAKE) -C $(TESTDIR) test-lz4-essentials

	.PHONY: test
	test:
	$(MAKE) -C $(TESTDIR) $@
	$(MAKE) -C $(EXDIR) $@

	.PHONY: clangtest
	clangtest: CFLAGS += -Werror -Wconversion -Wno-sign-conversion
	clangtest: CC = clang
	clangtest: clean
	$(CC) -v
	$(MAKE) -C $(LZ4DIR) all CC=$(CC)
	$(MAKE) -C $(PRGDIR) all CC=$(CC)
	$(MAKE) -C $(TESTDIR) all CC=$(CC)

	.PHONY: clangtest-native
	clangtest-native: CFLAGS = -O3 -Werror -Wconversion -Wno-sign-conversion
	clangtest-native: clean
	clang -v
	$(MAKE) -C $(LZ4DIR) all CC=clang
	$(MAKE) -C $(PRGDIR) native CC=clang
	$(MAKE) -C $(TESTDIR) native CC=clang

	.PHONY: usan
	usan: CC = clang
	usan: CFLAGS = -O3 -g -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-recover=pointer-overflow
	usan: LDFLAGS = $(CFLAGS)
	usan: clean
	CC=$(CC) CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS)' $(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1

	.PHONY: usan32
	usan32: CFLAGS = -m32 -O3 -g -fsanitize=undefined
	usan32: LDFLAGS = $(CFLAGS)
	usan32: clean
	$(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1

	SCANBUILD ?= scan-build
	SCANBUILD_FLAGS += --status-bugs -v --force-analyze-debug-code
	.PHONY: staticAnalyze
	staticAnalyze: clean
	CPPFLAGS=-DLZ4_DEBUG=1 CFLAGS=-g $(SCANBUILD) $(SCANBUILD_FLAGS) $(MAKE) all V=1 DEBUGLEVEL=1

	.PHONY: cppcheck
	cppcheck:
	cppcheck . --force --enable=warning,portability,performance,style --error-exitcode=1 > /dev/null

	.PHONY: platformTest
	platformTest: clean
	@echo "\n ---- test lz4 with $(CC) compiler ----"
	$(CC) -v
	CFLAGS="-O3 -Werror" $(MAKE) -C $(LZ4DIR) all
	CFLAGS="-O3 -Werror -static" $(MAKE) -C $(PRGDIR) all
	CFLAGS="-O3 -Werror -static" $(MAKE) -C $(TESTDIR) all
	$(MAKE) -C $(TESTDIR) test-platform

	.PHONY: versionsTest
	versionsTest: clean
	$(MAKE) -C $(TESTDIR) $@

	.PHONY: test-freestanding
	test-freestanding:
	$(MAKE) -C $(TESTDIR) clean $@

	.PHONY: cxxtest cxx32test
	cxxtest cxx32test: CC := "$(CXX) -Wno-deprecated"
	cxxtest cxx32test: CFLAGS = -O3 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror
	cxx32test: CFLAGS += -m32
	cxxtest cxx32test: clean
	$(CXX) -v
	CC=$(CC) $(MAKE) -C $(LZ4DIR) all CFLAGS="$(CFLAGS)"
	CC=$(CC) $(MAKE) -C $(PRGDIR) all CFLAGS="$(CFLAGS)"
	CC=$(CC) $(MAKE) -C $(TESTDIR) all CFLAGS="$(CFLAGS)"

	.PHONY: cxx17build
	cxx17build : CC = "$(CXX) -Wno-deprecated"
	cxx17build : CFLAGS = -std=c++17 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror -pedantic
	cxx17build : clean
	$(CXX) -v
	CC=$(CC) $(MAKE) -C $(LZ4DIR) all CFLAGS="$(CFLAGS)"
	CC=$(CC) $(MAKE) -C $(PRGDIR) all CFLAGS="$(CFLAGS)"
	CC=$(CC) $(MAKE) -C $(TESTDIR) all CFLAGS="$(CFLAGS)"

	.PHONY: ctocpptest
	ctocpptest: LIBCC="$(CC)"
	ctocpptest: TESTCC="$(CXX)"
	ctocpptest: CFLAGS=
	ctocpptest: clean
	CC=$(LIBCC) $(MAKE) -C $(LZ4DIR) CFLAGS="$(CFLAGS)" all
	CC=$(LIBCC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" lz4.o lz4hc.o lz4frame.o
	CC=$(TESTCC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" all

	.PHONY: c_standards
	c_standards: clean c_standards_c11 c_standards_c99 c_standards_c90

	.PHONY: c_standards_c90
	c_standards_c90: clean
	$(MAKE) clean; CFLAGS="-std=c90 -Werror -pedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost
	$(MAKE) clean; CFLAGS="-std=gnu90 -Werror -pedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost

	.PHONY: c_standards_c99
	c_standards_c99: clean
	$(MAKE) clean; CFLAGS="-std=c99 -Werror -pedantic" $(MAKE) all
	$(MAKE) clean; CFLAGS="-std=gnu99 -Werror -pedantic" $(MAKE) all

	.PHONY: c_standards_c11
	c_standards_c11: clean
	$(MAKE) clean; CFLAGS="-std=c11 -Werror" $(MAKE) all

	# The following test ensures that standard Makefile variables set through environment
	# are correctly transmitted at compilation stage.
	# This test is meant to detect issues like https://github.com/lz4/lz4/issues/958
	.PHONY: standard_variables
	standard_variables: clean
	@echo =================
	@echo Check support of Makefile Standard variables through environment
	@echo note : this test requires V=1 to work properly
	@echo =================
	CC="cc -DCC_TEST" \
	CFLAGS=-DCFLAGS_TEST \
	CPPFLAGS=-DCPPFLAGS_TEST \
	LDFLAGS=-DLDFLAGS_TEST \
	LDLIBS=-DLDLIBS_TEST \
	$(MAKE) V=1 > tmpsv
	# Note: just checking the presence of custom flags
	# would not detect situations where custom flags are
	# supported in some part of the Makefile, and missed in others.
	# So the test checks if they are present the _right nb of times_.
	# However, checking static quantities makes this test brittle,
	# because quantities (7, 2 and 1) can still evolve in future,
	# for example when source directories or Makefile evolve.
	if [ $$(grep CC_TEST tmpsv \| wc -l) -ne 7 ]; then \
	echo "CC environment variable missed" && False; fi
	if [ $$(grep CFLAGS_TEST tmpsv \| wc -l) -ne 7 ]; then \
	echo "CFLAGS environment variable missed" && False; fi
	if [ $$(grep CPPFLAGS_TEST tmpsv \| wc -l) -ne 7 ]; then \
	echo "CPPFLAGS environment variable missed" && False; fi
	if [ $$(grep LDFLAGS_TEST tmpsv \| wc -l) -ne 2 ]; then \
	echo "LDFLAGS environment variable missed" && False; fi
	if [ $$(grep LDLIBS_TEST tmpsv \| wc -l) -ne 1 ]; then \
	echo "LDLIBS environment variable missed" && False; fi
	@echo =================
	@echo all custom variables detected
	@echo =================
	$(RM) tmpsv

	endif # MSYS POSIX