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buildsystem: Exporting CXXFLAGS and including them in the generated cmake toolchains. #21681

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buildsystem: Exporting CXXFLAGS and including them in the generated cmake toolchains. #21681

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b97ab42
buildsystem: export CXXFLAGS
LeonardHerbst Aug 22, 2025
218fa70
dist/tools/cmake: include CXXFLAGS in the generated toolchian
LeonardHerbst Aug 22, 2025
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1 change: 0 additions & 1 deletion Makefile.base
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Expand Up @@ -143,7 +143,6 @@ $(MODULE).cleanup:
$(Q)# cleanup non selected source files objects
$(Q)$(RM) $(OBJECTS_TO_REMOVE)

CXXFLAGS = $(filter-out $(CXXUWFLAGS), $(CFLAGS)) $(CXXEXFLAGS)
CCASFLAGS = $(filter-out $(CCASUWFLAGS), $(CFLAGS)) $(CCASEXFLAGS)

# compile and generate dependency info
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1 change: 1 addition & 0 deletions dist/tools/cmake/generate-xcompile-toolchain.sh
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Expand Up @@ -23,6 +23,7 @@ printf 'SET(CMAKE_RANLIB [==[%s]==] CACHE STRING "")\n' "${RANLIB}"
# disable linker test
printf 'SET(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)\n'
printf 'SET(CMAKE_C_FLAGS [==[%s]==] CACHE STRING "")\n' "${CFLAGS}"
printf 'SET(CMAKE_CXX_FLAGS [==[%s]==] CACHE STRING "")\n' "${CXXFLAGS}"
printf 'SET(CMAKE_EXE_LINKER_FLAGS [==[%s]==] CACHE STRING "")\n' "${LFLAGS}"
# search for programs in the build host directories
printf 'SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)\n'
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2 changes: 2 additions & 0 deletions makefiles/cflags.inc.mk
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Expand Up @@ -128,3 +128,5 @@ endif
ifneq (,$(RAM_LEN))
CFLAGS += -DCPU_RAM_SIZE=$(shell printf "0x%x" $$(($(RAM_LEN:%K=%*1024))))
endif

CXXFLAGS = $(filter-out $(CXXUWFLAGS), $(CFLAGS)) $(CXXEXFLAGS)
1 change: 1 addition & 0 deletions makefiles/vars.inc.mk
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Expand Up @@ -72,6 +72,7 @@ export CCAS # The C compiler to use for assembler files, typica
export CFLAGS # The compiler flags. Must only ever be used with `+=`.
export CFLAGS_CPU # CPU architecture specific compiler flags
export CFLAGS_STATIC_ANALYSIS# Additional CFLAGS to use when static analysis should be enabled
export CXXFLAGS # The CXX compiler flags.
export CXXUWFLAGS # (Patterns of) flags in CFLAGS that should not be passed to CXX.
export CXXEXFLAGS # Additional flags that should be passed to CXX.
export CCASUWFLAGS # (Patterns of) flags in CFLAGS that should not be passed to CCAS.
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