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cmake: Toolchain abstraction: Introducing macro toolchain_cc_cstd_flag

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The macro obtains the toolchain specific flag and value for
setting of the requested c standard.

The intent here is to abstract Zephyr's dependence on toolchains,
thus allowing for easier porting to other, perhaps commercial,
toolchains and/or usecases.

No functional change expected.

Signed-off-by: Danny Oerndrup <daor@demant.com>
This commit is contained in:
Danny Oerndrup 2019-06-13 15:33:03 +02:00 committed by Alberto Escolar
parent d0d963a85d
commit 6331dae623
2 changed files with 9 additions and 1 deletions
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4
CMakeLists.txt
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@ -984,8 +984,10 @@ get_property(GKSF GLOBAL PROPERTY GENERATED_KERNEL_SOURCE_FILES)
get_property(CSTD GLOBAL PROPERTY CSTD)
set_ifndef(CSTD c99)
# @Intent: Obtain compiler specific flag for specifying the c standard
toolchain_cc_cstd_flag(CC_CSTD ${CSTD})
zephyr_compile_options(
$<$<COMPILE_LANGUAGE:C>:-std=${CSTD}>
$<$<COMPILE_LANGUAGE:C>:${CC_CSTD}>
)
# @Intent: Configure linker scripts, i.e. generate linker scripts with variables substituted

6
cmake/compiler/gcc/target_base.cmake
View file

@ -12,3 +12,9 @@ macro(toolchain_cc_nocommon)
zephyr_compile_options(-fno-common)
endmacro()
macro(toolchain_cc_cstd_flag dest_var_name c_std)
set_ifndef(${dest_var_name} "-std=${c_std}")
endmacro()