I am trying to use a macro to enable c99 in some of my cmake modules.
In the top level cmake file I add this macro
macro(use_c99)
if (CMAKE_VERSION VERSION_LESS "3.1")
if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
set (CMAKE_C_FLAGS "--std=gnu99 ${CMAKE_C_FLAGS}")
endif ()
else ()
set (CMAKE_C_STANDARD 99)
endif ()
endmacro(use_c99)
then in another CMakeLists.txt file I add
use_c99()
but I get this error:
CMake Error at source/internal_src/cube/CMakeLists.txt:1 (use_c
99):
Unknown CMake command "use_c99".
why am I unable to use the macro? My main cmake is using 3.0.2 from debian
repository.
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