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CMakeLists: unconditionally define _GNU_SOURCE 

This fixes compilation on musl libc.

Link: https://github.com/linux-can/can-utils/pull/326
Reported-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
pull/328/head
Marc Kleine-Budde 2021-12-30 12:54:58 +01:00
parent 6bd7ced052
commit da642181a9
1 changed files with 1 additions and 4 deletions
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5
CMakeLists.txt
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@ -9,10 +9,7 @@ if(NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE Release)
endif()
check_symbol_exists(__GNU_LIBRARY__ "features.h" _GNU_SOURCE)
if(_GNU_SOURCE)
add_definitions(-D_GNU_SOURCE)
endif()
add_definitions(-D_GNU_SOURCE)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wno-parentheses")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-strict-aliasing")