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Enable C99 explicitly with CMake where available

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This enables compilation as C99 where supported by the compiler.
A workaround with per-compiler hardcoded flags is used for CMake 3.0,
which does not support the C_STANDARD target property.

Fixes #1560.
Closes #1576.

(cherry picked from commit 8f852e0833)
This commit is contained in:
Guillaume Racicot 2019-09-05 09:47:49 -04:00 committed by Camilla Löwy
parent 4a62820646
commit 3f0390b827
1 changed files with 10 additions and 0 deletions
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10
src/CMakeLists.txt
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@ -100,6 +100,16 @@ set_target_properties(glfw PROPERTIES
POSITION_INDEPENDENT_CODE ON
FOLDER "GLFW3")
if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.1.0")
set_target_properties(glfw PROPERTIES C_STANDARD 99)
else()
# Remove this fallback when removing support for CMake version less than 3.1
target_compile_options(glfw PRIVATE
"$<$<C_COMPILER_ID:AppleClang>:-std=c99>"
"$<$<C_COMPILER_ID:Clang>:-std=c99>>"
"$<$<C_COMPILER_ID:GNU>:-std=c99>>")
endif()
target_compile_definitions(glfw PRIVATE _GLFW_USE_CONFIG_H)
target_include_directories(glfw PUBLIC
"$<BUILD_INTERFACE:${GLFW_SOURCE_DIR}/include>"