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Check whether -Wno-unused-but-set-variable is supported before using

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it. It seems to only be available on recent (>=4.6) versions of gcc.
This commit is contained in:
Dmitry Marakasov 2011-08-01 22:17:32 +04:00
parent 9017c51e7f
commit 318a730c45
1 changed files with 6 additions and 1 deletions
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7
src/CMakeLists.txt
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@ -209,6 +209,8 @@ endif(BUILD_SERVER)
# Set some optimizations and tweaks
#
include(CheckCCompilerFlag)
if(MSVC)
# Visual Studio
@ -236,7 +238,10 @@ else()
endif()
if(NOT APPLE)
set(WARNING_FLAGS "${WARNING_FLAGS} -Wno-unused-but-set-variable")
check_c_compiler_flag("-Wno-unused-but-set-variable" HAS_UNUSED_BUT_SET_VARIABLE_WARNING)
if(HAS_UNUSED_BUT_SET_VARIABLE_WARNING)
set(WARNING_FLAGS "${WARNING_FLAGS} -Wno-unused-but-set-variable")
endif(HAS_UNUSED_BUT_SET_VARIABLE_WARNING)
endif()
if(APPLE)