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FindQuadmath: add -fext-numeric-literals if the compiler supports it

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this is required for GCC >= 4.8 to support the 'Q' suffix for floating
point literals (which are used in the quadmath.h header)

In order to prevent compilers which eat the flag but do not support it
from complaining constantly, it is tested for with "-Werror" enabled...
This commit is contained in:
Andreas Lauser
2014-08-18 12:16:04 +02:00
parent a6c173abad
commit 38e0800047
1 changed files with 6 additions and 0 deletions
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6
cmake/Modules/FindQuadmath.cmake
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@@ -9,6 +9,12 @@
include(CheckCSourceCompiles)
include(CheckCXXSourceCompiles)
include(CMakePushCheckState)
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag("-Werror -fext-numeric-literals" HAVE_EXTENDED_NUMERIC_LITERALS)
if (HAVE_EXTENDED_NUMERIC_LITERALS)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fext-numeric-literals")
endif()
cmake_push_check_state()
list(APPEND CMAKE_REQUIRED_LIBRARIES "quadmath")