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CMakeFeatureDetect.cmake

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#-------------------------------------------------------------------------------------------------------

# Copyright (C) Microsoft. All rights reserved.

# Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.

#-------------------------------------------------------------------------------------------------------

include(CheckCXXSourceCompiles)

include(CheckCXXSourceRuns)

if(CC_TARGET_OS_OSX)

# by default this is disabled for osx

# enable temporarily

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} \

-Werror"

)

endif()

check_cxx_source_runs("

#include <stdlib.h>

#include <stdio.h>

__attribute__((disable_tail_calls))

int inc(int a) { return a + 1; }

int main(int argc, char **argv) {

printf(\"%d\", inc(argc + 1));

exit(0);

}" CLANG_HAS_DISABLE_TAIL_CALLS_CFG)

if(CLANG_HAS_DISABLE_TAIL_CALLS_CFG STREQUAL 1)

add_definitions(-DCLANG_HAS_DISABLE_TAIL_CALLS=1)

set(CXX_DO_NOT_OPTIMIZE_SIBLING_CALLS "")

else()

set(CXX_DO_NOT_OPTIMIZE_SIBLING_CALLS "-fno-optimize-sibling-calls")

endif()

if(CC_TARGET_OS_OSX)

# by default this is disabled for osx

# disable back

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} \

-Wno-error"

)

endif()