31e6f316db
There was a typo in the if condition which probably always made it true. Linking to to -lstdc++fs is needed until g++-9, see e.g. https://gitlab.kitware.com/cmake/cmake/issues/17834
100 lines
1.7 KiB
CMake
100 lines
1.7 KiB
CMake
# Check for various compiler extensions
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# HAVE_ATTRIBUTE_ALWAYS_INLINE True if attribute always inline is supported
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# HAS_ATTRIBUTE_UNUSED True if attribute unused is supported
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# HAS_ATTRIBUTE_DEPRECATED True if attribute deprecated is supported
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# HAS_ATTRIBUTE_DEPRECATED_MSG True if attribute deprecated("msg") is supported
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include(CheckCXXSourceCompiles)
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# __attribute__((always_inline))
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CHECK_CXX_SOURCE_COMPILES("
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void __attribute__((always_inline)) foo(void) {}
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int main(void)
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{
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foo();
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return 0;
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};
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" HAVE_ATTRIBUTE_ALWAYS_INLINE
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)
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# __attribute__((unused))
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CHECK_CXX_SOURCE_COMPILES("
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int main(void)
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{
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int __attribute__((unused)) foo;
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return 0;
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};
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" HAS_ATTRIBUTE_UNUSED
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)
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# __attribute__((deprecated))
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CHECK_CXX_SOURCE_COMPILES("
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#define DEP __attribute__((deprecated))
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class bar
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{
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bar() DEP;
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};
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class peng { } DEP;
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template <class T>
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class t_bar
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{
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t_bar() DEP;
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};
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template <class T>
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class t_peng {
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t_peng() {};
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} DEP;
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void foo() DEP;
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void foo() {};
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int main(void)
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{
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return 0;
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};
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" HAS_ATTRIBUTE_DEPRECATED
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)
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# __attribute__((deprecated("msg")))
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CHECK_CXX_SOURCE_COMPILES("
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#define DEP __attribute__((deprecated(\"message\")))
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class bar {
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bar() DEP;
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};
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class peng { } DEP;
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template <class T>
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class t_bar
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{
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t_bar() DEP;
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};
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template <class T>
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class t_peng
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{
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t_peng() {};
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} DEP;
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void foo() DEP;
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void foo() {};
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int main(void)
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{
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return 0;
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};
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" HAS_ATTRIBUTE_DEPRECATED_MSG
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)
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if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
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if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
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list(APPEND ${project}_LIBRARIES stdc++fs)
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endif()
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endif()
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