mirror of
https://git.mirrors.martin98.com/https://github.com/google/draco
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Merge pull request #320 from google/cmake_up
Improve CMake C/CXX/AS flag handling.
This commit is contained in:
tomfinegan
GitHub
commit
10be65c807
@ -12,7 +12,7 @@ set(DRACO_FAILED_CXX_FLAGS)
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# Checks C compiler for support of $c_flag. Adds $c_flag to $CMAKE_C_FLAGS when
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# the compile test passes. Caches $c_flag in $DRACO_FAILED_C_FLAGS when the test
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# fails.
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function (add_c_flag_if_supported c_flag)
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macro (add_c_flag_if_supported c_flag)
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unset(C_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
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unset(C_FLAG_FAILED CACHE)
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@ -22,19 +22,19 @@ function (add_c_flag_if_supported c_flag)
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unset(C_FLAG_SUPPORTED CACHE)
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message("Checking C compiler flag support for: " ${c_flag})
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check_c_compiler_flag("${c_flag}" C_FLAG_SUPPORTED)
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if (C_FLAG_SUPPORTED)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${c_flag}" CACHE STRING "" FORCE)
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if (${C_FLAG_SUPPORTED})
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${c_flag}" CACHE STRING "")
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else ()
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set(DRACO_FAILED_C_FLAGS "${DRACO_FAILED_C_FLAGS} ${c_flag}" CACHE STRING
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"" FORCE)
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"")
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endif ()
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endif ()
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endfunction ()
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endmacro ()
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# Checks C++ compiler for support of $cxx_flag. Adds $cxx_flag to
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# $CMAKE_CXX_FLAGS when the compile test passes. Caches $c_flag in
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# $DRACO_FAILED_CXX_FLAGS when the test fails.
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function (add_cxx_flag_if_supported cxx_flag)
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macro (add_cxx_flag_if_supported cxx_flag)
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unset(CXX_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
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unset(CXX_FLAG_FAILED CACHE)
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@ -44,26 +44,25 @@ function (add_cxx_flag_if_supported cxx_flag)
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unset(CXX_FLAG_SUPPORTED CACHE)
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message("Checking CXX compiler flag support for: " ${cxx_flag})
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check_cxx_compiler_flag("${cxx_flag}" CXX_FLAG_SUPPORTED)
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if (CXX_FLAG_SUPPORTED)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${cxx_flag}" CACHE STRING ""
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FORCE)
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if (${CXX_FLAG_SUPPORTED})
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${cxx_flag}" CACHE STRING "")
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else()
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set(DRACO_FAILED_CXX_FLAGS "${DRACO_FAILED_CXX_FLAGS} ${cxx_flag}" CACHE
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STRING "" FORCE)
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STRING "")
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endif ()
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endif ()
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endfunction ()
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endmacro ()
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# Convenience method for adding a flag to both the C and C++ compiler command
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# lines.
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function (add_compiler_flag_if_supported flag)
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macro (add_compiler_flag_if_supported flag)
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add_c_flag_if_supported(${flag})
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add_cxx_flag_if_supported(${flag})
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endfunction ()
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endmacro ()
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# Checks C compiler for support of $c_flag and terminates generation when
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# support is not present.
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function (require_c_flag c_flag update_c_flags)
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macro (require_c_flag c_flag update_c_flags)
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unset(C_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
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@ -71,19 +70,19 @@ function (require_c_flag c_flag update_c_flags)
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unset(HAVE_C_FLAG CACHE)
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message("Checking C compiler flag support for: " ${c_flag})
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check_c_compiler_flag("${c_flag}" HAVE_C_FLAG)
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if (NOT HAVE_C_FLAG)
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if (NOT ${HAVE_C_FLAG})
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message(FATAL_ERROR
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"${PROJECT_NAME} requires support for C flag: ${c_flag}.")
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endif ()
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if (update_c_flags)
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set(CMAKE_C_FLAGS "${c_flag} ${CMAKE_C_FLAGS}" CACHE STRING "" FORCE)
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if (${update_c_flags})
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set(CMAKE_C_FLAGS "${c_flag} ${CMAKE_C_FLAGS}")
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endif ()
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endif ()
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endfunction ()
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endmacro ()
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# Checks CXX compiler for support of $cxx_flag and terminates generation when
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# support is not present.
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function (require_cxx_flag cxx_flag update_cxx_flags)
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macro (require_cxx_flag cxx_flag update_cxx_flags)
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unset(CXX_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
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@ -91,125 +90,121 @@ function (require_cxx_flag cxx_flag update_cxx_flags)
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unset(HAVE_CXX_FLAG CACHE)
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message("Checking CXX compiler flag support for: " ${cxx_flag})
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check_cxx_compiler_flag("${cxx_flag}" HAVE_CXX_FLAG)
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if (NOT HAVE_CXX_FLAG)
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if (NOT ${HAVE_CXX_FLAG})
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message(FATAL_ERROR
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"${PROJECT_NAME} requires support for CXX flag: ${cxx_flag}.")
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endif ()
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if (update_cxx_flags)
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set(CMAKE_CXX_FLAGS "${cxx_flag} ${CMAKE_CXX_FLAGS}" CACHE STRING ""
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FORCE)
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if (${update_cxx_flags})
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set(CMAKE_CXX_FLAGS "${cxx_flag} ${CMAKE_CXX_FLAGS}")
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endif ()
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endif ()
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endfunction ()
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endmacro ()
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# Checks for support of $flag by both the C and CXX compilers. Terminates
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# generation when support is not present in both compilers.
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function (require_compiler_flag flag update_cmake_flags)
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macro (require_compiler_flag flag update_cmake_flags)
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require_c_flag(${flag} ${update_cmake_flags})
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require_cxx_flag(${flag} ${update_cmake_flags})
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endfunction ()
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endmacro ()
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# Checks only non-MSVC targets for support of $c_flag and terminates generation
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# when support is not present.
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function (require_c_flag_nomsvc c_flag update_c_flags)
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macro (require_c_flag_nomsvc c_flag update_c_flags)
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if (NOT MSVC)
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require_c_flag(${c_flag} ${update_c_flags})
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endif ()
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endfunction ()
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endmacro ()
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# Checks only non-MSVC targets for support of $cxx_flag and terminates
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# generation when support is not present.
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function (require_cxx_flag_nomsvc cxx_flag update_cxx_flags)
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macro (require_cxx_flag_nomsvc cxx_flag update_cxx_flags)
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if (NOT MSVC)
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require_cxx_flag(${cxx_flag} ${update_cxx_flags})
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endif ()
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endfunction ()
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endmacro ()
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# Checks only non-MSVC targets for support of $flag by both the C and CXX
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# compilers. Terminates generation when support is not present in both
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# compilers.
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function (require_compiler_flag_nomsvc flag update_cmake_flags)
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macro (require_compiler_flag_nomsvc flag update_cmake_flags)
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require_c_flag_nomsvc(${flag} ${update_cmake_flags})
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require_cxx_flag_nomsvc(${flag} ${update_cmake_flags})
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endfunction ()
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endmacro ()
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# Adds $preproc_def to C compiler command line (as -D$preproc_def) if not
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# already present.
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function (add_c_preproc_definition preproc_def)
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macro (add_c_preproc_definition preproc_def)
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unset(PREPROC_DEF_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${preproc_def}" PREPROC_DEF_FOUND)
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if (${PREPROC_DEF_FOUND} EQUAL -1)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D${preproc_def}" CACHE STRING ""
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FORCE)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D${preproc_def}")
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endif ()
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endfunction ()
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endmacro ()
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# Adds $preproc_def to CXX compiler command line (as -D$preproc_def) if not
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# already present.
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function (add_cxx_preproc_definition preproc_def)
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macro (add_cxx_preproc_definition preproc_def)
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unset(PREPROC_DEF_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${preproc_def}" PREPROC_DEF_FOUND)
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if (${PREPROC_DEF_FOUND} EQUAL -1)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D${preproc_def}" CACHE STRING ""
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FORCE)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D${preproc_def}")
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endif ()
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endfunction ()
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endmacro ()
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# Adds $preproc_def to C and CXX compiler command line (as -D$preproc_def) if
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# not already present.
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function (add_preproc_definition preproc_def)
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macro (add_preproc_definition preproc_def)
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add_c_preproc_definition(${preproc_def})
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add_cxx_preproc_definition(${preproc_def})
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endfunction ()
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endmacro ()
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# Adds $flag to assembler command line.
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function (append_as_flag flag)
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macro (append_as_flag flag)
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unset(AS_FLAG_FOUND CACHE)
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string(FIND "${DRACO_AS_FLAGS}" "${flag}" AS_FLAG_FOUND)
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if (${AS_FLAG_FOUND} EQUAL -1)
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set(DRACO_AS_FLAGS "${DRACO_AS_FLAGS} ${flag}" CACHE STRING "" FORCE)
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set(DRACO_AS_FLAGS "${DRACO_AS_FLAGS} ${flag}")
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endif ()
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endfunction ()
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endmacro ()
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# Adds $flag to the C compiler command line.
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function (append_c_flag flag)
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macro (append_c_flag flag)
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unset(C_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${flag}" C_FLAG_FOUND)
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if (${C_FLAG_FOUND} EQUAL -1)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" CACHE STRING "" FORCE)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}")
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endif ()
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endfunction ()
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endmacro ()
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# Adds $flag to the CXX compiler command line.
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function (append_cxx_flag flag)
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macro (append_cxx_flag flag)
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unset(CXX_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${flag}" CXX_FLAG_FOUND)
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if (${CXX_FLAG_FOUND} EQUAL -1)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" CACHE STRING "" FORCE)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
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endif ()
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endfunction ()
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endmacro ()
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# Adds $flag to the C and CXX compiler command lines.
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function (append_compiler_flag flag)
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macro (append_compiler_flag flag)
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append_c_flag(${flag})
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append_cxx_flag(${flag})
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endfunction ()
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endmacro ()
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# Adds $flag to the executable linker command line.
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function (append_exe_linker_flag flag)
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macro (append_exe_linker_flag flag)
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unset(LINKER_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_EXE_LINKER_FLAGS}" "${flag}" LINKER_FLAG_FOUND)
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if (${LINKER_FLAG_FOUND} EQUAL -1)
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${flag}" CACHE STRING
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"" FORCE)
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${flag}")
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endif ()
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endfunction ()
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endmacro ()
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# Adds $flag to the link flags for $target.
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function (append_link_flag_to_target target flags)
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@ -233,7 +228,7 @@ function (append_link_flag_to_target target flags)
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endfunction ()
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# Adds $flag to executable linker flags, and makes sure C/CXX builds still work.
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function (require_linker_flag flag)
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macro (require_linker_flag flag)
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append_exe_linker_flag(${flag})
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unset(c_passed)
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@ -244,6 +239,6 @@ function (require_linker_flag flag)
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if (NOT c_passed OR NOT cxx_passed)
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message(FATAL_ERROR "Linker flag test for ${flag} failed.")
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endif ()
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endfunction ()
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endmacro ()
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endif () # DRACO_CMAKE_COMPILER_FLAGS_CMAKE_
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@ -4,7 +4,7 @@ set(DRACO_CMAKE_COMPILER_TESTS_CMAKE_ 1)
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include(CheckCSourceCompiles)
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include(CheckCXXSourceCompiles)
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# The basic main() function used in all compile tests.
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# The basic main() macro used in all compile tests.
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set(DRACO_C_MAIN "\nint main(void) { return 0; }")
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set(DRACO_CXX_MAIN "\nint main() { return 0; }")
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@ -14,22 +14,22 @@ set(DRACO_C_FAILED_TESTS)
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set(DRACO_CXX_PASSED_TESTS)
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set(DRACO_CXX_FAILED_TESTS)
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function(draco_push_var var new_value)
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set(SAVED_${var} ${var} PARENT_SCOPE)
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set(${var} ${new_value} PARENT_SCOPE)
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endfunction ()
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macro(draco_push_var var new_value)
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set(SAVED_${var} ${var})
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set(${var} ${new_value})
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endmacro ()
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function(draco_pop_var var)
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set(var ${SAVED_${var}} PARENT_SCOPE)
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unset(SAVED_${var} PARENT_SCOPE)
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endfunction ()
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macro(draco_pop_var var)
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set(var ${SAVED_${var}})
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unset(SAVED_${var})
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endmacro ()
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# Confirms $test_source compiles and stores $test_name in one of
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# $DRACO_C_PASSED_TESTS or $DRACO_C_FAILED_TESTS depending on out come. When the
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# test passes $result_var is set to 1. When it fails $result_var is unset.
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# The test is not run if the test name is found in either of the passed or
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# failed test variables.
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function(draco_check_c_compiles test_name test_source result_var)
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macro(draco_check_c_compiles test_name test_source result_var)
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unset(C_TEST_PASSED CACHE)
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unset(C_TEST_FAILED CACHE)
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string(FIND "${DRACO_C_PASSED_TESTS}" "${test_name}" C_TEST_PASSED)
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@ -38,29 +38,27 @@ function(draco_check_c_compiles test_name test_source result_var)
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unset(C_TEST_COMPILED CACHE)
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message("Running C compiler test: ${test_name}")
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check_c_source_compiles("${test_source} ${DRACO_C_MAIN}" C_TEST_COMPILED)
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set(${result_var} ${C_TEST_COMPILED} PARENT_SCOPE)
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set(${result_var} ${C_TEST_COMPILED})
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if (C_TEST_COMPILED)
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set(DRACO_C_PASSED_TESTS "${DRACO_C_PASSED_TESTS} ${test_name}" CACHE
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STRING "" FORCE)
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if (${C_TEST_COMPILED})
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set(DRACO_C_PASSED_TESTS "${DRACO_C_PASSED_TESTS} ${test_name}")
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else ()
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set(DRACO_C_FAILED_TESTS "${DRACO_C_FAILED_TESTS} ${test_name}" CACHE
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STRING "" FORCE)
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set(DRACO_C_FAILED_TESTS "${DRACO_C_FAILED_TESTS} ${test_name}")
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message("C Compiler test ${test_name} failed.")
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endif ()
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elseif (NOT ${C_TEST_PASSED} EQUAL -1)
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set(${result_var} 1 PARENT_SCOPE)
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set(${result_var} 1)
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else () # ${C_TEST_FAILED} NOT EQUAL -1
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unset(${result_var} PARENT_SCOPE)
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unset(${result_var})
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endif ()
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endfunction ()
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endmacro ()
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# Confirms $test_source compiles and stores $test_name in one of
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# $DRACO_CXX_PASSED_TESTS or $DRACO_CXX_FAILED_TESTS depending on out come. When
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# the test passes $result_var is set to 1. When it fails $result_var is unset.
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# The test is not run if the test name is found in either of the passed or
|
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# failed test variables.
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function(draco_check_cxx_compiles test_name test_source result_var)
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macro(draco_check_cxx_compiles test_name test_source result_var)
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unset(CXX_TEST_PASSED CACHE)
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unset(CXX_TEST_FAILED CACHE)
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string(FIND "${DRACO_CXX_PASSED_TESTS}" "${test_name}" CXX_TEST_PASSED)
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@ -70,59 +68,57 @@ function(draco_check_cxx_compiles test_name test_source result_var)
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message("Running CXX compiler test: ${test_name}")
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check_cxx_source_compiles("${test_source} ${DRACO_CXX_MAIN}"
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CXX_TEST_COMPILED)
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set(${result_var} ${CXX_TEST_COMPILED} PARENT_SCOPE)
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set(${result_var} ${CXX_TEST_COMPILED})
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if (CXX_TEST_COMPILED)
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set(DRACO_CXX_PASSED_TESTS "${DRACO_CXX_PASSED_TESTS} ${test_name}" CACHE
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STRING "" FORCE)
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if (${CXX_TEST_COMPILED})
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set(DRACO_CXX_PASSED_TESTS "${DRACO_CXX_PASSED_TESTS} ${test_name}")
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else ()
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set(DRACO_CXX_FAILED_TESTS "${DRACO_CXX_FAILED_TESTS} ${test_name}" CACHE
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STRING "" FORCE)
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set(DRACO_CXX_FAILED_TESTS "${DRACO_CXX_FAILED_TESTS} ${test_name}")
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message("CXX Compiler test ${test_name} failed.")
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endif ()
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elseif (NOT ${CXX_TEST_PASSED} EQUAL -1)
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set(${result_var} 1 PARENT_SCOPE)
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set(${result_var} 1)
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else () # ${CXX_TEST_FAILED} NOT EQUAL -1
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unset(${result_var} PARENT_SCOPE)
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unset(${result_var})
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endif ()
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endfunction ()
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endmacro ()
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# Convenience function that confirms $test_source compiles as C and C++.
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# Convenience macro that confirms $test_source compiles as C and C++.
|
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# $result_var is set to 1 when both tests are successful, and 0 when one or both
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# tests fail.
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# Note: This function is intended to be used to write to result variables that
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# Note: This macro is intended to be used to write to result variables that
|
||||
# are expanded via configure_file(). $result_var is set to 1 or 0 to allow
|
||||
# direct usage of the value in generated source files.
|
||||
function(draco_check_source_compiles test_name test_source result_var)
|
||||
macro(draco_check_source_compiles test_name test_source result_var)
|
||||
unset(C_PASSED)
|
||||
unset(CXX_PASSED)
|
||||
draco_check_c_compiles(${test_name} ${test_source} C_PASSED)
|
||||
draco_check_cxx_compiles(${test_name} ${test_source} CXX_PASSED)
|
||||
if (C_PASSED AND CXX_PASSED)
|
||||
set(${result_var} 1 PARENT_SCOPE)
|
||||
if (${C_PASSED} AND ${CXX_PASSED})
|
||||
set(${result_var} 1)
|
||||
else ()
|
||||
set(${result_var} 0 PARENT_SCOPE)
|
||||
set(${result_var} 0)
|
||||
endif ()
|
||||
endfunction ()
|
||||
endmacro ()
|
||||
|
||||
# When inline support is detected for the current compiler the supported
|
||||
# inlining keyword is written to $result in caller scope.
|
||||
function (draco_get_inline result)
|
||||
macro (draco_get_inline result)
|
||||
draco_check_source_compiles("inline_check_1"
|
||||
"static inline void function(void) {}"
|
||||
"static inline void macro(void) {}"
|
||||
HAVE_INLINE_1)
|
||||
if (HAVE_INLINE_1 EQUAL 1)
|
||||
set(${result} "inline" PARENT_SCOPE)
|
||||
set(${result} "inline")
|
||||
return()
|
||||
endif ()
|
||||
|
||||
# Check __inline.
|
||||
draco_check_source_compiles("inline_check_2"
|
||||
"static __inline void function(void) {}"
|
||||
"static __inline void macro(void) {}"
|
||||
HAVE_INLINE_2)
|
||||
if (HAVE_INLINE_2 EQUAL 1)
|
||||
set(${result} "__inline" PARENT_SCOPE)
|
||||
set(${result} "__inline")
|
||||
endif ()
|
||||
endfunction ()
|
||||
endmacro ()
|
||||
|
||||
endif () # DRACO_CMAKE_COMPILER_TESTS_CMAKE_
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user