mirror of
https://git.mirrors.martin98.com/https://github.com/google/draco
synced 2025-04-21 21:30:01 +08:00
227c7be1af
- Stop forcing AS/C/CXX/LINKER flags into the cache.
- Don't cache internal build system variables.
- Fix usages of PARENT_SCOPE rendered incorrect by previous
patch.
- Fix usage of local variables within if() statements in macros;
functions appear to allow for omission of ${} around vars in
simple boolean checks. Macros apparently require ${} for all
usages of if().
125 lines
4.6 KiB
CMake
125 lines
4.6 KiB
CMake
if (NOT DRACO_CMAKE_COMPILER_TESTS_CMAKE_)
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set(DRACO_CMAKE_COMPILER_TESTS_CMAKE_ 1)
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include(CheckCSourceCompiles)
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include(CheckCXXSourceCompiles)
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# The basic main() macro used in all compile tests.
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set(DRACO_C_MAIN "\nint main(void) { return 0; }")
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set(DRACO_CXX_MAIN "\nint main() { return 0; }")
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# Strings containing the names of passed and failed tests.
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set(DRACO_C_PASSED_TESTS)
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set(DRACO_C_FAILED_TESTS)
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set(DRACO_CXX_PASSED_TESTS)
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set(DRACO_CXX_FAILED_TESTS)
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macro(draco_push_var var new_value)
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set(SAVED_${var} ${var})
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set(${var} ${new_value})
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endmacro ()
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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 $result_var is unset.
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# The test is not run if the test name is found in either of the passed or
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# failed test variables.
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macro(draco_check_c_compiles test_name test_source result_var)
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unset(C_TEST_PASSED CACHE)
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unset(C_TEST_FAILED CACHE)
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string(FIND "${DRACO_C_PASSED_TESTS}" "${test_name}" C_TEST_PASSED)
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string(FIND "${DRACO_C_FAILED_TESTS}" "${test_name}" C_TEST_FAILED)
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if (${C_TEST_PASSED} EQUAL -1 AND ${C_TEST_FAILED} EQUAL -1)
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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} ${C_TEST_COMPILED})
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if (${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}")
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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)
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else () # ${C_TEST_FAILED} NOT EQUAL -1
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unset(${result_var})
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endif ()
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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 $result_var is unset.
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# The test is not run if the test name is found in either of the passed or
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# failed test variables.
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macro(draco_check_cxx_compiles test_name test_source result_var)
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unset(CXX_TEST_PASSED CACHE)
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unset(CXX_TEST_FAILED CACHE)
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string(FIND "${DRACO_CXX_PASSED_TESTS}" "${test_name}" CXX_TEST_PASSED)
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string(FIND "${DRACO_CXX_FAILED_TESTS}" "${test_name}" CXX_TEST_FAILED)
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if (${CXX_TEST_PASSED} EQUAL -1 AND ${CXX_TEST_FAILED} EQUAL -1)
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unset(CXX_TEST_COMPILED CACHE)
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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} ${CXX_TEST_COMPILED})
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if (${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}")
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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)
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else () # ${CXX_TEST_FAILED} NOT EQUAL -1
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unset(${result_var})
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endif ()
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endmacro ()
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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 macro is intended to be used to write to result variables that
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# are expanded via configure_file(). $result_var is set to 1 or 0 to allow
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# direct usage of the value in generated source files.
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macro(draco_check_source_compiles test_name test_source result_var)
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unset(C_PASSED)
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unset(CXX_PASSED)
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draco_check_c_compiles(${test_name} ${test_source} C_PASSED)
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draco_check_cxx_compiles(${test_name} ${test_source} CXX_PASSED)
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if (${C_PASSED} AND ${CXX_PASSED})
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set(${result_var} 1)
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else ()
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set(${result_var} 0)
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endif ()
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endmacro ()
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# When inline support is detected for the current compiler the supported
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# inlining keyword is written to $result in caller scope.
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macro (draco_get_inline result)
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draco_check_source_compiles("inline_check_1"
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"static inline void macro(void) {}"
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HAVE_INLINE_1)
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if (HAVE_INLINE_1 EQUAL 1)
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set(${result} "inline")
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return()
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endif ()
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# Check __inline.
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draco_check_source_compiles("inline_check_2"
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"static __inline void macro(void) {}"
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HAVE_INLINE_2)
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if (HAVE_INLINE_2 EQUAL 1)
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set(${result} "__inline")
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endif ()
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endmacro ()
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endif () # DRACO_CMAKE_COMPILER_TESTS_CMAKE_
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