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CMake: Fix time.h checks not running on second CMake run.
If CMake was configured more than once, HAVE_CLOCK_GETTIME and HAVE_CLOCK_MONOTONIC would not be set as compile definitions. The check for librt being needed to provide HAVE_CLOCK_GETTIME was also simplified.
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1 changed files with 10 additions and 8 deletions
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@ -150,24 +150,26 @@ tuklib_integer(ALL)
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# Check for clock_gettime(). Do this before checking for threading so
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# that we know there if CLOCK_MONOTONIC is available.
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if(NOT WIN32 AND NOT DEFINED HAVE_CLOCK_GETTIME)
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if(NOT WIN32)
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check_symbol_exists(clock_gettime time.h HAVE_CLOCK_GETTIME)
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if(NOT HAVE_CLOCK_GETTIME)
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# With glibc <= 2.17 or Solaris 10 this needs librt.
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unset(HAVE_CLOCK_GETTIME CACHE)
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# Add librt for the next check for HAVE_CLOCK_GETTIME. If it is
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# found after including the library, we know that librt is required.
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list(INSERT CMAKE_REQUIRED_LIBRARIES 0 rt)
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check_symbol_exists(clock_gettime time.h HAVE_CLOCK_GETTIME)
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check_symbol_exists(clock_gettime time.h HAVE_CLOCK_GETTIME_LIBRT)
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# If it was found now, add it to all targets and keep it
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# in CMAKE_REQUIRED_LIBRARIES for further tests too.
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if(HAVE_CLOCK_GETTIME)
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# If it was found now, add librt to all targets and keep it in
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# CMAKE_REQUIRED_LIBRARIES for further tests too.
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if(HAVE_CLOCK_GETTIME_LIBRT)
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link_libraries(rt)
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else()
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list(REMOVE_AT CMAKE_REQUIRED_LIBRARIES 0)
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endif()
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endif()
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if(HAVE_CLOCK_GETTIME)
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if(HAVE_CLOCK_GETTIME OR HAVE_CLOCK_GETTIME_LIBRT)
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add_compile_definitions(HAVE_CLOCK_GETTIME)
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# Check if CLOCK_MONOTONIC is available for clock_gettime().
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