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| author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
|---|---|---|
| committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
| commit | 70e9163c9c18e995515598085cb824e554eb7ae7 (patch) | |
| tree | a42dc8b2a6c031354bf31472de888bfc8a060132 /m4/timer_time.m4 | |
| parent | cbf5993c43f49281173f185863577d86bfac6eae (diff) | |
| download | coreutils-tarball-master.tar.gz | |
coreutils-8.25HEADcoreutils-8.25master
Diffstat (limited to 'm4/timer_time.m4')
| -rw-r--r-- | m4/timer_time.m4 | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/m4/timer_time.m4 b/m4/timer_time.m4 new file mode 100644 index 0000000..114f92a --- /dev/null +++ b/m4/timer_time.m4 @@ -0,0 +1,44 @@ +# timer_time.m4 serial 3 +dnl Copyright (C) 2011-2016 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +# Check for timer_settime, and set LIB_TIMER_TIME. + +AC_DEFUN([gl_TIMER_TIME], +[ + dnl Based on clock_time.m4. See details there. + + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + + dnl Test whether the gnulib module 'threadlib' is in use. + dnl Some packages like Emacs use --avoid=threadlib. + dnl Write the symbol in such a way that it does not cause 'aclocal' to pick + dnl the threadlib.m4 file that is installed in $PREFIX/share/aclocal/. + m4_ifdef([gl_][THREADLIB], [AC_REQUIRE([gl_][THREADLIB])]) + + LIB_TIMER_TIME= + AC_SUBST([LIB_TIMER_TIME]) + gl_saved_libs=$LIBS + AC_SEARCH_LIBS([timer_settime], [rt posix4], + [test "$ac_cv_search_timer_settime" = "none required" || + LIB_TIMER_TIME=$ac_cv_search_timer_settime]) + m4_ifdef([gl_][THREADLIB], + [dnl GLIBC uses threads to emulate posix timers when kernel support + dnl is not available (like Linux < 2.6 or when used with kFreeBSD) + dnl Now the pthread lib is linked automatically in the normal case, + dnl but when linking statically, it needs to be explicitly specified. + AC_EGREP_CPP([Thread], + [#include <features.h> + #ifdef __GNU_LIBRARY__ + #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2) || (__GLIBC__ > 2)) \ + && !(__UCLIBC__ && __HAS_NO_THREADS__) + Thread emulation available + #endif + #endif + ], + [LIB_TIMER_TIME="$LIB_TIMER_TIME $LIBMULTITHREAD"])]) + AC_CHECK_FUNCS([timer_settime]) + LIBS=$gl_saved_libs +]) |