HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| a615a3ae | 1 | # timer_time.m4 serial 2 |
| ab422c4d | 2 | dnl Copyright (C) 2011-2013 Free Software Foundation, Inc. |
| a615a3ae PE |
3 | dnl This file is free software; the Free Software Foundation |
| 4 | dnl gives unlimited permission to copy and/or distribute it, | |
| 5 | dnl with or without modifications, as long as this notice is preserved. | |
| 6 | ||
| 7 | # Check for timer_settime, and set LIB_TIMER_TIME. | |
| 8 | ||
| 9 | AC_DEFUN([gl_TIMER_TIME], | |
| 10 | [ | |
| 11 | dnl Based on clock_time.m4. See details there. | |
| 12 | ||
| 13 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) | |
| 14 | AC_REQUIRE([gl_THREADLIB]) | |
| 15 | ||
| 16 | LIB_TIMER_TIME= | |
| 17 | AC_SUBST([LIB_TIMER_TIME]) | |
| 18 | gl_saved_libs=$LIBS | |
| 19 | AC_SEARCH_LIBS([timer_settime], [rt posix4], | |
| 20 | [test "$ac_cv_search_timer_settime" = "none required" || | |
| 21 | LIB_TIMER_TIME=$ac_cv_search_timer_settime]) | |
| 22 | dnl GLIBC uses threads to emulate posix timers when kernel support | |
| 23 | dnl is not available (like Linux < 2.6 or when used with kFreeBSD) | |
| 24 | dnl Now the pthread lib is linked automatically in the normal case, | |
| 25 | dnl but when linking statically, it needs to be explicitly specified. | |
| 26 | AC_EGREP_CPP([Thread], | |
| 27 | [ | |
| 28 | #include <features.h> | |
| 29 | #ifdef __GNU_LIBRARY__ | |
| 30 | #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2) || (__GLIBC__ > 2)) \ | |
| 31 | && !defined __UCLIBC__ | |
| 32 | Thread emulation available | |
| 33 | #endif | |
| 34 | #endif | |
| 35 | ], | |
| 36 | [LIB_TIMER_TIME="$LIB_TIMER_TIME $LIBMULTITHREAD"]) | |
| 37 | AC_CHECK_FUNCS([timer_settime]) | |
| 38 | LIBS=$gl_saved_libs | |
| 39 | ]) |