Commit | Line | Data |
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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 | ]) |