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65 lines
1.5 KiB
Plaintext
65 lines
1.5 KiB
Plaintext
#serial 10
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dnl From Jim Meyering.
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dnl Check for the nanosleep function.
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dnl If not found, use the supplied replacement.
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dnl
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AC_DEFUN([gl_FUNC_NANOSLEEP],
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[
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nanosleep_save_libs=$LIBS
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# Solaris 2.5.1 needs -lposix4 to get the nanosleep function.
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# Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
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AC_SEARCH_LIBS([nanosleep], [rt posix4],
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[test "$ac_cv_search_nanosleep" = "none required" ||
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LIB_NANOSLEEP=$ac_cv_search_nanosleep])
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AC_SUBST([LIB_NANOSLEEP])
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AC_CACHE_CHECK([whether nanosleep works],
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jm_cv_func_nanosleep_works,
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[
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AC_REQUIRE([AC_HEADER_TIME])
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AC_CHECK_HEADERS_ONCE(sys/time.h)
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AC_TRY_RUN([
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# if TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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# else
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# if HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# include <time.h>
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# endif
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# endif
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int
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main ()
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{
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struct timespec ts_sleep, ts_remaining;
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ts_sleep.tv_sec = 0;
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ts_sleep.tv_nsec = 1;
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exit (nanosleep (&ts_sleep, &ts_remaining) == 0 ? 0 : 1);
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}
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],
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jm_cv_func_nanosleep_works=yes,
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jm_cv_func_nanosleep_works=no,
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dnl When crosscompiling, assume the worst.
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jm_cv_func_nanosleep_works=no)
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])
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if test $jm_cv_func_nanosleep_works = no; then
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AC_LIBOBJ(nanosleep)
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AC_DEFINE(nanosleep, rpl_nanosleep,
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[Define to rpl_nanosleep if the replacement function should be used.])
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gl_PREREQ_NANOSLEEP
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fi
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LIBS=$nanosleep_save_libs
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])
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# Prerequisites of lib/nanosleep.c.
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AC_DEFUN([gl_PREREQ_NANOSLEEP],
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[
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AC_CHECK_HEADERS_ONCE(unistd.h)
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])
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