diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/ChangeLog | 9 | ||||
| -rw-r--r-- | m4/nanosleep.m4 | 32 |
2 files changed, 25 insertions, 16 deletions
diff --git a/m4/ChangeLog b/m4/ChangeLog index c984e9bb9..fa7bd23eb 100644 --- a/m4/ChangeLog +++ b/m4/ChangeLog @@ -1,3 +1,12 @@ +2006-05-19 Paul Eggert <eggert@cs.ucla.edu> + + * nanosleep.m4 (gl_FUNC_NANOSLEEP): Rename cache variables to use + gl_ rather than jm_. Link, don't run, so that cross-compiles are + allowed. Check that resulting type is arithmetic. Move AC_REQUIRE + and AC_CHECK_HEADERS_ONCE outside of AC_CACHE_CHECK, since they're + not really conditional on the cache. + (gl_PREREQ_NANOSLEEP): Check for sys/select.h. + 2006-05-14 Paul Eggert <eggert@cs.ucla.edu> * stdbool.m4 (AC_HEADER_STDBOOL): Fix overly-picky diff --git a/m4/nanosleep.m4 b/m4/nanosleep.m4 index 98495e0d1..56c66bbb9 100644 --- a/m4/nanosleep.m4 +++ b/m4/nanosleep.m4 @@ -1,4 +1,4 @@ -#serial 16 +#serial 17 dnl From Jim Meyering. dnl Check for the nanosleep function. @@ -16,6 +16,12 @@ AC_DEFUN([gl_FUNC_NANOSLEEP], [ AC_LIBSOURCES([nanosleep.c]) + dnl Persuade glibc and Solaris <time.h> to declare nanosleep. + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + + AC_REQUIRE([AC_HEADER_TIME]) + AC_CHECK_HEADERS_ONCE(sys/time.h) + nanosleep_save_libs=$LIBS # Solaris 2.5.1 needs -lposix4 to get the nanosleep function. @@ -25,15 +31,10 @@ AC_DEFUN([gl_FUNC_NANOSLEEP], LIB_NANOSLEEP=$ac_cv_search_nanosleep]) AC_SUBST([LIB_NANOSLEEP]) - AC_CACHE_CHECK([whether nanosleep works], - jm_cv_func_nanosleep_works, + AC_CACHE_CHECK([for nanosleep], + [gl_cv_func_nanosleep], [ - dnl Persuade glibc and Solaris <time.h> to declare nanosleep. - AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) - - AC_REQUIRE([AC_HEADER_TIME]) - AC_CHECK_HEADERS_ONCE(sys/time.h) - AC_TRY_RUN([ + AC_LINK_IFELSE([AC_LANG_SOURCE([[ # if TIME_WITH_SYS_TIME # include <sys/time.h> # include <time.h> @@ -51,15 +52,13 @@ AC_DEFUN([gl_FUNC_NANOSLEEP], struct timespec ts_sleep, ts_remaining; ts_sleep.tv_sec = 0; ts_sleep.tv_nsec = 1; - return nanosleep (&ts_sleep, &ts_remaining) != 0; + return nanosleep (&ts_sleep, &ts_remaining) < 0; } - ], - jm_cv_func_nanosleep_works=yes, - jm_cv_func_nanosleep_works=no, - dnl When crosscompiling, assume the worst. - jm_cv_func_nanosleep_works=no) + ]])], + [gl_cv_func_nanosleep=yes], + [gl_cv_func_nanosleep=no]) ]) - if test $jm_cv_func_nanosleep_works = no; then + if test $gl_cv_func_nanosleep = no; then AC_LIBOBJ(nanosleep) AC_DEFINE(nanosleep, rpl_nanosleep, [Define to rpl_nanosleep if the replacement function should be used.]) @@ -73,4 +72,5 @@ AC_DEFUN([gl_FUNC_NANOSLEEP], AC_DEFUN([gl_PREREQ_NANOSLEEP], [ AC_CHECK_FUNCS_ONCE(siginterrupt) + AC_CHECK_HEADERS_ONCE(sys/select.h) ]) |