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libgo: Check whether we need -lrt for sched_yield.

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From Rainer Orth.

From-SVN: r168816
This commit is contained in:
Ian Lance Taylor 2011-01-14 19:18:38 +00:00
parent 3ad3790dc0
commit ed4ebabc90
2 changed files with 60 additions and 0 deletions
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57
libgo/configure vendored
View File

@ -13635,6 +13635,63 @@ fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing sched_yield" >&5
$as_echo_n "checking for library containing sched_yield... " >&6; }
if test "${ac_cv_search_sched_yield+set}" = set; then :
$as_echo_n "(cached) " >&6
else
ac_func_search_save_LIBS=$LIBS
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
/* Override any GCC internal prototype to avoid an error.
Use char because int might match the return type of a GCC
builtin and then its argument prototype would still apply. */
#ifdef __cplusplus
extern "C"
#endif
char sched_yield ();
int
main ()
{
return sched_yield ();
;
return 0;
}
_ACEOF
for ac_lib in '' rt; do
if test -z "$ac_lib"; then
ac_res="none required"
else
ac_res=-l$ac_lib
LIBS="-l$ac_lib $ac_func_search_save_LIBS"
fi
if ac_fn_c_try_link "$LINENO"; then :
ac_cv_search_sched_yield=$ac_res
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext
if test "${ac_cv_search_sched_yield+set}" = set; then :
break
fi
done
if test "${ac_cv_search_sched_yield+set}" = set; then :
else
ac_cv_search_sched_yield=no
fi
rm conftest.$ac_ext
LIBS=$ac_func_search_save_LIBS
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_sched_yield" >&5
$as_echo "$ac_cv_search_sched_yield" >&6; }
ac_res=$ac_cv_search_sched_yield
if test "$ac_res" != no; then :
test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether byte ordering is bigendian" >&5
$as_echo_n "checking whether byte ordering is bigendian... " >&6; }
if test "${ac_cv_c_bigendian+set}" = set; then :

3
libgo/configure.ac
View File

@ -274,6 +274,9 @@ PTHREAD_LIBS=
AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
AC_SUBST(PTHREAD_LIBS)
dnl Test if -lrt is required for sched_yield.
AC_SEARCH_LIBS([sched_yield], [rt])
AC_C_BIGENDIAN
GCC_CHECK_UNWIND_GETIPINFO