diff options
Diffstat (limited to 'erts/aclocal.m4')
| -rw-r--r-- | erts/aclocal.m4 | 69 |
1 files changed, 60 insertions, 9 deletions
diff --git a/erts/aclocal.m4 b/erts/aclocal.m4 index 013bfe5652..6c0544da31 100644 --- a/erts/aclocal.m4 +++ b/erts/aclocal.m4 @@ -736,10 +736,23 @@ AC_DEFUN(ERL_MONOTONIC_CLOCK, ;; esac + clock_gettime_lib="" + AC_CHECK_LIB(rt, clock_gettime, [clock_gettime_lib="-lrt"]) + + save_LIBS="$LIBS" + LIBS="$LIBS $clock_gettime_lib" + + if test "$LD_MAY_BE_WEAK" != "no"; then + trust_test="#error May not be there due to weak linking" + else + trust_test="" + fi + AC_CACHE_CHECK([for clock_gettime(CLOCK_MONOTONIC_RAW, _)], erl_cv_clock_gettime_monotonic_raw, [ - AC_TRY_COMPILE([ + AC_TRY_LINK([ #include <time.h> +$trust_test ], [ struct timespec ts; @@ -755,8 +768,9 @@ AC_DEFUN(ERL_MONOTONIC_CLOCK, AC_CACHE_CHECK([for clock_gettime() with ${check_msg}monotonic clock type], erl_cv_clock_gettime_monotonic_$1, [ for clock_type in $prefer_resolution_clock_gettime_monotonic $default_resolution_clock_gettime_monotonic $high_resolution_clock_gettime_monotonic $low_resolution_clock_gettime_monotonic; do - AC_TRY_COMPILE([ + AC_TRY_LINK([ #include <time.h> +$trust_test ], [ struct timespec ts; @@ -771,7 +785,15 @@ AC_DEFUN(ERL_MONOTONIC_CLOCK, done ]) - AC_CHECK_FUNCS([clock_getres clock_get_attributes gethrtime]) + LIBS="$save_LIBS" + + if test "$LD_MAY_BE_WEAK" != "no"; then + check_for_clock_getres= + else + check_for_clock_getres=clock_getres + fi + + AC_CHECK_FUNCS([$check_for_clock_getres clock_get_attributes gethrtime]) AC_CACHE_CHECK([for mach clock_get_time() with monotonic clock type], erl_cv_mach_clock_get_time_monotonic, [ @@ -840,7 +862,7 @@ AC_DEFUN(ERL_MONOTONIC_CLOCK, break fi done - AC_CHECK_LIB(rt, clock_gettime, [erl_monotonic_clock_lib="-lrt"]) + erl_monotonic_clock_lib=$clock_gettime_lib ;; mach_clock_get_time) erl_monotonic_clock_id=SYSTEM_CLOCK @@ -879,11 +901,24 @@ AC_DEFUN(ERL_WALL_CLOCK, ;; esac + clock_gettime_lib="" + AC_CHECK_LIB(rt, clock_gettime, [clock_gettime_lib="-lrt"]) + + save_LIBS="$LIBS" + LIBS="$LIBS $clock_gettime_lib" + + if test "$LD_MAY_BE_WEAK" != "no"; then + trust_test="#error May not be there due to weak linking" + else + trust_test="" + fi + AC_CACHE_CHECK([for clock_gettime() with ${check_msg}wall clock type], erl_cv_clock_gettime_wall_$1, [ for clock_type in $prefer_resolution_clock_gettime_wall $default_resolution_clock_gettime_wall $high_resolution_clock_gettime_wall $low_resolution_clock_gettime_wall; do - AC_TRY_COMPILE([ + AC_TRY_LINK([ #include <time.h> +$trust_test ], [ struct timespec ts; @@ -898,7 +933,15 @@ AC_DEFUN(ERL_WALL_CLOCK, done ]) - AC_CHECK_FUNCS([clock_getres clock_get_attributes gettimeofday]) + LIBS="$save_LIBS" + + if test "$LD_MAY_BE_WEAK" != "no"; then + check_for_clock_getres= + else + check_for_clock_getres=clock_getres + fi + + AC_CHECK_FUNCS([$check_for_clock_getres clock_get_attributes gettimeofday]) AC_CACHE_CHECK([for mach clock_get_time() with wall clock type], erl_cv_mach_clock_get_time_wall, [ @@ -919,6 +962,7 @@ AC_DEFUN(ERL_WALL_CLOCK, erl_cv_mach_clock_get_time_wall=no) ]) + erl_wall_clock_lib= erl_wall_clock_low_resolution=no erl_wall_clock_id= case $1-$erl_cv_clock_gettime_wall_$1-$erl_cv_mach_clock_get_time_wall-$ac_cv_func_gettimeofday-$host_os in @@ -932,6 +976,7 @@ AC_DEFUN(ERL_WALL_CLOCK, ;; *-CLOCK_*-*-*-*) erl_wall_clock_func=clock_gettime + erl_wall_clock_lib=$clock_gettime_lib erl_wall_clock_id=$erl_cv_clock_gettime_wall_$1 for low_res_id in $low_resolution_clock_gettime_wall; do if test $erl_wall_clock_id = $low_res_id; then @@ -1680,7 +1725,7 @@ case "$THR_LIB_NAME" in AC_DEFINE(ETHR_HAVE_SCHED_YIELD, 1, [Define if you have the sched_yield() function.]) AC_MSG_CHECKING([whether sched_yield() returns an int]) sched_yield_ret_int=no - AC_TRY_COMPILE([ + AC_TRY_LINK([ #ifdef ETHR_HAVE_SCHED_H #include <sched.h> #endif @@ -1699,7 +1744,7 @@ case "$THR_LIB_NAME" in AC_DEFINE(ETHR_HAVE_PTHREAD_YIELD, 1, [Define if you have the pthread_yield() function.]) AC_MSG_CHECKING([whether pthread_yield() returns an int]) pthread_yield_ret_int=no - AC_TRY_COMPILE([ + AC_TRY_LINK([ #if defined(ETHR_NEED_NPTL_PTHREAD_H) #include <nptl/pthread.h> #elif defined(ETHR_HAVE_MIT_PTHREAD_H) @@ -2436,7 +2481,13 @@ if test $erl_monotonic_clock_low_resolution = yes; then AC_DEFINE(ERTS_HAVE_LOW_RESOLUTION_OS_MONOTONIC_LOW, [1], [Define if you have a low resolution OS monotonic clock]) fi -xrtlib="$erl_monotonic_clock_lib" +xrtlib= +if test "$erl_monotonic_clock_lib" != ""; then + xrtlib="$erl_monotonic_clock_lib" +fi +if test "$erl_wall_clock_lib" != ""; then + xrtlib="$erl_wall_clock_lib" +fi if test "x$erl_monotonic_clock_id" != "x"; then AC_DEFINE_UNQUOTED(MONOTONIC_CLOCK_ID_STR, ["$erl_monotonic_clock_id"], [Define as a string of monotonic clock id to use]) AC_DEFINE_UNQUOTED(MONOTONIC_CLOCK_ID, [$erl_monotonic_clock_id], [Define to monotonic clock id to use]) |