Fix: configure.ac: check for possibly required libs for clock_gettime

[userspace-rcu.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index b86f371be22edcb8ff0eb3dd1653aba12978d979..fcad176c16e6c5aac0e349a084d32cd8d146c79a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -79,7 +79,6 @@ AC_FUNC_MMAP
 AC_FUNC_FORK
 AC_CHECK_FUNCS([ \
        atexit \
-       clock_gettime \
        getcpuid \
        gettid \
        gettimeofday \
@@ -215,6 +214,11 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
        compat_futex_test=1
 ])
 
+# Search for clock_gettime
+AC_SEARCH_LIBS([clock_gettime], [rt], [],
+       [AC_MSG_ERROR([Cannot find clock_gettime function.])]
+)
+
 # Check for pthread
 AC_CHECK_LIB([pthread], [pthread_create],
        [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, false)],