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-rw-r--r--m4/ld-no-undefined.m415
1 files changed, 15 insertions, 0 deletions
diff --git a/m4/ld-no-undefined.m4 b/m4/ld-no-undefined.m4
new file mode 100644
index 0000000..6f342d0
--- /dev/null
+++ b/m4/ld-no-undefined.m4
@@ -0,0 +1,15 @@
+#!/usr/bin/m4
+dnl Check whether ld supports --no-undefined
+
+AC_DEFUN([PAM_LD_NO_UNDEFINED], [dnl
+ AC_CACHE_CHECK([whether ld supports --no-undefined],
+ [pam_cv_ld_no_undefined],
+ [saved_LDFLAGS="$LDFLAGS"
+ LDFLAGS="$LDFLAGS -Wl,--no-undefined"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM(,)],
+ [pam_cv_ld_no_undefined=yes],
+ [pam_cv_ld_no_undefined=no])
+ LDFLAGS="$saved_LDFLAGS"])
+ AS_IF([test $pam_cv_ld_no_undefined = yes],
+ [LDFLAGS="$LDFLAGS -Wl,--no-undefined"])
+])