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-rw-r--r--m4/ld-as-needed.m424
1 files changed, 24 insertions, 0 deletions
diff --git a/m4/ld-as-needed.m4 b/m4/ld-as-needed.m4
new file mode 100644
index 0000000..5ba6e0f
--- /dev/null
+++ b/m4/ld-as-needed.m4
@@ -0,0 +1,24 @@
+# ld-as-needed.m4 serial 2
+
+# Test if ld supports --as-needed
+
+AC_DEFUN([PAM_LD_AS_NEEDED],
+ [
+ AC_CACHE_CHECK(whether ld supports --as-needed,
+ pam_cv_ld_as_needed, [ dnl
+ cat > conftest.c <<EOF
+int main (void) { return 0; }
+EOF
+ if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
+ -o conftest.o conftest.c
+ -Wl,--as-needed 1>&AS_MESSAGE_LOG_FD])
+ then
+ pam_cv_ld_as_needed=yes
+ LDFLAGS="$LDFLAGS -Wl,--as-needed"
+ else
+ pam_cv_ld_as_needed=no
+ fi
+ rm -f conftest*])
+ AC_SUBST(pam_cv_ld_as_needed)
+ ]
+)