Relevant BUGIDs:

Purpose of commit: new feature

Commit summary:
---------------
2010-10-19  Dmitry V. Levin  <ldv@altlinux.org>

	* m4/ld-no-undefined.m4: New file.
	* configure.in: Use PAM_LD_NO_UNDEFINED.
	* Makefile.am (M4_FILES): Add m4/ld-no-undefined.m4.

ChangeLog

@@ -5,6 +5,10 @@
 
 	* m4/ld-O1.m4 (PAM_LD_O1): Fix typo.
 
+	* m4/ld-no-undefined.m4: New file.
+	* configure.in: Use PAM_LD_NO_UNDEFINED.
+	* Makefile.am (M4_FILES): Add m4/ld-no-undefined.m4.
+
 2010-10-19  Thorsten Kukuk  <kukuk@thkukuk.de>
 
 	* modules/pam_env/pam_env.8.xml: Document side effects of

Makefile.am

@@ -14,8 +14,9 @@ CLEANFILES = *~
 
 M4_FILES = m4/gettext.m4 m4/iconv.m4 m4/intlmacosx.m4 \
 	m4/japhar_grep_cflags.m4 m4/jh_path_xml_catalog.m4 \
-	m4/ld-as-needed.m4 m4/ld-O1.m4 m4/lib-ld.m4 m4/lib-link.m4 \
-	m4/lib-prefix.m4 m4/libprelude.m4 m4/libtool.m4 m4/nls.m4 \
+	m4/ld-as-needed.m4 m4/ld-no-undefined.m4 m4/ld-O1.m4 \
+	m4/lib-ld.m4 m4/lib-link.m4 m4/lib-prefix.m4 \
+	m4/libprelude.m4 m4/libtool.m4 m4/nls.m4 \
 	m4/po.m4 m4/progtest.m4
 
 EXTRA_DIST = config.rpath mkinstalldirs pgp.keys.asc CHANGELOG \

configure.in

@@ -84,6 +84,7 @@ AC_PROG_MAKE_SET
 AC_PROG_LIBTOOL
 AM_PROG_CC_C_O
 PAM_LD_AS_NEEDED
+PAM_LD_NO_UNDEFINED
 PAM_LD_O1
 
 dnl Largefile support

m4/ld-no-undefined.m4

@@ -0,0 +1,24 @@
+# ld-no-undefined.m4 serial 1
+
+# Test if ld supports --no-undefined
+
+AC_DEFUN([PAM_LD_NO_UNDEFINED],
+  [
+    AC_CACHE_CHECK(whether ld supports --no-undefined,
+      pam_cv_ld_no_undefined, [ dnl
+    cat > conftest.c <<EOF
+int main (void) { return 0; }
+EOF
+     if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
+                                 -o conftest.o conftest.c
+                                 -Wl,--no-undefined 1>&AS_MESSAGE_LOG_FD])
+  then
+    pam_cv_ld_no_undefined=yes
+    LDFLAGS="$LDFLAGS -Wl,--no-undefined"
+  else
+    pam_cv_ld_no_undefined=no
+  fi
+  rm -f conftest*])
+  AC_SUBST(pam_cv_ld_no_undefined)
+  ]
+)