X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fgroup-member.m4;h=36fda49f15102fc94efb4f13cbf66b41912b2248;hb=6ae064ff870571ee82f7d0cca2bb5d522e8e5dfa;hp=bdfdec42eacd95b36a0005ca7eb0d1f4325837c4;hpb=23dc5057d629b246339ea498a3bf74fb12c0600b;p=gnulib.git

diff --git a/m4/group-member.m4 b/m4/group-member.m4
index bdfdec42e..36fda49f1 100644
--- a/m4/group-member.m4
+++ b/m4/group-member.m4
@@ -1,12 +1,24 @@
-#serial 1
+#serial 4
 
 dnl Written by Jim Meyering
 
-AC_DEFUN(jm_FUNC_GROUP_MEMBER,
-  [
-    dnl Do this replacement check manually because I want the hyphen
-    dnl (not the underscore) in the filename.
-    AC_CHECK_FUNC(group_member, , [LIBOBJS="$LIBOBJS group-member.$ac_objext"])
-    AC_SUBST(LIBOBJS)
-  ]
-)
+AC_DEFUN([jm_FUNC_GROUP_MEMBER],
+[
+  dnl Persuade glibc <unistd.h> to declare group_member().
+  AC_REQUIRE([AC_GNU_SOURCE])
+
+  dnl Do this replacement check manually because I want the hyphen
+  dnl (not the underscore) in the filename.
+  AC_CHECK_FUNC(group_member, , [
+    AC_LIBOBJ(group-member)
+    gl_PREREQ_GROUP_MEMBER
+  ])
+])
+
+# Prerequisites of lib/group-member.c.
+AC_DEFUN([gl_PREREQ_GROUP_MEMBER],
+[
+  AC_REQUIRE([AC_HEADER_STDC])
+  AC_CHECK_HEADERS_ONCE(unistd.h)
+  AC_REQUIRE([AC_FUNC_GETGROUPS])
+])