gnum4: drop obsolete patches

pkgs/development/tools/misc/gnum4/default.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     && !stdenv.isSunOS;                    # XXX: `test-setlocale2.sh' fails
 
   # Upstream is aware of it; it may be in the next release.
-  patches = [ ./s_isdir.patch ./readlink-EINVAL.patch ./no-gets.patch ];
+  patches = [ ./s_isdir.patch ];
 
   meta = {
     homepage = http://www.gnu.org/software/m4/;

pkgs/development/tools/misc/gnum4/no-gets.patch

@@ -1,26 +0,0 @@
-http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sys-devel/m4/files/m4-1.4.16-no-gets.patch?revision=1.1
-
-https://bugs.gentoo.org/424978
-
-hack until m4 pulls a newer gnulib version
-
-From 66712c23388e93e5c518ebc8515140fa0c807348 Mon Sep 17 00:00:00 2001
-From: Eric Blake <eblake@redhat.com>
-Date: Thu, 29 Mar 2012 13:30:41 -0600
-Subject: [PATCH] stdio: don't assume gets any more
-
-Gnulib intentionally does not have a gets module, and now that C11
-and glibc have dropped it, we should be more proactive about warning
-any user on a platform that still has a declaration of this dangerous
-interface.
-
---- a/lib/stdio.in.h
-+++ b/lib/stdio.in.h
-@@ -125,7 +125,6 @@
-    so any use of gets warrants an unconditional warning.  Assume it is
-    always declared, since it is required by C89.  */
- #undef gets
--_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
- 
- #if @GNULIB_FOPEN@
- # if @REPLACE_FOPEN@

pkgs/development/tools/misc/gnum4/readlink-EINVAL.patch

@@ -1,18 +0,0 @@
-Newer Linux kernels would return EINVAL instead of ENOENT.
-The patch below, taken from Gnulib, allows the test to pass when
-these Linux versions are in use:
-https://lists.gnu.org/archive/html/bug-gnulib/2011-03/msg00308.html .
-
-diff --git a/tests/test-readlink.h b/tests/test-readlink.h
-index 08d5662..7247fc4 100644
---- a/tests/test-readlink.h
-+++ b/tests/test-readlink.h
-@@ -38,7 +38,7 @@ test_readlink (ssize_t (*func) (char const *, char *, size_t), bool print)
-   ASSERT (errno == ENOENT);
-   errno = 0;
-   ASSERT (func ("", buf, sizeof buf) == -1);
--  ASSERT (errno == ENOENT);
-+  ASSERT (errno == ENOENT || errno == EINVAL);
-   errno = 0;
-   ASSERT (func (".", buf, sizeof buf) == -1);
-   ASSERT (errno == EINVAL);