This patch enables building gcc-4.6.4 using gcc-2.95.3 and glibc-2.2.5

  * Tweak Makefile to allow overriding NATIVE_SYSTEM_HEADER_DIR using #:makeflags
  * Add missing limits.h include.
  * Add SSIZE_MAX define.  The SSIZE_MAX define has been added to Mes
    upstream and can be removed with the next Mes release.
  * Remove -fbuilding-libgcc flag, it assumes features being present from a
    newer gcc or glibc.
  * [MES_BOOTSTRAP_GCC]: Disable threads harder.

Upstream status: not presented upstream.

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index f3cc49fdb18..bc5718fc9a6 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -440,7 +440,7 @@ LINKER_PLUGIN_API_H = $(srcdir)/../include/plugin-api.h
 LTO_SYMTAB_H = $(srcdir)/../include/lto-symtab.h
 
 # Default native SYSTEM_HEADER_DIR, to be overridden by targets.
-NATIVE_SYSTEM_HEADER_DIR = /usr/include
+# NATIVE_SYSTEM_HEADER_DIR = /usr/include
 # Default cross SYSTEM_HEADER_DIR, to be overridden by targets.
 CROSS_SYSTEM_HEADER_DIR = @CROSS_SYSTEM_HEADER_DIR@
 
diff --git a/gcc/config/host-linux.c b/gcc/config/host-linux.c
index 94b7a0b89a7..ab2baab55ca 100644
--- a/gcc/config/host-linux.c
+++ b/gcc/config/host-linux.c
@@ -23,6 +23,12 @@
 #include "hosthooks.h"
 #include "hosthooks-def.h"
 
+// ../.././gcc/config/host-linux.c:213: `SSIZE_MAX' undeclared (first
+// use in this function)
+#include <limits.h>
+#ifndef	SSIZE_MAX
+# define SSIZE_MAX	LONG_MAX
+#endif
 
 /* Linux has a feature called exec-shield-randomize that perturbs the
    address of non-fixed mapped segments by a (relatively) small amount.
diff --git a/libgcc/generic-morestack-thread.c b/libgcc/generic-morestack-thread.c
index bbe6dd12b5a..1d1d48223d7 100644
--- a/libgcc/generic-morestack-thread.c
+++ b/libgcc/generic-morestack-thread.c
@@ -34,7 +34,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    will want to define inhibit_libc while building a compiler which
    can build glibc.  */
 
-#ifndef inhibit_libc
+#if 0 //!defined (inhibit_libc) && !MES_BOOTSTRAP_GCC
 
 #include <errno.h>
 #include <pthread.h>
/<a href='/guix/log/gnu?id=a5df69fe1e8a63441e8e28af718b474d776b8b6f'>gnu</a>/<a href='/guix/log/gnu/tests?id=a5df69fe1e8a63441e8e28af718b474d776b8b6f'>tests</a>/<a href='/guix/log/gnu/tests/ldap.scm?id=a5df69fe1e8a63441e8e28af718b474d776b8b6f'>ldap.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/tests/ldap.scm?id=a5df69fe1e8a63441e8e28af718b474d776b8b6f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-12-09 23:15:44 +0100'>2024-12-09</span></td><td><a href='/guix/commit/gnu/tests/ldap.scm?id=e7cd328714be93ed6a931c9110b52adc7b439752'>tests: Adjust for new return value of ‘start-service’.</a><span class='msg-avail'>...<span class='msg-tooltip'>In Shepherd 1.0, the “running value” of processes is no longer a plain
integer; instead, it is a (process …) sexp.  This commit adjusts tests
to this change in a way that works both for 1.0 and for previous
versions.

* gnu/tests/databases.scm (run-memcached-test)
(run-mysql-test): Don’t expect PID to be a number.
* gnu/tests/docker.scm (run-docker-test)
(run-docker-system-test, run-oci-container-test): Likewise.
* gnu/tests/guix.scm (run-guix-build-coordinator-test)
(run-guix-data-service-test, run-nar-herder-test)
(run-bffe-test): Likewise.
* gnu/tests/ldap.scm (run-ldap-test): Likewise.
* gnu/tests/monitoring.scm (run-prometheus-node-exporter-server-test):
Likewise.
* gnu/tests/virtualization.scm (run-libvirt-test)
(run-qemu-guest-agent-test, run-childhurd-test): Likewise.
* gnu/tests/web.scm (run-webserver-test, run-php-fpm-test)
(run-hpcguix-web-server-test, run-patchwork-test)
(run-agate-test): Likewise
* gnu/tests/ssh.scm (run-ssh-test): Accept a number, an ‘inetd-service’
sexp, or a ‘process’ sexp.

Change-Id: I8c7a37a981f0788780fbc33752a38e7f9a026437
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-08-11 02:00:00 +0200'>2024-08-11</span></td><td><a href='/guix/commit/gnu/tests/ldap.scm?id=902b15b24d6ea2a1e255b88dff7670e8a95cb9a9'>gnu: Replace (almost) all uses of /run/setuid-programs.</a><span class='msg-avail'>...<span class='msg-tooltip'>…those good for master, anyway.

* gnu/packages/admin.scm (ktsuss, opendoas, hosts)
[arguments]: Replace /run/setuid-programs with /run/privileged/bin.
* gnu/packages/containers.scm (slirp4netns)[arguments]: Likewise.
* gnu/packages/debian.scm (pbuilder)[arguments]: Likewise.
* gnu/packages/disk.scm (udevil)[arguments]: Likewise.
* gnu/packages/enlightenment.scm (efl, enlightenment)
[arguments]: Likewise.
* gnu/packages/gnome.scm (gdm, gnome-control-center)
[arguments]: Likewise.
* gnu/packages/linux.scm (singularity)[arguments]: Likewise.
* gnu/packages/lxde.scm (spacefm)[arguments]: Likewise.
* gnu/packages/monitoring.scm (zabbix-agentd)[arguments]: Likewise.
* gnu/packages/virtualization.scm (ganeti)[arguments]: Likewise.
* gnu/packages/xdisorg.scm (xsecurelock)[arguments]: Likewise.
* gnu/services/dbus.scm (dbus-configuration-directory): Likewise.
* gnu/services/ganeti.scm (%default-ganeti-environment-variables):
Likewise.
* gnu/services/monitoring.scm (zabbix-agent-shepherd-service): Likewise.
* gnu/tests/ldap.scm (marionette): Likewise.
* gnu/tests/monitoring.scm (os): Likewise.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>