glibc/glibc-rh1315476-2.patch

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commit 9f9503b56a8c7566c91d486a67be5d41792a87ca
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Jul 13 14:06:00 2016 +0200
sln: Install as a hard link to ldconfig
Implementing and sln and ldconfig with the same binary saves
around 850 KiB from a glibc installation.
The sln program is implicitly tested during the build, so no test
case is needed.
Index: b/elf/Makefile
===================================================================
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -96,12 +96,8 @@ install-others = $(inst_rtlddir)/$(rtld-
install-bin-script = ldd
endif
-others = sprof sln
+others = sprof
install-bin = sprof
-others-static = sln
-install-rootsbin = sln
-sln-modules := static-stubs
-extra-objs += $(sln-modules:=.o)
ifeq (yes,$(use-ldconfig))
ifeq (yes,$(build-shared))
@@ -109,8 +105,16 @@ others-static += ldconfig
others += ldconfig
install-rootsbin += ldconfig
-ldconfig-modules := cache readlib xmalloc xstrdup chroot_canon static-stubs
+ldconfig-modules := cache readlib xmalloc xstrdup chroot_canon static-stubs sln
extra-objs += $(ldconfig-modules:=.o)
+
+# Install sln as a hard link to ldconfig.
+install-others-programs += $(inst_rootsbindir)/sln
+others: $(objpfx)sln
+$(objpfx)sln: $(objpfx)ldconfig
+ ln -f $< $@
+$(inst_rootsbindir)/sln: $(inst_rootsbindir)/ldconfig
+ ln -f $< $@
endif
endif
@@ -533,8 +537,6 @@ $(objpfx)ldd: ldd.bash.in $(common-objpf
$(objpfx)sprof: $(libdl)
-$(objpfx)sln: $(sln-modules:%=$(objpfx)%.o)
-
$(objpfx)ldconfig: $(ldconfig-modules:%=$(objpfx)%.o)
SYSCONF-FLAGS := -D'SYSCONFDIR="$(sysconfdir)"'
Index: b/elf/ldconfig.c
===================================================================
--- a/elf/ldconfig.c
+++ b/elf/ldconfig.c
@@ -44,6 +44,8 @@
#include <dl-procinfo.h>
+#include "sln.h"
+
#ifdef _DL_FIRST_PLATFORM
# define _DL_FIRST_EXTRA (_DL_FIRST_PLATFORM + _DL_PLATFORMS_COUNT)
#else
@@ -1285,6 +1287,9 @@ main (int argc, char **argv)
/* Set the text message domain. */
textdomain (_libc_intl_domainname);
+ if (run_sln (argv[0]))
+ return sln_main (argc, argv);
+
/* Parse and process arguments. */
int remaining;
argp_parse (&argp, argc, argv, 0, &remaining, NULL);
Index: b/elf/sln.c
===================================================================
--- a/elf/sln.c
+++ b/elf/sln.c
@@ -1,4 +1,4 @@
-/* `sln' program to create symbolic links between files.
+/* sln helper to create symbolic links between files, invoked from ldconfig.
Copyright (C) 1998-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -31,21 +31,29 @@
#include "../version.h"
-#define PACKAGE _libc_intl_domainname
+#include "sln.h"
static int makesymlink (const char *src, const char *dest);
static int makesymlinks (const char *file);
static void usage (void);
-int
-main (int argc, char **argv)
+/* Check if we have to run sln. */
+bool
+run_sln (const char *argv0)
{
- /* Set locale via LC_ALL. */
- setlocale (LC_ALL, "");
-
- /* Set the text message domain. */
- textdomain (PACKAGE);
+ const char *slash = strrchr (argv0, '/');
+ const char *progname;
+ if (slash == NULL)
+ progname = argv0;
+ else
+ progname = slash + 1;
+ return strcmp (progname, "sln") == 0;
+}
+/* Invoked from ldconfig. */
+int
+sln_main (int argc, char **argv)
+{
switch (argc)
{
case 2:
Index: b/elf/sln.h
===================================================================
--- /dev/null
+++ b/elf/sln.h
@@ -0,0 +1,30 @@
+/* Interface of the sln command-line tool.
+ Copyright (C) 2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef SLN_H
+#define SLN_H
+
+#include <stdbool.h>
+
+/* Return true if main should invoke sln_main. */
+bool run_sln (const char *argv0);
+
+/* Main routine of the sln command. */
+int sln_main (int argc, char **argv);
+
+#endif /* SLN_H */