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Generate /usr/libexec/getconf files when cross-compiling
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: <libc-alpha at sourceware dot org>
- Date: Wed, 14 Nov 2012 23:15:27 +0000
- Subject: Generate /usr/libexec/getconf files when cross-compiling
This patch fixes one of the remaining differences between native and
cross builds of glibc by generating /usr/libexec/getconf/ files when
cross-compiling.
These files are links to the getconf program for the purpose of
getconf returning compilation / linking options to use when building
programs for a different environment than that for which getconf
itself was built. The idea is that a system may have, for example,
both 32-bit and 64-bit copies of glibc installed; one provides an
ILP32 environment and the other provides an LP64 environment, but
/usr/bin/getconf can only come from one of the copies of glibc. If a
user runs getconf to determine options relating to the other
environment, getconf then execs a copy from /usr/libexec/getconf that
was installed by the other copy of glibc (and the sysconf function,
similarly, checks that directory to determine what environments are
supported; see sysdeps/posix/sysconf.c:__sysconf_check_spec).
The process for installing these links to getconf requires the
makefiles to determine the set of environments supported by this
particular copy of glibc. To do so, posix/Makefile runs the newly
built getconf program with appropriate arguments such as
_POSIX_V7_WIDTH_RESTRICTED_ENVS to print the list of supported
environments - with GETCONF_DIR=/dev/null set to ensure that only the
present glibc is considered and links previously installed in
/usr/libexec/getconf are not examined.
To work with cross-compilation, running a program built with the new
glibc is no longer an option. The relevant code ultimately depends on
the values of various macros from bits/environments.h. This patch
arranges for the correct settings of those macros to be determined
through preprocessing confstr.c, put in a generated cross-getconf.h
file, and used in building a cross-getconf program that uses the
relevant part of confstr.c, extracted into a new source file to be
shared between both getconf and cross-getconf/
Tested x86_64.
2012-11-14 Maxim Kuvyrkov <maxim@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* posix/confstr.inc: New file. Split out of ...
* posix/confstr.c (confstr): ... here.
* posix/cross-getconf.c: New file.
* posix/Makefile (getconf-envs): New variable.
(getconf-egrep): Likewise.
($(objpfx)cross-getconf.h): New target.
(cross-getconf-CFLAGS): New variable.
($(objpfx)cross-getconf): New target.
($(objpfx)getconf.speclist): Do not condition main definition on
[$(cross-compiling) = no]. Remove dummy definition. Use
$(objpfx)cross-getconf instead of $(objpfx)getconf.
diff --git a/posix/Makefile b/posix/Makefile
index 80fbf20..d7ef1e4 100644
--- a/posix/Makefile
+++ b/posix/Makefile
@@ -298,15 +298,31 @@ $(inst_libexecdir)/getconf: $(inst_bindir)/getconf \
mv -f $@/$$spec.new $@/$$spec; \
done < $(objpfx)getconf.speclist
-$(objpfx)getconf.speclist: $(objpfx)getconf
-ifeq (no,$(cross-compiling))
+getconf-envs := _POSIX_V7_ILP32_OFF32 _POSIX_V7_ILP32_OFFBIG \
+ _POSIX_V7_LP64_OFF64 _POSIX_V7_LPBIG_OFFBIG \
+ _POSIX_V6_ILP32_OFF32 _POSIX_V6_ILP32_OFFBIG \
+ _POSIX_V6_LP64_OFF64 _POSIX_V6_LPBIG_OFFBIG \
+ _XBS5_ILP32_OFF32 _XBS5_ILP32_OFFBIG \
+ _XBS5_LP64_OFF64 _XBS5_LPBIG_OFFBIG
+
+getconf-egrep := $(subst $(empty) ,|,$(strip $(getconf-envs)))
+
+# Get configuration defines for cross-getconf by preprocessing confstr.c.
+$(objpfx)cross-getconf.h: confstr.c confstr.inc
+ $(compile.c) -E -dM -o - \
+ | egrep "define ($(getconf-egrep))" > $@.new
+ mv -f $@.new $@
+
+cross-getconf-CFLAGS = -O -I$(objpfx)
+
+$(objpfx)cross-getconf: cross-getconf.c $(objpfx)cross-getconf.h
+ $(native-compile)
+
+$(objpfx)getconf.speclist: $(objpfx)cross-getconf
LC_ALL=C GETCONF_DIR=/dev/null \
- $(run-program-prefix) $< _POSIX_V7_WIDTH_RESTRICTED_ENVS > $@.new
+ $< _POSIX_V7_WIDTH_RESTRICTED_ENVS > $@.new
LC_ALL=C GETCONF_DIR=/dev/null \
- $(run-program-prefix) $< _POSIX_V6_WIDTH_RESTRICTED_ENVS >> $@.new
+ $< _POSIX_V6_WIDTH_RESTRICTED_ENVS >> $@.new
LC_ALL=C GETCONF_DIR=/dev/null \
- $(run-program-prefix) $< _XBS5_WIDTH_RESTRICTED_ENVS >> $@.new
-else
- > $@.new
-endif
+ $< _XBS5_WIDTH_RESTRICTED_ENVS >> $@.new
mv -f $@.new $@
diff --git a/posix/confstr.c b/posix/confstr.c
index cad6561..9f5eae7 100644
--- a/posix/confstr.c
+++ b/posix/confstr.c
@@ -48,182 +48,7 @@ confstr (name, buf, len)
}
break;
- case _CS_V7_WIDTH_RESTRICTED_ENVS:
- /* We have to return a newline-separated list of named of
- programming environements in which the widths of blksize_t,
- cc_t, mode_t, nfds_t, pid_t, ptrdiff_t, size_t, speed_t,
- ssize_t, suseconds_t, tcflag_t, useconds_t, wchar_t, and
- wint_t types are no greater than the width of type long.
-
- Currently this means all environment which the system allows. */
- string_len = 0;
-#ifndef _POSIX_V7_ILP32_OFF32
- if (__sysconf (_SC_V7_ILP32_OFF32) > 0)
-#endif
-#if !defined _POSIX_V7_ILP32_OFF32 || _POSIX_V7_ILP32_OFF32 > 0
- {
- memcpy (restenvs + string_len, "POSIX_V7_ILP32_OFF32",
- sizeof "POSIX_V7_ILP32_OFF32" - 1);
- string_len += sizeof "POSIX_V7_ILP32_OFF32" - 1;
- }
-#endif
-#ifndef _POSIX_V7_ILP32_OFFBIG
- if (__sysconf (_SC_V7_ILP32_OFFBIG) > 0)
-#endif
-#if !defined _POSIX_V7_ILP32_OFFBIG || _POSIX_V7_ILP32_OFFBIG > 0
- {
- if (string_len)
- restenvs[string_len++] = '\n';
- memcpy (restenvs + string_len, "POSIX_V7_ILP32_OFFBIG",
- sizeof "POSIX_V7_ILP32_OFFBIG" - 1);
- string_len += sizeof "POSIX_V7_ILP32_OFFBIG" - 1;
- }
-#endif
-#ifndef _POSIX_V7_LP64_OFF64
- if (__sysconf (_SC_V7_LP64_OFF64) > 0)
-#endif
-#if !defined _POSIX_V7_LP64_OFF64 || _POSIX_V7_LP64_OFF64 > 0
- {
- if (string_len)
- restenvs[string_len++] = '\n';
- memcpy (restenvs + string_len, "POSIX_V7_LP64_OFF64",
- sizeof "POSIX_V7_LP64_OFF64" - 1);
- string_len += sizeof "POSIX_V7_LP64_OFF64" - 1;
- }
-#endif
-#ifndef _POSIX_V7_LPBIG_OFFBIG
- if (__sysconf (_SC_V7_LPBIG_OFFBIG) > 0)
-#endif
-#if !defined _POSIX_V7_LPBIG_OFFBIG || _POSIX_V7_LPBIG_OFFBIG > 0
- {
- if (string_len)
- restenvs[string_len++] = '\n';
- memcpy (restenvs + string_len, "POSIX_V7_LPBIG_OFFBIG",
- sizeof "POSIX_V7_LPBIG_OFFBIG" - 1);
- string_len += sizeof "POSIX_V7_LPBIG_OFFBIG" - 1;
- }
-#endif
- restenvs[string_len++] = '\0';
- string = restenvs;
- break;
-
- case _CS_V6_WIDTH_RESTRICTED_ENVS:
- /* We have to return a newline-separated list of named of
- programming environements in which the widths of blksize_t,
- cc_t, mode_t, nfds_t, pid_t, ptrdiff_t, size_t, speed_t,
- ssize_t, suseconds_t, tcflag_t, useconds_t, wchar_t, and
- wint_t types are no greater than the width of type long.
-
- Currently this means all environment which the system allows. */
- string_len = 0;
-#ifndef _POSIX_V6_ILP32_OFF32
- if (__sysconf (_SC_V6_ILP32_OFF32) > 0)
-#endif
-#if !defined _POSIX_V6_ILP32_OFF32 || _POSIX_V6_ILP32_OFF32 > 0
- {
- memcpy (restenvs + string_len, "POSIX_V6_ILP32_OFF32",
- sizeof "POSIX_V6_ILP32_OFF32" - 1);
- string_len += sizeof "POSIX_V6_ILP32_OFF32" - 1;
- }
-#endif
-#ifndef _POSIX_V6_ILP32_OFFBIG
- if (__sysconf (_SC_V6_ILP32_OFFBIG) > 0)
-#endif
-#if !defined _POSIX_V6_ILP32_OFFBIG || _POSIX_V6_ILP32_OFFBIG > 0
- {
- if (string_len)
- restenvs[string_len++] = '\n';
- memcpy (restenvs + string_len, "POSIX_V6_ILP32_OFFBIG",
- sizeof "POSIX_V6_ILP32_OFFBIG" - 1);
- string_len += sizeof "POSIX_V6_ILP32_OFFBIG" - 1;
- }
-#endif
-#ifndef _POSIX_V6_LP64_OFF64
- if (__sysconf (_SC_V6_LP64_OFF64) > 0)
-#endif
-#if !defined _POSIX_V6_LP64_OFF64 || _POSIX_V6_LP64_OFF64 > 0
- {
- if (string_len)
- restenvs[string_len++] = '\n';
- memcpy (restenvs + string_len, "POSIX_V6_LP64_OFF64",
- sizeof "POSIX_V6_LP64_OFF64" - 1);
- string_len += sizeof "POSIX_V6_LP64_OFF64" - 1;
- }
-#endif
-#ifndef _POSIX_V6_LPBIG_OFFBIG
- if (__sysconf (_SC_V6_LPBIG_OFFBIG) > 0)
-#endif
-#if !defined _POSIX_V6_LPBIG_OFFBIG || _POSIX_V6_LPBIG_OFFBIG > 0
- {
- if (string_len)
- restenvs[string_len++] = '\n';
- memcpy (restenvs + string_len, "POSIX_V6_LPBIG_OFFBIG",
- sizeof "POSIX_V6_LPBIG_OFFBIG" - 1);
- string_len += sizeof "POSIX_V6_LPBIG_OFFBIG" - 1;
- }
-#endif
- restenvs[string_len++] = '\0';
- string = restenvs;
- break;
-
- case _CS_V5_WIDTH_RESTRICTED_ENVS:
- /* We have to return a newline-separated list of named of
- programming environements in which the widths of blksize_t,
- cc_t, mode_t, nfds_t, pid_t, ptrdiff_t, size_t, speed_t,
- ssize_t, suseconds_t, tcflag_t, useconds_t, wchar_t, and
- wint_t types are no greater than the width of type long.
-
- Currently this means all environment which the system allows. */
- string_len = 0;
-#ifndef _XBS5_ILP32_OFF32
- if (__sysconf (_SC_XBS5_ILP32_OFF32) > 0)
-#endif
-#if !defined _XBS5_ILP32_OFF32 || _XBS5_ILP32_OFF32 > 0
- {
- memcpy (restenvs + string_len, "XBS5_ILP32_OFF32",
- sizeof "XBS5_ILP32_OFF32" - 1);
- string_len += sizeof "XBS5_ILP32_OFF32" - 1;
- }
-#endif
-#ifndef _XBS5_ILP32_OFFBIG
- if (__sysconf (_SC_XBS5_ILP32_OFFBIG) > 0)
-#endif
-#if !defined _XBS5_ILP32_OFFBIG || _XBS5_ILP32_OFFBIG > 0
- {
- if (string_len)
- restenvs[string_len++] = '\n';
- memcpy (restenvs + string_len, "XBS5_ILP32_OFFBIG",
- sizeof "XBS5_ILP32_OFFBIG" - 1);
- string_len += sizeof "XBS5_ILP32_OFFBIG" - 1;
- }
-#endif
-#ifndef _XBS5_LP64_OFF64
- if (__sysconf (_SC_XBS5_LP64_OFF64) > 0)
-#endif
-#if !defined _XBS5_LP64_OFF64 || _XBS5_LP64_OFF64 > 0
- {
- if (string_len)
- restenvs[string_len++] = '\n';
- memcpy (restenvs + string_len, "XBS5_LP64_OFF64",
- sizeof "XBS5_LP64_OFF64" - 1);
- string_len += sizeof "XBS5_LP64_OFF64" - 1;
- }
-#endif
-#ifndef _XBS5_LPBIG_OFFBIG
- if (__sysconf (_SC_XBS5_LPBIG_OFFBIG) > 0)
-#endif
-#if !defined _XBS5_LPBIG_OFFBIG || _XBS5_LPBIG_OFFBIG > 0
- {
- if (string_len)
- restenvs[string_len++] = '\n';
- memcpy (restenvs + string_len, "XBS5_LPBIG_OFFBIG",
- sizeof "XBS5_LPBIG_OFFBIG" - 1);
- string_len += sizeof "XBS5_LPBIG_OFFBIG" - 1;
- }
-#endif
- restenvs[string_len++] = '\0';
- string = restenvs;
- break;
+#include "confstr.inc"
case _CS_XBS5_ILP32_OFF32_CFLAGS:
case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
diff --git a/posix/confstr.inc b/posix/confstr.inc
new file mode 100644
index 0000000..7675eff
--- /dev/null
+++ b/posix/confstr.inc
@@ -0,0 +1,195 @@
+/* Determine supported programming environments, for getconf and
+ cross-getconf.
+ Copyright (C) 1991-2012 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/>. */
+
+ case _CS_V7_WIDTH_RESTRICTED_ENVS:
+ /* We have to return a newline-separated list of named of
+ programming environements in which the widths of blksize_t,
+ cc_t, mode_t, nfds_t, pid_t, ptrdiff_t, size_t, speed_t,
+ ssize_t, suseconds_t, tcflag_t, useconds_t, wchar_t, and
+ wint_t types are no greater than the width of type long.
+
+ Currently this means all environment which the system allows. */
+ string_len = 0;
+#ifndef _POSIX_V7_ILP32_OFF32
+ if (__sysconf (_SC_V7_ILP32_OFF32) > 0)
+#endif
+#if !defined _POSIX_V7_ILP32_OFF32 || _POSIX_V7_ILP32_OFF32 > 0
+ {
+ memcpy (restenvs + string_len, "POSIX_V7_ILP32_OFF32",
+ sizeof "POSIX_V7_ILP32_OFF32" - 1);
+ string_len += sizeof "POSIX_V7_ILP32_OFF32" - 1;
+ }
+#endif
+#ifndef _POSIX_V7_ILP32_OFFBIG
+ if (__sysconf (_SC_V7_ILP32_OFFBIG) > 0)
+#endif
+#if !defined _POSIX_V7_ILP32_OFFBIG || _POSIX_V7_ILP32_OFFBIG > 0
+ {
+ if (string_len)
+ restenvs[string_len++] = '\n';
+ memcpy (restenvs + string_len, "POSIX_V7_ILP32_OFFBIG",
+ sizeof "POSIX_V7_ILP32_OFFBIG" - 1);
+ string_len += sizeof "POSIX_V7_ILP32_OFFBIG" - 1;
+ }
+#endif
+#ifndef _POSIX_V7_LP64_OFF64
+ if (__sysconf (_SC_V7_LP64_OFF64) > 0)
+#endif
+#if !defined _POSIX_V7_LP64_OFF64 || _POSIX_V7_LP64_OFF64 > 0
+ {
+ if (string_len)
+ restenvs[string_len++] = '\n';
+ memcpy (restenvs + string_len, "POSIX_V7_LP64_OFF64",
+ sizeof "POSIX_V7_LP64_OFF64" - 1);
+ string_len += sizeof "POSIX_V7_LP64_OFF64" - 1;
+ }
+#endif
+#ifndef _POSIX_V7_LPBIG_OFFBIG
+ if (__sysconf (_SC_V7_LPBIG_OFFBIG) > 0)
+#endif
+#if !defined _POSIX_V7_LPBIG_OFFBIG || _POSIX_V7_LPBIG_OFFBIG > 0
+ {
+ if (string_len)
+ restenvs[string_len++] = '\n';
+ memcpy (restenvs + string_len, "POSIX_V7_LPBIG_OFFBIG",
+ sizeof "POSIX_V7_LPBIG_OFFBIG" - 1);
+ string_len += sizeof "POSIX_V7_LPBIG_OFFBIG" - 1;
+ }
+#endif
+ restenvs[string_len++] = '\0';
+ string = restenvs;
+ break;
+
+ case _CS_V6_WIDTH_RESTRICTED_ENVS:
+ /* We have to return a newline-separated list of named of
+ programming environements in which the widths of blksize_t,
+ cc_t, mode_t, nfds_t, pid_t, ptrdiff_t, size_t, speed_t,
+ ssize_t, suseconds_t, tcflag_t, useconds_t, wchar_t, and
+ wint_t types are no greater than the width of type long.
+
+ Currently this means all environment which the system allows. */
+ string_len = 0;
+#ifndef _POSIX_V6_ILP32_OFF32
+ if (__sysconf (_SC_V6_ILP32_OFF32) > 0)
+#endif
+#if !defined _POSIX_V6_ILP32_OFF32 || _POSIX_V6_ILP32_OFF32 > 0
+ {
+ memcpy (restenvs + string_len, "POSIX_V6_ILP32_OFF32",
+ sizeof "POSIX_V6_ILP32_OFF32" - 1);
+ string_len += sizeof "POSIX_V6_ILP32_OFF32" - 1;
+ }
+#endif
+#ifndef _POSIX_V6_ILP32_OFFBIG
+ if (__sysconf (_SC_V6_ILP32_OFFBIG) > 0)
+#endif
+#if !defined _POSIX_V6_ILP32_OFFBIG || _POSIX_V6_ILP32_OFFBIG > 0
+ {
+ if (string_len)
+ restenvs[string_len++] = '\n';
+ memcpy (restenvs + string_len, "POSIX_V6_ILP32_OFFBIG",
+ sizeof "POSIX_V6_ILP32_OFFBIG" - 1);
+ string_len += sizeof "POSIX_V6_ILP32_OFFBIG" - 1;
+ }
+#endif
+#ifndef _POSIX_V6_LP64_OFF64
+ if (__sysconf (_SC_V6_LP64_OFF64) > 0)
+#endif
+#if !defined _POSIX_V6_LP64_OFF64 || _POSIX_V6_LP64_OFF64 > 0
+ {
+ if (string_len)
+ restenvs[string_len++] = '\n';
+ memcpy (restenvs + string_len, "POSIX_V6_LP64_OFF64",
+ sizeof "POSIX_V6_LP64_OFF64" - 1);
+ string_len += sizeof "POSIX_V6_LP64_OFF64" - 1;
+ }
+#endif
+#ifndef _POSIX_V6_LPBIG_OFFBIG
+ if (__sysconf (_SC_V6_LPBIG_OFFBIG) > 0)
+#endif
+#if !defined _POSIX_V6_LPBIG_OFFBIG || _POSIX_V6_LPBIG_OFFBIG > 0
+ {
+ if (string_len)
+ restenvs[string_len++] = '\n';
+ memcpy (restenvs + string_len, "POSIX_V6_LPBIG_OFFBIG",
+ sizeof "POSIX_V6_LPBIG_OFFBIG" - 1);
+ string_len += sizeof "POSIX_V6_LPBIG_OFFBIG" - 1;
+ }
+#endif
+ restenvs[string_len++] = '\0';
+ string = restenvs;
+ break;
+
+ case _CS_V5_WIDTH_RESTRICTED_ENVS:
+ /* We have to return a newline-separated list of named of
+ programming environements in which the widths of blksize_t,
+ cc_t, mode_t, nfds_t, pid_t, ptrdiff_t, size_t, speed_t,
+ ssize_t, suseconds_t, tcflag_t, useconds_t, wchar_t, and
+ wint_t types are no greater than the width of type long.
+
+ Currently this means all environment which the system allows. */
+ string_len = 0;
+#ifndef _XBS5_ILP32_OFF32
+ if (__sysconf (_SC_XBS5_ILP32_OFF32) > 0)
+#endif
+#if !defined _XBS5_ILP32_OFF32 || _XBS5_ILP32_OFF32 > 0
+ {
+ memcpy (restenvs + string_len, "XBS5_ILP32_OFF32",
+ sizeof "XBS5_ILP32_OFF32" - 1);
+ string_len += sizeof "XBS5_ILP32_OFF32" - 1;
+ }
+#endif
+#ifndef _XBS5_ILP32_OFFBIG
+ if (__sysconf (_SC_XBS5_ILP32_OFFBIG) > 0)
+#endif
+#if !defined _XBS5_ILP32_OFFBIG || _XBS5_ILP32_OFFBIG > 0
+ {
+ if (string_len)
+ restenvs[string_len++] = '\n';
+ memcpy (restenvs + string_len, "XBS5_ILP32_OFFBIG",
+ sizeof "XBS5_ILP32_OFFBIG" - 1);
+ string_len += sizeof "XBS5_ILP32_OFFBIG" - 1;
+ }
+#endif
+#ifndef _XBS5_LP64_OFF64
+ if (__sysconf (_SC_XBS5_LP64_OFF64) > 0)
+#endif
+#if !defined _XBS5_LP64_OFF64 || _XBS5_LP64_OFF64 > 0
+ {
+ if (string_len)
+ restenvs[string_len++] = '\n';
+ memcpy (restenvs + string_len, "XBS5_LP64_OFF64",
+ sizeof "XBS5_LP64_OFF64" - 1);
+ string_len += sizeof "XBS5_LP64_OFF64" - 1;
+ }
+#endif
+#ifndef _XBS5_LPBIG_OFFBIG
+ if (__sysconf (_SC_XBS5_LPBIG_OFFBIG) > 0)
+#endif
+#if !defined _XBS5_LPBIG_OFFBIG || _XBS5_LPBIG_OFFBIG > 0
+ {
+ if (string_len)
+ restenvs[string_len++] = '\n';
+ memcpy (restenvs + string_len, "XBS5_LPBIG_OFFBIG",
+ sizeof "XBS5_LPBIG_OFFBIG" - 1);
+ string_len += sizeof "XBS5_LPBIG_OFFBIG" - 1;
+ }
+#endif
+ restenvs[string_len++] = '\0';
+ string = restenvs;
+ break;
diff --git a/posix/cross-getconf.c b/posix/cross-getconf.c
new file mode 100644
index 0000000..f4371b2
--- /dev/null
+++ b/posix/cross-getconf.c
@@ -0,0 +1,143 @@
+/* Copyright (C) 2008-2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; version 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, see <http://www.gnu.org/licenses/>. */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+/* Undefine macros that should be defined in cross-getconf.h. */
+#undef _POSIX_V7_ILP32_OFF32
+#undef _POSIX_V7_ILP32_OFFBIG
+#undef _POSIX_V7_LP64_OFF64
+#undef _POSIX_V7_LPBIG_OFFBIG
+#undef _POSIX_V6_ILP32_OFF32
+#undef _POSIX_V6_ILP32_OFFBIG
+#undef _POSIX_V6_LP64_OFF64
+#undef _POSIX_V6_LPBIG_OFFBIG
+#undef _XBS5_ILP32_OFF32
+#undef _XBS5_ILP32_OFFBIG
+#undef _XBS5_LP64_OFF64
+#undef _XBS5_LPBIG_OFFBIG
+
+#include "cross-getconf.h"
+
+/* Define macros cross-getconf.h doesn't define to (-1).
+ This will prevent using host's __sysconf in confstr.inc. */
+#ifndef _POSIX_V7_ILP32_OFF32
+# define _POSIX_V7_ILP32_OFF32 (-1)
+#endif
+#ifndef _POSIX_V7_ILP32_OFFBIG
+# define _POSIX_V7_ILP32_OFFBIG (-1)
+#endif
+#ifndef _POSIX_V7_LP64_OFF64
+# define _POSIX_V7_LP64_OFF64 (-1)
+#endif
+#ifndef _POSIX_V7_LPBIG_OFFBIG
+# define _POSIX_V7_LPBIG_OFFBIG (-1)
+#endif
+#ifndef _POSIX_V6_ILP32_OFF32
+# define _POSIX_V6_ILP32_OFF32 (-1)
+#endif
+#ifndef _POSIX_V6_ILP32_OFFBIG
+# define _POSIX_V6_ILP32_OFFBIG (-1)
+#endif
+#ifndef _POSIX_V6_LP64_OFF64
+# define _POSIX_V6_LP64_OFF64 (-1)
+#endif
+#ifndef _POSIX_V6_LPBIG_OFFBIG
+# define _POSIX_V6_LPBIG_OFFBIG (-1)
+#endif
+#ifndef _XBS5_ILP32_OFF32
+# define _XBS5_ILP32_OFF32 (-1)
+#endif
+#ifndef _XBS5_ILP32_OFFBIG
+# define _XBS5_ILP32_OFFBIG (-1)
+#endif
+#ifndef _XBS5_LP64_OFF64
+# define _XBS5_LP64_OFF64 (-1)
+#endif
+#ifndef _XBS5_LPBIG_OFFBIG
+# define _XBS5_LPBIG_OFFBIG (-1)
+#endif
+
+#undef _CS_V5_WIDTH_RESTRICTED_ENVS
+#define _CS_V5_WIDTH_RESTRICTED_ENVS 5
+
+#undef _CS_V6_WIDTH_RESTRICTED_ENVS
+#define _CS_V6_WIDTH_RESTRICTED_ENVS 6
+
+#undef _CS_V7_WIDTH_RESTRICTED_ENVS
+#define _CS_V7_WIDTH_RESTRICTED_ENVS 7
+
+/* Cross-getconf is a very simple program that assumes fixed
+ input and produces fixed output. It handles only cases
+ that are necessary to cross-compile glibc. */
+
+void
+cross_getconf (int name)
+{
+ const char *string = "";
+ size_t string_len = 1;
+
+ /* Note that this buffer must be large enough for the longest strings
+ used below. */
+ char restenvs[4 * sizeof "POSIX_V7_LPBIG_OFFBIG"];
+
+ switch (name)
+ {
+#include "confstr.inc"
+ }
+
+ printf ("%.*s\n", (int) string_len, string);
+}
+
+int
+main (int argc, char *argv[])
+{
+ const char *getconf_dir;
+
+ if (argc != 2)
+ {
+ fprintf (stderr,
+ "%s: must be called with exactly one argument\n", argv[0]);
+ return 1;
+ }
+
+ getconf_dir = getenv ("GETCONF_DIR");
+ if (getconf_dir == NULL
+ || strcmp (getconf_dir, "/dev/null") != 0)
+ {
+ fprintf (stderr, "%s: GETCONF_DIR should be /dev/null\n", argv[0]);
+ return 1;
+ }
+
+ if (strcmp (argv[1], "_POSIX_V7_WIDTH_RESTRICTED_ENVS") == 0)
+ cross_getconf (_CS_V7_WIDTH_RESTRICTED_ENVS);
+ else if (strcmp (argv[1], "_POSIX_V6_WIDTH_RESTRICTED_ENVS") == 0)
+ cross_getconf (_CS_V6_WIDTH_RESTRICTED_ENVS);
+ else if (strcmp (argv[1], "_XBS5_WIDTH_RESTRICTED_ENVS") == 0)
+ cross_getconf (_CS_V5_WIDTH_RESTRICTED_ENVS);
+ else
+ {
+ fprintf (stderr,
+ "%s: the only supported arguments value are "
+ "_POSIX_V7_WIDTH_RESTRICTED_ENVS, "
+ "_POSIX_V6_WIDTH_RESTRICTED_ENVS, and "
+ "_XBS5_WIDTH_RESTRICTED_ENVS\n", argv[0]);
+ return 1;
+ }
+ return 0;
+}
--
Joseph S. Myers
joseph@codesourcery.com