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#! /bin/sh
# Fix multilib issue for header files.
# Copyright (C) 2015-2016 Red Hat, Inc.
# Written by Pavel Raiskup <praiskup@redhat.com>
#
# 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; either 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
# Replace the multilib-unclean file with multilib-clean stub, while the
# original file is moved to unique architecture-specific location.
@LIB@
opt_buildroot=$(pwd)
opt_field_separator=-
# TODO: we could pretty easily implement other then 'cpp-header' stubs, if the
# target file type allows some kind of "transparent" file inclusion. For
# example shell scripts might use '. "${destdir}/${filename}_x86_64.sh'.
# The solution is taken from Fedora PostgreSQL RPM package.
print_stub ()
{
# The '#else' branch here is not needed! We never install this header on
# systems where this set of '#ifdef's is not enough (adding suggested e.g.
# in rhbz#1242873).
# TODO: Shorten the #ifdef hell. There's no need to have e.g. ifdef for
# x86_64 in ppc64's wrapper.
replacement=$filename$opt_field_separator
cat <<EOF
/*
* Kluge to support multilib installation of both 32- and 64-bit RPMS:
* we need to arrange that header files that appear in both RPMs are
* identical. Hence, this file is architecture-independent and calls
* in an arch-dependent file that will appear in just one RPM.
*
* To avoid breaking arches not explicitly supported by Red Hat, we
* use this indirection file *only* on known multilib arches.
*
* We pay attention to include _only_ the original multilib-unclean
* header file. Including any other system-header file could cause
* unpredictable include-ordering issues (rhbz#1412274, comment #16).
*
* Note: this may well fail if user tries to use gcc's -I- option.
* But that option is deprecated anyway.
*/
#if defined(__x86_64__)
#include "${replacement}x86_64.h"
#elif defined(__i386__)
#include "${replacement}i386.h"
#elif defined(__ppc64__) || defined(__powerpc64__)
#include "${replacement}ppc64.h"
#elif defined(__ppc__) || defined(__powerpc__)
#include "${replacement}ppc.h"
#elif defined(__s390x__)
#include "${replacement}s390x.h"
#elif defined(__s390__)
#include "${replacement}s390.h"
#elif defined(__sparc__) && defined(__arch64__)
#include "${replacement}sparc64.h"
#elif defined(__sparc__)
#include "${replacement}sparc.h"
#endif
EOF
}
print_help ()
{
_h_exit=false
test -n "$1" && _h_exit=:
cat <<EOF
Usage: $progname [OPTIONS]
Replace the multilib-unclean header file with multilib-clean stub, while the
original file is moved to unique architecture-specific location. This should be
absolutely safe operation (effects of '#include <HEADER.h>' are unchanged.
To allow us to do incompatible changes in this script, packagers should use this
script only through available RPM macros.
--buildroot prefix (directory where we play with installed files, usually
after 'make install DESTDIR=buildroot')
--file for example /some/path/test.h
--field-separator by default we move filename.h to filename<SEP><ARCH>.h; this
option allows you to override the <SEP> part
--verbose print some useful information
--arch override arch detection (mostly for testing purposes)
--help show this help
EOF
$_h_exit && exit "$1"
}
while test $# -gt 0
do
_opt=$1 ; shift
case $_opt in
--buildroot|--arch|--file|--field-separator)
_raw_opt=$(echo "$_opt" | sed -e 's/^--//' -e 's/-/_/g')
eval "opt_$_raw_opt=\$1"
shift || die "$_opt requires argument"
;;
--help)
print_help 0
;;
*)
error "unexpected '$_opt' program argument"
;;
esac
done
$error_occurred && print_help 1
fix_arch opt_arch
for i in arch buildroot file
do
eval "test -z \"\$opt_$i\"" && error "--$i needs to be set"
done
$error_occurred && print_help 1
# --> /buildroot/usr/include/test.h
original_file="$opt_buildroot$opt_file"
# --> /buildroot/usr/include
destdir=$(dirname "$original_file")
# --> test.h
orig_basename=$(basename "$original_file")
# --> test
filename=${orig_basename%%.[a-zA-Z0-9_]}
# --> .h
suffix=${orig_basename##${filename}}
# --> ../test_x86_64.h (on x86_64)
multilib_file="$destdir/$filename$opt_field_separator$opt_arch$suffix"
test -f "$original_file" || die "can't find '$original_file'"
is_multilib "$opt_arch" || {
verbose "we don't need multilib haeder hack for '$opt_arch' architecture (no-op)"
exit 0
}
verbose "moving: '$original_file' to '$multilib_file'"
mv "$original_file" "$multilib_file" || exit 1
if print_stub > "$original_file" && chmod 644 "$original_file"; then
:
else
die "can't write into '$original_file'"
fi
: