| 1 | #! /bin/bash
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| 2 |
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| 3 | #
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| 4 | # Copyright (c) 2011 Petr Koupy
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| 5 | # All rights reserved.
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| 6 | #
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| 7 | # Redistribution and use in source and binary forms, with or without
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| 8 | # modification, are permitted provided that the following conditions
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| 9 | # are met:
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| 10 | #
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| 11 | # - Redistributions of source code must retain the above copyright
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| 12 | # notice, this list of conditions and the following disclaimer.
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| 13 | # - Redistributions in binary form must reproduce the above copyright
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| 14 | # notice, this list of conditions and the following disclaimer in the
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| 15 | # documentation and/or other materials provided with the distribution.
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| 16 | # - The name of the author may not be used to endorse or promote products
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| 17 | # derived from this software without specific prior written permission.
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| 18 | #
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| 19 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 20 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 21 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 22 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 23 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 24 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 25 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 26 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 27 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 28 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 29 | #
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| 30 |
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| 31 | #
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| 32 | # This shell script is reserved for intrusive patches (hacks) to binutils
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| 33 | # that cannot be done in a clean and isolated way or for which doing so
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| 34 | # would require too much complexity.
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| 35 | #
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| 36 | # List of patch descriptions:
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| 37 | #
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| 38 | # Patch 1
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| 39 | # Even though binutils build process supports cross compilation where
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| 40 | # build and host platforms are different, it is not easily applicable
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| 41 | # to HelenOS. It would be difficult to satisfy binutils expectations
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| 42 | # of host headers, libraries and tools on a build system (at least
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| 43 | # until these are developed/ported). Another issue would be the
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| 44 | # necessity to carry out time consuming full canadian cross compilation
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| 45 | # (even in case when build, host and target hardware platforms are the
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| 46 | # same). Instead of going into such trouble, it is easier to leverage
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| 47 | # already built HelenOS toolchain as a first stage of canadian cross
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| 48 | # and trick binutils scripts to do a simple cross compilation while
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| 49 | # actually doing second stage of canadian cross. Because binutils
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| 50 | # configure scripts try to compile and execute various testing code, it
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| 51 | # have to be ensured that these tests are skipped. Such behaviour can
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| 52 | # be acomplished by patching cross compilation flag while leaving host
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| 53 | # and build parameters empty (i.e. configure script believes it is
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| 54 | # not doing cross compilation while skipping some testing as in the case
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| 55 | # of cross compilation).
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| 56 | #
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| 57 | # Patch 2
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| 58 | # Enabled cross compilation flag brings along some anomalies which
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| 59 | # have to be reverted.
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| 60 | #
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| 61 | # Patch 3
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| 62 | # Binutils plugin support is dependent on libdl.so library.
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| 63 | # By default, the plugin support is switched off for all
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| 64 | # configure scripts of binutils. The only exception is configure
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| 65 | # script of ld 2.21 (and possibly above), where plugin support
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| 66 | # became mandatory (although not really needed).
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| 67 | #
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| 68 | # Patch 4
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| 69 | # Whereas most systems maps pid_t to signed int, HelenOS maps it
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| 70 | # to 64-bit unsigned integer (which is further masked by libposix to
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| 71 | # 64-bit signed integer). Because libiberty blindly expects pid_t to be
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| 72 | # signed int, there is some type incompatibility in libiberty
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| 73 | # files related to executing a subprocess. Since both as and ld are
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| 74 | # not runtime dependent on this functionality, the simplest solution is
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| 75 | # to patch libiberty to avoid compiler warnings.
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| 76 | #
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| 77 | # Patch 5
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| 78 | # When host and target system is equal, libbfd wants to compile a support
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| 79 | # for core files, which is dependent on non-standard headers sys/param.h
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| 80 | # and sys/user.h. Since we are cross compiling even when host and target
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| 81 | # are equal, variables related to core file support must be cleared.
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| 82 | #
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| 83 | # Patch 6
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| 84 | # There is a few occurences in binutils where POSIX function is declared
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| 85 | # and called without first including the corresponding header. Such
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| 86 | # declarations cause a problem to the linker, because all functions
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| 87 | # from libposix are prefixed with the posix_ prefix.
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| 88 | #
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| 89 | # Patch 7
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| 90 | # Implementation of fnmatch inside libiberty is not very friendly to the
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| 91 | # non-GNU libc which implements its own native fnmatch. To resolve this
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| 92 | # incompatibility, libiberty fnmatch has to be manually hidden.
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| 93 | #
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| 94 | # Patch 8
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| 95 | # When building binutils for arm32 target, there is a conflict with
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| 96 | # libposix function name redefinitons in one of the arm-specific files.
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| 97 | #
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| 98 |
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| 99 | case "$1" in
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| 100 | "do")
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| 101 | # Backup original files.
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| 102 | cp -f "$2/configure" "$2/configure.backup"
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| 103 | cp -f "$2/bfd/configure" "$2/bfd/configure.backup"
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| 104 | cp -f "$2/gas/configure" "$2/gas/configure.backup"
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| 105 | cp -f "$2/gas/config/tc-arm.c" "$2/gas/config/tc-arm.c.backup"
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| 106 | cp -f "$2/intl/configure" "$2/intl/configure.backup"
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| 107 | cp -f "$2/ld/configure" "$2/ld/configure.backup"
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| 108 | cp -f "$2/libiberty/configure" "$2/libiberty/configure.backup"
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| 109 | cp -f "$2/libiberty/Makefile.in" "$2/libiberty/Makefile.in.backup"
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| 110 | cp -f "$2/include/fnmatch.h" "$2/include/fnmatch.h.backup"
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| 111 | cp -f "$2/libiberty/fnmatch.c" "$2/libiberty/fnmatch.c.backup"
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| 112 | cp -f "$2/libiberty/pex-common.h" "$2/libiberty/pex-common.h.backup"
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| 113 | cp -f "$2/libiberty/xstrerror.c" "$2/libiberty/xstrerror.c.backup"
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| 114 | cp -f "$2/opcodes/configure" "$2/opcodes/configure.backup"
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| 115 |
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| 116 | # Patch main binutils configure script.
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| 117 | cat "$2/configure.backup" | \
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| 118 | # See Patch 1.
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| 119 | sed 's/^cross_compiling=no/cross_compiling=yes/g' \
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| 120 | > "$2/configure"
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| 121 |
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| 122 | # Patch bfd configure script.
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| 123 | cat "$2/bfd/configure.backup" | \
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| 124 | # See Patch 1.
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| 125 | sed 's/^cross_compiling=no/cross_compiling=yes/g' | \
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| 126 | # See Patch 5.
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| 127 | sed 's/COREFILE=".*"/COREFILE='\'\''/g' | \
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| 128 | sed 's/COREFILE=[^ ]*/COREFILE='\'\''/g' \
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| 129 | > "$2/bfd/configure"
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| 130 |
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| 131 | # Patch gas configure script.
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| 132 | cat "$2/gas/configure.backup" | \
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| 133 | # See Patch 1.
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| 134 | sed 's/^cross_compiling=no/cross_compiling=yes/g' \
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| 135 | > "$2/gas/configure"
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| 136 |
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| 137 | # Patch gas tc-arm.c.
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| 138 | cat "$2/gas/config/tc-arm.c.backup" | \
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| 139 | # See Patch 8.
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| 140 | sed 's/\(#include "dwarf2dbg.h"\)/\1\n#undef div/g' \
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| 141 | > "$2/gas/config/tc-arm.c"
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| 142 |
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| 143 | # Patch intl configure script.
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| 144 | cat "$2/intl/configure.backup" | \
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| 145 | # See Patch 1.
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| 146 | sed 's/^cross_compiling=no/cross_compiling=yes/g' \
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| 147 | > "$2/intl/configure"
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| 148 |
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| 149 | # Patch ld configure script.
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| 150 | cat "$2/ld/configure.backup" | \
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| 151 | # See Patch 1.
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| 152 | sed 's/^cross_compiling=no/cross_compiling=yes/g' | \
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| 153 | # See Patch 3.
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| 154 | sed 's/^enable_plugins=yes/enable_plugins=no/g' \
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| 155 | > "$2/ld/configure"
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| 156 |
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| 157 | # Patch libiberty configure script.
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| 158 | cat "$2/libiberty/configure.backup" | \
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| 159 | # See Patch 1.
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| 160 | sed 's/^cross_compiling=no/cross_compiling=yes/g' \
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| 161 | > "$2/libiberty/configure"
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| 162 |
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| 163 | # Hide libiberty fnmatch implementation.
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| 164 | # See Patch 7.
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| 165 | mv -f "$2/include/fnmatch.h" "$2/include/fnmatch_hide.h"
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| 166 | (
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| 167 | # Avoid compiler warning for empty compilation unit.
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| 168 | echo 'char __fnmatch_hide(void);'
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| 169 | echo 'char __fnmatch_hide(void) { return 0; }'
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| 170 | echo '#define __GNU_LIBRARY__'
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| 171 | cat "$2/libiberty/fnmatch.c.backup"
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| 172 | ) > "$2/libiberty/fnmatch.c"
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| 173 | mv -f "$2/libiberty/fnmatch.c" "$2/libiberty/fnmatch_hide.c"
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| 174 | cat "$2/libiberty/Makefile.in.backup" | \
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| 175 | sed 's/fnmatch/fnmatch_hide/g' \
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| 176 | > "$2/libiberty/Makefile.in"
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| 177 |
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| 178 | # Patch libiberty pex-common.h.
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| 179 | cat "$2/libiberty/pex-common.h.backup" | \
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| 180 | # See Patch 4.
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| 181 | sed 's/pid_t (\*wait)/int (*wait)/g' \
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| 182 | > "$2/libiberty/pex-common.h"
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| 183 |
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| 184 | # Patch libiberty xstrerror.c.
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| 185 | # See Patch 6.
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| 186 | (
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| 187 | echo '#include <string.h>'
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| 188 | echo '#define DONT_DECLARE_STRERROR'
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| 189 | cat "$2/libiberty/xstrerror.c.backup"
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| 190 | ) > "$2/libiberty/xstrerror.c"
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| 191 |
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| 192 | # Patch opcodes configure script.
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| 193 | cat "$2/opcodes/configure.backup" | \
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| 194 | # See Patch 1.
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| 195 | sed 's/^cross_compiling=no/cross_compiling=yes/g' | \
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| 196 | # See Patch 2.
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| 197 | sed 's/BUILD_LIBS=-liberty/BUILD_LIBS=..\/libiberty\/libiberty.a/g' \
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| 198 | > "$2/opcodes/configure"
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| 199 |
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| 200 | ;;
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| 201 | "undo")
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| 202 | # Restore original files.
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| 203 | mv -f "$2/configure.backup" "$2/configure"
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| 204 | mv -f "$2/bfd/configure.backup" "$2/bfd/configure"
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| 205 | mv -f "$2/gas/configure.backup" "$2/gas/configure"
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| 206 | mv -f "$2/gas/config/tc-arm.c.backup" "$2/gas/config/tc-arm.c"
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| 207 | mv -f "$2/intl/configure.backup" "$2/intl/configure"
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| 208 | mv -f "$2/ld/configure.backup" "$2/ld/configure"
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| 209 | mv -f "$2/libiberty/configure.backup" "$2/libiberty/configure"
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| 210 | mv -f "$2/libiberty/Makefile.in.backup" "$2/libiberty/Makefile.in"
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| 211 | rm -f "$2/include/fnmatch_hide.h" "$2/libiberty/fnmatch_hide.c"
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| 212 | mv -f "$2/include/fnmatch.h.backup" "$2/include/fnmatch.h"
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| 213 | mv -f "$2/libiberty/fnmatch.c.backup" "$2/libiberty/fnmatch.c"
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| 214 | mv -f "$2/libiberty/pex-common.h.backup" "$2/libiberty/pex-common.h"
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| 215 | mv -f "$2/libiberty/xstrerror.c.backup" "$2/libiberty/xstrerror.c"
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| 216 | mv -f "$2/opcodes/configure.backup" "$2/opcodes/configure"
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| 217 | ;;
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| 218 | *)
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| 219 | ;;
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| 220 | esac
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| 221 |
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