1 #!/bin/sh 2 # 3 # Copyright (C) 2012 The Android Open Source Project 4 # 5 # Licensed under the Apache License, Version 2.0 (the "License"); 6 # you may not use this file except in compliance with the License. 7 # You may obtain a copy of the License at 8 # 9 # http://www.apache.org/licenses/LICENSE-2.0 10 # 11 # Unless required by applicable law or agreed to in writing, software 12 # distributed under the License is distributed on an "AS IS" BASIS, 13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 # See the License for the specific language governing permissions and 15 # limitations under the License. 16 # 17 # This shell script is used to rebuild the gcc and toolchain binaries 18 # for the Android NDK. 19 # 20 21 PROGDIR=$(dirname "$0") 22 . "$PROGDIR/prebuilt-common.sh" 23 24 PROGRAM_PARAMETERS="<dst-dir>" 25 PROGRAM_DESCRIPTION="\ 26 This script allows you to generate a 'wrapper toolchain', i.e. a set of 27 simple scripts that act as toolchain binaries (e.g. my-cc, my-c++, my-ld, 28 etc...) but call another installed toolchain instead, possibly with additional 29 command-line options. 30 31 For example, imagine we want a toolchain that generates 32-bit binaries while 32 running on a 64-bit system, we could call this script as: 33 34 $PROGNAME --cflags="-m32" --cxxflags="-m32" --ldflags="-m32" /tmp/my-toolchain 35 36 Then, this will create programs like: 37 38 /tmp/my-toolchain/my-cc 39 /tmp/my-toolchain/my-gcc 40 /tmp/my-toolchain/my-c++ 41 /tmp/my-toolchain/my-g++ 42 /tmp/my-toolchain/my-ld 43 ... 44 45 Where the compilers and linkers will add the -m32 flag to the command-line before 46 calling the host version of 'cc', 'gcc', etc... 47 48 Generally speaking: 49 50 - The 'destination toolchain' is the one that will be called by the 51 generated wrapper script. It is identified by a 'destination prefix' 52 (e.g. 'x86_64-linux-gnu-', note the dash at the end). 53 54 If is empty by default, but can be changed with --dst-prefix=<prefix> 55 56 - The 'source prefix' is the prefix added to the generated toolchain scripts, 57 it is 'my-' by default, but can be changed with --src-prefix=<prefix> 58 59 - You can use --cflags, --cxxflags, --ldflags, etc... to add extra 60 command-line flags for the generated compiler, linker, etc.. scripts 61 62 " 63 64 DEFAULT_SRC_PREFIX="my-" 65 DEFAULT_DST_PREFIX="" 66 67 SRC_PREFIX=$DEFAULT_SRC_PREFIX 68 register_var_option "--src-prefix=<prefix>" SRC_PREFIX "Set source toolchain prefix" 69 70 DST_PREFIX=$DEFAULT_DST_PREFIX 71 register_var_option "--dst-prefix=<prefix>" DST_PREFIX "Set destination toolchain prefix" 72 73 EXTRA_CFLAGS= 74 register_var_option "--cflags=<options>" EXTRA_CFLAGS "Add extra C compiler flags" 75 76 EXTRA_CXXFLAGS= 77 register_var_option "--cxxflags=<options>" EXTRA_CXXFLAGS "Add extra C++ compiler flags" 78 79 EXTRA_LDFLAGS= 80 register_var_option "--ldflags=<options>" EXTRA_LDFLAGS "Add extra linker flags" 81 82 EXTRA_ASFLAGS= 83 register_var_option "--asflags=<options>" EXTRA_ASFLAGS "Add extra assembler flags" 84 85 EXTRA_ARFLAGS= 86 register_var_option "--arflags=<options>" EXTRA_ARFLAGS "Add extra archiver flags" 87 88 CCACHE= 89 register_var_option "--ccache=<prefix>" CCACHE "Use ccache compiler driver" 90 91 PROGRAMS="cc gcc c++ g++ cpp as ld ar ranlib strip strings nm objdump dlltool" 92 register_var_option "--programs=<list>" PROGRAMS "List of programs to generate wrapper for" 93 94 extract_parameters "$@" 95 96 PROGRAMS=$(commas_to_spaces "$PROGRAMS") 97 if [ -z "$PROGRAMS" ]; then 98 panic "Empty program list, nothing to do!" 99 fi 100 101 DST_DIR="$PARAMETERS" 102 if [ -z "$DST_DIR" ]; then 103 panic "Please provide a destination directory as a parameter! See --help for details." 104 fi 105 106 mkdir -p "$DST_DIR" 107 fail_panic "Could not create destination directory: $DST_DIR" 108 109 # Check if mingw compiler has dlfcn.h 110 # $1: mignw compiler 111 # 112 mingw_has_dlfcn_h () 113 { 114 local CC="$1" 115 116 if [ ! -f "$CC" ]; then 117 # compiler not found 118 return 1 119 fi 120 "$CC" -xc /dev/null -dM -E | grep -q MINGW 121 if [ $? != 0 ]; then 122 # not a mingw compiler 123 return 1 124 fi 125 126 "$CC" -xc -c /dev/null -include dlfcn.h -o /dev/null > /dev/null 2>&1 127 } 128 129 # Generate a small wrapper program 130 # 131 # $1: program name, without any prefix (e.g. gcc, g++, ar, etc..) 132 # $2: source prefix (e.g. 'i586-mingw32msvc-') 133 # $3: destination prefix (e.g. 'i586-px-mingw32msvc-') 134 # $4: destination directory for the generate program 135 # 136 gen_wrapper_program () 137 { 138 local PROG="$1" 139 local SRC_PREFIX="$2" 140 local DST_PREFIX="$3" 141 local DST_FILE="$4/${SRC_PREFIX}$PROG" 142 local FLAGS="" 143 local LDFLAGS="" 144 145 case $PROG in 146 cc|gcc|cpp) 147 FLAGS=$FLAGS" $EXTRA_CFLAGS" 148 if mingw_has_dlfcn_h ${DST_PREFIX}$PROG; then 149 LDFLAGS="-ldl" 150 fi 151 ;; 152 c++|g++) 153 FLAGS=$FLAGS" $EXTRA_CXXFLAGS" 154 if mingw_has_dlfcn_h ${DST_PREFIX}$PROG; then 155 LDFLAGS="-ldl" 156 fi 157 ;; 158 ar) FLAGS=$FLAGS" $EXTRA_ARFLAGS";; 159 as) FLAGS=$FLAGS" $EXTRA_ASFLAGS";; 160 ld|ld.bfd|ld.gold) FLAGS=$FLAGS" $EXTRA_LDFLAGS";; 161 esac 162 163 if [ -n "$CCACHE" ]; then 164 DST_PREFIX=$CCACHE" "$DST_PREFIX 165 fi 166 167 cat > "$DST_FILE" << EOF 168 #!/bin/sh 169 # Auto-generated, do not edit 170 ${DST_PREFIX}$PROG $FLAGS "\$@" $LDFLAGS 171 EOF 172 chmod +x "$DST_FILE" 173 log "Generating: ${SRC_PREFIX}$PROG" 174 } 175 176 log "Generating toolchain wrappers in: $DST_DIR" 177 178 for PROG in $PROGRAMS; do 179 gen_wrapper_program $PROG "$SRC_PREFIX" "$DST_PREFIX" "$DST_DIR" 180 done 181 182 log "Done!" 183
