2 # Wrapper around gcc to tweak the output in various ways when running
5 # Copyright (C) 2010-2012 Free Software Foundation, Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 3 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19 # This program requires gdb and objcopy in addition to gcc.
20 # The default values are gdb from the build tree and objcopy from $PATH.
21 # They may be overridden by setting environment variables GDB and OBJCOPY
22 # respectively. Note that GDB should contain the gdb binary as well as the
23 # -data-directory flag, e.g., "foo/gdb -data-directory foo/data-directory".
24 # We assume the current directory is either $obj/gdb or $obj/gdb/testsuite.
28 # bash$ cd $objdir/gdb/testsuite
30 # CC_FOR_TARGET="/bin/sh $srcdir/gdb/contrib/cc-with-tweaks.sh ARGS gcc" \
31 # CXX_FOR_TARGET="/bin/sh $srcdir/gdb/contrib/cc-with-tweaks.sh ARGS g++"
33 # For documentation on index files: info -f gdb.info -n "Index Files"
34 # For information about 'dwz', see the announcement:
35 # http://gcc.gnu.org/ml/gcc/2012-04/msg00686.html
36 # (More documentation is to come.)
38 # ARGS determine what is done. They can be:
39 # -z compress using dwz
40 # -m compress using dwz -m
42 # If nothing is given, no changes are made
44 myname=cc-with-tweaks.sh
50 GDB="./gdb -data-directory data-directory"
53 GDB="../gdb -data-directory ../data-directory"
56 GDB="../../gdb -data-directory ../../data-directory"
58 echo "$myname: unable to find usable gdb" >&2
63 OBJCOPY=${OBJCOPY:-objcopy}
68 next_is_output_file=no
75 while [ $# -gt 0 ]; do
78 -i) want_index=true ;;
79 -m) want_multi=true ;;
87 if [ "$next_is_output_file" = "yes" ]
90 next_is_output_file=no
94 # Poor man's gcc argument parser.
95 # We don't need to handle all arguments, we just need to know if we're
96 # doing a link and what the output file is.
97 # It's not perfect, but it seems to work well enough for the task at hand.
100 "-E") have_link=no ;;
101 "-S") have_link=no ;;
102 "-o") next_is_output_file=yes ;;
106 if [ "$next_is_output_file" = "yes" ]
108 echo "$myname: Unable to find output file" >&2
112 if [ "$have_link" = "no" ]
118 index_file="${output_file}.gdb-index"
119 if [ "$want_index" = true ] && [ -f "$index_file" ]
121 echo "$myname: Index file $index_file exists, won't clobber." >&2
125 output_dir="${output_file%/*}"
126 [ "$output_dir" = "$output_file" ] && output_dir="."
130 [ $rc != 0 ] && exit $rc
131 if [ ! -f "$output_file" ]
133 echo "$myname: Internal error: $output_file missing." >&2
137 if [ "$want_index" = true ]; then
138 $GDB --batch-silent -nx -ex "set auto-load no" -ex "file $output_file" -ex "save gdb-index $output_dir"
140 [ $rc != 0 ] && exit $rc
142 # GDB might not always create an index. Cope.
143 if [ -f "$index_file" ]
145 $OBJCOPY --add-section .gdb_index="$index_file" \
146 --set-section-flags .gdb_index=readonly \
147 "$output_file" "$output_file"
152 [ $rc != 0 ] && exit $rc
155 if [ "$want_dwz" = true ]; then
156 $DWZ "$output_file" > /dev/null 2>&1
157 elif [ "$want_multi" = true ]; then
158 cp $output_file ${output_file}.alt
159 $DWZ -m ${output_file}.dwz "$output_file" ${output_file}.alt > /dev/null 2>&1