1#! /bin/sh
2
3# Copyright (C) 2001-2018 Free Software Foundation, Inc.
4# This file is part of GCC.
5
6# GCC 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, or (at your option)
9# any later version.
10
11# GCC 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.
15
16# You should have received a copy of the GNU General Public License
17# along with GCC; see the file COPYING3.  If not see
18# <http://www.gnu.org/licenses/>.
19
20
21# Generate gcc's various configuration headers:
22# config.h, tconfig.h, bconfig.h, tm.h, libgcc_tm.h, and tm_p.h.
23# $1 is the file to generate.  DEFINES, HEADERS, and possibly
24# TARGET_CPU_DEFAULT are expected to be set in the environment.
25
26if [ -z "$1" ]; then
27    echo "Usage: DEFINES='list' HEADERS='list' \\" >&2
28    echo "  [TARGET_CPU_DEFAULT='default'] mkconfig.sh FILE" >&2
29    exit 1
30fi
31
32output=$1
33rm -f ${output}T
34
35# This converts a file name into header guard macro format.
36hg_sed_expr='y,abcdefghijklmnopqrstuvwxyz./,ABCDEFGHIJKLMNOPQRSTUVWXYZ__,'
37header_guard=GCC_`echo ${output} | sed -e ${hg_sed_expr}`
38
39# Add multiple inclusion protection guard, part one.
40echo "#ifndef ${header_guard}" >> ${output}T
41echo "#define ${header_guard}" >> ${output}T
42
43# A special test to ensure that build-time files don't blindly use
44# config.h.
45if test x"$output" = x"config.h"; then
46  echo "#ifdef GENERATOR_FILE" >> ${output}T
47  echo "#error config.h is for the host, not build, machine." >> ${output}T
48  echo "#endif" >> ${output}T
49fi
50
51# Define TARGET_CPU_DEFAULT if the system wants one.
52# This substitutes for lots of *.h files.
53if [ "$TARGET_CPU_DEFAULT" != "" ]; then
54    echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)" >> ${output}T
55fi
56
57# Provide defines for other macros set in config.gcc for this file.
58for def in $DEFINES; do
59    echo "#ifndef $def" | sed 's/=.*//' >> ${output}T
60    echo "# define $def" | sed 's/=/ /' >> ${output}T
61    echo "#endif" >> ${output}T
62done
63
64# The first entry in HEADERS may be auto-FOO.h ;
65# it wants to be included even when not -DIN_GCC.
66# Postpone including defaults.h until after the insn-*
67# headers, so that the HAVE_* flags are available
68# when defaults.h gets included.
69postpone_defaults_h="no"
70if [ -n "$HEADERS" ]; then
71    set $HEADERS
72    case "$1" in auto-* )
73	echo "#include \"$1\"" >> ${output}T
74	shift
75	;;
76    esac
77    if [ $# -ge 1 ]; then
78	echo '#ifdef IN_GCC' >> ${output}T
79	for file in "$@"; do
80	    if test x"$file" = x"defaults.h"; then
81		postpone_defaults_h="yes"
82	    else
83		echo "# include \"$file\"" >> ${output}T
84	    fi
85	done
86	echo '#endif' >> ${output}T
87    fi
88fi
89
90# If this is tm.h, now include insn-flags.h only if IN_GCC is defined
91# but neither GENERATOR_FILE nor USED_FOR_TARGET is defined.  (Much of this
92# is temporary.)
93
94case $output in
95    tm.h )
96        cat >> ${output}T <<EOF
97#if defined IN_GCC && !defined GENERATOR_FILE && !defined USED_FOR_TARGET
98# include "insn-flags.h"
99#endif
100#if defined IN_GCC && !defined GENERATOR_FILE
101# include "insn-modes.h"
102#endif
103EOF
104    ;;
105esac
106
107# If we postponed including defaults.h, add the #include now.
108if test x"$postpone_defaults_h" = x"yes"; then
109    echo "# include \"defaults.h\"" >> ${output}T
110fi
111
112# Add multiple inclusion protection guard, part two.
113echo "#endif /* ${header_guard} */" >> ${output}T
114
115# Avoid changing the actual file if possible.
116if [ -f $output ] && cmp ${output}T $output >/dev/null 2>&1; then
117    echo $output is unchanged >&2
118    rm -f ${output}T
119else
120    mv -f ${output}T $output
121fi
122
123# Touch a stamp file for Make's benefit.
124rm -f cs-$output
125echo timestamp > cs-$output
126