mkconfig.sh revision 96263 
1#! /bin/sh
2
3# Generate gcc's config.h, which is not your normal autoconf-generated
4# config.h (that's auto-(host|build).h).  $1 is the file to generate.
5# HEADERS, DEFINES, and possibly TARGET_CPU_DEFAULT are expected to be
6# set in the environment.
7
8if [ -z "$1" ]; then
9    echo "Usage: HEADERS='list' DEFINES='list' mkconfig.sh FILE" >&2
10    exit 1
11fi
12
13output=$1
14rm -f ${output}T
15
16# Define TARGET_CPU_DEFAULT if the system wants one.
17# This substitutes for lots of *.h files.
18if [ "$TARGET_CPU_DEFAULT" != "" ]; then
19    echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)" >> ${output}T
20fi
21
22# The first entry in HEADERS may be auto-host.h or auto-build.h;
23# it wants to be included even when not -DIN_GCC.
24if [ -n "$HEADERS" ]; then
25    set $HEADERS; first=$1
26    case $first in auto-* )
27	echo "#include \"$first\"" >> ${output}T
28	shift
29	HEADERS=$*
30	;;
31    esac
32fi
33
34# Provide three core typedefs used by everything, if we are compiling
35# GCC.  These used to be found in rtl.h and tree.h, but this is no
36# longer practical. Providing these in config.h/tconfig.h/hconfig.h
37# rather than system.h allows the typedefs to be used anywhere in GCC.
38case $output in 
39    *config.h | *hconfig.h | *tconfig.h)
40        cat >> ${output}T <<EOF
41#ifdef IN_GCC
42/* Provide three core typedefs used by everything, if we are compiling
43   GCC.  These used to be found in rtl.h and tree.h, but this is no
44   longer practical.  Providing these here rather that system.h allows
45   the typedefs to be used everywhere within GCC. */
46struct rtx_def;
47typedef struct rtx_def *rtx;
48struct rtvec_def;
49typedef struct rtvec_def *rtvec;
50union tree_node;
51typedef union tree_node *tree;
52#endif
53EOF
54        ;;
55esac
56
57if [ -n "$HEADERS" ]; then
58    echo '#ifdef IN_GCC' >> ${output}T
59    for file in $HEADERS; do
60	echo "# include \"$file\"" >> ${output}T
61    done
62    echo '#endif' >> ${output}T
63fi
64
65for def in $DEFINES; do
66    echo "#ifndef $def" | sed 's/=.*//' >> ${output}T
67    echo "# define $def" | sed 's/=/ /' >> ${output}T
68    echo "#endif" >> ${output}T
69done
70
71# If this is tm_p.h, include tm-preds.h unconditionally.
72# If this is tconfig.h or hconfig.h, include no more files.
73# Otherwise, include insn-constants.h and insn-flags.h,
74# but only if GENERATOR_FILE is not defined.
75case $output in
76    *tm_p.h)
77	echo "#include \"tm-preds.h\"" >> ${output}T
78    ;;
79    *tconfig.h | *hconfig.h)
80    ;;
81    *)
82        cat >> ${output}T <<EOF
83#ifndef GENERATOR_FILE
84# include "insn-constants.h"
85# include "insn-flags.h"
86#endif
87EOF
88    ;;
89esac
90
91# Avoid changing the actual file if possible.
92if [ -f $output ] && cmp ${output}T $output >/dev/null 2>&1; then
93    echo $output is unchanged >&2
94    rm -f ${output}T
95else
96    mv -f ${output}T $output
97fi
98
99# Touch a stamp file for Make's benefit.
100rm -f cs-$output
101echo timestamp > cs-$output
102