mkconfig.sh revision 90075 
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# We used to exec > $output.T but apparently this has bugs.
17# Use a redirected subshell instead.
18(
19
20# Define TARGET_CPU_DEFAULT if the system wants one.
21# This substitutes for lots of *.h files.
22if [ "$TARGET_CPU_DEFAULT" != "" ]; then
23    echo "#define TARGET_CPU_DEFAULT ($TARGET_CPU_DEFAULT)"
24fi
25
26# The first entry in HEADERS may be auto-host.h or auto-build.h;
27# it wants to be included even when not -DIN_GCC.
28if [ -n "$HEADERS" ]; then
29    set $HEADERS; first=$1
30    case $first in auto-* )
31	echo "#include \"$first\""
32	shift
33	HEADERS=$*
34	;;
35    esac
36fi
37
38# Provide three core typedefs used by everything, if we are compiling
39# GCC.  These used to be found in rtl.h and tree.h, but this is no
40# longer practical. Providing these in config.h/tconfig.h/hconfig.h
41# rather than system.h allows the typedefs to be used anywhere in GCC.
42case $output in 
43    *config.h | *hconfig.h | *tconfig.h)
44        echo "#ifdef IN_GCC"
45        echo "/* Provide three core typedefs used by everything, if we are compiling"
46        echo "   GCC.  These used to be found in rtl.h and tree.h, but this is no"
47        echo "   longer practical.  Providing these here rather that system.h allows"
48        echo "   the typedefs to be used everywhere within GCC. */"
49        echo "struct rtx_def;"
50        echo "typedef struct rtx_def *rtx;"
51        echo "struct rtvec_def;"
52        echo "typedef struct rtvec_def *rtvec;"
53        echo "union tree_node;"
54        echo "typedef union tree_node *tree;"
55        echo "#endif"
56        ;;
57esac
58
59if [ -n "$HEADERS" ]; then
60    echo '#ifdef IN_GCC'
61    for file in $HEADERS; do
62	echo "# include \"$file\""
63    done
64    echo '#endif'
65fi
66
67for def in $DEFINES; do
68    echo "#ifndef $def" | sed 's/=.*//'
69    echo "# define $def" | sed 's/=/ /'
70    echo "#endif"
71done
72
73# If this is tm_p.h, include tm-preds.h unconditionally.
74# If this is tconfig.h or hconfig.h, include no more files.
75# Otherwise, include insn-constants.h and insn-flags.h,
76# but only if GENERATOR_FILE is not defined.
77case $output in
78    *tm_p.h)
79	echo "#include \"tm-preds.h\""
80    ;;
81    *tconfig.h | *hconfig.h)
82    ;;
83    *)
84	echo "#ifndef GENERATOR_FILE"
85	echo "# include \"insn-constants.h\""
86	echo "# include \"insn-flags.h\""
87	echo "#endif"
88    ;;
89esac
90
91# Prevent obstack.c from thinking it can do i18n of its error message
92# when it's being linked against a build-side program.
93echo '#ifdef GENERATOR_FILE'
94echo '# undef ENABLE_NLS'
95echo '#endif'
96
97) > $output.T
98
99# Avoid changing the actual file if possible.
100if [ -f $output ] && cmp $output.T $output >/dev/null 2>&1; then
101    echo $output is unchanged >&2
102    rm -f $output.T
103else
104    mv -f $output.T $output
105fi
106
107# Touch a stamp file for Make's benefit.
108rm -f cs-$output
109echo timestamp > cs-$output
110