1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
dnl @synopsis AX_PREFIX_CONFIG_H [(OUTPUT-HEADER [,PREFIX [,ORIG-HEADER]])]
dnl
dnl This is a new variant from ac_prefix_config_ this one will use a
dnl lowercase-prefix if the config-define was starting with a
dnl lowercase-char, e.g. "#define const", "#define restrict", or
dnl "#define off_t", (and this one can live in another directory, e.g.
dnl testpkg/config.h therefore I decided to move the output-header to
dnl be the first arg)
dnl
dnl takes the usual config.h generated header file; looks for each of
dnl the generated "#define SOMEDEF" lines, and prefixes the defined
dnl name (ie. makes it "#define PREFIX_SOMEDEF". The result is written
dnl to the output config.header file. The PREFIX is converted to
dnl uppercase for the conversions.
dnl
dnl Defaults:
dnl
dnl OUTPUT-HEADER = $PACKAGE-config.h
dnl PREFIX = $PACKAGE
dnl ORIG-HEADER, from AM_CONFIG_HEADER(config.h)
dnl
dnl Your configure.ac script should contain both macros in this order,
dnl and unlike the earlier variations of this prefix-macro it is okay
dnl to place the AX_PREFIX_CONFIG_H call before the AC_OUTPUT
dnl invokation.
dnl
dnl Example:
dnl
dnl AC_INIT(config.h.in) # config.h.in as created by "autoheader"
dnl AM_INIT_AUTOMAKE(testpkg, 0.1.1) # makes #undef VERSION and PACKAGE
dnl AM_CONFIG_HEADER(config.h) # prep config.h from config.h.in
dnl AX_PREFIX_CONFIG_H(mylib/_config.h) # prep mylib/_config.h from it..
dnl AC_MEMORY_H # makes "#undef NEED_MEMORY_H"
dnl AC_C_CONST_H # makes "#undef const"
dnl AC_OUTPUT(Makefile) # creates the "config.h" now
dnl # and also mylib/_config.h
dnl
dnl if the argument to AX_PREFIX_CONFIG_H would have been omitted then
dnl the default outputfile would have been called simply
dnl "testpkg-config.h", but even under the name "mylib/_config.h" it
dnl contains prefix-defines like
dnl
dnl #ifndef TESTPKG_VERSION
dnl #define TESTPKG_VERSION "0.1.1"
dnl #endif
dnl #ifndef TESTPKG_NEED_MEMORY_H
dnl #define TESTPKG_NEED_MEMORY_H 1
dnl #endif
dnl #ifndef _testpkg_const
dnl #define _testpkg_const _const
dnl #endif
dnl
dnl and this "mylib/_config.h" can be installed along with other
dnl header-files, which is most convenient when creating a shared
dnl library (that has some headers) where some functionality is
dnl dependent on the OS-features detected at compile-time. No need to
dnl invent some "mylib-confdefs.h.in" manually. :-)
dnl
dnl Note that some AC_DEFINEs that end up in the config.h file are
dnl actually self-referential - e.g. AC_C_INLINE, AC_C_CONST, and the
dnl AC_TYPE_OFF_T say that they "will define inline|const|off_t if the
dnl system does not do it by itself". You might want to clean up about
dnl these - consider an extra mylib/conf.h that reads something like:
dnl
dnl #include <mylib/_config.h>
dnl #ifndef _testpkg_const
dnl #define _testpkg_const const
dnl #endif
dnl
dnl and then start using _testpkg_const in the header files. That is
dnl also a good thing to differentiate whether some library-user has
dnl starting to take up with a different compiler, so perhaps it could
dnl read something like this:
dnl
dnl #ifdef _MSC_VER
dnl #include <mylib/_msvc.h>
dnl #else
dnl #include <mylib/_config.h>
dnl #endif
dnl #ifndef _testpkg_const
dnl #define _testpkg_const const
dnl #endif
dnl
dnl @category Misc
dnl @author Guido U. Draheim <guidod@gmx.de>
dnl @version 2003-07-03
dnl @license GPLWithACException
AC_DEFUN([AX_PREFIX_CONFIG_H],[dnl
AC_PROVIDE_IFELSE([AC_CONFIG_HEADERS], dnl
,[warning if no AC_CONFIG_HEADERS precedes $ ])dnl
AC_CONFIG_COMMANDS([ifelse($1,,$PACKAGE-config.h,$1)],[dnl
AS_VAR_PUSHDEF([_OUT],[ac_prefix_conf_OUT])dnl
AS_VAR_PUSHDEF([_DEF],[ac_prefix_conf_DEF])dnl
AS_VAR_PUSHDEF([_PKG],[ac_prefix_conf_PKG])dnl
AS_VAR_PUSHDEF([_LOW],[ac_prefix_conf_LOW])dnl
AS_VAR_PUSHDEF([_UPP],[ac_prefix_conf_UPP])dnl
AS_VAR_PUSHDEF([_INP],[ac_prefix_conf_INP])dnl
m4_pushdef([_script],[conftest.prefix])dnl
m4_pushdef([_symbol],[m4_cr_Letters[]m4_cr_digits[]_])dnl
_OUT=`echo ifelse($1, , $PACKAGE-config.h, $1)`
_DEF=`echo _$_OUT | sed -e "y:m4_cr_letters:m4_cr_LETTERS[]:" -e "s/@<:@^m4_cr_Letters@:>@/_/g"`
_PKG=`echo ifelse($2, , $PACKAGE, $2)`
_LOW=`echo _$_PKG | sed -e "y:m4_cr_LETTERS-:m4_cr_letters[]_:"`
_UPP=`echo $_PKG | sed -e "y:m4_cr_letters-:m4_cr_LETTERS[]_:" -e "/^@<:@m4_cr_digits@:>@/s/^/_/"`
_INP=`echo "ifelse($3,,,$3)" | sed -e 's/ *//'`
if test ".$_INP" = "."; then
for ac_file in : $CONFIG_HEADERS; do test "_$ac_file" = _: && continue
case "$ac_file" in
*.h) _INP=$ac_file ;;
*)
esac
test ".$_INP" != "." && break
done
fi
if test ".$_INP" = "."; then
case "$_OUT" in
*/*) _INP=`basename "$_OUT"`
;;
*-*) _INP=`echo "$_OUT" | sed -e "s/@<:@_symbol@:>@*-//"`
;;
*) _INP=config.h
;;
esac
fi
if test -z "$_PKG" ; then
AC_MSG_ERROR([no prefix for _PREFIX_PKG_CONFIG_H])
else
if test ! -f "$_INP" ; then if test -f "$srcdir/$_INP" ; then
_INP="$srcdir/$_INP"
fi fi
AC_MSG_NOTICE(creating $_OUT - prefix $_UPP for $_INP defines)
if test -f $_INP ; then
echo "s/^@%:@undef *\\(@<:@m4_cr_LETTERS[]_@:>@\\)/@%:@undef $_UPP""_\\1/" > _script
echo "s/^@%:@undef *\\(@<:@m4_cr_letters@:>@\\)/@%:@undef $_LOW""_\\1/" >> _script
echo "s/^@%:@def[]ine *\\(@<:@m4_cr_LETTERS[]_@:>@@<:@_symbol@:>@*\\)\\(.*\\)/@%:@ifndef $_UPP""_\\1 \\" >> _script
echo "@%:@def[]ine $_UPP""_\\1 \\2 \\" >> _script
echo "@%:@endif/" >>_script
echo "s/^@%:@def[]ine *\\(@<:@m4_cr_letters@:>@@<:@_symbol@:>@*\\)\\(.*\\)/@%:@ifndef $_LOW""_\\1 \\" >> _script
echo "@%:@define $_LOW""_\\1 \\2 \\" >> _script
echo "@%:@endif/" >> _script
# now executing _script on _DEF input to create _OUT output file
echo "@%:@ifndef $_DEF" >$tmp/pconfig.h
echo "@%:@def[]ine $_DEF 1" >>$tmp/pconfig.h
echo ' ' >>$tmp/pconfig.h
echo /'*' $_OUT. Generated automatically at end of configure. '*'/ >>$tmp/pconfig.h
sed -f _script $_INP >>$tmp/pconfig.h
echo ' ' >>$tmp/pconfig.h
echo '/* once:' $_DEF '*/' >>$tmp/pconfig.h
echo "@%:@endif" >>$tmp/pconfig.h
if cmp -s $_OUT $tmp/pconfig.h 2>/dev/null; then
AC_MSG_NOTICE([$_OUT is unchanged])
else
ac_dir=`AS_DIRNAME(["$_OUT"])`
AS_MKDIR_P(["$ac_dir"])
rm -f "$_OUT"
mv $tmp/pconfig.h "$_OUT"
fi
cp _script _configs.sed
else
AC_MSG_ERROR([input file $_INP does not exist - skip generating $_OUT])
fi
rm -f conftest.*
fi
m4_popdef([_symbol])dnl
m4_popdef([_script])dnl
AS_VAR_POPDEF([_INP])dnl
AS_VAR_POPDEF([_UPP])dnl
AS_VAR_POPDEF([_LOW])dnl
AS_VAR_POPDEF([_PKG])dnl
AS_VAR_POPDEF([_DEF])dnl
AS_VAR_POPDEF([_OUT])dnl
],[PACKAGE="$PACKAGE"])])
dnl implementation note: a bug report (31.5.2005) from Marten Svantesson points
dnl out a problem where `echo "\1"` results in a Control-A. The unix standard
dnl http://www.opengroup.org/onlinepubs/000095399/utilities/echo.html
dnl defines all backslash-sequences to be inherently non-portable asking
dnl for replacement mit printf. Some old systems had problems with that
dnl one either. However, the latest libtool (!) release does export an $ECHO
dnl (and $echo) that does the right thing - just one question is left: what
dnl was the first version to have it? Is it greater 2.58 ?
|
