summaryrefslogtreecommitdiffstats
path: root/replace/libreplace_macros.m4
blob: 0f7db2980fba07eafbe5d42dc41b3769803facdb (plain)
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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
#
# This is a collection of useful autoconf macros
#

############################################
# Check if the compiler handles c99 struct initialization, and if not try -AC99 and -c99 flags
# Usage: LIBREPLACE_C99_STRUCT_INIT(success-action,failure-action)
# changes CFLAGS to add -AC99 or -c99 if needed
AC_DEFUN([LIBREPLACE_C99_STRUCT_INIT],
[
saved_CFLAGS="$CFLAGS";
c99_init=no
if test x"$c99_init" = x"no"; then
    AC_MSG_CHECKING(for C99 designated initializers)
    CFLAGS="$saved_CFLAGS";
    AC_TRY_COMPILE([#include <stdio.h>],
     [ struct foo {int x;char y;};
       struct foo bar = { .y = 'X', .x = 1 };	 
     ],
     [AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)])
fi
if test x"$c99_init" = x"no"; then
    AC_MSG_CHECKING(for C99 designated initializers with -AC99)
    CFLAGS="$saved_CFLAGS -AC99";
    AC_TRY_COMPILE([#include <stdio.h>],
     [ struct foo {int x;char y;};
       struct foo bar = { .y = 'X', .x = 1 };	 
     ],
     [AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)])
fi
if test x"$c99_init" = x"no"; then
    AC_MSG_CHECKING(for C99 designated initializers with -qlanglvl=extc99)
    CFLAGS="$saved_CFLAGS -qlanglvl=extc99";
    AC_TRY_COMPILE([#include <stdio.h>],
     [ struct foo {int x;char y;};
       struct foo bar = { .y = 'X', .x = 1 };	 
     ],
     [AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)])
fi
if test x"$c99_init" = x"no"; then
    AC_MSG_CHECKING(for C99 designated initializers with -qlanglvl=stdc99)
    CFLAGS="$saved_CFLAGS -qlanglvl=stdc99";
    AC_TRY_COMPILE([#include <stdio.h>],
     [ struct foo {int x;char y;};
       struct foo bar = { .y = 'X', .x = 1 };	 
     ],
     [AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)])
fi
if test x"$c99_init" = x"no"; then
    AC_MSG_CHECKING(for C99 designated initializers with -c99)
    CFLAGS="$saved_CFLAGS -c99"
    AC_TRY_COMPILE([#include <stdio.h>],
     [ struct foo {int x;char y;};
       struct foo bar = { .y = 'X', .x = 1 };	 
     ],
     [AC_MSG_RESULT(yes); c99_init=yes],[AC_MSG_RESULT(no)])
fi

if test "`uname`" = "HP-UX"; then
  if test "$ac_cv_c_compiler_gnu" = no; then
	# special override for broken HP-UX compiler - I can't find a way to test
	# this properly (its a compiler bug)
	CFLAGS="$CFLAGS -AC99";
	c99_init=yes;
  fi
fi

if test x"$c99_init" = x"yes"; then
    saved_CFLAGS=""
    $1
else
    CFLAGS="$saved_CFLAGS"
    saved_CFLAGS=""
    $2
fi
])

dnl AC_PROG_CC_FLAG(flag)
AC_DEFUN([AC_PROG_CC_FLAG],
[AC_CACHE_CHECK(whether ${CC-cc} accepts -$1, ac_cv_prog_cc_$1,
[echo 'void f(){}' > conftest.c
if test -z "`${CC-cc} -$1 -c conftest.c 2>&1`"; then
  ac_cv_prog_cc_$1=yes
else
  ac_cv_prog_cc_$1=no
fi
rm -f conftest*
])])

dnl see if a declaration exists for a function or variable
dnl defines HAVE_function_DECL if it exists
dnl AC_HAVE_DECL(var, includes)
AC_DEFUN([AC_HAVE_DECL],
[
 AC_CACHE_CHECK([for $1 declaration],ac_cv_have_$1_decl,[
    AC_TRY_COMPILE([$2],[int i = (int)$1],
        ac_cv_have_$1_decl=yes,ac_cv_have_$1_decl=no)])
 if test x"$ac_cv_have_$1_decl" = x"yes"; then
    AC_DEFINE([HAVE_]translit([$1], [a-z], [A-Z])[_DECL],1,[Whether $1() is available])
 fi
])


# AC_CHECK_LIB_EXT(LIBRARY, [EXT_LIBS], [FUNCTION],
#              [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
#              [ADD-ACTION-IF-FOUND],[OTHER-LIBRARIES])
# ------------------------------------------------------
#
# Use a cache variable name containing both the library and function name,
# because the test really is for library $1 defining function $3, not
# just for library $1.  Separate tests with the same $1 and different $3s
# may have different results.
#
# Note that using directly AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1_$3])
# is asking for trouble, since AC_CHECK_LIB($lib, fun) would give
# ac_cv_lib_$lib_fun, which is definitely not what was meant.  Hence
# the AS_LITERAL_IF indirection.
#
# FIXME: This macro is extremely suspicious.  It DEFINEs unconditionally,
# whatever the FUNCTION, in addition to not being a *S macro.  Note
# that the cache does depend upon the function we are looking for.
#
# It is on purpose we used `ac_check_lib_ext_save_LIBS' and not just
# `ac_save_LIBS': there are many macros which don't want to see `LIBS'
# changed but still want to use AC_CHECK_LIB_EXT, so they save `LIBS'.
# And ``ac_save_LIBS' is too tempting a name, so let's leave them some
# freedom.
AC_DEFUN([AC_CHECK_LIB_EXT],
[
AH_CHECK_LIB_EXT([$1])
ac_check_lib_ext_save_LIBS=$LIBS
LIBS="-l$1 $$2 $7 $LIBS"
AS_LITERAL_IF([$1],
      [AS_VAR_PUSHDEF([ac_Lib_ext], [ac_cv_lib_ext_$1])],
      [AS_VAR_PUSHDEF([ac_Lib_ext], [ac_cv_lib_ext_$1''])])dnl

m4_ifval([$3],
 [
    AH_CHECK_FUNC_EXT([$3])
    AS_LITERAL_IF([$1],
              [AS_VAR_PUSHDEF([ac_Lib_func], [ac_cv_lib_ext_$1_$3])],
              [AS_VAR_PUSHDEF([ac_Lib_func], [ac_cv_lib_ext_$1''_$3])])dnl
    AC_CACHE_CHECK([for $3 in -l$1], ac_Lib_func,
	[AC_TRY_LINK_FUNC($3,
                 [AS_VAR_SET(ac_Lib_func, yes);
		  AS_VAR_SET(ac_Lib_ext, yes)],
                 [AS_VAR_SET(ac_Lib_func, no);
		  AS_VAR_SET(ac_Lib_ext, no)])
	])
    AS_IF([test AS_VAR_GET(ac_Lib_func) = yes],
        [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_$3))])dnl
    AS_VAR_POPDEF([ac_Lib_func])dnl
 ],[
    AC_CACHE_CHECK([for -l$1], ac_Lib_ext,
	[AC_TRY_LINK_FUNC([main],
                 [AS_VAR_SET(ac_Lib_ext, yes)],
                 [AS_VAR_SET(ac_Lib_ext, no)])
	])
 ])
LIBS=$ac_check_lib_ext_save_LIBS

AS_IF([test AS_VAR_GET(ac_Lib_ext) = yes],
    [m4_default([$4], 
        [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1))
		case "$$2" in
		    *-l$1*)
			;;
		    *)
			$2="-l$1 $$2"
			;;
		esac])
		[$6]
	    ],
	    [$5])dnl
AS_VAR_POPDEF([ac_Lib_ext])dnl
])# AC_CHECK_LIB_EXT

# AH_CHECK_LIB_EXT(LIBNAME)
# ---------------------
m4_define([AH_CHECK_LIB_EXT],
[AH_TEMPLATE(AS_TR_CPP(HAVE_LIB$1),
             [Define to 1 if you have the `]$1[' library (-l]$1[).])])

dnl AC_SEARCH_LIBS_EXT(FUNCTION, SEARCH-LIBS, EXT_LIBS,
dnl                    [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
dnl                    [OTHER-LIBRARIES])
dnl --------------------------------------------------------
dnl Search for a library defining FUNC, if it's not already available.
AC_DEFUN([AC_SEARCH_LIBS_EXT],
[AC_CACHE_CHECK([for library containing $1], [ac_cv_search_ext_$1],
[
ac_func_search_ext_save_LIBS=$LIBS
ac_cv_search_ext_$1=no
AC_LINK_IFELSE([AC_LANG_CALL([], [$1])],
	       [ac_cv_search_ext_$1="none required"])
if test "$ac_cv_search_ext_$1" = no; then
  for ac_lib in $2; do
    LIBS="-l$ac_lib $$3 $6 $ac_func_search_save_ext_LIBS"
    AC_LINK_IFELSE([AC_LANG_CALL([], [$1])],
		   [ac_cv_search_ext_$1="-l$ac_lib"
break])
  done
fi
LIBS=$ac_func_search_ext_save_LIBS])
AS_IF([test "$ac_cv_search_ext_$1" != no],
  [test "$ac_cv_search_ext_$1" = "none required" || $3="$ac_cv_search_ext_$1 $$3"
  $4],
      [$5])dnl
])

dnl check for a function in a $LIBS and $OTHER_LIBS libraries variable.
dnl AC_CHECK_FUNC_EXT(func,OTHER_LIBS,IF-TRUE,IF-FALSE)
AC_DEFUN([AC_CHECK_FUNC_EXT],
[
    AH_CHECK_FUNC_EXT($1)	
    ac_check_func_ext_save_LIBS=$LIBS
    LIBS="$2 $LIBS"
    AS_VAR_PUSHDEF([ac_var], [ac_cv_func_ext_$1])dnl
    AC_CACHE_CHECK([for $1], ac_var,
	[AC_LINK_IFELSE([AC_LANG_FUNC_LINK_TRY([$1])],
                [AS_VAR_SET(ac_var, yes)],
                [AS_VAR_SET(ac_var, no)])])
    LIBS=$ac_check_func_ext_save_LIBS
    AS_IF([test AS_VAR_GET(ac_var) = yes], 
	    [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_$1])) $3], 
	    [$4])dnl
AS_VAR_POPDEF([ac_var])dnl
])# AC_CHECK_FUNC

# AH_CHECK_FUNC_EXT(FUNCNAME)
# ---------------------
m4_define([AH_CHECK_FUNC_EXT],
[AH_TEMPLATE(AS_TR_CPP(HAVE_$1),
             [Define to 1 if you have the `]$1[' function.])])

dnl Define an AC_DEFINE with ifndef guard.
dnl AC_N_DEFINE(VARIABLE [, VALUE])
AC_DEFUN([AC_N_DEFINE],
[
AH_VERBATIM([$1], [
#ifndef $1
# undef $1
#endif
])

 cat >>confdefs.h <<\EOF
#ifndef $1
[#define] $1 m4_if($#, 1, 1, [$2])
#endif
EOF
])

dnl Add an #include
dnl AC_ADD_INCLUDE(VARIABLE)
define(AC_ADD_INCLUDE,
[cat >> confdefs.h <<\EOF
[#include] $1
EOF
])

dnl remove an #include
dnl AC_REMOVE_INCLUDE(VARIABLE)
define(AC_REMOVE_INCLUDE,
[
grep -v '[#include] $1' confdefs.h >confdefs.h.tmp
cat confdefs.h.tmp > confdefs.h
rm confdefs.h.tmp
])

dnl remove an #define
dnl AC_REMOVE_DEFINE(VARIABLE)
define(AC_REMOVE_DEFINE,
[
grep -v '[#define] $1 ' confdefs.h |grep -v '[#define] $1[$]'>confdefs.h.tmp
cat confdefs.h.tmp > confdefs.h
rm confdefs.h.tmp
])

dnl AS_HELP_STRING is not available in autoconf 2.57, and AC_HELP_STRING is deprecated
dnl in autoconf 2.59, so define AS_HELP_STRING to be AC_HELP_STRING unless it is already
dnl defined.
m4_ifdef([AS_HELP_STRING], , [m4_define([AS_HELP_STRING], m4_defn([AC_HELP_STRING]))])

dnl check if the prototype in the header matches the given one
dnl AC_VERIFY_C_PROTOTYPE(prototype,functionbody,[IF-TRUE].[IF-FALSE],[extraheaders])
AC_DEFUN([AC_VERIFY_C_PROTOTYPE],
[AC_CACHE_CHECK([for prototype $1], AS_TR_SH([ac_cv_c_prototype_$1]),
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([
		AC_INCLUDES_DEFAULT
		$5
		$1
		{
			$2
		}
	])],[
		AS_TR_SH([ac_cv_c_prototype_$1])=yes
	],[
		AS_TR_SH([ac_cv_c_prototype_$1])=no
	])
)
AS_IF([test $AS_TR_SH([ac_cv_c_prototype_$1]) = yes],[$3],[$4])
])

AC_DEFUN([LIBREPLACE_PROVIDE_HEADER], 
[AC_CHECK_HEADER([$1], 
		[ AC_CONFIG_COMMANDS(rm-$1, [rm -f $libreplacedir/$1], [libreplacedir=$libreplacedir]) ],
		[ AC_CONFIG_COMMANDS(mk-$1, [echo "#include \"replace.h\"" > $libreplacedir/$1], [libreplacedir=$libreplacedir]) ]
	)
])

dnl AC_HAVE_TYPE(TYPE,INCLUDES)
AC_DEFUN([AC_HAVE_TYPE], [
AC_REQUIRE([AC_HEADER_STDC])
cv=`echo "$1" | sed 'y%./+- %__p__%'`
AC_MSG_CHECKING(for $1)
AC_CACHE_VAL([ac_cv_type_$cv],
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
AC_INCLUDES_DEFAULT
$2]],
[[$1 foo;]])],
[eval "ac_cv_type_$cv=yes"],
[eval "ac_cv_type_$cv=no"]))dnl
ac_foo=`eval echo \\$ac_cv_type_$cv`
AC_MSG_RESULT($ac_foo)
if test "$ac_foo" = yes; then
  ac_tr_hdr=HAVE_`echo $1 | sed 'y%abcdefghijklmnopqrstuvwxyz./- %ABCDEFGHIJKLMNOPQRSTUVWXYZ____%'`
if false; then
	AC_CHECK_TYPES($1)
fi
  AC_DEFINE_UNQUOTED($ac_tr_hdr, 1, [Define if you have type `$1'])
fi
])