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foundation.m4

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Revision 26175, 11.1 KB (checked in by jmpp@…, 19 months ago)
Merging landonf's r26135: Autoconf support for objc, foundation, and optionally-enabled -Werror.

Line
1	#------------------------------------------------------------------------
2	# MP_COMPILER_ATTRIBUTE_LF_PRIVATE
3	#
4	# Determines whether the compiler supports the symbol
5	# 'visibility("hidden")' attribute
6	#
7	# Arguments:
8	# None.
9	#
10	# Requires:
11	# none
12	#
13	# Depends:
14	# none
15	#
16	# Results:
17	#
18	# Defines the following macros:
19	# LF_PRIVATE
20	#
21	#------------------------------------------------------------------------
22
23	AC_DEFUN([MP_COMPILER_ATTRIBUTE_LF_PRIVATE], [
24	AC_MSG_CHECKING([for gcc symbol visibility attribute])
25	AC_CACHE_VAL(mp_cv_attribute_mp_private, [
26	AC_COMPILE_IFELSE([
27	AC_LANG_SOURCE([
28	#if defined(__GNUC__) && defined(__APPLE__) && __GNUC__ < 4
29	# error Darwin does not support the visibility attribute with gcc releases prior to 4
30	#elif defined(WIN32) && __GNUC__ < 4
31	# error MinGW/Cygwin do not support the visibility attribute with gcc releases prior to 4.
32	#endif
33	int a __attribute__ ((visibility("hidden")));
34	])
35	],[
36	mp_cv_attribute_mp_private="__attribute__((visibility(\"hidden\")))"
37	],[
38	mp_cv_attribute_mp_private="no"
39	])
40	])
41
42	AC_MSG_RESULT([$mp_cv_attribute_mp_private])
43
44	if test x"$mp_cv_attribute_mp_private" = "xno"; then
45	MP_PRIVATE=""
46	else
47	MP_PRIVATE="$mp_cv_attribute_mp_private"
48	fi
49
50	AC_DEFINE_UNQUOTED(MP_PRIVATE, $MP_PRIVATE, [Mark private symbols])
51	])
52
53
54	#------------------------------------------------------------------------
55	# MP_OBJC_RUNTIME --
56	#
57	# Determine the default, working Objective C runtime
58	#
59	# Arguments:
60	# None.
61	#
62	# Requires:
63	# none
64	#
65	# Depends:
66	# AC_PROG_OBJC from objc.m4
67	#
68	# Results:
69	#
70	# Adds a --with-objc-runtime switch to configure.
71	# Result is cached.
72	#
73	# Defines one of the following preprocessor macros:
74	# APPLE_RUNTIME GNU_RUNTIME
75	#
76	# Substitutes the following variables:
77	# OBJC_RUNTIME OBJC_RUNTIME_FLAGS OBJC_LIBS
78	# OBJC_PTHREAD_CFLAGS OBJC_PTHREAD_LIBS
79	#------------------------------------------------------------------------
80	AC_DEFUN([MP_OBJC_RUNTIME],[
81	AC_REQUIRE([AC_PROG_OBJC])
82	AC_ARG_WITH(objc-runtime, AC_HELP_STRING([--with-objc-runtime], [Specify either "GNU" or "apple"]), [with_objc_runtime=${withval}])
83
84	if test x"${with_objc_runtime}" != x; then
85	case "${with_objc_runtime}" in
86	GNU)
87	;;
88	apple)
89	;;
90	*)
91	AC_MSG_ERROR([${with_objc_runtime} is not a valid argument to --with-objc-runtime. Please specify either "GNU" or "apple"])
92	;;
93	esac
94	fi
95
96	AC_LANG_PUSH([Objective C])
97
98	# Check for common header, objc/objc.h
99	AC_CHECK_HEADERS([objc/objc.h], ,[AC_MSG_ERROR([Can't locate Objective C runtime headers])])
100
101	# Save LIBS & OBJCFLAGS
102	# depending on whether the cache is used,
103	# the variables may or may not be modified.
104	OLD_LIBS="${LIBS}"
105	OLD_OBJCFLAGS="${OBJCFLAGS}"
106
107	# Add -lobjc. The following tests will ensure that the library exists and functions with the detected Objective C compiler
108	LIBS="${LIBS} -lobjc"
109
110	# Test if pthreads are required to link against
111	# libobjc - this is the case on FreeBSD.
112
113	AC_MSG_CHECKING([if linking libobjc requires pthreads])
114	AC_CACHE_VAL(mp_cv_objc_req_pthread, [
115	# First, test if objc links without pthreads
116	# The following uses quadrigraphs
117	# '@<:@' = '['
118	# '@:>@' = ']'
119	AC_LINK_IFELSE([
120	AC_LANG_PROGRAM([
121	#include <objc/objc.h>
122	#include <objc/Object.h>
123	], [
124	Object *obj = @<:@Object alloc@:>@;
125	puts(@<:@obj name@:>@);
126	])
127	], [
128	# Linked without -pthread
129	mp_cv_objc_req_pthread="no"
130	], [
131	# Failed to link without -pthread
132	mp_cv_objc_req_pthread="yes"
133	]
134	)
135
136	# If the above failed, try with pthreads
137	if test x"${mp_cv_objc_req_pthread}" = x"yes"; then
138	LIBS="${LIBS} ${PTHREAD_LIBS}"
139	OBJCFLAGS="${OBJCFLAGS} ${PTHREAD_CFLAGS}"
140	AC_LINK_IFELSE([
141	AC_LANG_PROGRAM([
142	#include <objc/objc.h>
143	#include <objc/Object.h>
144	], [
145	Object *obj = @<:@Object alloc@:>@;
146	puts(@<:@obj name@:>@);
147	])
148	], [
149	# Linked with -lpthread
150	mp_cv_objc_req_pthread="yes"
151	], [
152	# Failed to link against objc at all
153	# This will be caught in the runtime
154	# checks below
155	mp_cv_objc_req_pthread="no"
156	]
157	)
158	fi
159	])
160	AC_MSG_RESULT(${mp_cv_objc_req_pthread})
161
162	if test x"${mp_cv_objc_req_pthread}" = x"no"; then
163	OBJC_LIBS="-lobjc"
164	OBJC_PTHREAD_LIBS="${PTHREAD_LIBS}"
165	OBJC_PTHREAD_CFLAGS="${PTHREAD_CFLAGS}"
166	elif test x"${mp_cv_objc_req_pthread}" = x"yes"; then
167	OBJC_LIBS="-lobjc ${PTHREAD_LIBS}"
168	OBJCFLAGS="${OBJCFLAGS} ${PTHREAD_CFLAGS}"
169	fi
170
171	if test x"${with_objc_runtime}" = x \|\| test x"${with_objc_runtime}" = x"apple"; then
172	AC_MSG_CHECKING([for Apple Objective-C runtime])
173	AC_CACHE_VAL(mp_cv_objc_runtime_apple, [
174	# The following uses quadrigraphs
175	# '@<:@' = '['
176	# '@:>@' = ']'
177	AC_LINK_IFELSE([
178	AC_LANG_PROGRAM([
179	#include <objc/objc.h>
180	#include <objc/objc-api.h>
181	], [
182	id class = objc_lookUpClass("Object");
183	id obj = @<:@class alloc@:>@;
184	puts(@<:@obj name@:>@);
185	])
186	], [
187	mp_cv_objc_runtime_apple="yes"
188	], [
189	mp_cv_objc_runtime_apple="no"
190	]
191	)
192	])
193	AC_MSG_RESULT(${mp_cv_objc_runtime_apple})
194	else
195	mp_cv_objc_runtime_apple="no"
196	fi
197
198	if test x"${with_objc_runtime}" = x \|\| test x"${with_objc_runtime}" = x"GNU"; then
199	AC_MSG_CHECKING([for GNU Objective C runtime])
200	AC_CACHE_VAL(mp_cv_objc_runtime_gnu, [
201	# The following uses quadrigraphs
202	# '@<:@' = '['
203	# '@:>@' = ']'
204	AC_LINK_IFELSE([
205	AC_LANG_PROGRAM([
206	#include <objc/objc.h>
207	#include <objc/objc-api.h>
208	], [
209	id class = objc_lookup_class("Object");
210	id obj = @<:@class alloc@:>@;
211	puts(@<:@obj name@:>@);
212	])
213	], [
214	mp_cv_objc_runtime_gnu="yes"
215	], [
216	mp_cv_objc_runtime_gnu="no"
217	]
218	)
219	])
220	AC_MSG_RESULT(${mp_cv_objc_runtime_gnu})
221	else
222	mp_cv_objc_runtime_gnu="no"
223	fi
224
225	# Apple runtime is prefered
226	if test x"${mp_cv_objc_runtime_apple}" = x"yes"; then
227	OBJC_RUNTIME="APPLE_RUNTIME"
228	OBJC_RUNTIME_FLAGS="-fnext-runtime"
229	AC_MSG_NOTICE([Using Apple Objective-C runtime])
230	AC_DEFINE([APPLE_RUNTIME], 1, [Define if using the Apple Objective-C runtime and compiler.])
231	elif test x"${mp_cv_objc_runtime_gnu}" = x"yes"; then
232	OBJC_RUNTIME="GNU_RUNTIME"
233	OBJC_RUNTIME_FLAGS="-fgnu-runtime"
234	AC_MSG_NOTICE([Using GNU Objective-C runtime])
235	AC_DEFINE([GNU_RUNTIME], 1, [Define if using the GNU Objective-C runtime and compiler.])
236	else
237	AC_MSG_FAILURE([Could not locate a working Objective-C runtime.])
238	fi
239
240	# Restore LIBS & OBJCFLAGS
241	LIBS="${OLD_LIBS}"
242	OBJCFLAGS="${OLD_OBJCFLAGS}"
243
244	AC_SUBST([OBJC_RUNTIME])
245	AC_SUBST([OBJC_RUNTIME_FLAGS])
246	AC_SUBST([OBJC_LIBS])
247
248	AC_SUBST([OBJC_PTHREAD_LIBS])
249	AC_SUBST([OBJC_PTHREAD_CFLAGS])
250
251	AC_LANG_POP([Objective C])
252	])
253
254	#------------------------------------------------------------------------
255	# MP_OBJC_FOUNDATION --
256	#
257	# Find a functional Foundation implementation.
258	# The NeXT Foundation implementation is prefered,
259	# as it is most likely to be the system provided
260	# Foundation.
261	#
262	# Arguments:
263	# None.
264	#
265	# Requires:
266	# OBJC_RUNTIME
267	#
268	# Depends:
269	# AC_PROG_OBJC from objc.m4
270	#
271	# Results:
272	#
273	# Adds a --with-objc-foundation switch to configure.
274	# Result is cached.
275	#
276	# Defines one of the following preprocessor macros:
277	# APPLE_FOUNDATION GNUSTEP_FOUNDATION
278	#------------------------------------------------------------------------
279	AC_DEFUN([MP_OBJC_FOUNDATION],[
280	AC_REQUIRE([AC_PROG_OBJC])
281	AC_ARG_WITH(objc-foundation, [ --with-objc-foundation Specify either "GNUstep" or "apple"], [with_objc_foundation=${withval}])
282
283	if test x"${with_objc_foundation}" != x; then
284	case "${with_objc_foundation}" in
285	GNUstep)
286	;;
287	GNU)
288	with_objc_foundation="GNUstep"
289	;;
290	apple)
291	;;
292	*)
293	AC_MSG_ERROR([${with_objc_foundation} is not a valid argument to --with-objc-foundation. Please specify either "GNU" or "apple"])
294	;;
295	esac
296	fi
297
298	AC_LANG_PUSH([Objective C])
299
300	if test x"${with_objc_foundation}" == x \|\| test x"${with_objc_foundation}" == x"apple"; then
301	# '@<:@' = '['
302	# '@:>@' = ']'
303	AC_MSG_CHECKING([for Apple Foundation library])
304
305	# Set NeXT LIBS and CFLAGS
306	APPLE_FOUNDATION_CFLAGS="-framework Foundation"
307	APPLE_FOUNDATION_LIBS="-framework Foundation"
308
309	AC_CACHE_VAL(ac_cv_objc_foundation_apple, [
310	# Save old LIBS and CFLAGS
311	LIBS_OLD="${LIBS}"
312	CFLAGS_OLD="${CFLAGS}"
313
314	CFLAGS="${APPLE_FOUNDATION_CFLAGS} ${CFLAGS}"
315	LIBS="${APPLE_FOUNDATION_LIBS} ${LIBS}"
316
317	AC_LINK_IFELSE([
318	AC_LANG_PROGRAM([
319	#include <Foundation/Foundation.h>
320	], [
321	NSString *string = @<:@@<:@NSString alloc@:>@ initWithCString: "Hello World"@:>@;
322	@<:@NSString length@:>@;
323	])
324	],[
325	ac_cv_objc_foundation_apple="yes"
326	],[
327	ac_cv_objc_foundation_apple="no"
328	]
329	)
330	# Restore LIBS and CFLAGS
331	LIBS="${LIBS_OLD}"
332	CFLAGS="${CFLAGS_OLD}"
333	])
334	AC_MSG_RESULT(${ac_cv_objc_foundation_apple})
335	else
336	ac_cv_objc_foundation_apple="no"
337	fi
338
339	if test x"${with_objc_foundation}" == x \|\| test x${with_objc_foundation} == x"GNUstep"; then
340	if test x"${GNUSTEP_SYSTEM_ROOT}" == x; then
341	if test x"${with_objc_foundation}" == x"GNUstep"; then
342	AC_MSG_ERROR([GNUSTEP_SYSTEM_ROOT is not defined in your environment, preventing the use of GNUstep's Foundation library])
343	else
344	AC_MSG_WARN([GNUSTEP_SYSTEM_ROOT is not defined in your environment, preventing the use of GNUstep's Foundation library])
345	fi
346	else
347
348	AC_MSG_CHECKING([for GNUstep Foundation library])
349
350	# Set GNUstep LDFLAGS, CPPFLAGS, and LIBS
351	GNUSTEP_LDFLAGS="-L${GNUSTEP_SYSTEM_ROOT}/Library/Libraries/"
352	GNUSTEP_CPPFLAGS="-I${GNUSTEP_SYSTEM_ROOT}/Library/Headers/"
353	GNUSTEP_LIBS="-lgnustep-base"
354
355	AC_CACHE_VAL(ac_cv_objc_foundation_gnustep, [
356	# Save old LDFLAGS, CPPFLAGS, and LIBS
357	LDFLAGS_OLD="${LDFLAGS}"
358	CPPFLAGS_OLD="${CPPFLAGS}"
359	LIBS_OLD="${LIBS}"
360
361	LDFLAGS="${GNUSTEP_LDFLAGS} ${LDFLAGS}"
362	CPPFLAGS="${GNUSTEP_CPPFLAGS} ${CPPFLAGS}"
363	LIBS="${GNUSTEP_LIBS} ${LIBS}"
364
365	AC_LINK_IFELSE([
366	AC_LANG_PROGRAM([
367	#include <Foundation/Foundation.h>
368	], [
369	NSString *string = @<:@@<:@NSString alloc@:>@ initWithCString: "Hello World"@:>@;
370	@<:@NSString length@:>@;
371	])
372	],[
373	ac_cv_objc_foundation_gnustep="yes"
374	],[
375	ac_cv_objc_foundation_gnustep="no"
376	]
377	)
378	# Restore LDFLAGS, CPPFLAGS, and LIBS
379	LDFLAGS="${LDFLAGS_OLD}"
380	CPPFLAGS="${CPPFLAGS_OLD}"
381	LIBS="${LIBS_OLD}"
382	])
383	AC_MSG_RESULT(${ac_cv_objc_foundation_gnustep})
384	fi
385	else
386	ac_cv_objc_foundation_gnustep="no"
387	fi
388
389	# NeXT Foundation is prefered
390	if test x"${ac_cv_objc_foundation_apple}" == x"yes"; then
391	OBJC_FOUNDATION="Apple"
392	CPPFLAGS="${APPLE_FOUNDATION_CPPFLAGS} ${CPPFLAGS}"
393	LIBS="${APPLE_FOUNDATION_LIBS} ${LIBS}"
394	AC_DEFINE([APPLE_FOUNDATION], 1, [Define if using the Apple Foundation framework])
395	AC_MSG_NOTICE([Using Apple Foundation library])
396	elif test x"${ac_cv_objc_foundation_gnustep}" == x"yes"; then
397	OBJC_FOUNDATION="GNUstep"
398	CPPFLAGS="${GNUSTEP_CPPFLAGS} ${CPPFLAGS}"
399	LIBS="${GNUSTEP_LIBS} ${LIBS}"
400	LDFLAGS="${GNUSTEP_LDFLAGS} ${LDFLAGS}"
401	AC_DEFINE([GNUSTEP_FOUNDATION], 1, [Define if using the GNUstep Foundation library])
402	AC_MSG_NOTICE([Using GNUstep Foundation library])
403	else
404	AC_MSG_ERROR([Could not find a working Foundation implementation])
405	fi
406
407	AC_LANG_POP([Objective C])
408	])

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