|
111
|
1 dnl ----------------------------------------------------------------------
|
|
|
2 dnl This whole bit snagged from libgfortran.
|
|
|
3
|
|
|
4 dnl Check whether the target supports __sync_*_compare_and_swap.
|
|
|
5 AC_DEFUN([LIBITM_CHECK_SYNC_BUILTINS], [
|
|
|
6 AC_CACHE_CHECK([whether the target supports __sync_*_compare_and_swap],
|
|
|
7 libitm_cv_have_sync_builtins, [
|
|
|
8 AC_TRY_LINK([], [int foo, bar; bar = __sync_val_compare_and_swap(&foo, 0, 1);],
|
|
|
9 libitm_cv_have_sync_builtins=yes, libitm_cv_have_sync_builtins=no)])
|
|
|
10 if test $libitm_cv_have_sync_builtins = yes; then
|
|
|
11 AC_DEFINE(HAVE_SYNC_BUILTINS, 1,
|
|
|
12 [Define to 1 if the target supports __sync_*_compare_and_swap])
|
|
|
13 fi])
|
|
|
14
|
|
|
15 dnl Check whether the target supports 64-bit __sync_*_compare_and_swap.
|
|
|
16 AC_DEFUN([LIBITM_CHECK_64BIT_SYNC_BUILTINS], [
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|
|
17 AC_CACHE_CHECK([whether the target supports 64-bit __sync_*_compare_and_swap],
|
|
|
18 libitm_cv_have_64bit_sync_builtins, [
|
|
|
19 AC_TRY_LINK([#include <stdint.h>],
|
|
|
20 [uint64_t foo, bar;
|
|
|
21 bar = __sync_val_compare_and_swap(&foo, 0, 1);],
|
|
|
22 libitm_cv_have_64bit_sync_builtins=yes,
|
|
|
23 libitm_cv_have_64bit_sync_builtins=no)])
|
|
|
24 if test $libitm_cv_have_64bit_sync_builtins = yes; then
|
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|
25 AC_DEFINE(HAVE_64BIT_SYNC_BUILTINS, 1,
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|
|
26 [Define to 1 if the target supports 64-bit __sync_*_compare_and_swap])
|
|
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27 fi])
|
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28
|
|
|
29 dnl Check whether the target supports hidden visibility.
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|
|
30 AC_DEFUN([LIBITM_CHECK_ATTRIBUTE_VISIBILITY], [
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|
31 AC_CACHE_CHECK([whether the target supports hidden visibility],
|
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|
32 libitm_cv_have_attribute_visibility, [
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|
33 save_CFLAGS="$CFLAGS"
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|
34 CFLAGS="$CFLAGS -Werror"
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|
|
35 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
|
|
|
36 [], libitm_cv_have_attribute_visibility=yes,
|
|
|
37 libitm_cv_have_attribute_visibility=no)
|
|
|
38 CFLAGS="$save_CFLAGS"])
|
|
|
39 if test $libitm_cv_have_attribute_visibility = yes; then
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40 AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,
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|
41 [Define to 1 if the target supports __attribute__((visibility(...))).])
|
|
|
42 fi])
|
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43
|
|
|
44 dnl Check whether the target supports dllexport
|
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45 AC_DEFUN([LIBITM_CHECK_ATTRIBUTE_DLLEXPORT], [
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46 AC_CACHE_CHECK([whether the target supports dllexport],
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47 libitm_cv_have_attribute_dllexport, [
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|
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48 save_CFLAGS="$CFLAGS"
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|
49 CFLAGS="$CFLAGS -Werror"
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|
|
50 AC_TRY_COMPILE([void __attribute__((dllexport)) foo(void) { }],
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|
|
51 [], libitm_cv_have_attribute_dllexport=yes,
|
|
|
52 libitm_cv_have_attribute_dllexport=no)
|
|
|
53 CFLAGS="$save_CFLAGS"])
|
|
|
54 if test $libitm_cv_have_attribute_dllexport = yes; then
|
|
|
55 AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1,
|
|
|
56 [Define to 1 if the target supports __attribute__((dllexport)).])
|
|
|
57 fi])
|
|
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58
|
|
|
59 dnl Check whether the target supports symbol aliases.
|
|
|
60 AC_DEFUN([LIBITM_CHECK_ATTRIBUTE_ALIAS], [
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|
|
61 AC_CACHE_CHECK([whether the target supports symbol aliases],
|
|
|
62 libitm_cv_have_attribute_alias, [
|
|
|
63 AC_TRY_LINK([
|
|
|
64 void foo(void) { }
|
|
|
65 extern void bar(void) __attribute__((alias("foo")));],
|
|
|
66 [bar();], libitm_cv_have_attribute_alias=yes, libitm_cv_have_attribute_alias=no)])
|
|
|
67 if test $libitm_cv_have_attribute_alias = yes; then
|
|
|
68 AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1,
|
|
|
69 [Define to 1 if the target supports __attribute__((alias(...))).])
|
|
|
70 fi])
|
|
|
71
|
|
|
72 dnl Check how size_t is mangled.
|
|
|
73 AC_DEFUN([LIBITM_CHECK_SIZE_T_MANGLING], [
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|
|
74 AC_CACHE_CHECK([how size_t is mangled],
|
|
|
75 libitm_cv_size_t_mangling, [
|
|
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76 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
|
|
|
77 [libitm_cv_size_t_mangling=m], [
|
|
|
78 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
|
|
|
79 [libitm_cv_size_t_mangling=j], [
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|
|
80 AC_TRY_COMPILE([],
|
|
|
81 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
|
|
|
82 [libitm_cv_size_t_mangling=y], [
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|
|
83 AC_TRY_COMPILE([],
|
|
|
84 [extern __SIZE_TYPE__ x; extern unsigned short x;],
|
|
|
85 [libitm_cv_size_t_mangling=t],
|
|
|
86 [libitm_cv_size_t_mangling=x])
|
|
|
87 ])
|
|
|
88 ])
|
|
|
89 ])
|
|
|
90 ])
|
|
|
91 if test $libitm_cv_size_t_mangling = x; then
|
|
|
92 AC_MSG_ERROR([Unknown underlying type for size_t])
|
|
|
93 fi
|
|
|
94 AC_DEFINE_UNQUOTED(MANGLE_SIZE_T, [$libitm_cv_size_t_mangling],
|
|
|
95 [Define to the letter to which size_t is mangled.])
|
|
|
96 ])
|
|
|
97
|
|
|
98 dnl Check if as supports AVX instructions.
|
|
|
99 AC_DEFUN([LIBITM_CHECK_AS_AVX], [
|
|
|
100 case "${target_cpu}" in
|
|
|
101 i[[34567]]86 | x86_64)
|
|
|
102 AC_CACHE_CHECK([if the assembler supports AVX], libitm_cv_as_avx, [
|
|
|
103 AC_TRY_COMPILE([], [asm("vzeroupper");],
|
|
|
104 [libitm_cv_as_avx=yes], [libitm_cv_as_avx=no])
|
|
|
105 ])
|
|
|
106 if test x$libitm_cv_as_avx = xyes; then
|
|
|
107 AC_DEFINE(HAVE_AS_AVX, 1, [Define to 1 if the assembler supports AVX.])
|
|
|
108 fi
|
|
|
109 ;;
|
|
|
110 esac])
|
|
|
111
|
|
|
112 dnl Check if as supports RTM instructions.
|
|
|
113 AC_DEFUN([LIBITM_CHECK_AS_RTM], [
|
|
|
114 case "${target_cpu}" in
|
|
|
115 i[[34567]]86 | x86_64)
|
|
|
116 AC_CACHE_CHECK([if the assembler supports RTM], libitm_cv_as_rtm, [
|
|
|
117 AC_TRY_COMPILE([], [asm("1: xbegin 1b; xend");],
|
|
|
118 [libitm_cv_as_rtm=yes], [libitm_cv_as_rtm=no])
|
|
|
119 ])
|
|
|
120 if test x$libitm_cv_as_rtm = xyes; then
|
|
|
121 AC_DEFINE(HAVE_AS_RTM, 1, [Define to 1 if the assembler supports RTM.])
|
|
|
122 fi
|
|
|
123 ;;
|
|
|
124 esac])
|
|
|
125
|
|
|
126 dnl Check if as supports HTM instructions.
|
|
|
127 AC_DEFUN([LIBITM_CHECK_AS_HTM], [
|
|
|
128 case "${target_cpu}" in
|
|
|
129 powerpc*)
|
|
|
130 AC_CACHE_CHECK([if the assembler supports HTM], libitm_cv_as_htm, [
|
|
|
131 AC_TRY_COMPILE([], [asm("tbegin. 0; tend. 0");],
|
|
|
132 [libitm_cv_as_htm=yes], [libitm_cv_as_htm=no])
|
|
|
133 ])
|
|
|
134 if test x$libitm_cv_as_htm = xyes; then
|
|
|
135 AC_DEFINE(HAVE_AS_HTM, 1, [Define to 1 if the assembler supports HTM.])
|
|
|
136 fi
|
|
|
137 ;;
|
|
|
138 s390*)
|
|
|
139 AC_CACHE_CHECK([if the assembler supports HTM], libitm_cv_as_htm, [
|
|
|
140 save_CFLAGS="$CFLAGS"
|
|
|
141 CFLAGS="$CFLAGS -march=zEC12"
|
|
|
142 AC_TRY_COMPILE([], [asm("tbegin 0,0; tend");],
|
|
|
143 [libitm_cv_as_htm=yes], [libitm_cv_as_htm=no])
|
|
|
144 CFLAGS="$save_CFLAGS"])
|
|
|
145 if test x$libitm_cv_as_htm = xyes; then
|
|
|
146 AC_DEFINE(HAVE_AS_HTM, 1, [Define to 1 if the assembler supports HTM.])
|
|
|
147 fi
|
|
|
148 ;;
|
|
|
149 esac])
|
|
|
150
|
|
|
151 sinclude(../libtool.m4)
|
|
131
|
152 sinclude(../config/cet.m4)
|
|
111
|
153 dnl The lines below arrange for aclocal not to bring an installed
|
|
|
154 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
|
|
|
155 dnl add a definition of LIBTOOL to Makefile.in.
|
|
|
156 ifelse(,,,[AC_SUBST(LIBTOOL)
|
|
|
157 AC_DEFUN([AM_PROG_LIBTOOL])
|
|
|
158 AC_DEFUN([AC_LIBTOOL_DLOPEN])
|
|
|
159 AC_DEFUN([AC_PROG_LD])
|
|
|
160 ])
|
|
|
161
|
|
|
162 dnl ----------------------------------------------------------------------
|
|
|
163 dnl This whole bit snagged from libstdc++-v3.
|
|
|
164
|
|
|
165 dnl
|
|
|
166 dnl LIBITM_ENABLE
|
|
|
167 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
|
|
|
168 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
|
|
|
169 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
|
|
|
170 dnl
|
|
|
171 dnl See docs/html/17_intro/configury.html#enable for documentation.
|
|
|
172 dnl
|
|
|
173 m4_define([LIBITM_ENABLE],[dnl
|
|
|
174 m4_define([_g_switch],[--enable-$1])dnl
|
|
|
175 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
|
|
|
176 AC_ARG_ENABLE($1,_g_help,
|
|
|
177 m4_bmatch([$5],
|
|
|
178 [^permit ],
|
|
|
179 [[
|
|
|
180 case "$enableval" in
|
|
|
181 m4_bpatsubst([$5],[permit ])) ;;
|
|
|
182 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
|
|
|
183 dnl Idea for future: generate a URL pointing to
|
|
|
184 dnl "onlinedocs/configopts.html#whatever"
|
|
|
185 esac
|
|
|
186 ]],
|
|
|
187 [^$],
|
|
|
188 [[
|
|
|
189 case "$enableval" in
|
|
|
190 yes|no) ;;
|
|
|
191 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
|
|
|
192 esac
|
|
|
193 ]],
|
|
|
194 [[$5]]),
|
|
|
195 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
|
|
|
196 m4_undefine([_g_switch])dnl
|
|
|
197 m4_undefine([_g_help])dnl
|
|
|
198 ])
|
|
|
199
|
|
|
200
|
|
|
201 dnl
|
|
|
202 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
|
|
|
203 dnl the native linker is in use, all variables will be defined to something
|
|
|
204 dnl safe (like an empty string).
|
|
|
205 dnl
|
|
|
206 dnl Defines:
|
|
|
207 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
|
|
|
208 dnl OPT_LDFLAGS='-Wl,-O1' if possible
|
|
|
209 dnl LD (as a side effect of testing)
|
|
|
210 dnl Sets:
|
|
|
211 dnl with_gnu_ld
|
|
|
212 dnl libitm_ld_is_gold (possibly)
|
|
|
213 dnl libitm_gnu_ld_version (possibly)
|
|
|
214 dnl
|
|
|
215 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
|
|
|
216 dnl set libitm_gnu_ld_version to 12345. Zeros cause problems.
|
|
|
217 dnl
|
|
|
218 AC_DEFUN([LIBITM_CHECK_LINKER_FEATURES], [
|
|
|
219 # If we're not using GNU ld, then there's no point in even trying these
|
|
|
220 # tests. Check for that first. We should have already tested for gld
|
|
|
221 # by now (in libtool), but require it now just to be safe...
|
|
|
222 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
|
|
|
223 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
|
|
|
224 AC_REQUIRE([AC_PROG_LD])
|
|
|
225 AC_REQUIRE([AC_PROG_AWK])
|
|
|
226
|
|
|
227 # The name set by libtool depends on the version of libtool. Shame on us
|
|
|
228 # for depending on an impl detail, but c'est la vie. Older versions used
|
|
|
229 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
|
|
|
230 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
|
|
|
231 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
|
|
|
232 # set (hence we're using an older libtool), then set it.
|
|
|
233 if test x${with_gnu_ld+set} != xset; then
|
|
|
234 if test x${ac_cv_prog_gnu_ld+set} != xset; then
|
|
|
235 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
|
|
|
236 with_gnu_ld=no
|
|
|
237 else
|
|
|
238 with_gnu_ld=$ac_cv_prog_gnu_ld
|
|
|
239 fi
|
|
|
240 fi
|
|
|
241
|
|
|
242 # Start by getting the version number. I think the libtool test already
|
|
|
243 # does some of this, but throws away the result.
|
|
|
244 libitm_ld_is_gold=no
|
|
|
245 if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then
|
|
|
246 libitm_ld_is_gold=yes
|
|
|
247 fi
|
|
|
248 changequote(,)
|
|
|
249 ldver=`$LD --version 2>/dev/null |
|
|
145
|
250 sed -e 's/[. ][0-9]\{8\}$//;s/.* \([^ ]\{1,\}\)$/\1/; q'`
|
|
111
|
251 changequote([,])
|
|
|
252 libitm_gnu_ld_version=`echo $ldver | \
|
|
|
253 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
|
|
|
254
|
|
|
255 # Set --gc-sections.
|
|
|
256 if test "$with_gnu_ld" = "notbroken"; then
|
|
|
257 # GNU ld it is! Joy and bunny rabbits!
|
|
|
258
|
|
|
259 # All these tests are for C++; save the language and the compiler flags.
|
|
|
260 # Need to do this so that g++ won't try to link in libstdc++
|
|
|
261 ac_test_CFLAGS="${CFLAGS+set}"
|
|
|
262 ac_save_CFLAGS="$CFLAGS"
|
|
|
263 CFLAGS='-x c++ -Wl,--gc-sections'
|
|
|
264
|
|
|
265 # Check for -Wl,--gc-sections
|
|
|
266 # XXX This test is broken at the moment, as symbols required for linking
|
|
|
267 # are now in libsupc++ (not built yet). In addition, this test has
|
|
|
268 # cored on solaris in the past. In addition, --gc-sections doesn't
|
|
|
269 # really work at the moment (keeps on discarding used sections, first
|
|
|
270 # .eh_frame and now some of the glibc sections for iconv).
|
|
|
271 # Bzzzzt. Thanks for playing, maybe next time.
|
|
|
272 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
|
|
|
273 AC_TRY_RUN([
|
|
|
274 int main(void)
|
|
|
275 {
|
|
|
276 try { throw 1; }
|
|
|
277 catch (...) { };
|
|
|
278 return 0;
|
|
|
279 }
|
|
|
280 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
|
|
|
281 if test "$ac_test_CFLAGS" = set; then
|
|
|
282 CFLAGS="$ac_save_CFLAGS"
|
|
|
283 else
|
|
|
284 # this is the suspicious part
|
|
|
285 CFLAGS=''
|
|
|
286 fi
|
|
|
287 if test "$ac_sectionLDflags" = "yes"; then
|
|
|
288 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
|
|
|
289 fi
|
|
|
290 AC_MSG_RESULT($ac_sectionLDflags)
|
|
|
291 fi
|
|
|
292
|
|
|
293 # Set linker optimization flags.
|
|
|
294 if test x"$with_gnu_ld" = x"yes"; then
|
|
|
295 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
|
|
|
296 fi
|
|
|
297
|
|
|
298 AC_SUBST(SECTION_LDFLAGS)
|
|
|
299 AC_SUBST(OPT_LDFLAGS)
|
|
|
300 ])
|
|
|
301
|
|
|
302
|
|
|
303 dnl
|
|
|
304 dnl Add version tags to symbols in shared library (or not), additionally
|
|
|
305 dnl marking other symbols as private/local (or not).
|
|
|
306 dnl
|
|
|
307 dnl --enable-symvers=style adds a version script to the linker call when
|
|
|
308 dnl creating the shared library. The choice of version script is
|
|
|
309 dnl controlled by 'style'.
|
|
|
310 dnl --disable-symvers does not.
|
|
|
311 dnl + Usage: LIBITM_ENABLE_SYMVERS[(DEFAULT)]
|
|
|
312 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
|
|
|
313 dnl choose a default style based on linker characteristics. Passing
|
|
|
314 dnl 'no' disables versioning.
|
|
|
315 dnl
|
|
|
316 AC_DEFUN([LIBITM_ENABLE_SYMVERS], [
|
|
|
317
|
|
|
318 LIBITM_ENABLE(symvers,yes,[=STYLE],
|
|
|
319 [enables symbol versioning of the shared library],
|
|
|
320 [permit yes|no|gnu*|sun])
|
|
|
321
|
|
|
322 # If we never went through the LIBITM_CHECK_LINKER_FEATURES macro, then we
|
|
|
323 # don't know enough about $LD to do tricks...
|
|
|
324 AC_REQUIRE([LIBITM_CHECK_LINKER_FEATURES])
|
|
|
325
|
|
|
326 # Turn a 'yes' into a suitable default.
|
|
|
327 if test x$enable_symvers = xyes ; then
|
|
|
328 # FIXME The following test is too strict, in theory.
|
|
|
329 if test $enable_shared = no || test "x$LD" = x; then
|
|
|
330 enable_symvers=no
|
|
|
331 else
|
|
|
332 if test $with_gnu_ld = yes ; then
|
|
|
333 enable_symvers=gnu
|
|
|
334 else
|
|
|
335 case ${target_os} in
|
|
|
336 # Sun symbol versioning exists since Solaris 2.5.
|
|
|
337 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
|
|
|
338 enable_symvers=sun ;;
|
|
|
339 *)
|
|
|
340 enable_symvers=no ;;
|
|
|
341 esac
|
|
|
342 fi
|
|
|
343 fi
|
|
|
344 fi
|
|
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345
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346 # Check if 'sun' was requested on non-Solaris 2 platforms.
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347 if test x$enable_symvers = xsun ; then
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348 case ${target_os} in
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349 solaris2*)
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350 # All fine.
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351 ;;
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352 *)
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353 # Unlikely to work.
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354 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
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355 AC_MSG_WARN([=== you are not targetting Solaris 2.])
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356 AC_MSG_WARN([=== Symbol versioning will be disabled.])
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357 enable_symvers=no
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358 ;;
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359 esac
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360 fi
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361
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362 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
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363 if test $enable_symvers != no; then
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364 AC_MSG_CHECKING([for shared libgcc])
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365 ac_save_CFLAGS="$CFLAGS"
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366 CFLAGS=' -lgcc_s'
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367 AC_TRY_LINK(, [return 0;], libitm_shared_libgcc=yes, libitm_shared_libgcc=no)
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368 CFLAGS="$ac_save_CFLAGS"
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369 if test $libitm_shared_libgcc = no; then
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370 cat > conftest.c <<EOF
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371 int main (void) { return 0; }
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372 EOF
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373 changequote(,)dnl
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374 libitm_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
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375 -shared -shared-libgcc -o conftest.so \
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376 conftest.c -v 2>&1 >/dev/null \
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377 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
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378 changequote([,])dnl
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379 rm -f conftest.c conftest.so
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380 if test x${libitm_libgcc_s_suffix+set} = xset; then
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381 CFLAGS=" -lgcc_s$libitm_libgcc_s_suffix"
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382 AC_TRY_LINK(, [return 0;], libitm_shared_libgcc=yes)
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383 CFLAGS="$ac_save_CFLAGS"
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384 fi
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385 fi
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386 AC_MSG_RESULT($libitm_shared_libgcc)
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387 fi
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388
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389 # For GNU ld, we need at least this version. The format is described in
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390 # LIBITM_CHECK_LINKER_FEATURES above.
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391 libitm_min_gnu_ld_version=21400
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392 # XXXXXXXXXXX libitm_gnu_ld_version=21390
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393
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394 # Check to see if unspecified "yes" value can win, given results above.
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395 # Change "yes" into either "no" or a style name.
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396 if test $enable_symvers != no && test $libitm_shared_libgcc = yes; then
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397 if test $with_gnu_ld = yes; then
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398 if test $libitm_gnu_ld_version -ge $libitm_min_gnu_ld_version ; then
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399 enable_symvers=gnu
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400 elif test $libitm_ld_is_gold = yes ; then
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401 enable_symvers=gnu
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402 else
|
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403 # The right tools, the right setup, but too old. Fallbacks?
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|
|
404 AC_MSG_WARN(=== Linker version $libitm_gnu_ld_version is too old for)
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|
405 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
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|
|
406 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
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|
|
407 AC_MSG_WARN(=== $libitm_min_gnu_ld_version or later and rebuild GCC.)
|
|
|
408 if test $libitm_gnu_ld_version -ge 21200 ; then
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|
|
409 # Globbing fix is present, proper block support is not.
|
|
|
410 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
|
|
|
411 dnl enable_symvers=???
|
|
|
412 AC_MSG_WARN([=== Symbol versioning will be disabled.])
|
|
|
413 enable_symvers=no
|
|
|
414 else
|
|
|
415 # 2.11 or older.
|
|
|
416 AC_MSG_WARN([=== Symbol versioning will be disabled.])
|
|
|
417 enable_symvers=no
|
|
|
418 fi
|
|
|
419 fi
|
|
|
420 elif test $enable_symvers = sun; then
|
|
|
421 : All interesting versions of Sun ld support sun style symbol versioning.
|
|
|
422 else
|
|
|
423 # just fail for now
|
|
|
424 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
|
|
|
425 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
|
|
|
426 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
|
|
|
427 AC_MSG_WARN([=== Symbol versioning will be disabled.])
|
|
|
428 enable_symvers=no
|
|
|
429 fi
|
|
|
430 fi
|
|
|
431
|
|
|
432 AM_CONDITIONAL(LIBITM_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
|
|
|
433 AM_CONDITIONAL(LIBITM_BUILD_VERSIONED_SHLIB_GNU, test $enable_symvers = gnu)
|
|
|
434 AM_CONDITIONAL(LIBITM_BUILD_VERSIONED_SHLIB_SUN, test $enable_symvers = sun)
|
|
|
435 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
|
|
|
436 ])
|
