aboutsummaryrefslogtreecommitdiff
path: root/gold/configure.ac
blob: 1dcd3ae6202642c7bf1b9c39c4457e0ab3414fda (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
dnl Process this file with autoconf to produce a configure script.

AC_PREREQ(2.59)

AC_INIT(gold, 0.1)
AC_CONFIG_SRCDIR(gold.cc)

AC_CANONICAL_TARGET

AM_INIT_AUTOMAKE

AM_CONFIG_HEADER(config.h:config.in)

AC_ARG_WITH(sysroot,
[  --with-sysroot[=DIR]    search for usr/lib et al within DIR],
[sysroot=$withval], [sysroot=no])

if test "$sysroot" = "yes"; then
  sysroot='${exec_prefix}/${target_alias}/sys-root'
elif test "$sysroot" = "no"; then
  sysroot=
fi

sysroot_relocatable=0
if test -n "$sysroot"; then
  case "sysroot" in
    "${prefix}" | "${prefix}/"* | \
    "${exec_prefix}" | "${exec_prefix}/"* | \
    '${prefix}' | '${prefix}/'*| \
    '${exec_prefix}' | '${exec_prefix}/'*)
      sysroot_relocatable=1
      ;;
  esac
fi

AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT, "$sysroot",
  [System root for target files])
AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT_RELOCATABLE, $sysroot_relocatable,
  [Whether the system root can be relocated])

dnl For now threads are a configure time option.
AC_ARG_ENABLE([threads],
[  --enable-threads        multi-threaded linking],
[case "${enableval}" in
  yes | "") threads=yes ;;
  no) threads=no ;;
  *) threads=yes ;;
 esac],
[threads=no])
if test "$threads" = "yes"; then
  AC_DEFINE(ENABLE_THREADS, 1,
	    [Define to do multi-threaded linking])
fi
AM_CONDITIONAL(THREADS, test "$threads" = "yes")

AC_ARG_ENABLE([targets],
[  --enable-targets        alternative target configurations],
[case "${enableval}" in
  yes | "")
    AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])
    ;;
  no)
    enable_targets=
    ;;
  *)
    enable_targets=$enableval
    ;;
esac],
[# For now, enable all targets by default
 enable_targets=all
])

# Canonicalize the enabled targets.
if test -n "$enable_targets"; then
  for targ in `echo $enable_targets | sed -e 's/,/ /g'`; do
    result=`$ac_config_sub $targ 2>/dev/null`
    if test -n "$result"; then
      canon_targets="$canon_targets $result"
    else
      # Permit unrecognized target names, like "all".
      canon_targets="$canon_targets $targ"
    fi
  done
fi

# See which specific instantiations we need.
targetobjs=
all_targets=
default_machine=
default_size=
default_big_endian=
targ_32_little=
targ_32_big=
targ_64_little=
targ_64_big=
for targ in $target $canon_targets; do
  if test "$targ" = "all"; then
    targ_32_little=yes
    targ_32_big=yes
    targ_64_little=yes
    targ_64_big=yes
    all_targets=yes
  else
    . ${srcdir}/configure.tgt

    if test "$targ_obj" = "UNKNOWN"; then
      AC_MSG_ERROR("unsupported target $targ")
    else
      targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
      if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
	  if test "$targ_big_endian" = "true" \
	      -o "$targ_extra_big_endian" = "true"; then
	      targ_32_big=yes
	  fi
	  if test "$targ_big_endian" = "false" \
	      -o "$targ_extra_big_endian" = "false"; then
	      targ_32_little=yes
	  fi
      fi
      if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
	  if test "$targ_big_endian" = "true" \
	      -o "$targ_extra_big_endian" = "true"; then
	      targ_64_big=yes
	  fi
	  if test "$targ_big_endian" = "false" \
	      -o "$targ_extra_big_endian" = "false"; then
	      targ_64_little=yes
	  fi
      fi

      if test "$target" = "$targ"; then
        default_machine=$targ_machine
	default_size=$targ_size
	default_big_endian=$targ_big_endian
      fi
    fi
  fi
done

if test -n "$targ_32_little"; then
  AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
	      [Define to support 32-bit little-endian targets])
fi
if test -n "$targ_32_big"; then
  AC_DEFINE(HAVE_TARGET_32_BIG, 1,
	      [Define to support 32-bit big-endian targets])
fi
if test -n "$targ_64_little"; then
  AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
	      [Define to support 64-bit little-endian targets])
fi
if test -n "$targ_64_big"; then
  AC_DEFINE(HAVE_TARGET_64_BIG, 1,
	      [Define to support 64-bit big-endian targets])
fi

if test -n "$all_targets"; then
  TARGETOBJS='$(ALL_TARGETOBJS)'
else
  TARGETOBJS="$targetobjs"
fi
AC_SUBST(TARGETOBJS)

AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
		   [Default machine code])
AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
		   [Default size (32 or 64)])
AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
		   [Default big endian (true or false)])

AC_PROG_CC
AC_PROG_CXX
AC_PROG_YACC
AC_PROG_RANLIB
AC_PROG_INSTALL
AC_PROG_LN_S

AC_GNU_SOURCE

ZW_GNU_GETTEXT_SISTER_DIR
AM_PO_SUBDIRS

AC_C_BIGENDIAN

AC_EXEEXT

AM_CONDITIONAL(NATIVE_LINKER,
  test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
AM_CONDITIONAL(GCC, test "$GCC" = yes)

dnl Some architectures do not support taking pointers of functions
dnl defined in shared libraries except in -fPIC mode.  We need to
dnl tell the unittest framework if we're compiling for one of those
dnl targets, so it doesn't try to run the tests that do that.
AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
  case $target_cpu in
    i?86) true;;
    x86_64) false;;
    sparc64) false;;
    *) true;;
  esac])

dnl Test for __thread support.
AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
[AC_COMPILE_IFELSE([__thread int i = 1;],
[gold_cv_c_thread=yes], [gold_cv_c_thread=no])])

AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")

dnl On GNU/Linux TLS in static programs only works when using glibc
dnl 2.4 or later.
AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
[AC_COMPILE_IFELSE([
#include <features.h>
#if !defined __GLIBC__
error
#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
error
#endif
], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])

AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")

dnl Test for #pragma omp threadprivate
AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
[save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fopenmp"
AC_COMPILE_IFELSE([
#include <omp.h>
int i;
#pragma omp threadprivate (i)
], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
CFLAGS="$save_CFLAGS"])
if test "$gold_cv_c_threadprivate" = "yes"; then
  AC_DEFINE(HAVE_OMP_SUPPORT, 1,
	    [Define if compiler supports #pragma omp threadprivate])
fi
AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")

dnl Test for the -ftls-dialect=gnu2 option.
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -mtls-dialect=gnu2"
AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
CFLAGS="$save_CFLAGS"
AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")

dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
dnl only with glibc 2.5 or later.
AC_CACHE_CHECK([for glibc >= 2.5], [gold_cv_lib_glibc25],
[AC_COMPILE_IFELSE([
#include <features.h>
#if !defined __GLIBC__
error
#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 5)
error
#endif
], [gold_cv_lib_glibc25=yes], [gold_cv_lib_glibc25=no])])

AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc25" = "yes")

dnl Check whether the compiler supports constructor priorities in
dnl attributes, which were added in gcc 4.3.
AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
[AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
[gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])

AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")

AM_BINUTILS_WARNINGS

WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//'`
AC_SUBST(WARN_CXXFLAGS)

dnl Force support for large files by default.  This may need to be
dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
AC_SUBST(LFS_CFLAGS)

AC_REPLACE_FUNCS(pread)

# Link in zlib if we can.  This allows us to write compressed sections.
AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")

AC_LANG_PUSH(C++)

AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
AC_CHECK_FUNCS(mallinfo)

# gcc 4.3.0 doesn't recognize the printf attribute on a template
# function.  Check for that.  This is gcc bug 35546.  This test can
# probably be removed after the bug has been fixed for a while.
AC_CACHE_CHECK([whether we can use attributes with template functions],
[gold_cv_template_attribute],
[AC_COMPILE_IFELSE([
template<typename T> extern void foo(const char*, ...)
  __attribute__ ((__format__ (__printf__, 1, 2)));
template<typename T> void foo(const char* format, ...) {}
void bar() { foo<int>("%s\n", "foo"); }
], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
if test "$gold_cv_template_attribute" = "yes"; then
  AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
	    [Define if attributes work on C++ templates])
fi

AC_LANG_POP(C++)

AM_MAINTAINER_MODE

AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)