1dnl Process this file with autoconf to produce a configure script.
2
3AC_PREREQ(2.59)
4
5AC_INIT(gold, 0.1)
6AC_CONFIG_SRCDIR(gold.cc)
7
8AC_CANONICAL_TARGET
9
10AM_INIT_AUTOMAKE
11
12AM_CONFIG_HEADER(config.h:config.in)
13
14AC_ARG_WITH(sysroot,
15[  --with-sysroot[=DIR]    search for usr/lib et al within DIR],
16[sysroot=$withval], [sysroot=no])
17
18if test "$sysroot" = "yes"; then
19  sysroot='${exec_prefix}/${target_alias}/sys-root'
20elif test "$sysroot" = "no"; then
21  sysroot=
22fi
23
24sysroot_relocatable=0
25if test -n "$sysroot"; then
26  case "sysroot" in
27    "${prefix}" | "${prefix}/"* | \
28    "${exec_prefix}" | "${exec_prefix}/"* | \
29    '${prefix}' | '${prefix}/'*| \
30    '${exec_prefix}' | '${exec_prefix}/'*)
31      sysroot_relocatable=1
32      ;;
33  esac
34fi
35
36AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT, "$sysroot",
37  [System root for target files])
38AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT_RELOCATABLE, $sysroot_relocatable,
39  [Whether the system root can be relocated])
40
41dnl For now threads are a configure time option.
42AC_ARG_ENABLE([threads],
43[  --enable-threads        multi-threaded linking],
44[case "${enableval}" in
45  yes | "") threads=yes ;;
46  no) threads=no ;;
47  *) threads=yes ;;
48 esac],
49[threads=no])
50if test "$threads" = "yes"; then
51  AC_DEFINE(ENABLE_THREADS, 1,
52	    [Define to do multi-threaded linking])
53fi
54AM_CONDITIONAL(THREADS, test "$threads" = "yes")
55
56AC_ARG_ENABLE([targets],
57[  --enable-targets        alternative target configurations],
58[case "${enableval}" in
59  yes | "")
60    AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])
61    ;;
62  no)
63    enable_targets=
64    ;;
65  *)
66    enable_targets=$enableval
67    ;;
68esac],
69[# For now, enable all targets by default
70 enable_targets=all
71])
72
73# Canonicalize the enabled targets.
74if test -n "$enable_targets"; then
75  for targ in `echo $enable_targets | sed -e 's/,/ /g'`; do
76    result=`$ac_config_sub $targ 2>/dev/null`
77    if test -n "$result"; then
78      canon_targets="$canon_targets $result"
79    else
80      # Permit unrecognized target names, like "all".
81      canon_targets="$canon_targets $targ"
82    fi
83  done
84fi
85
86# See which specific instantiations we need.
87targetobjs=
88all_targets=
89default_machine=
90default_size=
91default_big_endian=
92targ_32_little=
93targ_32_big=
94targ_64_little=
95targ_64_big=
96for targ in $target $canon_targets; do
97  if test "$targ" = "all"; then
98    targ_32_little=yes
99    targ_32_big=yes
100    targ_64_little=yes
101    targ_64_big=yes
102    all_targets=yes
103  else
104    . ${srcdir}/configure.tgt
105
106    if test "$targ_obj" = "UNKNOWN"; then
107      AC_MSG_ERROR("unsupported target $targ")
108    else
109      targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
110      if test "$targ_extra_obj" != ""; then
111        targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
112      fi
113      if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
114	  if test "$targ_big_endian" = "true" \
115	      -o "$targ_extra_big_endian" = "true"; then
116	      targ_32_big=yes
117	  fi
118	  if test "$targ_big_endian" = "false" \
119	      -o "$targ_extra_big_endian" = "false"; then
120	      targ_32_little=yes
121	  fi
122      fi
123      if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
124	  if test "$targ_big_endian" = "true" \
125	      -o "$targ_extra_big_endian" = "true"; then
126	      targ_64_big=yes
127	  fi
128	  if test "$targ_big_endian" = "false" \
129	      -o "$targ_extra_big_endian" = "false"; then
130	      targ_64_little=yes
131	  fi
132      fi
133
134      if test "$target" = "$targ"; then
135        default_machine=$targ_machine
136	default_size=$targ_size
137	default_big_endian=$targ_big_endian
138      fi
139    fi
140  fi
141done
142
143if test -n "$targ_32_little"; then
144  AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
145	      [Define to support 32-bit little-endian targets])
146fi
147if test -n "$targ_32_big"; then
148  AC_DEFINE(HAVE_TARGET_32_BIG, 1,
149	      [Define to support 32-bit big-endian targets])
150fi
151if test -n "$targ_64_little"; then
152  AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
153	      [Define to support 64-bit little-endian targets])
154fi
155if test -n "$targ_64_big"; then
156  AC_DEFINE(HAVE_TARGET_64_BIG, 1,
157	      [Define to support 64-bit big-endian targets])
158fi
159
160if test -n "$all_targets"; then
161  TARGETOBJS='$(ALL_TARGETOBJS)'
162else
163  TARGETOBJS="$targetobjs"
164fi
165AC_SUBST(TARGETOBJS)
166
167AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
168		   [Default machine code])
169AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
170		   [Default size (32 or 64)])
171AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
172		   [Default big endian (true or false)])
173
174AC_PROG_CC
175AC_PROG_CXX
176AC_PROG_YACC
177AC_PROG_RANLIB
178AC_PROG_INSTALL
179AC_PROG_LN_S
180
181AC_GNU_SOURCE
182
183ZW_GNU_GETTEXT_SISTER_DIR
184AM_PO_SUBDIRS
185
186AC_C_BIGENDIAN
187
188AC_EXEEXT
189
190AM_CONDITIONAL(NATIVE_LINKER,
191  test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
192AM_CONDITIONAL(GCC, test "$GCC" = yes)
193
194dnl Some architectures do not support taking pointers of functions
195dnl defined in shared libraries except in -fPIC mode.  We need to
196dnl tell the unittest framework if we're compiling for one of those
197dnl targets, so it doesn't try to run the tests that do that.
198AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
199  case $target_cpu in
200    i?86) true;;
201    x86_64) false;;
202    sparc64) false;;
203    *) true;;
204  esac])
205
206dnl Test for __thread support.
207AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
208[AC_COMPILE_IFELSE([__thread int i = 1;],
209[gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
210
211AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
212
213dnl On GNU/Linux TLS in static programs only works when using glibc
214dnl 2.4 or later.
215AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
216[AC_COMPILE_IFELSE([
217#include <features.h>
218#if !defined __GLIBC__
219error
220#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
221error
222#endif
223], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
224
225AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
226
227dnl Test for #pragma omp threadprivate
228AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
229[save_CFLAGS="$CFLAGS"
230CFLAGS="$CFLAGS -fopenmp"
231AC_COMPILE_IFELSE([
232#include <omp.h>
233int i;
234#pragma omp threadprivate (i)
235], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
236CFLAGS="$save_CFLAGS"])
237if test "$gold_cv_c_threadprivate" = "yes"; then
238  AC_DEFINE(HAVE_OMP_SUPPORT, 1,
239	    [Define if compiler supports #pragma omp threadprivate])
240fi
241AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
242
243dnl Test for the -ftls-dialect=gnu2 option.
244save_CFLAGS="$CFLAGS"
245CFLAGS="$CFLAGS -mtls-dialect=gnu2"
246AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
247CFLAGS="$save_CFLAGS"
248AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
249
250dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
251dnl only with glibc 2.5 or later.
252AC_CACHE_CHECK([for glibc >= 2.5], [gold_cv_lib_glibc25],
253[AC_COMPILE_IFELSE([
254#include <features.h>
255#if !defined __GLIBC__
256error
257#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 5)
258error
259#endif
260], [gold_cv_lib_glibc25=yes], [gold_cv_lib_glibc25=no])])
261
262AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc25" = "yes")
263
264dnl Check whether the compiler supports constructor priorities in
265dnl attributes, which were added in gcc 4.3.
266AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
267[AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
268[gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])
269
270AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")
271
272dnl Test for the -frandom-seed option.
273AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
274[save_CFLAGS="$CFLAGS"
275CFLAGS="$CFLAGS -frandom-seed=foo"
276AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
277[gold_cv_c_random_seed=no])
278CFLAGS="$save_CFLAGS"])
279if test "$gold_cv_c_random_seed" = "yes"; then
280  # In Makefile, '$@' will be expanded to be the name of the file
281  # being built, providing a unique seed for each file.
282  RANDOM_SEED_CFLAGS=-frandom-seed=\$@
283fi
284AC_SUBST(RANDOM_SEED_CFLAGS)
285
286AM_BINUTILS_WARNINGS
287
288WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//'`
289AC_SUBST(WARN_CXXFLAGS)
290
291dnl Force support for large files by default.  This may need to be
292dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
293LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
294AC_SUBST(LFS_CFLAGS)
295
296AC_REPLACE_FUNCS(pread)
297
298# Link in zlib if we can.  This allows us to write compressed sections.
299AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
300AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
301
302AC_LANG_PUSH(C++)
303
304AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
305AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
306AC_CHECK_FUNCS(mallinfo)
307
308# gcc 4.3.0 doesn't recognize the printf attribute on a template
309# function.  Check for that.  This is gcc bug 35546.  This test can
310# probably be removed after the bug has been fixed for a while.
311AC_CACHE_CHECK([whether we can use attributes with template functions],
312[gold_cv_template_attribute],
313[AC_COMPILE_IFELSE([
314template<typename T> extern void foo(const char*, ...)
315  __attribute__ ((__format__ (__printf__, 1, 2)));
316template<typename T> void foo(const char* format, ...) {}
317void bar() { foo<int>("%s\n", "foo"); }
318], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
319if test "$gold_cv_template_attribute" = "yes"; then
320  AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
321	    [Define if attributes work on C++ templates])
322fi
323
324AC_LANG_POP(C++)
325
326AM_MAINTAINER_MODE
327
328AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)
329