Don't pass around the target in order to define symbols; get it from
[external/binutils.git] / gold / configure.ac
1 dnl Process this file with autoconf to produce a configure script.
2
3 AC_PREREQ(2.59)
4
5 AC_INIT(gold, 0.1)
6 AC_CONFIG_SRCDIR(gold.cc)
7
8 AC_CANONICAL_TARGET
9
10 AM_INIT_AUTOMAKE
11
12 AM_CONFIG_HEADER(config.h:config.in)
13
14 AC_ARG_WITH(sysroot,
15 [  --with-sysroot[=DIR]    search for usr/lib et al within DIR],
16 [sysroot=$withval], [sysroot=no])
17
18 if test "$sysroot" = "yes"; then
19   sysroot='${exec_prefix}/${target_alias}/sys-root'
20 elif test "$sysroot" = "no"; then
21   sysroot=
22 fi
23
24 sysroot_relocatable=0
25 if test -n "$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
34 fi
35
36 AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT, "$sysroot",
37   [System root for target files])
38 AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT_RELOCATABLE, $sysroot_relocatable,
39   [Whether the system root can be relocated])
40
41 dnl For now threads are a configure time option.
42 AC_ARG_ENABLE([threads],
43 [  --enable-threads        multi-threaded linking],
44 [case "${enableval}" in
45   yes | "") threads=yes ;;
46   no) threads=no ;;
47   *) threads=yes ;;
48  esac],
49 [threads=no])
50 if test "$threads" = "yes"; then
51   AC_DEFINE(ENABLE_THREADS, 1,
52             [Define to do multi-threaded linking])
53 fi
54 AM_CONDITIONAL(THREADS, test "$threads" = "yes")
55
56 AC_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     ;;
68 esac],
69 [# For now, enable all targets by default
70  enable_targets=all
71 ])
72
73 # Canonicalize the enabled targets.
74 if 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
84 fi
85
86 # See which specific instantiations we need.
87 targetobjs=
88 all_targets=
89 for targ in $target $canon_targets; do
90   targ_32_little=
91   targ_32_big=
92   targ_64_little=
93   targ_64_big=
94   if test "$targ" = "all"; then
95     targ_32_little=yes
96     targ_32_big=yes
97     targ_64_little=yes
98     targ_64_big=yes
99     all_targets=yes
100   else
101     case "$targ" in
102     i?86-*)
103       targ_32_little=yes
104       targetobjs="$targetobjs i386.\$(OBJEXT)"
105       ;;
106     x86_64-*)
107       targ_64_little=yes
108       targetobjs="$targetobjs x86_64.\$(OBJEXT)"
109       ;;
110     *)
111       AC_MSG_ERROR("unsupported target $targ")
112       ;;
113     esac
114   fi
115 done
116
117 if test -n "$targ_32_little"; then
118   AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
119               [Define to support 32-bit little-endian targets])
120 fi
121 if test -n "$targ_32_big"; then
122   AC_DEFINE(HAVE_TARGET_32_BIG, 1,
123               [Define to support 32-bit big-endian targets])
124 fi
125 if test -n "$targ_64_little"; then
126   AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
127               [Define to support 64-bit little-endian targets])
128 fi
129 if test -n "$targ_64_big"; then
130   AC_DEFINE(HAVE_TARGET_64_BIG, 1,
131               [Define to support 64-bit big-endian targets])
132 fi
133
134 if test -n "$all_targets"; then
135   TARGETOBJS='$(ALL_TARGETOBJS)'
136 else
137   TARGETOBJS="$targetobjs"
138 fi
139 AC_SUBST(TARGETOBJS)
140
141 AC_PROG_CC
142 AC_PROG_CXX
143 AC_PROG_YACC
144 AC_PROG_RANLIB
145 AC_PROG_INSTALL
146 AC_PROG_LN_S
147
148 AC_GNU_SOURCE
149
150 ZW_GNU_GETTEXT_SISTER_DIR
151 AM_PO_SUBDIRS
152
153 AC_C_BIGENDIAN
154
155 AC_EXEEXT
156
157 AM_CONDITIONAL(NATIVE_LINKER,
158   test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
159 AM_CONDITIONAL(GCC, test "$GCC" = yes)
160 AM_CONDITIONAL(OBJDUMP_AND_CPPFILT,
161         [objdump --help >/dev/null && c++filt --help >/dev/null])
162
163 dnl Some architectures do not support taking pointers of functions
164 dnl defined in shared libraries except in -fPIC mode.  We need to
165 dnl tell the unittest framework if we're compiling for one of those
166 dnl targets, so it doesn't try to run the tests that do that.
167 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
168   case $target_cpu in
169     i?86) true;;
170     x86_64) false;;
171     *) true;;
172   esac])
173
174 dnl Test for __thread support.
175 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
176 [AC_COMPILE_IFELSE([__thread int i = 1;],
177 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
178
179 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
180
181 dnl On GNU/Linux TLS in static programs only works when using glibc
182 dnl 2.4 or later.
183 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
184 [AC_COMPILE_IFELSE([
185 #include <features.h>
186 #if !defined __GLIBC__
187 error
188 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
189 error
190 #endif
191 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
192
193 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
194
195 AM_BINUTILS_WARNINGS
196
197 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//'`
198 AC_SUBST(WARN_CXXFLAGS)
199
200 dnl Force support for large files by default.  This may need to be
201 dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
202 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
203 AC_SUBST(LFS_CFLAGS)
204
205 AC_REPLACE_FUNCS(pread)
206
207 # Link in zlib if we can.  This allows us to write compressed sections.
208 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
209
210 AC_LANG_PUSH(C++)
211
212 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
213 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
214 AC_CHECK_FUNCS(mallinfo)
215
216 dnl Test whether the compiler can specify a member templates to call.
217 AC_CACHE_CHECK([template member calls], [gold_cv_c_membertemplates],
218 [AC_COMPILE_IFELSE([
219 class c { public: template<int i> void fn(); };
220 template<int i> void foo(c cv) { cv.fn<i>(); }
221 template void foo<1>(c cv);],
222 [gold_cv_c_membertemplates=yes], [gold_cv_c_membertemplates=no])])
223
224 if test "$gold_cv_c_membertemplates" = "yes"; then
225   AC_DEFINE(HAVE_MEMBER_TEMPLATE_SPECIFICATIONS, [],
226     [Whether the C++ compiler can call a template member with no arguments])
227 fi
228
229 AC_LANG_POP(C++)
230
231 AM_MAINTAINER_MODE
232
233 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)