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re PR fortran/47728 ([OOP] ICE on invalid CLASS declaration)
[thirdparty/gcc.git] / libquadmath / configure.ac
CommitLineData
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1# Process this file with autoconf to produce a configure script, like so:
2# aclocal && autoconf && autoheader && automake
3
4AC_PREREQ(2.64)
5AC_INIT([GCC Quad-precision Math Library], 0.1,,[libquadmath])
6AC_CONFIG_HEADER(config.h)
7
8# Gets build, host, target, *_vendor, *_cpu, *_os, etc.
9#
10# You will slowly go insane if you do not grok the following fact: when
11# building this library, the top-level /target/ becomes the library's /host/.
12#
13# configure then causes --target to default to --host, exactly like any
14# other package using autoconf. Therefore, 'target' and 'host' will
15# always be the same. This makes sense both for native and cross compilers
16# just think about it for a little while. :-)
17#
18# Also, if this library is being configured as part of a cross compiler, the
19# top-level configure script will pass the "real" host as $with_cross_host.
20#
21# Do not delete or change the following two lines. For why, see
22# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
23AC_CANONICAL_SYSTEM
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24ACX_NONCANONICAL_TARGET
25
1ec601bf 26target_alias=${target_alias-$host_alias}
fabfcf5e 27AC_SUBST(target_alias)
1ec601bf 28
a6098a28 29AM_INIT_AUTOMAKE([1.9.0 foreign subdir-objects no-dist -Wall -Wno-override -Werror])
1ec601bf 30
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31AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
32AC_ARG_ENABLE(version-specific-runtime-libs,
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33AS_HELP_STRING([--enable-version-specific-runtime-libs],
34 [specify that runtime libraries should be installed in a compiler-specific directory]),
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35[case "$enableval" in
36 yes) version_specific_libs=yes ;;
37 no) version_specific_libs=no ;;
38 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
39 esac],
40[version_specific_libs=no])
41AC_MSG_RESULT($version_specific_libs)
42
fabfcf5e 43GCC_NO_EXECUTABLES
1ec601bf 44
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45AC_USE_SYSTEM_EXTENSIONS
46
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47# See if makeinfo has been installed and is modern enough
48# that we can use it.
49ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
50 [GNU texinfo.* \([0-9][0-9.]*\)],
51 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
52AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
53
642d2873 54ACX_BUGURL([http://gcc.gnu.org/bugs.html])
4c993c44 55
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56# Configure libtool
57AM_PROG_LIBTOOL
7de6ba7a 58ACX_LT_HOST_FLAGS
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59AC_SUBST(enable_shared)
60AC_SUBST(enable_static)
61
62AM_MAINTAINER_MODE
63AM_ENABLE_MULTILIB(, ..)
64
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65AC_LANG_C
66# The same as in boehm-gc and libstdc++. Have to borrow it from there.
67# We must force CC to /not/ be precious variables; otherwise
68# the wrong, non-multilib-adjusted value will be used in multilibs.
69# As a side effect, we have to subst CFLAGS ourselves.
70
71m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
72m4_define([_AC_ARG_VAR_PRECIOUS],[])
73AC_PROG_CC
74m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
75
76AC_SUBST(CFLAGS)
77
78AM_PROG_CC_C_O
79
80if test "x$GCC" != "xyes"; then
81 AC_MSG_ERROR([libquadmath must be built with GCC])
82fi
83AC_PROG_CPP
84
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85# Calculate toolexeclibdir
86# Also toolexecdir, though it's only used in toolexeclibdir
87case ${version_specific_libs} in
88 yes)
89 # Need the gcc compiler version to know where to install libraries
90 # and header files if --enable-version-specific-runtime-libs option
91 # is selected.
92 toolexecdir='$(libdir)/gcc/$(target_alias)'
93 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
94 ;;
95 no)
96 if test -n "$with_cross_host" &&
97 test x"$with_cross_host" != x"no"; then
98 # Install a library built with a cross compiler in tooldir, not libdir.
99 toolexecdir='$(exec_prefix)/$(target_alias)'
100 toolexeclibdir='$(toolexecdir)/lib'
101 else
102 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
103 toolexeclibdir='$(libdir)'
104 fi
105 multi_os_directory=`$CC -print-multi-os-directory`
106 case $multi_os_directory in
107 .) ;; # Avoid trailing /.
108 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
109 esac
110 ;;
111esac
112AC_SUBST(toolexecdir)
113AC_SUBST(toolexeclibdir)
114
1d92226b 115AC_CHECK_HEADERS(fenv.h langinfo.h wchar.h wctype.h limits.h ctype.h printf.h errno.h)
e8d42d28 116
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117# If available, sqrtl and cbrtl speed up the calculation -
118# but they are not required
119if test x$gcc_no_link != xyes; then
120 AC_CHECK_LIB([m],[sqrtl],[AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])])
121 AC_CHECK_LIB([m],[cbrtl],[AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])])
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122 AC_CHECK_LIB([m],[feholdexcept],[AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])])
123 AC_CHECK_LIB([m],[fesetround],[AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])])
124 AC_CHECK_LIB([m],[feupdateenv],[AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])])
125 AC_CHECK_LIB([m],[fesetenv],[AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])])
126 AC_CHECK_LIB([m],[fetestexcept],[AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])])
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127else
128 if test "x$ac_cv_lib_m_sqrtl" = x""yes; then
129 AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])
130 fi
131 if test "x$ac_cv_lib_m_cbrtl" = x""yes; then
132 AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])
133 fi
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134 if test "x$ac_cv_lib_m_feholdexcept" = x""yes; then
135 AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])
136 fi
137 if test "x$ac_cv_lib_m_fesetround" = x""yes; then
138 AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])
139 fi
140 if test "x$ac_cv_lib_m_feupdateenv" = x""yes; then
141 AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])
142 fi
143 if test "x$ac_cv_lib_m_fesetenv" = x""yes; then
144 AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])
145 fi
146 if test "x$ac_cv_lib_m_fetestexcept" = x""yes; then
147 AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])
148 fi
6f468984 149fi
1ec601bf 150
1d92226b 151# Check for hidden visibility (copied from libssp).
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152saved_CFLAGS="$CFLAGS"
153CFLAGS="$CFLAGS -Werror"
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154AC_MSG_CHECKING([whether hidden visibility is supported])
155AC_TRY_COMPILE([
156void __attribute__((visibility ("hidden"))) bar (void) {}],,
157[quadmath_hidden=yes],[quadmath_hidden=no])
158AC_MSG_RESULT($quadmath_hidden)
159if test x$quadmath_hidden = xyes; then
160 AC_DEFINE([HAVE_HIDDEN_VISIBILITY],[1],[__attribute__((visibility ("hidden"))) supported])
161fi
49f0e1ba 162CFLAGS="$saved_CFLAGS"
1d92226b 163
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164# Check for symbol versioning (copied from libssp).
165AC_MSG_CHECKING([whether symbol versioning is supported])
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166if test x$gcc_no_link = xyes; then
167 # If we cannot link, we cannot build shared libraries, so do not use
168 # symbol versioning.
169 quadmath_use_symver=no
170else
171 save_LDFLAGS="$LDFLAGS"
172 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
173 cat > conftest.map <<EOF
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174FOO_1.0 {
175 global: *foo*; bar; local: *;
176};
177EOF
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178 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=gnu],[quadmath_use_symver=no])
179 if test x$quadmath_use_symver = xno; then
180 case "$target_os" in
181 solaris2*)
182 LDFLAGS="$save_LDFLAGS"
183 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
184 # Sun ld cannot handle wildcards and treats all entries as undefined.
185 cat > conftest.map <<EOF
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186FOO_1.0 {
187 global: foo; local: *;
188};
189EOF
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190 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=sun],[quadmath_use_symver=no])
191 ;;
192 esac
193 fi
194 LDFLAGS="$save_LDFLAGS"
1ec601bf 195fi
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196AC_MSG_RESULT($quadmath_use_symver)
197AM_CONDITIONAL(LIBQUAD_USE_SYMVER, [test "x$quadmath_use_symver" != xno])
198AM_CONDITIONAL(LIBQUAD_USE_SYMVER_GNU, [test "x$quadmath_use_symver" = xgnu])
199AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun])
200
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201AC_CACHE_CHECK([whether __float128 is supported], [libquad_cv_have_float128],
202 [GCC_TRY_COMPILE_OR_LINK([
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203 typedef _Complex float __attribute__((mode(TC))) __complex128;
204
205 __float128 foo (__float128 x)
206 {
207
208 __complex128 z1, z2;
209
210 z1 = x;
211 z2 = x / 7.Q;
212 z2 /= z1;
213
214 return (__float128) z2;
215 }
216
217 __float128 bar (__float128 x)
218 {
219 return x * __builtin_huge_valq ();
220 }
221 ],[
222 foo (1.2Q);
223 bar (1.2Q);
224 ],[
abccc9a9 225 libquad_cv_have_float128=yes
1ec601bf 226 ],[
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227 libquad_cv_have_float128=no
228])])
229AM_CONDITIONAL(BUILD_LIBQUADMATH, [test "x$libquad_cv_have_float128" = xyes])
1ec601bf 230
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231# Check for printf hook support.
232AC_MSG_CHECKING([whether printf hooks are supported])
233AC_TRY_COMPILE([
234#include <printf.h>
235#include <stdarg.h>
236#include <stdlib.h>
237extern void flt128_va (void *, va_list *);
238extern int flt128_ais (const struct printf_info *, size_t, int *, int *);
239extern int flt128_printf_fp (FILE *, const struct printf_info *, const void *const *);
240],[
241int pa_flt128 = register_printf_type (flt128_va);
242int mod_Q = register_printf_modifier (L"Q");
243int res = register_printf_specifier ('f', flt128_printf_fp, flt128_ais);
244],
245[quadmath_printf_hooks=yes],[quadmath_printf_hooks=no])
246AC_MSG_RESULT($quadmath_printf_hooks)
247if test x$quadmath_printf_hooks = xyes; then
248 AC_DEFINE([HAVE_PRINTF_HOOKS],[1],[GNU C Library stype printf hooks supported])
249fi
250
251# Check for whether locale support for quadmath_snprintf or Q printf hooks
252# should be provided.
253AC_MSG_CHECKING([whether locale support for quadmath_snprintf should be added])
254AC_TRY_COMPILE([#include <langinfo.h>],[
255const char *s;
256s = nl_langinfo (DECIMAL_POINT);
257s = nl_langinfo (MON_DECIMAL_POINT);
258s = nl_langinfo (GROUPING);
259s = nl_langinfo (MON_GROUPING);
260s = nl_langinfo (THOUSANDS_SEP);
261s = nl_langinfo (MON_THOUSANDS_SEP);
262s = nl_langinfo (_NL_NUMERIC_DECIMAL_POINT_WC);
263s = nl_langinfo (_NL_MONETARY_DECIMAL_POINT_WC);
264s = nl_langinfo (_NL_NUMERIC_THOUSANDS_SEP_WC);
265s = nl_langinfo (_NL_MONETARY_THOUSANDS_SEP_WC);
266s = nl_langinfo (_NL_CTYPE_MB_CUR_MAX);
267(void) s;
268],
269[quadmath_use_locale_support=yes],[quadmath_use_locale_support=no])
270AC_MSG_RESULT($quadmath_use_locale_support)
271if test x$quadmath_use_locale_support = xyes; then
272 AC_DEFINE([USE_LOCALE_SUPPORT],[1],[whether nl_langinfo is sufficiently supported])
273fi
274
275# Check for whether i18n number rewriting support for quadmath_snprintf
276# or Q printf hooks should be provided.
277AC_MSG_CHECKING([whether i18n number rewriting support for quadmath_snprintf should be added])
278AC_TRY_COMPILE([#include <langinfo.h>
279#include <limits.h>
280#include <string.h>
281#include <wchar.h>
282#include <wctype.h>],[
283const char *s;
284char decimal[MB_LEN_MAX];
285wctrans_t map = wctrans ("to_outpunct");
286wint_t wdecimal = towctrans (L'.', map);
287mbstate_t state;
288memset (&state, '\0', sizeof (state));
289wcrtomb (decimal, wdecimal, &state);
290s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_MB);
291s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_WC);
292(void) s;
293],
294[quadmath_use_i18n_number_h=yes],[quadmath_use_i18n_number_h=no])
295AC_MSG_RESULT($quadmath_use_i18n_number_h)
296if test x$quadmath_use_i18n_number_h = xyes; then
297 AC_DEFINE([USE_I18N_NUMBER_H],[1],[whether i18n number rewriting can be supported])
298fi
299
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300AC_CACHE_SAVE
301
302if test ${multilib} = yes; then
303 multilib_arg="--enable-multilib"
304else
305 multilib_arg=
306fi
307
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308
309# We would like our source tree to be readonly. However when releases or
310# pre-releases are generated, the flex/bison generated files as well as the
311# various formats of manuals need to be included along with the rest of the
312# sources. Therefore we have --enable-generated-files-in-srcdir to do
313# just that.
314AC_MSG_CHECKING(generated-files-in-srcdir)
315AC_ARG_ENABLE(generated-files-in-srcdir,
316AS_HELP_STRING([--enable-generated-files-in-srcdir],
317 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
318[case "$enableval" in
319 yes) enable_generated_files_in_srcdir=yes ;;
320 no) enable_generated_files_in_srcdir=no ;;
321 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
322 esac],
323[enable_generated_files_in_srcdir=no])
324AC_MSG_RESULT($enable_generated_files_in_srcdir)
325AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
326
327
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328AC_CONFIG_FILES(Makefile)
329AC_OUTPUT