1 # Process this file with autoconf to produce a configure script, like so:
2 # aclocal && autoconf && autoheader && automake
5 AC_INIT([GCC Quad-precision Math Library], 0.1,,[libquadmath])
6 AC_CONFIG_HEADER(config.h)
8 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
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/.
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. :-)
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 $with_cross_host.
21 # Do not delete or change the following two lines. For why, see
22 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
24 ACX_NONCANONICAL_TARGET
26 AM_ENABLE_MULTILIB(, ..)
28 target_alias=${target_alias-$host_alias}
29 AC_SUBST(target_alias)
31 AM_INIT_AUTOMAKE([1.9.0 foreign subdir-objects no-dist -Wall -Wno-override -Werror])
33 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
34 AC_ARG_ENABLE(version-specific-runtime-libs,
35 AS_HELP_STRING([--enable-version-specific-runtime-libs],
36 [specify that runtime libraries should be installed in a compiler-specific directory]),
38 yes) version_specific_libs=yes ;;
39 no) version_specific_libs=no ;;
40 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
42 [version_specific_libs=no])
43 AC_MSG_RESULT($version_specific_libs)
47 AC_USE_SYSTEM_EXTENSIONS
49 # See if makeinfo has been installed and is modern enough
51 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
52 [GNU texinfo.* \([0-9][0-9.]*\)],
53 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
54 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
56 ACX_BUGURL([https://gcc.gnu.org/bugs/])
61 AC_SUBST(enable_shared)
62 AC_SUBST(enable_static)
67 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
68 # We must force CC to /not/ be precious variables; otherwise
69 # the wrong, non-multilib-adjusted value will be used in multilibs.
70 # As a side effect, we have to subst CFLAGS ourselves.
72 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
73 m4_define([_AC_ARG_VAR_PRECIOUS],[])
75 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
81 if test "x$GCC" != "xyes"; then
82 AC_MSG_ERROR([libquadmath must be built with GCC])
86 # Calculate toolexeclibdir
87 # Also toolexecdir, though it's only used in toolexeclibdir
88 case ${version_specific_libs} in
90 # Need the gcc compiler version to know where to install libraries
91 # and header files if --enable-version-specific-runtime-libs option
93 toolexecdir='$(libdir)/gcc/$(target_alias)'
94 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
97 if test -n "$with_cross_host" &&
98 test x"$with_cross_host" != x"no"; then
99 # Install a library built with a cross compiler in tooldir, not libdir.
100 toolexecdir='$(exec_prefix)/$(target_alias)'
101 toolexeclibdir='$(toolexecdir)/lib'
103 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
104 toolexeclibdir='$(libdir)'
106 multi_os_directory=`$CC -print-multi-os-directory`
107 case $multi_os_directory in
108 .) ;; # Avoid trailing /.
109 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
113 AC_SUBST(toolexecdir)
114 AC_SUBST(toolexeclibdir)
116 AC_CHECK_HEADERS(fenv.h langinfo.h locale.h wchar.h wctype.h limits.h ctype.h printf.h errno.h)
117 LIBQUAD_CHECK_MATH_H_SIGNGAM
119 # If available, sqrtl and cbrtl speed up the calculation -
120 # but they are not required
121 if test x$gcc_no_link != xyes; then
122 AC_CHECK_LIB([m],[sqrtl],[AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])])
123 AC_CHECK_LIB([m],[cbrtl],[AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])])
124 AC_CHECK_LIB([m],[feholdexcept],[AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])])
125 AC_CHECK_LIB([m],[fesetround],[AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])])
126 AC_CHECK_LIB([m],[feupdateenv],[AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])])
127 AC_CHECK_LIB([m],[fesetenv],[AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])])
128 AC_CHECK_LIB([m],[fetestexcept],[AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])])
129 AC_CHECK_FUNCS(strtoull)
131 if test "x$ac_cv_lib_m_sqrtl" = x""yes; then
132 AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])
134 if test "x$ac_cv_lib_m_cbrtl" = x""yes; then
135 AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])
137 if test "x$ac_cv_lib_m_feholdexcept" = x""yes; then
138 AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])
140 if test "x$ac_cv_lib_m_fesetround" = x""yes; then
141 AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])
143 if test "x$ac_cv_lib_m_feupdateenv" = x""yes; then
144 AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])
146 if test "x$ac_cv_lib_m_fesetenv" = x""yes; then
147 AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])
149 if test "x$ac_cv_lib_m_fetestexcept" = x""yes; then
150 AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])
154 # Check for hidden visibility (copied from libssp).
155 saved_CFLAGS="$CFLAGS"
156 CFLAGS="$CFLAGS -Werror"
157 AC_MSG_CHECKING([whether hidden visibility is supported])
159 void __attribute__((visibility ("hidden"))) bar (void) {}],,
160 [quadmath_hidden=yes],[quadmath_hidden=no])
161 AC_MSG_RESULT($quadmath_hidden)
162 if test x$quadmath_hidden = xyes; then
163 AC_DEFINE([HAVE_HIDDEN_VISIBILITY],[1],[__attribute__((visibility ("hidden"))) supported])
165 CFLAGS="$saved_CFLAGS"
167 # Check for symbol versioning (copied from libssp).
168 AC_MSG_CHECKING([whether symbol versioning is supported])
169 AC_ARG_ENABLE(symvers,
170 AS_HELP_STRING([--disable-symvers],
171 [disable symbol versioning for libquadmath]),
172 quadmath_use_symver=$enableval,
173 quadmath_use_symver=yes)
174 if test "x$quadmath_use_symver" != xno; then
175 if test x$gcc_no_link = xyes; then
176 # If we cannot link, we cannot build shared libraries, so do not use
178 quadmath_use_symver=no
180 save_LDFLAGS="$LDFLAGS"
181 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
182 cat > conftest.map <<EOF
184 global: *foo*; bar; local: *;
187 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=gnu],[quadmath_use_symver=no])
188 if test x$quadmath_use_symver = xno; then
191 LDFLAGS="$save_LDFLAGS"
192 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
193 # Sun ld cannot handle wildcards and treats all entries as undefined.
194 cat > conftest.map <<EOF
196 global: foo; local: *;
199 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=sun],[quadmath_use_symver=no])
203 LDFLAGS="$save_LDFLAGS"
206 AC_MSG_RESULT($quadmath_use_symver)
207 AM_CONDITIONAL(LIBQUAD_USE_SYMVER, [test "x$quadmath_use_symver" != xno])
208 AM_CONDITIONAL(LIBQUAD_USE_SYMVER_GNU, [test "x$quadmath_use_symver" = xgnu])
209 AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun])
211 AC_CACHE_CHECK([whether __float128 is supported], [libquad_cv_have_float128],
212 [GCC_TRY_COMPILE_OR_LINK([
213 typedef _Complex float __attribute__((mode(TC))) __complex128;
215 __float128 foo (__float128 x)
224 return (__float128) z2;
227 __float128 bar (__float128 x)
229 return x * __builtin_huge_valq ();
235 libquad_cv_have_float128=yes
237 libquad_cv_have_float128=no
239 AM_CONDITIONAL(BUILD_LIBQUADMATH, [test "x$libquad_cv_have_float128" = xyes])
241 # Check for printf hook support.
242 AC_MSG_CHECKING([whether printf hooks are supported])
247 extern void flt128_va (void *, va_list *);
248 extern int flt128_ais (const struct printf_info *, size_t, int *, int *);
249 extern int flt128_printf_fp (FILE *, const struct printf_info *, const void *const *);
251 int pa_flt128 = register_printf_type (flt128_va);
252 int mod_Q = register_printf_modifier (L"Q");
253 int res = register_printf_specifier ('f', flt128_printf_fp, flt128_ais);
254 struct printf_info info = { .user = -1 };
256 [quadmath_printf_hooks=yes],[quadmath_printf_hooks=no])
257 AC_MSG_RESULT($quadmath_printf_hooks)
258 if test x$quadmath_printf_hooks = xyes; then
259 AC_DEFINE([HAVE_PRINTF_HOOKS],[1],[GNU C Library stype printf hooks supported])
262 # Check for whether locale support for quadmath_snprintf or Q printf hooks
263 # should be provided.
264 AC_MSG_CHECKING([whether nl_langinfo should be used])
265 AC_TRY_COMPILE([#include <langinfo.h>],[
267 s = nl_langinfo (DECIMAL_POINT);
268 s = nl_langinfo (MON_DECIMAL_POINT);
269 s = nl_langinfo (GROUPING);
270 s = nl_langinfo (MON_GROUPING);
271 s = nl_langinfo (THOUSANDS_SEP);
272 s = nl_langinfo (MON_THOUSANDS_SEP);
275 [quadmath_use_nl_langinfo=yes],[quadmath_use_nl_langinfo=no])
276 AC_MSG_RESULT($quadmath_use_nl_langinfo)
277 if test x$quadmath_use_nl_langinfo = xyes; then
278 AC_DEFINE([USE_NL_LANGINFO],[1],[whether nl_langinfo should be used])
281 AC_MSG_CHECKING([whether nl_langinfo should be used for wide char locale info])
282 AC_TRY_COMPILE([#include <langinfo.h>],[
284 s = nl_langinfo (_NL_NUMERIC_DECIMAL_POINT_WC);
285 s = nl_langinfo (_NL_MONETARY_DECIMAL_POINT_WC);
286 s = nl_langinfo (_NL_NUMERIC_THOUSANDS_SEP_WC);
287 s = nl_langinfo (_NL_MONETARY_THOUSANDS_SEP_WC);
290 [quadmath_use_nl_langinfo_wc=yes],[quadmath_use_nl_langinfo_wc=no])
291 AC_MSG_RESULT($quadmath_use_nl_langinfo_wc)
292 if test x$quadmath_use_nl_langinfo_wc = xyes; then
293 AC_DEFINE([USE_NL_LANGINFO_WC],[1],[whether nl_langinfo should be used for wide char locale info])
296 AC_MSG_CHECKING([whether localeconv should be used])
297 AC_TRY_COMPILE([#include <locale.h>],[
298 const struct lconv *l = localeconv ();
300 s = l->decimal_point;
301 s = l->mon_decimal_point;
304 s = l->thousands_sep;
305 s = l->mon_thousands_sep;
308 [quadmath_use_localeconv=yes],[quadmath_use_localeconv=no])
309 AC_MSG_RESULT($quadmath_use_localeconv)
310 if test x$quadmath_use_localeconv = xyes; then
311 AC_DEFINE([USE_LOCALECONV],[1],[whether localeconv should be used])
314 # Check for whether i18n number rewriting support for quadmath_snprintf
315 # or Q printf hooks should be provided.
316 AC_MSG_CHECKING([whether i18n number rewriting support for quadmath_snprintf should be added])
317 AC_TRY_COMPILE([#include <langinfo.h>
321 #include <wctype.h>],[
323 char decimal[MB_LEN_MAX];
324 wctrans_t map = wctrans ("to_outpunct");
325 wint_t wdecimal = towctrans (L'.', map);
327 memset (&state, '\0', sizeof (state));
328 wcrtomb (decimal, wdecimal, &state);
329 s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_MB);
330 s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_WC);
331 s = nl_langinfo (_NL_CTYPE_MB_CUR_MAX);
334 [quadmath_use_i18n_number_h=yes],[quadmath_use_i18n_number_h=no])
335 AC_MSG_RESULT($quadmath_use_i18n_number_h)
336 if test x$quadmath_use_i18n_number_h = xyes; then
337 AC_DEFINE([USE_I18N_NUMBER_H],[1],[whether i18n number rewriting can be supported])
342 if test ${multilib} = yes; then
343 multilib_arg="--enable-multilib"
349 # We would like our source tree to be readonly. However when releases or
350 # pre-releases are generated, the flex/bison generated files as well as the
351 # various formats of manuals need to be included along with the rest of the
352 # sources. Therefore we have --enable-generated-files-in-srcdir to do
354 AC_MSG_CHECKING(generated-files-in-srcdir)
355 AC_ARG_ENABLE(generated-files-in-srcdir,
356 AS_HELP_STRING([--enable-generated-files-in-srcdir],
357 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
358 [case "$enableval" in
359 yes) enable_generated_files_in_srcdir=yes ;;
360 no) enable_generated_files_in_srcdir=no ;;
361 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
363 [enable_generated_files_in_srcdir=no])
364 AC_MSG_RESULT($enable_generated_files_in_srcdir)
365 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
367 # Determine what GCC version number to use in filesystem paths.
370 AC_CONFIG_FILES(Makefile)