1 # Process this file with autoconf to produce a configure script, like so:
2 # aclocal && autoconf && autoheader && automake
4 AC_INIT([GCC Quad-precision Math Library], 0.1,,[libquadmath])
5 AC_CONFIG_HEADER(config.h)
7 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
9 # You will slowly go insane if you do not grok the following fact: when
10 # building this library, the top-level /target/ becomes the library's /host/.
12 # configure then causes --target to default to --host, exactly like any
13 # other package using autoconf. Therefore, 'target' and 'host' will
14 # always be the same. This makes sense both for native and cross compilers
15 # just think about it for a little while. :-)
17 # Also, if this library is being configured as part of a cross compiler, the
18 # top-level configure script will pass the "real" host as $with_cross_host.
20 # Do not delete or change the following two lines. For why, see
21 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
23 ACX_NONCANONICAL_TARGET
25 AM_ENABLE_MULTILIB(, ..)
27 target_alias=${target_alias-$host_alias}
28 AC_SUBST(target_alias)
30 AM_INIT_AUTOMAKE([1.9.0 foreign subdir-objects no-dist -Wall -Wno-override -Werror])
32 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
33 AC_ARG_ENABLE(version-specific-runtime-libs,
34 AS_HELP_STRING([--enable-version-specific-runtime-libs],
35 [specify that runtime libraries should be installed in a compiler-specific directory]),
37 yes) version_specific_libs=yes ;;
38 no) version_specific_libs=no ;;
39 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
41 [version_specific_libs=no])
42 AC_MSG_RESULT($version_specific_libs)
46 AC_USE_SYSTEM_EXTENSIONS
48 # See if makeinfo has been installed and is modern enough
50 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
51 [GNU texinfo.* \([0-9][0-9.]*\)],
52 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
53 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
55 ACX_BUGURL([https://gcc.gnu.org/bugs/])
60 AC_SUBST(enable_shared)
61 AC_SUBST(enable_static)
66 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
67 # We must force CC to /not/ be precious variables; otherwise
68 # the wrong, non-multilib-adjusted value will be used in multilibs.
69 # As a side effect, we have to subst CFLAGS ourselves.
71 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
72 m4_define([_AC_ARG_VAR_PRECIOUS],[])
74 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
80 if test "x$GCC" != "xyes"; then
81 AC_MSG_ERROR([libquadmath must be built with GCC])
85 GCC_WITH_TOOLEXECLIBDIR
87 # Calculate toolexeclibdir
88 # Also toolexecdir, though it's only used in toolexeclibdir
89 case ${version_specific_libs} in
91 # Need the gcc compiler version to know where to install libraries
92 # and header files if --enable-version-specific-runtime-libs option
94 toolexecdir='$(libdir)/gcc/$(target_alias)'
95 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
98 if test -n "$with_cross_host" &&
99 test x"$with_cross_host" != x"no"; then
100 # Install a library built with a cross compiler in tooldir, not libdir.
101 toolexecdir='$(exec_prefix)/$(target_alias)'
102 case ${with_toolexeclibdir} in
104 toolexeclibdir='$(toolexecdir)/lib'
107 toolexeclibdir=${with_toolexeclibdir}
111 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
112 toolexeclibdir='$(libdir)'
114 multi_os_directory=`$CC -print-multi-os-directory`
115 case $multi_os_directory in
116 .) ;; # Avoid trailing /.
117 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
121 AC_SUBST(toolexecdir)
122 AC_SUBST(toolexeclibdir)
124 AC_CHECK_HEADERS(fenv.h langinfo.h locale.h wchar.h wctype.h limits.h ctype.h printf.h errno.h)
125 LIBQUAD_CHECK_MATH_H_SIGNGAM
127 # If available, sqrtl and cbrtl speed up the calculation -
128 # but they are not required
129 if test x$gcc_no_link != xyes; then
130 AC_CHECK_LIB([m],[sqrtl],[AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])])
131 AC_CHECK_LIB([m],[cbrtl],[AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])])
132 AC_CHECK_LIB([m],[feholdexcept],[AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])])
133 AC_CHECK_LIB([m],[fesetround],[AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])])
134 AC_CHECK_LIB([m],[feupdateenv],[AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])])
135 AC_CHECK_LIB([m],[fesetenv],[AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])])
136 AC_CHECK_LIB([m],[fetestexcept],[AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])])
137 AC_CHECK_FUNCS(strtoull)
139 if test "x$ac_cv_lib_m_sqrtl" = x""yes; then
140 AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])
142 if test "x$ac_cv_lib_m_cbrtl" = x""yes; then
143 AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])
145 if test "x$ac_cv_lib_m_feholdexcept" = x""yes; then
146 AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])
148 if test "x$ac_cv_lib_m_fesetround" = x""yes; then
149 AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])
151 if test "x$ac_cv_lib_m_feupdateenv" = x""yes; then
152 AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])
154 if test "x$ac_cv_lib_m_fesetenv" = x""yes; then
155 AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])
157 if test "x$ac_cv_lib_m_fetestexcept" = x""yes; then
158 AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])
162 # Check for hidden visibility (copied from libssp).
163 saved_CFLAGS="$CFLAGS"
164 CFLAGS="$CFLAGS -Werror"
165 AC_MSG_CHECKING([whether hidden visibility is supported])
167 void __attribute__((visibility ("hidden"))) bar (void) {}],,
168 [quadmath_hidden=yes],[quadmath_hidden=no])
169 AC_MSG_RESULT($quadmath_hidden)
170 if test x$quadmath_hidden = xyes; then
171 AC_DEFINE([HAVE_HIDDEN_VISIBILITY],[1],[__attribute__((visibility ("hidden"))) supported])
173 CFLAGS="$saved_CFLAGS"
175 # Check for symbol versioning (copied from libssp).
176 AC_MSG_CHECKING([whether symbol versioning is supported])
177 AC_ARG_ENABLE(symvers,
178 AS_HELP_STRING([--disable-symvers],
179 [disable symbol versioning for libquadmath]),
180 quadmath_use_symver=$enableval,
181 quadmath_use_symver=yes)
182 if test "x$quadmath_use_symver" != xno; then
183 if test x$gcc_no_link = xyes; then
184 # If we cannot link, we cannot build shared libraries, so do not use
186 quadmath_use_symver=no
188 save_LDFLAGS="$LDFLAGS"
189 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
190 cat > conftest.map <<EOF
192 global: *foo*; bar; local: *;
195 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=gnu],[quadmath_use_symver=no])
196 if test x$quadmath_use_symver = xno; then
199 LDFLAGS="$save_LDFLAGS"
200 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
201 # Sun ld cannot handle wildcards and treats all entries as undefined.
202 cat > conftest.map <<EOF
204 global: foo; local: *;
207 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=sun],[quadmath_use_symver=no])
211 LDFLAGS="$save_LDFLAGS"
214 AC_MSG_RESULT($quadmath_use_symver)
215 AM_CONDITIONAL(LIBQUAD_USE_SYMVER, [test "x$quadmath_use_symver" != xno])
216 AM_CONDITIONAL(LIBQUAD_USE_SYMVER_GNU, [test "x$quadmath_use_symver" = xgnu])
217 AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun])
219 AC_CACHE_CHECK([whether __float128 is supported], [libquad_cv_have_float128],
220 [GCC_TRY_COMPILE_OR_LINK([
221 #if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__)
222 typedef _Complex float __attribute__((mode(TC))) __complex128;
224 typedef _Complex float __attribute__((mode(KC))) __complex128;
227 __float128 foo (__float128 x)
236 return (__float128) z2;
239 __float128 bar (__float128 x)
241 return x * __builtin_huge_valq ();
247 libquad_cv_have_float128=yes
249 libquad_cv_have_float128=no
251 AM_CONDITIONAL(BUILD_LIBQUADMATH, [test "x$libquad_cv_have_float128" = xyes])
253 # Check for printf hook support.
254 AC_MSG_CHECKING([whether printf hooks are supported])
259 extern void flt128_va (void *, va_list *);
260 extern int flt128_ais (const struct printf_info *, size_t, int *, int *);
261 extern int flt128_printf_fp (FILE *, const struct printf_info *, const void *const *);
263 int pa_flt128 = register_printf_type (flt128_va);
264 int mod_Q = register_printf_modifier (L"Q");
265 int res = register_printf_specifier ('f', flt128_printf_fp, flt128_ais);
266 struct printf_info info = { .user = -1 };
268 [quadmath_printf_hooks=yes],[quadmath_printf_hooks=no])
269 AC_MSG_RESULT($quadmath_printf_hooks)
270 if test x$quadmath_printf_hooks = xyes; then
271 AC_DEFINE([HAVE_PRINTF_HOOKS],[1],[GNU C Library stype printf hooks supported])
274 # Check for whether locale support for quadmath_snprintf or Q printf hooks
275 # should be provided.
276 AC_MSG_CHECKING([whether nl_langinfo should be used])
277 AC_TRY_COMPILE([#include <langinfo.h>],[
279 s = nl_langinfo (DECIMAL_POINT);
280 s = nl_langinfo (MON_DECIMAL_POINT);
281 s = nl_langinfo (GROUPING);
282 s = nl_langinfo (MON_GROUPING);
283 s = nl_langinfo (THOUSANDS_SEP);
284 s = nl_langinfo (MON_THOUSANDS_SEP);
287 [quadmath_use_nl_langinfo=yes],[quadmath_use_nl_langinfo=no])
288 AC_MSG_RESULT($quadmath_use_nl_langinfo)
289 if test x$quadmath_use_nl_langinfo = xyes; then
290 AC_DEFINE([USE_NL_LANGINFO],[1],[whether nl_langinfo should be used])
293 AC_MSG_CHECKING([whether nl_langinfo should be used for wide char locale info])
294 AC_TRY_COMPILE([#include <langinfo.h>],[
296 s = nl_langinfo (_NL_NUMERIC_DECIMAL_POINT_WC);
297 s = nl_langinfo (_NL_MONETARY_DECIMAL_POINT_WC);
298 s = nl_langinfo (_NL_NUMERIC_THOUSANDS_SEP_WC);
299 s = nl_langinfo (_NL_MONETARY_THOUSANDS_SEP_WC);
302 [quadmath_use_nl_langinfo_wc=yes],[quadmath_use_nl_langinfo_wc=no])
303 AC_MSG_RESULT($quadmath_use_nl_langinfo_wc)
304 if test x$quadmath_use_nl_langinfo_wc = xyes; then
305 AC_DEFINE([USE_NL_LANGINFO_WC],[1],[whether nl_langinfo should be used for wide char locale info])
308 AC_MSG_CHECKING([whether localeconv should be used])
309 AC_TRY_COMPILE([#include <locale.h>],[
310 const struct lconv *l = localeconv ();
312 s = l->decimal_point;
313 s = l->mon_decimal_point;
316 s = l->thousands_sep;
317 s = l->mon_thousands_sep;
320 [quadmath_use_localeconv=yes],[quadmath_use_localeconv=no])
321 AC_MSG_RESULT($quadmath_use_localeconv)
322 if test x$quadmath_use_localeconv = xyes; then
323 AC_DEFINE([USE_LOCALECONV],[1],[whether localeconv should be used])
326 # Check for whether i18n number rewriting support for quadmath_snprintf
327 # or Q printf hooks should be provided.
328 AC_MSG_CHECKING([whether i18n number rewriting support for quadmath_snprintf should be added])
329 AC_TRY_COMPILE([#include <langinfo.h>
333 #include <wctype.h>],[
335 char decimal[MB_LEN_MAX];
336 wctrans_t map = wctrans ("to_outpunct");
337 wint_t wdecimal = towctrans (L'.', map);
339 memset (&state, '\0', sizeof (state));
340 wcrtomb (decimal, wdecimal, &state);
341 s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_MB);
342 s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_WC);
343 s = nl_langinfo (_NL_CTYPE_MB_CUR_MAX);
346 [quadmath_use_i18n_number_h=yes],[quadmath_use_i18n_number_h=no])
347 AC_MSG_RESULT($quadmath_use_i18n_number_h)
348 if test x$quadmath_use_i18n_number_h = xyes; then
349 AC_DEFINE([USE_I18N_NUMBER_H],[1],[whether i18n number rewriting can be supported])
352 # Add CET specific flags if CET is enabled
353 GCC_CET_FLAGS(CET_FLAGS)
354 XCFLAGS="$XCFLAGS $CET_FLAGS"
357 xpowerpc64le*-linux*)
359 [AC_LANG_PROGRAM([[#if __SIZEOF_LONG_DOUBLE__ != 16
360 #error long double is double
363 [XCFLAGS="$XCFLAGS -mno-gnu-attribute"])
372 if test ${multilib} = yes; then
373 multilib_arg="--enable-multilib"
379 # We would like our source tree to be readonly. However when releases or
380 # pre-releases are generated, the flex/bison generated files as well as the
381 # various formats of manuals need to be included along with the rest of the
382 # sources. Therefore we have --enable-generated-files-in-srcdir to do
384 AC_MSG_CHECKING(generated-files-in-srcdir)
385 AC_ARG_ENABLE(generated-files-in-srcdir,
386 AS_HELP_STRING([--enable-generated-files-in-srcdir],
387 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
388 [case "$enableval" in
389 yes) enable_generated_files_in_srcdir=yes ;;
390 no) enable_generated_files_in_srcdir=no ;;
391 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
393 [enable_generated_files_in_srcdir=no])
394 AC_MSG_RESULT($enable_generated_files_in_srcdir)
395 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
397 # Determine what GCC version number to use in filesystem paths.
400 AC_CONFIG_FILES(Makefile)