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 $with_cross_host. 20# 21# Do not delete or change the following two lines. For why, see 22# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html 23AC_CANONICAL_SYSTEM 24ACX_NONCANONICAL_TARGET 25 26target_alias=${target_alias-$host_alias} 27AC_SUBST(target_alias) 28 29AM_INIT_AUTOMAKE([1.9.0 foreign subdir-objects no-dist -Wall -Wno-override -Werror]) 30 31AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 32AC_ARG_ENABLE(version-specific-runtime-libs, 33AS_HELP_STRING([--enable-version-specific-runtime-libs], 34 [specify that runtime libraries should be installed in a compiler-specific directory]), 35[case "$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 43GCC_NO_EXECUTABLES 44 45AC_USE_SYSTEM_EXTENSIONS 46 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 $gcc_cv_prog_makeinfo_modern = "yes") 53 54ACX_BUGURL([http://gcc.gnu.org/bugs.html]) 55 56# Configure libtool 57AM_PROG_LIBTOOL 58ACX_LT_HOST_FLAGS 59AC_SUBST(enable_shared) 60AC_SUBST(enable_static) 61 62AM_MAINTAINER_MODE 63AM_ENABLE_MULTILIB(, ..) 64 65AC_LANG_C 66# The same as in boehm-gc and libstdc++. Have to borrow it from there. 67# We must force CC to /not/ be precious variables; otherwise 68# the wrong, non-multilib-adjusted value will be used in multilibs. 69# As a side effect, we have to subst CFLAGS ourselves. 70 71m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 72m4_define([_AC_ARG_VAR_PRECIOUS],[]) 73AC_PROG_CC 74m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 75 76AC_SUBST(CFLAGS) 77 78AM_PROG_CC_C_O 79 80if test "x$GCC" != "xyes"; then 81 AC_MSG_ERROR([libquadmath must be built with GCC]) 82fi 83AC_PROG_CPP 84 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/$multi_os_directory ;; 109 esac 110 ;; 111esac 112AC_SUBST(toolexecdir) 113AC_SUBST(toolexeclibdir) 114 115AC_CHECK_HEADERS(fenv.h langinfo.h locale.h wchar.h wctype.h limits.h ctype.h printf.h errno.h) 116LIBQUAD_CHECK_MATH_H_SIGNGAM 117 118# If available, sqrtl and cbrtl speed up the calculation - 119# but they are not required 120if test x$gcc_no_link != xyes; then 121 AC_CHECK_LIB([m],[sqrtl],[AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])]) 122 AC_CHECK_LIB([m],[cbrtl],[AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])]) 123 AC_CHECK_LIB([m],[feholdexcept],[AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])]) 124 AC_CHECK_LIB([m],[fesetround],[AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])]) 125 AC_CHECK_LIB([m],[feupdateenv],[AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])]) 126 AC_CHECK_LIB([m],[fesetenv],[AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])]) 127 AC_CHECK_LIB([m],[fetestexcept],[AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])]) 128 AC_CHECK_FUNCS(strtoull) 129else 130 if test "x$ac_cv_lib_m_sqrtl" = x""yes; then 131 AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl]) 132 fi 133 if test "x$ac_cv_lib_m_cbrtl" = x""yes; then 134 AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl]) 135 fi 136 if test "x$ac_cv_lib_m_feholdexcept" = x""yes; then 137 AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept]) 138 fi 139 if test "x$ac_cv_lib_m_fesetround" = x""yes; then 140 AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround]) 141 fi 142 if test "x$ac_cv_lib_m_feupdateenv" = x""yes; then 143 AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv]) 144 fi 145 if test "x$ac_cv_lib_m_fesetenv" = x""yes; then 146 AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv]) 147 fi 148 if test "x$ac_cv_lib_m_fetestexcept" = x""yes; then 149 AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept]) 150 fi 151fi 152 153# Check for hidden visibility (copied from libssp). 154saved_CFLAGS="$CFLAGS" 155CFLAGS="$CFLAGS -Werror" 156AC_MSG_CHECKING([whether hidden visibility is supported]) 157AC_TRY_COMPILE([ 158void __attribute__((visibility ("hidden"))) bar (void) {}],, 159[quadmath_hidden=yes],[quadmath_hidden=no]) 160AC_MSG_RESULT($quadmath_hidden) 161if test x$quadmath_hidden = xyes; then 162 AC_DEFINE([HAVE_HIDDEN_VISIBILITY],[1],[__attribute__((visibility ("hidden"))) supported]) 163fi 164CFLAGS="$saved_CFLAGS" 165 166# Check for symbol versioning (copied from libssp). 167AC_MSG_CHECKING([whether symbol versioning is supported]) 168AC_ARG_ENABLE(symvers, 169AS_HELP_STRING([--disable-symvers], 170 [disable symbol versioning for libquadmath]), 171quadmath_use_symver=$enableval, 172quadmath_use_symver=yes) 173if test "x$quadmath_use_symver" != xno; then 174 if test x$gcc_no_link = xyes; then 175 # If we cannot link, we cannot build shared libraries, so do not use 176 # symbol versioning. 177 quadmath_use_symver=no 178 else 179 save_LDFLAGS="$LDFLAGS" 180 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map" 181 cat > conftest.map <<EOF 182FOO_1.0 { 183 global: *foo*; bar; local: *; 184}; 185EOF 186 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=gnu],[quadmath_use_symver=no]) 187 if test x$quadmath_use_symver = xno; then 188 case "$target_os" in 189 solaris2*) 190 LDFLAGS="$save_LDFLAGS" 191 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map" 192 # Sun ld cannot handle wildcards and treats all entries as undefined. 193 cat > conftest.map <<EOF 194FOO_1.0 { 195 global: foo; local: *; 196}; 197EOF 198 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=sun],[quadmath_use_symver=no]) 199 ;; 200 esac 201 fi 202 LDFLAGS="$save_LDFLAGS" 203 fi 204fi 205AC_MSG_RESULT($quadmath_use_symver) 206AM_CONDITIONAL(LIBQUAD_USE_SYMVER, [test "x$quadmath_use_symver" != xno]) 207AM_CONDITIONAL(LIBQUAD_USE_SYMVER_GNU, [test "x$quadmath_use_symver" = xgnu]) 208AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun]) 209 210AC_CACHE_CHECK([whether __float128 is supported], [libquad_cv_have_float128], 211 [GCC_TRY_COMPILE_OR_LINK([ 212 typedef _Complex float __attribute__((mode(TC))) __complex128; 213 214 __float128 foo (__float128 x) 215 { 216 217 __complex128 z1, z2; 218 219 z1 = x; 220 z2 = x / 7.Q; 221 z2 /= z1; 222 223 return (__float128) z2; 224 } 225 226 __float128 bar (__float128 x) 227 { 228 return x * __builtin_huge_valq (); 229 } 230 ],[ 231 foo (1.2Q); 232 bar (1.2Q); 233 ],[ 234 libquad_cv_have_float128=yes 235 ],[ 236 libquad_cv_have_float128=no 237])]) 238AM_CONDITIONAL(BUILD_LIBQUADMATH, [test "x$libquad_cv_have_float128" = xyes]) 239 240# Check for printf hook support. 241AC_MSG_CHECKING([whether printf hooks are supported]) 242AC_TRY_COMPILE([ 243#include <printf.h> 244#include <stdarg.h> 245#include <stdlib.h> 246extern void flt128_va (void *, va_list *); 247extern int flt128_ais (const struct printf_info *, size_t, int *, int *); 248extern int flt128_printf_fp (FILE *, const struct printf_info *, const void *const *); 249],[ 250int pa_flt128 = register_printf_type (flt128_va); 251int mod_Q = register_printf_modifier (L"Q"); 252int res = register_printf_specifier ('f', flt128_printf_fp, flt128_ais); 253struct printf_info info = { .user = -1 }; 254], 255[quadmath_printf_hooks=yes],[quadmath_printf_hooks=no]) 256AC_MSG_RESULT($quadmath_printf_hooks) 257if test x$quadmath_printf_hooks = xyes; then 258 AC_DEFINE([HAVE_PRINTF_HOOKS],[1],[GNU C Library stype printf hooks supported]) 259fi 260 261# Check for whether locale support for quadmath_snprintf or Q printf hooks 262# should be provided. 263AC_MSG_CHECKING([whether nl_langinfo should be used]) 264AC_TRY_COMPILE([#include <langinfo.h>],[ 265const char *s; 266s = nl_langinfo (DECIMAL_POINT); 267s = nl_langinfo (MON_DECIMAL_POINT); 268s = nl_langinfo (GROUPING); 269s = nl_langinfo (MON_GROUPING); 270s = nl_langinfo (THOUSANDS_SEP); 271s = nl_langinfo (MON_THOUSANDS_SEP); 272(void) s; 273], 274[quadmath_use_nl_langinfo=yes],[quadmath_use_nl_langinfo=no]) 275AC_MSG_RESULT($quadmath_use_nl_langinfo) 276if test x$quadmath_use_nl_langinfo = xyes; then 277 AC_DEFINE([USE_NL_LANGINFO],[1],[whether nl_langinfo should be used]) 278fi 279 280AC_MSG_CHECKING([whether nl_langinfo should be used for wide char locale info]) 281AC_TRY_COMPILE([#include <langinfo.h>],[ 282const char *s; 283s = nl_langinfo (_NL_NUMERIC_DECIMAL_POINT_WC); 284s = nl_langinfo (_NL_MONETARY_DECIMAL_POINT_WC); 285s = nl_langinfo (_NL_NUMERIC_THOUSANDS_SEP_WC); 286s = nl_langinfo (_NL_MONETARY_THOUSANDS_SEP_WC); 287(void) s; 288], 289[quadmath_use_nl_langinfo_wc=yes],[quadmath_use_nl_langinfo_wc=no]) 290AC_MSG_RESULT($quadmath_use_nl_langinfo_wc) 291if test x$quadmath_use_nl_langinfo_wc = xyes; then 292 AC_DEFINE([USE_NL_LANGINFO_WC],[1],[whether nl_langinfo should be used for wide char locale info]) 293fi 294 295AC_MSG_CHECKING([whether localeconv should be used]) 296AC_TRY_COMPILE([#include <locale.h>],[ 297const struct lconv *l = localeconv (); 298const char *s; 299s = l->decimal_point; 300s = l->mon_decimal_point; 301s = l->grouping; 302s = l->mon_grouping; 303s = l->thousands_sep; 304s = l->mon_thousands_sep; 305(void) s; 306], 307[quadmath_use_localeconv=yes],[quadmath_use_localeconv=no]) 308AC_MSG_RESULT($quadmath_use_localeconv) 309if test x$quadmath_use_localeconv = xyes; then 310 AC_DEFINE([USE_LOCALECONV],[1],[whether localeconv should be used]) 311fi 312 313# Check for whether i18n number rewriting support for quadmath_snprintf 314# or Q printf hooks should be provided. 315AC_MSG_CHECKING([whether i18n number rewriting support for quadmath_snprintf should be added]) 316AC_TRY_COMPILE([#include <langinfo.h> 317#include <limits.h> 318#include <string.h> 319#include <wchar.h> 320#include <wctype.h>],[ 321const char *s; 322char decimal[MB_LEN_MAX]; 323wctrans_t map = wctrans ("to_outpunct"); 324wint_t wdecimal = towctrans (L'.', map); 325mbstate_t state; 326memset (&state, '\0', sizeof (state)); 327wcrtomb (decimal, wdecimal, &state); 328s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_MB); 329s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_WC); 330s = nl_langinfo (_NL_CTYPE_MB_CUR_MAX); 331(void) s; 332], 333[quadmath_use_i18n_number_h=yes],[quadmath_use_i18n_number_h=no]) 334AC_MSG_RESULT($quadmath_use_i18n_number_h) 335if test x$quadmath_use_i18n_number_h = xyes; then 336 AC_DEFINE([USE_I18N_NUMBER_H],[1],[whether i18n number rewriting can be supported]) 337fi 338 339AC_CACHE_SAVE 340 341if test ${multilib} = yes; then 342 multilib_arg="--enable-multilib" 343else 344 multilib_arg= 345fi 346 347 348# We would like our source tree to be readonly. However when releases or 349# pre-releases are generated, the flex/bison generated files as well as the 350# various formats of manuals need to be included along with the rest of the 351# sources. Therefore we have --enable-generated-files-in-srcdir to do 352# just that. 353AC_MSG_CHECKING(generated-files-in-srcdir) 354AC_ARG_ENABLE(generated-files-in-srcdir, 355AS_HELP_STRING([--enable-generated-files-in-srcdir], 356 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]), 357[case "$enableval" in 358 yes) enable_generated_files_in_srcdir=yes ;; 359 no) enable_generated_files_in_srcdir=no ;; 360 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 361 esac], 362[enable_generated_files_in_srcdir=no]) 363AC_MSG_RESULT($enable_generated_files_in_srcdir) 364AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) 365 366 367AC_CONFIG_FILES(Makefile) 368AC_OUTPUT 369