1# Process this file with autoconf to produce a configure script, like so: 2# aclocal && autoconf && autoheader && automake 3 4AC_INIT([GCC Quad-precision Math Library], 0.1,,[libquadmath]) 5AC_CONFIG_HEADER(config.h) 6 7# Gets build, host, target, *_vendor, *_cpu, *_os, etc. 8# 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/. 11# 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. :-) 16# 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 $with_cross_host. 19# 20# Do not delete or change the following two lines. For why, see 21# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html 22AC_CANONICAL_SYSTEM 23ACX_NONCANONICAL_TARGET 24 25AM_ENABLE_MULTILIB(, ..) 26 27target_alias=${target_alias-$host_alias} 28AC_SUBST(target_alias) 29 30AM_INIT_AUTOMAKE([1.9.0 foreign subdir-objects no-dist -Wall -Wno-override -Werror]) 31 32AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 33AC_ARG_ENABLE(version-specific-runtime-libs, 34AS_HELP_STRING([--enable-version-specific-runtime-libs], 35 [specify that runtime libraries should be installed in a compiler-specific directory]), 36[case "$enableval" in 37 yes) version_specific_libs=yes ;; 38 no) version_specific_libs=no ;; 39 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 40 esac], 41[version_specific_libs=no]) 42AC_MSG_RESULT($version_specific_libs) 43 44GCC_NO_EXECUTABLES 45 46AC_USE_SYSTEM_EXTENSIONS 47 48# See if makeinfo has been installed and is modern enough 49# that we can use it. 50ACX_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]*]) 53AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") 54 55ACX_BUGURL([https://gcc.gnu.org/bugs/]) 56 57# Configure libtool 58AM_PROG_LIBTOOL 59ACX_LT_HOST_FLAGS 60AC_SUBST(enable_shared) 61AC_SUBST(enable_static) 62 63AM_MAINTAINER_MODE 64 65AC_LANG_C 66# The same as in boehm-gc and libstdc++. Have to borrow it from there. 67# We must force CC to /not/ be precious variables; otherwise 68# the wrong, non-multilib-adjusted value will be used in multilibs. 69# As a side effect, we have to subst CFLAGS ourselves. 70 71m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 72m4_define([_AC_ARG_VAR_PRECIOUS],[]) 73AC_PROG_CC 74m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 75 76AC_SUBST(CFLAGS) 77 78AM_PROG_CC_C_O 79 80if test "x$GCC" != "xyes"; then 81 AC_MSG_ERROR([libquadmath must be built with GCC]) 82fi 83AC_PROG_CPP 84 85GCC_WITH_TOOLEXECLIBDIR 86 87# Calculate toolexeclibdir 88# Also toolexecdir, though it's only used in toolexeclibdir 89case ${version_specific_libs} in 90 yes) 91 # Need the gcc compiler version to know where to install libraries 92 # and header files if --enable-version-specific-runtime-libs option 93 # is selected. 94 toolexecdir='$(libdir)/gcc/$(target_alias)' 95 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' 96 ;; 97 no) 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 ${with_toolexeclibdir} in 103 no) 104 toolexeclibdir='$(toolexecdir)/lib' 105 ;; 106 *) 107 toolexeclibdir=${with_toolexeclibdir} 108 ;; 109 esac 110 else 111 toolexecdir='$(libdir)/gcc-lib/$(target_alias)' 112 toolexeclibdir='$(libdir)' 113 fi 114 multi_os_directory=`$CC -print-multi-os-directory` 115 case $multi_os_directory in 116 .) ;; # Avoid trailing /. 117 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; 118 esac 119 ;; 120esac 121AC_SUBST(toolexecdir) 122AC_SUBST(toolexeclibdir) 123 124AC_CHECK_HEADERS(fenv.h langinfo.h locale.h wchar.h wctype.h limits.h ctype.h printf.h errno.h) 125LIBQUAD_CHECK_MATH_H_SIGNGAM 126 127# If available, sqrtl and cbrtl speed up the calculation - 128# but they are not required 129if test x$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) 138else 139 if test "x$ac_cv_lib_m_sqrtl" = x""yes; then 140 AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl]) 141 fi 142 if test "x$ac_cv_lib_m_cbrtl" = x""yes; then 143 AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl]) 144 fi 145 if test "x$ac_cv_lib_m_feholdexcept" = x""yes; then 146 AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept]) 147 fi 148 if test "x$ac_cv_lib_m_fesetround" = x""yes; then 149 AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround]) 150 fi 151 if test "x$ac_cv_lib_m_feupdateenv" = x""yes; then 152 AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv]) 153 fi 154 if test "x$ac_cv_lib_m_fesetenv" = x""yes; then 155 AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv]) 156 fi 157 if test "x$ac_cv_lib_m_fetestexcept" = x""yes; then 158 AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept]) 159 fi 160fi 161 162# Check for hidden visibility (copied from libssp). 163saved_CFLAGS="$CFLAGS" 164CFLAGS="$CFLAGS -Werror" 165AC_MSG_CHECKING([whether hidden visibility is supported]) 166AC_TRY_COMPILE([ 167void __attribute__((visibility ("hidden"))) bar (void) {}],, 168[quadmath_hidden=yes],[quadmath_hidden=no]) 169AC_MSG_RESULT($quadmath_hidden) 170if test x$quadmath_hidden = xyes; then 171 AC_DEFINE([HAVE_HIDDEN_VISIBILITY],[1],[__attribute__((visibility ("hidden"))) supported]) 172fi 173CFLAGS="$saved_CFLAGS" 174 175# Check for symbol versioning (copied from libssp). 176AC_MSG_CHECKING([whether symbol versioning is supported]) 177AC_ARG_ENABLE(symvers, 178AS_HELP_STRING([--disable-symvers], 179 [disable symbol versioning for libquadmath]), 180quadmath_use_symver=$enableval, 181quadmath_use_symver=yes) 182if test "x$quadmath_use_symver" != xno; then 183 if test x$gcc_no_link = xyes; then 184 # If we cannot link, we cannot build shared libraries, so do not use 185 # symbol versioning. 186 quadmath_use_symver=no 187 else 188 save_LDFLAGS="$LDFLAGS" 189 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map" 190 cat > conftest.map <<EOF 191FOO_1.0 { 192 global: *foo*; bar; local: *; 193}; 194EOF 195 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=gnu],[quadmath_use_symver=no]) 196 if test x$quadmath_use_symver = xno; then 197 case "$target_os" in 198 solaris2*) 199 LDFLAGS="$save_LDFLAGS" 200 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map" 201 # Sun ld cannot handle wildcards and treats all entries as undefined. 202 cat > conftest.map <<EOF 203FOO_1.0 { 204 global: foo; local: *; 205}; 206EOF 207 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=sun],[quadmath_use_symver=no]) 208 ;; 209 esac 210 fi 211 LDFLAGS="$save_LDFLAGS" 212 fi 213fi 214AC_MSG_RESULT($quadmath_use_symver) 215AM_CONDITIONAL(LIBQUAD_USE_SYMVER, [test "x$quadmath_use_symver" != xno]) 216AM_CONDITIONAL(LIBQUAD_USE_SYMVER_GNU, [test "x$quadmath_use_symver" = xgnu]) 217AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun]) 218 219AC_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; 223 #else 224 typedef _Complex float __attribute__((mode(KC))) __complex128; 225 #endif 226 227 __float128 foo (__float128 x) 228 { 229 230 __complex128 z1, z2; 231 232 z1 = x; 233 z2 = x / 7.Q; 234 z2 /= z1; 235 236 return (__float128) z2; 237 } 238 239 __float128 bar (__float128 x) 240 { 241 return x * __builtin_huge_valq (); 242 } 243 ],[ 244 foo (1.2Q); 245 bar (1.2Q); 246 ],[ 247 libquad_cv_have_float128=yes 248 ],[ 249 libquad_cv_have_float128=no 250])]) 251AM_CONDITIONAL(BUILD_LIBQUADMATH, [test "x$libquad_cv_have_float128" = xyes]) 252 253# Check for printf hook support. 254AC_MSG_CHECKING([whether printf hooks are supported]) 255AC_TRY_COMPILE([ 256#include <printf.h> 257#include <stdarg.h> 258#include <stdlib.h> 259extern void flt128_va (void *, va_list *); 260extern int flt128_ais (const struct printf_info *, size_t, int *, int *); 261extern int flt128_printf_fp (FILE *, const struct printf_info *, const void *const *); 262],[ 263int pa_flt128 = register_printf_type (flt128_va); 264int mod_Q = register_printf_modifier (L"Q"); 265int res = register_printf_specifier ('f', flt128_printf_fp, flt128_ais); 266struct printf_info info = { .user = -1 }; 267], 268[quadmath_printf_hooks=yes],[quadmath_printf_hooks=no]) 269AC_MSG_RESULT($quadmath_printf_hooks) 270if test x$quadmath_printf_hooks = xyes; then 271 AC_DEFINE([HAVE_PRINTF_HOOKS],[1],[GNU C Library stype printf hooks supported]) 272fi 273 274# Check for whether locale support for quadmath_snprintf or Q printf hooks 275# should be provided. 276AC_MSG_CHECKING([whether nl_langinfo should be used]) 277AC_TRY_COMPILE([#include <langinfo.h>],[ 278const char *s; 279s = nl_langinfo (DECIMAL_POINT); 280s = nl_langinfo (MON_DECIMAL_POINT); 281s = nl_langinfo (GROUPING); 282s = nl_langinfo (MON_GROUPING); 283s = nl_langinfo (THOUSANDS_SEP); 284s = nl_langinfo (MON_THOUSANDS_SEP); 285(void) s; 286], 287[quadmath_use_nl_langinfo=yes],[quadmath_use_nl_langinfo=no]) 288AC_MSG_RESULT($quadmath_use_nl_langinfo) 289if test x$quadmath_use_nl_langinfo = xyes; then 290 AC_DEFINE([USE_NL_LANGINFO],[1],[whether nl_langinfo should be used]) 291fi 292 293AC_MSG_CHECKING([whether nl_langinfo should be used for wide char locale info]) 294AC_TRY_COMPILE([#include <langinfo.h>],[ 295const char *s; 296s = nl_langinfo (_NL_NUMERIC_DECIMAL_POINT_WC); 297s = nl_langinfo (_NL_MONETARY_DECIMAL_POINT_WC); 298s = nl_langinfo (_NL_NUMERIC_THOUSANDS_SEP_WC); 299s = nl_langinfo (_NL_MONETARY_THOUSANDS_SEP_WC); 300(void) s; 301], 302[quadmath_use_nl_langinfo_wc=yes],[quadmath_use_nl_langinfo_wc=no]) 303AC_MSG_RESULT($quadmath_use_nl_langinfo_wc) 304if test x$quadmath_use_nl_langinfo_wc = xyes; then 305 AC_DEFINE([USE_NL_LANGINFO_WC],[1],[whether nl_langinfo should be used for wide char locale info]) 306fi 307 308AC_MSG_CHECKING([whether localeconv should be used]) 309AC_TRY_COMPILE([#include <locale.h>],[ 310const struct lconv *l = localeconv (); 311const char *s; 312s = l->decimal_point; 313s = l->mon_decimal_point; 314s = l->grouping; 315s = l->mon_grouping; 316s = l->thousands_sep; 317s = l->mon_thousands_sep; 318(void) s; 319], 320[quadmath_use_localeconv=yes],[quadmath_use_localeconv=no]) 321AC_MSG_RESULT($quadmath_use_localeconv) 322if test x$quadmath_use_localeconv = xyes; then 323 AC_DEFINE([USE_LOCALECONV],[1],[whether localeconv should be used]) 324fi 325 326# Check for whether i18n number rewriting support for quadmath_snprintf 327# or Q printf hooks should be provided. 328AC_MSG_CHECKING([whether i18n number rewriting support for quadmath_snprintf should be added]) 329AC_TRY_COMPILE([#include <langinfo.h> 330#include <limits.h> 331#include <string.h> 332#include <wchar.h> 333#include <wctype.h>],[ 334const char *s; 335char decimal[MB_LEN_MAX]; 336wctrans_t map = wctrans ("to_outpunct"); 337wint_t wdecimal = towctrans (L'.', map); 338mbstate_t state; 339memset (&state, '\0', sizeof (state)); 340wcrtomb (decimal, wdecimal, &state); 341s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_MB); 342s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_WC); 343s = nl_langinfo (_NL_CTYPE_MB_CUR_MAX); 344(void) s; 345], 346[quadmath_use_i18n_number_h=yes],[quadmath_use_i18n_number_h=no]) 347AC_MSG_RESULT($quadmath_use_i18n_number_h) 348if test x$quadmath_use_i18n_number_h = xyes; then 349 AC_DEFINE([USE_I18N_NUMBER_H],[1],[whether i18n number rewriting can be supported]) 350fi 351 352# Add CET specific flags if CET is enabled 353GCC_CET_FLAGS(CET_FLAGS) 354XCFLAGS="$XCFLAGS $CET_FLAGS" 355AC_SUBST(XCFLAGS) 356 357AC_CACHE_SAVE 358 359if test ${multilib} = yes; then 360 multilib_arg="--enable-multilib" 361else 362 multilib_arg= 363fi 364 365 366# We would like our source tree to be readonly. However when releases or 367# pre-releases are generated, the flex/bison generated files as well as the 368# various formats of manuals need to be included along with the rest of the 369# sources. Therefore we have --enable-generated-files-in-srcdir to do 370# just that. 371AC_MSG_CHECKING(generated-files-in-srcdir) 372AC_ARG_ENABLE(generated-files-in-srcdir, 373AS_HELP_STRING([--enable-generated-files-in-srcdir], 374 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]), 375[case "$enableval" in 376 yes) enable_generated_files_in_srcdir=yes ;; 377 no) enable_generated_files_in_srcdir=no ;; 378 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 379 esac], 380[enable_generated_files_in_srcdir=no]) 381AC_MSG_RESULT($enable_generated_files_in_srcdir) 382AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) 383 384# Determine what GCC version number to use in filesystem paths. 385GCC_BASE_VER 386 387AC_CONFIG_FILES(Makefile) 388AC_OUTPUT 389