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 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 #if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__) 213 typedef _Complex float __attribute__((mode(TC))) __complex128; 214 #else 215 typedef _Complex float __attribute__((mode(KC))) __complex128; 216 #endif 217 218 __float128 foo (__float128 x) 219 { 220 221 __complex128 z1, z2; 222 223 z1 = x; 224 z2 = x / 7.Q; 225 z2 /= z1; 226 227 return (__float128) z2; 228 } 229 230 __float128 bar (__float128 x) 231 { 232 return x * __builtin_huge_valq (); 233 } 234 ],[ 235 foo (1.2Q); 236 bar (1.2Q); 237 ],[ 238 libquad_cv_have_float128=yes 239 ],[ 240 libquad_cv_have_float128=no 241])]) 242AM_CONDITIONAL(BUILD_LIBQUADMATH, [test "x$libquad_cv_have_float128" = xyes]) 243 244# Check for printf hook support. 245AC_MSG_CHECKING([whether printf hooks are supported]) 246AC_TRY_COMPILE([ 247#include <printf.h> 248#include <stdarg.h> 249#include <stdlib.h> 250extern void flt128_va (void *, va_list *); 251extern int flt128_ais (const struct printf_info *, size_t, int *, int *); 252extern int flt128_printf_fp (FILE *, const struct printf_info *, const void *const *); 253],[ 254int pa_flt128 = register_printf_type (flt128_va); 255int mod_Q = register_printf_modifier (L"Q"); 256int res = register_printf_specifier ('f', flt128_printf_fp, flt128_ais); 257struct printf_info info = { .user = -1 }; 258], 259[quadmath_printf_hooks=yes],[quadmath_printf_hooks=no]) 260AC_MSG_RESULT($quadmath_printf_hooks) 261if test x$quadmath_printf_hooks = xyes; then 262 AC_DEFINE([HAVE_PRINTF_HOOKS],[1],[GNU C Library stype printf hooks supported]) 263fi 264 265# Check for whether locale support for quadmath_snprintf or Q printf hooks 266# should be provided. 267AC_MSG_CHECKING([whether nl_langinfo should be used]) 268AC_TRY_COMPILE([#include <langinfo.h>],[ 269const char *s; 270s = nl_langinfo (DECIMAL_POINT); 271s = nl_langinfo (MON_DECIMAL_POINT); 272s = nl_langinfo (GROUPING); 273s = nl_langinfo (MON_GROUPING); 274s = nl_langinfo (THOUSANDS_SEP); 275s = nl_langinfo (MON_THOUSANDS_SEP); 276(void) s; 277], 278[quadmath_use_nl_langinfo=yes],[quadmath_use_nl_langinfo=no]) 279AC_MSG_RESULT($quadmath_use_nl_langinfo) 280if test x$quadmath_use_nl_langinfo = xyes; then 281 AC_DEFINE([USE_NL_LANGINFO],[1],[whether nl_langinfo should be used]) 282fi 283 284AC_MSG_CHECKING([whether nl_langinfo should be used for wide char locale info]) 285AC_TRY_COMPILE([#include <langinfo.h>],[ 286const char *s; 287s = nl_langinfo (_NL_NUMERIC_DECIMAL_POINT_WC); 288s = nl_langinfo (_NL_MONETARY_DECIMAL_POINT_WC); 289s = nl_langinfo (_NL_NUMERIC_THOUSANDS_SEP_WC); 290s = nl_langinfo (_NL_MONETARY_THOUSANDS_SEP_WC); 291(void) s; 292], 293[quadmath_use_nl_langinfo_wc=yes],[quadmath_use_nl_langinfo_wc=no]) 294AC_MSG_RESULT($quadmath_use_nl_langinfo_wc) 295if test x$quadmath_use_nl_langinfo_wc = xyes; then 296 AC_DEFINE([USE_NL_LANGINFO_WC],[1],[whether nl_langinfo should be used for wide char locale info]) 297fi 298 299AC_MSG_CHECKING([whether localeconv should be used]) 300AC_TRY_COMPILE([#include <locale.h>],[ 301const struct lconv *l = localeconv (); 302const char *s; 303s = l->decimal_point; 304s = l->mon_decimal_point; 305s = l->grouping; 306s = l->mon_grouping; 307s = l->thousands_sep; 308s = l->mon_thousands_sep; 309(void) s; 310], 311[quadmath_use_localeconv=yes],[quadmath_use_localeconv=no]) 312AC_MSG_RESULT($quadmath_use_localeconv) 313if test x$quadmath_use_localeconv = xyes; then 314 AC_DEFINE([USE_LOCALECONV],[1],[whether localeconv should be used]) 315fi 316 317# Check for whether i18n number rewriting support for quadmath_snprintf 318# or Q printf hooks should be provided. 319AC_MSG_CHECKING([whether i18n number rewriting support for quadmath_snprintf should be added]) 320AC_TRY_COMPILE([#include <langinfo.h> 321#include <limits.h> 322#include <string.h> 323#include <wchar.h> 324#include <wctype.h>],[ 325const char *s; 326char decimal[MB_LEN_MAX]; 327wctrans_t map = wctrans ("to_outpunct"); 328wint_t wdecimal = towctrans (L'.', map); 329mbstate_t state; 330memset (&state, '\0', sizeof (state)); 331wcrtomb (decimal, wdecimal, &state); 332s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_MB); 333s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_WC); 334s = nl_langinfo (_NL_CTYPE_MB_CUR_MAX); 335(void) s; 336], 337[quadmath_use_i18n_number_h=yes],[quadmath_use_i18n_number_h=no]) 338AC_MSG_RESULT($quadmath_use_i18n_number_h) 339if test x$quadmath_use_i18n_number_h = xyes; then 340 AC_DEFINE([USE_I18N_NUMBER_H],[1],[whether i18n number rewriting can be supported]) 341fi 342 343# Add CET specific flags if CET is enabled 344GCC_CET_FLAGS(CET_FLAGS) 345XCFLAGS="$XCFLAGS $CET_FLAGS" 346AC_SUBST(XCFLAGS) 347 348AC_CACHE_SAVE 349 350if test ${multilib} = yes; then 351 multilib_arg="--enable-multilib" 352else 353 multilib_arg= 354fi 355 356 357# We would like our source tree to be readonly. However when releases or 358# pre-releases are generated, the flex/bison generated files as well as the 359# various formats of manuals need to be included along with the rest of the 360# sources. Therefore we have --enable-generated-files-in-srcdir to do 361# just that. 362AC_MSG_CHECKING(generated-files-in-srcdir) 363AC_ARG_ENABLE(generated-files-in-srcdir, 364AS_HELP_STRING([--enable-generated-files-in-srcdir], 365 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]), 366[case "$enableval" in 367 yes) enable_generated_files_in_srcdir=yes ;; 368 no) enable_generated_files_in_srcdir=no ;; 369 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 370 esac], 371[enable_generated_files_in_srcdir=no]) 372AC_MSG_RESULT($enable_generated_files_in_srcdir) 373AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) 374 375# Determine what GCC version number to use in filesystem paths. 376GCC_BASE_VER 377 378AC_CONFIG_FILES(Makefile) 379AC_OUTPUT 380