1# configure.ac -- Go library configure script. 2 3# Copyright 2009 The Go Authors. All rights reserved. 4# Use of this source code is governed by a BSD-style 5# license that can be found in the LICENSE file. 6 7# Process this file with autoreconf to produce configure. 8 9AC_PREREQ(2.64) 10AC_INIT(package-unused, version-unused,, libgo) 11AC_CONFIG_SRCDIR(Makefile.am) 12AC_CONFIG_HEADER(config.h) 13 14libtool_VERSION=4:0:0 15AC_SUBST(libtool_VERSION) 16 17AM_ENABLE_MULTILIB(, ..) 18 19AC_CANONICAL_SYSTEM 20target_alias=${target_alias-$host_alias} 21 22AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dist -Wall -Wno-portability]) 23AH_TEMPLATE(PACKAGE, [Name of package]) 24AH_TEMPLATE(VERSION, [Version number of package]) 25 26m4_rename([_AC_ARG_VAR_PRECIOUS],[glibgo_PRECIOUS]) 27m4_define([_AC_ARG_VAR_PRECIOUS],[]) 28AC_PROG_CC 29AC_PROG_GO 30m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 31 32AC_SUBST(CFLAGS) 33 34AM_MAINTAINER_MODE 35 36AC_PROG_LD 37AC_PROG_RANLIB 38AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy) 39 40AC_LIBTOOL_DLOPEN 41AM_PROG_LIBTOOL 42AC_SUBST(enable_shared) 43AC_SUBST(enable_static) 44 45CC_FOR_BUILD=${CC_FOR_BUILD:-gcc} 46AC_SUBST(CC_FOR_BUILD) 47 48AC_PROG_AWK 49 50WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual' 51AC_SUBST(WARN_FLAGS) 52 53AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror], 54 [turns on -Werror @<:@default=yes@:>@])]) 55if test "x$enable_werror" != "xno"; then 56 WERROR="-Werror" 57fi 58AC_SUBST(WERROR) 59 60glibgo_toolexecdir=no 61glibgo_toolexeclibdir=no 62 63AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 64AC_ARG_ENABLE([version-specific-runtime-libs], 65 AC_HELP_STRING([--enable-version-specific-runtime-libs], 66 [Specify that runtime libraries should be installed in a compiler-specific directory]), 67 [case "$enableval" in 68 yes) version_specific_libs=yes ;; 69 no) version_specific_libs=no ;; 70 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 71 esac], 72 [version_specific_libs=no]) 73AC_MSG_RESULT($version_specific_libs) 74 75# Version-specific runtime libs processing. 76if test $version_specific_libs = yes; then 77 glibgo_toolexecdir='${libdir}/gcc/${host_alias}' 78 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)' 79fi 80 81# Calculate glibgo_toolexecdir, glibgo_toolexeclibdir 82# Install a library built with a cross compiler in tooldir, not libdir. 83if test -n "$with_cross_host" && 84 test x"$with_cross_host" != x"no"; then 85 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}' 86 nover_glibgo_toolexeclibdir='${toolexecdir}/lib' 87else 88 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}' 89 nover_glibgo_toolexeclibdir='${libdir}' 90fi 91multi_os_directory=`$CC -print-multi-os-directory` 92case $multi_os_directory in 93 .) ;; # Avoid trailing /. 94 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;; 95esac 96 97if test x"$glibgo_toolexecdir" = x"no"; then 98 glibgo_toolexecdir="${nover_glibgo_toolexecdir}" 99 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}" 100fi 101 102AC_SUBST(glibgo_toolexecdir) 103AC_SUBST(glibgo_toolexeclibdir) 104AC_SUBST(nover_glibgo_toolexeclibdir) 105 106# See if the user wants to configure without libffi. Some 107# architectures don't support it. FIXME: We should set a default 108# based on the host. 109AC_ARG_WITH(libffi, 110 AS_HELP_STRING([--without-libffi], 111 [don't use libffi]), 112 [:], 113 [with_libffi=${with_libffi_default-yes}]) 114 115LIBFFI= 116LIBFFIINCS= 117if test "$with_libffi" != no; then 118 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.]) 119 LIBFFI=../libffi/libffi_convenience.la 120 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include' 121fi 122AC_SUBST(LIBFFI) 123AC_SUBST(LIBFFIINCS) 124 125# Used to tell GNU make to include a file without telling automake to 126# include it. 127go_include="-include" 128AC_SUBST(go_include) 129 130is_darwin=no 131is_freebsd=no 132is_irix=no 133is_linux=no 134is_netbsd=no 135is_openbsd=no 136is_rtems=no 137is_solaris=no 138GOOS=unknown 139case ${host} in 140 *-*-darwin*) is_darwin=yes; GOOS=darwin ;; 141 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;; 142 *-*-irix6*) is_irix=yes; GOOS=irix ;; 143 *-*-linux*) is_linux=yes; GOOS=linux ;; 144 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;; 145 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;; 146 *-*-rtems*) is_rtems=yes; GOOS=rtems ;; 147 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;; 148esac 149AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes) 150AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes) 151AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes) 152AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes) 153AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes) 154AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes) 155AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes) 156AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes) 157AC_SUBST(GOOS) 158 159dnl Test whether we need to use DejaGNU or whether we can use the 160dnl simpler gotest approach. We can only use gotest for a native 161dnl build. 162USE_DEJAGNU=no 163case ${host} in 164 *-*-rtems*) USE_DEJAGNU=yes ;; 165 ${build}) ;; 166 *) USE_DEJAGNU=yes ;; 167esac 168AC_SUBST(USE_DEJAGNU) 169 170dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch). 171is_386=no 172is_alpha=no 173is_arm=no 174is_m68k=no 175mips_abi=unknown 176is_ppc=no 177is_ppc64=no 178is_sparc=no 179is_sparc64=no 180is_x86_64=no 181GOARCH=unknown 182case ${host} in 183 alpha*-*-*) 184 is_alpha=yes 185 GOARCH=alpha 186 ;; 187 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*) 188 is_arm=yes 189 GOARCH=arm 190 ;; 191changequote(,)dnl 192 i[34567]86-*-* | x86_64-*-*) 193changequote([,])dnl 194 AC_COMPILE_IFELSE([ 195#ifdef __x86_64__ 196#error 64-bit 197#endif], 198[is_386=yes], [is_x86_64=yes]) 199 if test "$is_386" = "yes"; then 200 GOARCH=386 201 else 202 GOARCH=amd64 203 fi 204 ;; 205 m68k*-*-*) 206 is_m68k=yes 207 GOARCH=m68k 208 ;; 209 mips*-*-*) 210 AC_COMPILE_IFELSE([ 211#if _MIPS_SIM != _ABIO32 212#error not o32 213#endif], 214[mips_abi="o32"], 215 [AC_COMPILE_IFELSE([ 216#if _MIPS_SIM != _ABIN32 217#error not n32 218#endif], 219[mips_abi="n32"], 220 [AC_COMPILE_IFELSE([ 221#if _MIPS_SIM != _ABI64 222#error not n64 223#endif], 224[mips_abi="n64"], 225 [AC_COMPILE_IFELSE([ 226#if _MIPS_SIM != _ABIO64 227#error not o64 228#endif], 229[mips_abi="o64"], 230 [AC_MSG_ERROR([unknown MIPS ABI]) 231[mips_abi="n32"]])])])]) 232 case "$mips_abi" in 233 "o32") GOARCH=mipso32 ;; 234 "n32") GOARCH=mipsn32 ;; 235 "n64") GOARCH=mipsn64 ;; 236 "o64") GOARCH=mipso64 ;; 237 esac 238 ;; 239 rs6000*-*-* | powerpc*-*-*) 240 AC_COMPILE_IFELSE([ 241#ifdef _ARCH_PPC64 242#error 64-bit 243#endif], 244[is_ppc=yes], [is_ppc64=yes]) 245 if test "$is_ppc" = "yes"; then 246 GOARCH=ppc 247 else 248 GOARCH=ppc64 249 fi 250 ;; 251 sparc*-*-*) 252 AC_COMPILE_IFELSE([ 253#if defined(__sparcv9) || defined(__arch64__) 254#error 64-bit 255#endif], 256[is_sparc=yes], [is_sparc64=yes]) 257 if test "$is_sparc" = "yes"; then 258 GOARCH=sparc 259 else 260 GOARCH=sparc64 261 fi 262 ;; 263esac 264AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes) 265AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes) 266AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes) 267AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes) 268AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown) 269AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32) 270AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32) 271AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64) 272AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64) 273AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes) 274AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes) 275AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes) 276AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes) 277AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes) 278AC_SUBST(GOARCH) 279 280dnl Some files are only present when needed for specific architectures. 281GO_LIBCALL_OS_FILE= 282GO_LIBCALL_OS_ARCH_FILE= 283GO_SYSCALL_OS_FILE= 284GO_SYSCALL_OS_ARCH_FILE= 285if test -f ${srcdir}/go/syscall/libcall_${GOOS}.go; then 286 GO_LIBCALL_OS_FILE=go/syscall/libcall_${GOOS}.go 287fi 288if test -f ${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go; then 289 GO_LIBCALL_OS_ARCH_FILE=go/syscall/libcall_${GOOS}_${GOARCH}.go 290fi 291if test -f ${srcdir}/go/syscall/syscall_${GOOS}.go; then 292 GO_SYSCALL_OS_FILE=go/syscall/syscall_${GOOS}.go 293fi 294if test -f ${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go; then 295 GO_SYSCALL_OS_ARCH_FILE=go/syscall/syscall_${GOOS}_${GOARCH}.go 296fi 297AC_SUBST(GO_LIBCALL_OS_FILE) 298AC_SUBST(GO_LIBCALL_OS_ARCH_FILE) 299AC_SUBST(GO_SYSCALL_OS_FILE) 300AC_SUBST(GO_SYSCALL_OS_ARCH_FILE) 301 302dnl Special flags used to generate sysinfo.go. 303OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" 304case "$target" in 305 mips-sgi-irix6.5*) 306 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct 307 # msghdr in <sys/socket.h>. 308 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500" 309 ;; 310 *-*-solaris2.[[89]]) 311 # Solaris 8/9 need this so struct msghdr gets the msg_control 312 # etc. fields in <sys/socket.h> (_XPG4_2). 313 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__" 314 ;; 315 *-*-solaris2.1[[01]]) 316 # Solaris 10+ needs this so struct msghdr gets the msg_control 317 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as 318 # above doesn't work with C99. 319 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__" 320 ;; 321esac 322AC_SUBST(OSCFLAGS) 323 324dnl Use -fsplit-stack when compiling C code if available. 325AC_CACHE_CHECK([whether -fsplit-stack is supported], 326[libgo_cv_c_split_stack_supported], 327[CFLAGS_hold=$CFLAGS 328CFLAGS="$CFLAGS -fsplit-stack" 329AC_COMPILE_IFELSE([[int i;]], 330[libgo_cv_c_split_stack_supported=yes], 331[libgo_cv_c_split_stack_supported=no]) 332CFLAGS=$CFLAGS_hold]) 333if test "$libgo_cv_c_split_stack_supported" = yes; then 334 SPLIT_STACK=-fsplit-stack 335 AC_DEFINE(USING_SPLIT_STACK, 1, 336 [Define if the compiler supports -fsplit-stack]) 337else 338 SPLIT_STACK= 339fi 340AC_SUBST(SPLIT_STACK) 341AM_CONDITIONAL(USING_SPLIT_STACK, 342 test "$libgo_cv_c_split_stack_supported" = yes) 343 344dnl Check whether the linker does stack munging when calling from 345dnl split-stack into non-split-stack code. We check this by looking 346dnl at the --help output. FIXME: This is only half right: it's 347dnl possible for the linker to support this for some targets but not 348dnl others. 349AC_CACHE_CHECK([whether linker supports split stack], 350[libgo_cv_c_linker_supports_split_stack], 351libgo_cv_c_linker_supports_split_stack=no 352if $LD --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then 353 libgo_cv_c_linker_supports_split_stack=yes 354fi) 355if test "$libgo_cv_c_linker_supports_split_stack" = yes; then 356 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1, 357 [Define if the linker support split stack adjustments]) 358fi 359 360dnl Test for the -lm library. 361MATH_LIBS= 362AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm) 363AC_SUBST(MATH_LIBS) 364 365dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac. 366AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets, 367 [libgo_cv_lib_sockets= 368 libgo_check_both=no 369 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes) 370 if test "$libgo_check_socket" = "yes"; then 371 unset ac_cv_func_connect 372 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket", 373 libgo_check_both=yes) 374 fi 375 if test "$libgo_check_both" = "yes"; then 376 libgo_old_libs=$LIBS 377 LIBS="$LIBS -lsocket -lnsl" 378 unset ac_cv_func_accept 379 AC_CHECK_FUNC(accept, 380 [libgo_check_nsl=no 381 libgo_cv_lib_sockets="-lsocket -lnsl"]) 382 unset ac_cv_func_accept 383 LIBS=$libgo_old_libs 384 fi 385 unset ac_cv_func_gethostbyname 386 libgo_old_libs="$LIBS" 387 AC_CHECK_FUNC(gethostbyname, , 388 [AC_CHECK_LIB(nsl, main, 389 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])]) 390 unset ac_cv_func_gethostbyname 391 LIBS=$libgo_old_libs 392]) 393NET_LIBS="$libgo_cv_lib_sockets" 394AC_SUBST(NET_LIBS) 395 396dnl Test whether the compiler supports the -pthread option. 397AC_CACHE_CHECK([whether -pthread is supported], 398[libgo_cv_lib_pthread], 399[CFLAGS_hold=$CFLAGS 400CFLAGS="$CFLAGS -pthread" 401AC_COMPILE_IFELSE([[int i;]], 402[libgo_cv_lib_pthread=yes], 403[libgo_cv_lib_pthread=no]) 404CFLAGS=$CFLAGS_hold]) 405PTHREAD_CFLAGS= 406if test "$libgo_cv_lib_pthread" = yes; then 407 PTHREAD_CFLAGS=-pthread 408fi 409AC_SUBST(PTHREAD_CFLAGS) 410 411dnl Test for the -lpthread library. 412PTHREAD_LIBS= 413AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread) 414AC_SUBST(PTHREAD_LIBS) 415 416dnl Test if -lrt is required for sched_yield and/or nanosleep. 417AC_SEARCH_LIBS([sched_yield], [rt]) 418AC_SEARCH_LIBS([nanosleep], [rt]) 419 420AC_C_BIGENDIAN 421 422GCC_CHECK_UNWIND_GETIPINFO 423 424AC_ARG_ENABLE(sjlj-exceptions, 425 AC_HELP_STRING([--enable-sjlj-exceptions], 426 [force use of builtin_setjmp for exceptions]), 427 [case "$enableval" in 428 yes|no|auto) ;; 429 *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;; 430 esac], 431 [enable_sjlj_exceptions=auto]) 432 433AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions], 434[libgo_cv_lib_sjlj_exceptions], 435[AC_LANG_CONFTEST( 436 [AC_LANG_SOURCE([ 437void bar (); 438void clean (int *); 439void foo () 440{ 441 int i __attribute__ ((cleanup (clean))); 442 bar(); 443} 444])]) 445CFLAGS_hold=$CFLAGS 446CFLAGS="--save-temps -fexceptions" 447libgo_cv_lib_sjlj_exceptions=unknown 448AS_IF([ac_fn_c_try_compile], 449 [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then 450 libgo_cv_lib_sjlj_exceptions=yes 451 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then 452 libgo_cv_lib_sjlj_exceptions=no 453 fi]) 454CFLAGS=$CFLAGS_hold 455rm -f conftest* 456]) 457 458if test "$enable_sjlj_exceptions" = "auto"; then 459 enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions 460fi 461 462case $enable_sjlj_exceptions in 463yes) 464 AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1, 465 [Define if the C++ compiler is configured for setjmp/longjmp exceptions.]) 466 ;; 467no) 468 ;; 469*) 470 AC_MSG_ERROR([unable to detect exception model]) 471 ;; 472esac 473 474AC_CHECK_HEADERS(sys/file.h sys/mman.h syscall.h sys/epoll.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/reboot.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h) 475 476AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [], 477[#ifdef HAVE_SYS_SOCKET_H 478#include <sys/socket.h> 479#endif 480]) 481 482AC_CACHE_CHECK([whether <ustat.h> can be used], 483[libgo_cv_c_ustat_h], 484[CFLAGS_hold=$CFLAGS 485CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS" 486AC_COMPILE_IFELSE( 487[AC_LANG_SOURCE([ 488#include <sys/types.h> 489#ifdef HAVE_LINUX_FILTER_H 490#include <linux/filter.h> 491#endif 492#include <ustat.h> 493])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no]) 494CFLAGS=$CFLAGS_hold]) 495if test $libgo_cv_c_ustat_h = yes; then 496 AC_DEFINE(HAVE_USTAT_H, 1, 497 [Define to 1 if you have the <ustat.h> header file and it works.]) 498fi 499 500AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes) 501 502AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv dl_iterate_phdr) 503AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes) 504AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes) 505 506AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat openat pipe2 removexattr renameat setxattr sync_file_range splice tee unlinkat unshare utimensat) 507AC_TYPE_OFF_T 508AC_CHECK_TYPES([loff_t]) 509 510LIBS_hold="$LIBS" 511LIBS="$LIBS -lm" 512AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl) 513LIBS="$LIBS_hold" 514 515CFLAGS_hold="$CFLAGS" 516CFLAGS="$CFLAGS $PTHREAD_CFLAGS" 517LIBS_hold="$LIBS" 518LIBS="$LIBS $PTHREAD_LIBS" 519AC_CHECK_FUNCS(sem_timedwait) 520CFLAGS="$CFLAGS_hold" 521LIBS="$LIBS_hold" 522 523LIBS_hold="$LIBS" 524LIBS="$LIBS $MATH_LIBS" 525AC_CHECK_FUNCS(matherr) 526LIBS="$LIBS_hold" 527 528AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4], 529[libgo_cv_func___sync_bool_compare_and_swap_4], 530[AC_LINK_IFELSE([ 531typedef unsigned int uint32 __attribute__ ((mode (SI))); 532uint32 i; 533int main() { return __sync_bool_compare_and_swap (&i, 0, 1); } 534], 535[libgo_cv_func___sync_bool_compare_and_swap_4=yes], 536[libgo_cv_func___sync_bool_compare_and_swap_4=no])]) 537if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then 538 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1, 539 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32]) 540fi 541 542AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8], 543[libgo_cv_func___sync_bool_compare_and_swap_8], 544[AC_LINK_IFELSE([ 545typedef unsigned int uint64 __attribute__ ((mode (DI))); 546uint64 i; 547int main() { return __sync_bool_compare_and_swap (&i, 0, 1); } 548], 549[libgo_cv_func___sync_bool_compare_and_swap_8=yes], 550[libgo_cv_func___sync_bool_compare_and_swap_8=no])]) 551if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then 552 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1, 553 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64]) 554fi 555 556AC_CACHE_CHECK([for __sync_fetch_and_add_4], 557[libgo_cv_func___sync_fetch_and_add_4], 558[AC_LINK_IFELSE([ 559typedef unsigned int uint32 __attribute__ ((mode (SI))); 560uint32 i; 561int main() { return __sync_fetch_and_add (&i, 1); } 562], 563[libgo_cv_func___sync_fetch_and_add_4=yes], 564[libgo_cv_func___sync_fetch_and_add_4=no])]) 565if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then 566 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1, 567 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32]) 568fi 569 570AC_CACHE_CHECK([for __sync_add_and_fetch_8], 571[libgo_cv_func___sync_add_and_fetch_8], 572[AC_LINK_IFELSE([ 573typedef unsigned int uint64 __attribute__ ((mode (DI))); 574uint64 i; 575int main() { return __sync_add_and_fetch (&i, 1); } 576], 577[libgo_cv_func___sync_add_and_fetch_8=yes], 578[libgo_cv_func___sync_add_and_fetch_8=no])]) 579if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then 580 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1, 581 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64]) 582fi 583 584dnl For x86 we want to use the -minline-all-stringops option to avoid 585dnl forcing a stack split when calling memcpy and friends. 586AC_CACHE_CHECK([whether compiler supports -minline-all-stringops], 587[libgo_cv_c_stringops], 588[CFLAGS_hold=$CFLAGS 589CFLAGS="$CFLAGS -minline-all-stringops" 590AC_COMPILE_IFELSE([int i;], 591[libgo_cv_c_stringops=yes], 592[libgo_cv_c_stringops=no]) 593CFLAGS=$CFLAGS_hold]) 594STRINGOPS_FLAG= 595if test "$libgo_cv_c_stringops" = yes; then 596 STRINGOPS_FLAG=-minline-all-stringops 597fi 598AC_SUBST(STRINGOPS_FLAG) 599 600dnl For x86 we want to compile the math library with -mfancy-math-387 601dnl -funsafe-math-optimizations so that we can use the builtin 602dnl instructions directly. 603AC_CACHE_CHECK([whether compiler supports -mfancy-math-387], 604[libgo_cv_c_fancymath], 605[CFLAGS_hold=$CFLAGS 606CFLAGS="$CFLAGS -mfancy-math-387" 607AC_COMPILE_IFELSE([int i;], 608[libgo_cv_c_fancymath=yes], 609[libgo_cv_c_fancymath=no]) 610CFLAGS=$CFLAGS_hold]) 611MATH_FLAG= 612if test "$libgo_cv_c_fancymath" = yes; then 613 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations" 614fi 615AC_SUBST(MATH_FLAG) 616 617CFLAGS_hold=$CFLAGS 618CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE" 619AC_CHECK_TYPES([off64_t]) 620CFLAGS=$CFLAGS_hold 621 622dnl Work out the size of the epoll_events struct on GNU/Linux. 623AC_CACHE_CHECK([epoll_event size], 624[libgo_cv_c_epoll_event_size], 625[AC_COMPUTE_INT(libgo_cv_c_epoll_event_size, 626[sizeof (struct epoll_event)], 627[#include <sys/epoll.h>], 628[libgo_cv_c_epoll_event_size=0])]) 629SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size} 630AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT) 631 632dnl Work out the offset of the fd field in the epoll_events struct on 633dnl GNU/Linux. 634AC_CACHE_CHECK([epoll_event data.fd offset], 635[libgo_cv_c_epoll_event_fd_offset], 636[AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset, 637[offsetof (struct epoll_event, data.fd)], 638[#include <stddef.h> 639#include <sys/epoll.h>], 640[libgo_cv_c_epoll_event_fd_offset=0])]) 641STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset} 642AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET) 643 644dnl See if struct exception is defined in <math.h>. 645AC_CHECK_TYPE([struct exception], 646[libgo_has_struct_exception=yes], 647[libgo_has_struct_exception=no], 648[#include <math.h>]) 649if test "$libgo_has_struct_exception" = "yes"; then 650 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1, 651 [Define to 1 if <math.h> defines struct exception]) 652fi 653 654dnl Check if makecontext expects the uc_stack member of ucontext to point 655dnl to the top of the stack. 656case "$target" in 657 sparc*-*-solaris2.[[89]]*) 658 libgo_cv_lib_makecontext_stack_top=yes 659 ;; 660 *) 661 libgo_cv_lib_makecontext_stack_top=no 662 ;; 663esac 664if test "$libgo_cv_lib_makecontext_stack_top" = "yes"; then 665 AC_DEFINE(MAKECONTEXT_STACK_TOP, 1, 666 [Define if makecontext expects top of stack in uc_stack.]) 667fi 668 669dnl See whether setcontext changes the value of TLS variables. 670AC_CACHE_CHECK([whether setcontext clobbers TLS variables], 671[libgo_cv_lib_setcontext_clobbers_tls], 672[CFLAGS_hold="$CFLAGS" 673CFLAGS="$PTHREAD_CFLAGS" 674LIBS_hold="$LIBS" 675LIBS="$LIBS $PTHREAD_LIBS" 676AC_CHECK_SIZEOF([void *]) 677AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8]) 678AC_RUN_IFELSE( 679 [AC_LANG_SOURCE([ 680#include <pthread.h> 681#include <stdlib.h> 682#include <ucontext.h> 683#include <unistd.h> 684 685__thread int tls; 686 687static char stack[[10 * 1024 * 1024]]; 688static ucontext_t c; 689 690/* Called via makecontext/setcontext. */ 691 692static void 693cfn (void) 694{ 695 exit (tls); 696} 697 698/* Called via pthread_create. */ 699 700static void * 701tfn (void *dummy) 702{ 703 /* The thread should still see this value after calling 704 setcontext. */ 705 tls = 0; 706 707 setcontext (&c); 708 709 /* The call to setcontext should not return. */ 710 abort (); 711} 712 713int 714main () 715{ 716 pthread_t tid; 717 718 /* The thread should not see this value. */ 719 tls = 1; 720 721 if (getcontext (&c) < 0) 722 abort (); 723 724 c.uc_stack.ss_sp = stack; 725#ifdef MAKECONTEXT_STACK_TOP 726 c.uc_stack.ss_sp += sizeof stack; 727#endif 728 c.uc_stack.ss_flags = 0; 729 c.uc_stack.ss_size = sizeof stack; 730 c.uc_link = NULL; 731 makecontext (&c, cfn, 0); 732 733 if (pthread_create (&tid, NULL, tfn, NULL) != 0) 734 abort (); 735 736 if (pthread_join (tid, NULL) != 0) 737 abort (); 738 739 /* The thread should have called exit. */ 740 abort (); 741} 742])], 743[libgo_cv_lib_setcontext_clobbers_tls=no], 744[libgo_cv_lib_setcontext_clobbers_tls=yes], 745[case "$target:$ptr_type_size" in 746 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64) 747 libgo_cv_lib_setcontext_clobbers_tls=yes ;; 748 *) 749 libgo_cv_lib_setcontext_clobbers_tls=no ;; 750 esac 751]) 752CFLAGS="$CFLAGS_hold" 753LIBS="$LIBS_hold" 754]) 755if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then 756 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1, 757 [Define if setcontext clobbers TLS variables]) 758fi 759 760AC_CACHE_CHECK([whether .eh_frame section should be read-only], 761libgo_cv_ro_eh_frame, [ 762libgo_cv_ro_eh_frame=no 763echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c 764if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then 765 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then 766 libgo_cv_ro_eh_frame=yes 767 elif grep '.section.*eh_frame.*#alloc' conftest.c \ 768 | grep -v '#write' > /dev/null; then 769 libgo_cv_ro_eh_frame=yes 770 fi 771fi 772rm -f conftest.* 773]) 774if test "x$libgo_cv_ro_eh_frame" = xyes; then 775 AC_DEFINE(EH_FRAME_FLAGS, "a", 776 [Define to the flags needed for the .section .eh_frame directive.]) 777else 778 AC_DEFINE(EH_FRAME_FLAGS, "aw", 779 [Define to the flags needed for the .section .eh_frame directive.]) 780fi 781 782AC_CACHE_CHECK([if assembler supports GNU comdat group syntax], 783libgo_cv_as_comdat_gnu, [ 784echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s 785if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then 786 libgo_cv_as_comdat_gnu=yes 787else 788 libgo_cv_as_comdat_gnu=no 789fi 790]) 791if test "x$libgo_cv_as_comdat_gnu" = xyes; then 792 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1, 793 [Define if your assembler supports GNU comdat group syntax.]) 794fi 795 796AC_CACHE_CHECK([assembler supports pc related relocs], 797libgo_cv_as_x86_pcrel, [ 798libgo_cv_as_x86_pcrel=yes 799echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s 800if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then 801 libgo_cv_as_x86_pcrel=no 802fi 803]) 804if test "x$libgo_cv_as_x86_pcrel" = xyes; then 805 AC_DEFINE(HAVE_AS_X86_PCREL, 1, 806 [Define if your assembler supports PC relative relocs.]) 807fi 808 809AC_CACHE_CHECK([assembler supports unwind section type], 810libgo_cv_as_x86_64_unwind_section_type, [ 811libgo_cv_as_x86_64_unwind_section_type=yes 812echo '.section .eh_frame,"a",@unwind' > conftest.s 813if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then 814 libgo_cv_as_x86_64_unwind_section_type=no 815fi 816]) 817if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then 818 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1, 819 [Define if your assembler supports unwind section type.]) 820fi 821 822AC_CACHE_SAVE 823 824if test ${multilib} = yes; then 825 multilib_arg="--enable-multilib" 826else 827 multilib_arg= 828fi 829 830AC_CONFIG_FILES(Makefile testsuite/Makefile) 831 832AC_CONFIG_COMMANDS([default], 833[if test -n "$CONFIG_FILES"; then 834 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so 835 # that multilib installs will end up installed in the correct place. 836 # The testsuite needs it for multilib-aware ABI baseline files. 837 # To work around this not being passed down from config-ml.in -> 838 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually 839 # append it here. Only modify Makefiles that have just been created. 840 # 841 # Also, get rid of this simulated-VPATH thing that automake does. 842 cat > vpsed << \_EOF 843s!`test -f '$<' || echo '$(srcdir)/'`!! 844_EOF 845 for i in $SUBDIRS; do 846 case $CONFIG_FILES in 847 *${i}/Makefile*) 848 #echo "Adding MULTISUBDIR to $i/Makefile" 849 sed -f vpsed $i/Makefile > tmp 850 grep '^MULTISUBDIR =' Makefile >> tmp 851 mv tmp $i/Makefile 852 ;; 853 esac 854 done 855 rm vpsed 856 fi 857], 858[ 859# Variables needed in config.status (file generation) which aren't already 860# passed by autoconf. 861SUBDIRS="$SUBDIRS" 862]) 863 864AC_OUTPUT 865