1dnl Process this file with autoconf to produce a configure script. 2 3sinclude(../config/enable.m4) 4sinclude(../config/tls.m4) 5sinclude(../config/toolexeclibdir.m4) 6sinclude(../config/acx.m4) 7sinclude(../config/no-executables.m4) 8sinclude(../config/lib-ld.m4) 9sinclude(../config/override.m4) 10sinclude(../config/picflag.m4) 11sinclude(../config/dfp.m4) 12sinclude(../config/unwind_ipinfo.m4) 13sinclude(../config/gthr.m4) 14sinclude(../config/sjlj.m4) 15sinclude(../config/cet.m4) 16 17AC_INIT([GNU C Runtime Library], 1.0,,[libgcc]) 18AC_CONFIG_SRCDIR([static-object.mk]) 19 20# The libgcc should not depend on any header files 21AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS], 22 [m4_divert_text([DEFAULTS], 23 [ac_includes_default='/* none */'])]) 24 25AC_ARG_WITH(target-subdir, 26[ --with-target-subdir=SUBDIR Configuring in a subdirectory for target]) 27AC_ARG_WITH(cross-host, 28[ --with-cross-host=HOST Configuring with a cross compiler]) 29AC_ARG_WITH(ld, 30[ --with-ld arrange to use the specified ld (full pathname)]) 31 32if test "${srcdir}" = "."; then 33 if test -n "${with_build_subdir}"; then 34 libgcc_topdir="${srcdir}/../.." 35 with_target_subdir= 36 elif test -z "${with_target_subdir}"; then 37 libgcc_topdir="${srcdir}/.." 38 else 39 if test "${with_target_subdir}" != "."; then 40 libgcc_topdir="${srcdir}/${with_multisrctop}../.." 41 else 42 libgcc_topdir="${srcdir}/${with_multisrctop}.." 43 fi 44 fi 45else 46 libgcc_topdir="${srcdir}/.." 47fi 48AC_SUBST(libgcc_topdir) 49AC_CONFIG_AUX_DIR($libgcc_topdir) 50AC_CONFIG_HEADER(auto-target.h:config.in) 51 52AC_ARG_ENABLE(shared, 53[ --disable-shared don't provide a shared libgcc], 54[ 55 case $enable_shared in 56 yes | no) ;; 57 *) 58 enable_shared=no 59 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:," 60 for pkg in $enableval; do 61 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then 62 enable_shared=yes 63 fi 64 done 65 IFS="$ac_save_ifs" 66 ;; 67 esac 68], [enable_shared=yes]) 69AC_SUBST(enable_shared) 70 71AC_ARG_ENABLE(gcov, 72[ --disable-gcov don't provide libgcov and related host tools], 73[], [enable_gcov=yes]) 74AC_SUBST(enable_gcov) 75 76AC_ARG_ENABLE(vtable-verify, 77[ --enable-vtable-verify Enable vtable verification feature ], 78[case "$enableval" in 79 yes) enable_vtable_verify=yes ;; 80 no) enable_vtable_verify=no ;; 81 *) enable_vtable_verify=no;; 82 esac], 83[enable_vtable_verify=no]) 84AC_SUBST(enable_vtable_verify) 85 86AC_ARG_WITH(aix-soname, 87[AS_HELP_STRING([--with-aix-soname=aix|svr4|both], 88 [shared library versioning (aka "SONAME") variant to provide on AIX])], 89[case "${host}:${enable_shared}" in 90 power*-*-aix[[5-9]]*:yes) 91 AC_MSG_CHECKING([which variant of shared library versioning to provide for shared libgcc]) 92 case ${withval} in 93 aix|svr4|both) ;; 94 *) AC_MSG_ERROR([Unknown argument to --with-aix-soname]);; 95 esac 96 AC_MSG_RESULT($withval) 97 ;; 98 *) with_aix_soname=aix ;; 99 esac 100], [with_aix_soname=aix]) 101AC_SUBST(with_aix_soname) 102 103GCC_PICFLAG 104AC_SUBST(PICFLAG) 105 106AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 107AC_ARG_ENABLE(version-specific-runtime-libs, 108[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ], 109[case "$enableval" in 110 yes) version_specific_libs=yes ;; 111 no) version_specific_libs=no ;; 112 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 113 esac], 114[version_specific_libs=no]) 115AC_MSG_RESULT($version_specific_libs) 116 117GCC_WITH_TOOLEXECLIBDIR 118 119AC_ARG_WITH(slibdir, 120[ --with-slibdir=DIR shared libraries in DIR [LIBDIR]], 121slibdir="$with_slibdir", 122[if test "${version_specific_libs}" = yes; then 123 slibdir='$(libsubdir)' 124elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then 125 case ${with_toolexeclibdir} in 126 no) 127 slibdir='$(exec_prefix)/$(host_noncanonical)/lib' 128 ;; 129 *) 130 slibdir=${with_toolexeclibdir} 131 ;; 132 esac 133else 134 slibdir='$(libdir)' 135fi]) 136AC_SUBST(slibdir) 137 138# Command-line options. 139# Very limited version of AC_MAINTAINER_MODE. 140AC_ARG_ENABLE([maintainer-mode], 141 [AC_HELP_STRING([--enable-maintainer-mode], 142 [enable make rules and dependencies not useful (and 143 sometimes confusing) to the casual installer])], 144 [case ${enable_maintainer_mode} in 145 yes) MAINT='' ;; 146 no) MAINT='#' ;; 147 *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;; 148 esac 149 maintainer_mode=${enableval}], 150 [MAINT='#']) 151AC_SUBST([MAINT])dnl 152 153AC_PROG_INSTALL 154 155AC_PROG_AWK 156# We need awk; bail out if it's missing. 157case ${AWK} in 158 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;; 159esac 160 161AC_CANONICAL_HOST 162ACX_NONCANONICAL_HOST 163ACX_NONCANONICAL_TARGET 164GCC_TOPLEV_SUBDIRS 165 166# Calculate toolexeclibdir 167# Also toolexecdir, though it's only used in toolexeclibdir 168case ${version_specific_libs} in 169 yes) 170 # Need the gcc compiler version to know where to install libraries 171 # and header files if --enable-version-specific-runtime-libs option 172 # is selected. 173 toolexecdir='$(libdir)/gcc/$(target_noncanonical)' 174 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' 175 ;; 176 no) 177 if test -n "$with_cross_host" && 178 test x"$with_cross_host" != x"no"; then 179 # Install a library built with a cross compiler in tooldir, not libdir. 180 toolexecdir='$(exec_prefix)/$(target_noncanonical)' 181 case ${with_toolexeclibdir} in 182 no) 183 toolexeclibdir='$(toolexecdir)/lib' 184 ;; 185 *) 186 toolexeclibdir=${with_toolexeclibdir} 187 ;; 188 esac 189 else 190 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)' 191 toolexeclibdir='$(libdir)' 192 fi 193 multi_os_directory=`$CC -print-multi-os-directory` 194 case $multi_os_directory in 195 .) ;; # Avoid trailing /. 196 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; 197 esac 198 ;; 199esac 200AC_SUBST(toolexecdir) 201AC_SUBST(toolexeclibdir) 202 203dnl These must be called before AM_PROG_LIBTOOL, because it may want 204dnl to call AC_CHECK_PROG. 205AC_CHECK_TOOL(AR, ar) 206AC_CHECK_TOOL(LIPO, lipo, :) 207AC_CHECK_TOOL(NM, nm) 208AC_CHECK_TOOL(RANLIB, ranlib, :) 209AC_CHECK_TOOL(STRIP, strip, :) 210AC_PROG_LN_S 211 212GCC_NO_EXECUTABLES 213AC_PROG_CC 214AC_PROG_CPP_WERROR 215 216AC_SYS_LARGEFILE 217 218AC_CHECK_SIZEOF([double]) 219AC_CHECK_SIZEOF([long double]) 220AS_VAR_ARITH([double_type_size], [$ac_cv_sizeof_double \* 8]) 221AS_VAR_ARITH([long_double_type_size], [$ac_cv_sizeof_long_double \* 8]) 222AC_SUBST(double_type_size) 223AC_SUBST(long_double_type_size) 224 225AC_CHECK_HEADERS(inttypes.h stdint.h stdlib.h ftw.h \ 226 unistd.h sys/stat.h sys/types.h \ 227 string.h strings.h memory.h sys/auxv.h) 228AC_HEADER_STDC 229 230# Check for decimal float support. 231AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp], 232 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 233#include <fenv.h> 234]], [[ 235_Decimal32 x; 236int fe_except = 237 FE_INVALID|FE_DIVBYZERO|FE_OVERFLOW|FE_UNDERFLOW|FE_INEXACT; 238]])], 239 [libgcc_cv_dfp=yes], 240 [libgcc_cv_dfp=no])]) 241decimal_float=$libgcc_cv_dfp 242AC_SUBST(decimal_float) 243 244GCC_AC_ENABLE_DECIMAL_FLOAT([$host]) 245 246# Check for fixed-point support. 247AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point], 248 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_Sat _Fract x;])], 249 [libgcc_cv_fixed_point=yes], 250 [libgcc_cv_fixed_point=no])]) 251fixed_point=$libgcc_cv_fixed_point 252AC_SUBST(fixed_point) 253 254# For platforms with the unwind ABI which includes an unwind library, 255# libunwind, we can choose to use the system libunwind. 256# config.gcc also contains tests of with_system_libunwind. 257GCC_CHECK_UNWIND_GETIPINFO 258 259# Check if the compiler is configured for setjmp/longjmp exceptions. 260GCC_CHECK_SJLJ_EXCEPTIONS 261 262GCC_CET_FLAGS(CET_FLAGS) 263AC_SUBST(CET_FLAGS) 264 265AC_ARG_ENABLE([explicit-exception-frame-registration], 266 [AC_HELP_STRING([--enable-explicit-exception-frame-registration], 267 [register exception tables explicitly at module start, for use 268 e.g. for compatibility with installations without PT_GNU_EH_FRAME support])], 269[ 270force_explicit_eh_registry= 271if test "$enable_explicit_exception_frame_registration" = yes; then 272 if test $ac_cv_sjlj_exceptions = yes; then 273 AC_MSG_ERROR([Can't --enable-explicit-exception-frame-registration 274 with setjmp/longjmp exceptions]) 275 fi 276 force_explicit_eh_registry=-DUSE_EH_FRAME_REGISTRY_ALWAYS 277fi 278]) 279AC_SUBST([force_explicit_eh_registry]) 280 281AC_ARG_ENABLE([tm-clone-registry], 282[ --disable-tm-clone-registry disable TM clone registry], 283[ 284use_tm_clone_registry= 285if test "$enable_tm_clone_registry" = no; then 286 use_tm_clone_registry=-DUSE_TM_CLONE_REGISTRY=0 287fi 288], 289[ 290use_tm_clone_registry= 291case $target in 292 msp430*elfbare) 293 use_tm_clone_registry=-DUSE_TM_CLONE_REGISTRY=0 294 ;; 295esac 296]) 297AC_SUBST([use_tm_clone_registry]) 298 299AC_LIB_PROG_LD_GNU 300 301AC_MSG_CHECKING([for thread model used by GCC]) 302target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'` 303AC_MSG_RESULT([$target_thread_file]) 304 305# Check for assembler CFI support. 306AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi], 307 [AC_COMPILE_IFELSE( 308[AC_LANG_SOURCE([asm("\n\ 309 .text\n\ 310 .cfi_startproc\n\ 311 .cfi_personality 0, symbol\n\ 312 .cfi_endproc");])], 313 [libgcc_cv_cfi=yes], 314 [libgcc_cv_cfi=no])]) 315 316# Check 32bit or 64bit. In the case of MIPS, this really determines the 317# word size rather than the address size. 318cat > conftest.c <<EOF 319#if defined(__x86_64__) || (!defined(__i386__) && defined(__LP64__)) \ 320 || defined(__mips64) 321host_address=64 322#else 323host_address=32 324#endif 325EOF 326eval `${CC-cc} -E conftest.c | grep host_address=` 327rm -f conftest.c 328 329case ${host} in 330mips*-*-*) 331 AC_CACHE_CHECK([whether the target is hard-float], 332 [libgcc_cv_mips_hard_float], 333 [AC_COMPILE_IFELSE( 334 [AC_LANG_SOURCE([#ifndef __mips_hard_float 335 #error FOO 336 #endif 337 ])], 338 [libgcc_cv_mips_hard_float=yes], 339 [libgcc_cv_mips_hard_float=no])]) 340esac 341 342case ${host} in 343*-*-solaris2*) 344 # Check for system-provided CRTs on Solaris 11.4. 345 AC_CACHE_CHECK([system-provided CRTs on Solaris], 346 [libgcc_cv_solaris_crts], 347 [libgcc_cv_solaris_crts=no 348 libgcc_sysroot="`${CC} -print-sysroot`" 349 libgcc_libdir="$libgcc_sysroot/usr/lib" 350 # At the time they were added, gcrt1.o became a symlink for backwards 351 # compatibility on x86, while crt1.o was added on sparc, so check for that. 352 case ${host} in 353 i?86-*-solaris2* | x86_64-*-solaris2*) 354 if test -h "$libgcc_libdir/gcrt1.o"; then libgcc_cv_solaris_crts=yes; fi 355 ;; 356 sparc*-*-solaris2*) 357 if test -f "$libgcc_libdir/crt1.o"; then libgcc_cv_solaris_crts=yes; fi 358 ;; 359 esac]) 360 if test $libgcc_cv_solaris_crts = yes; then 361 AC_DEFINE(HAVE_SOLARIS_CRTS, 1, 362 [Define if the system-provided CRTs are present on Solaris.]) 363 fi 364 ;; 365esac 366 367# Determine the version of glibc, if any, used on the target. 368AC_MSG_CHECKING([for target glibc version]) 369AC_ARG_WITH([glibc-version], 370 [AS_HELP_STRING([--with-glibc-version=M.N], 371 [assume GCC used with glibc version M.N or later])], [ 372if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then 373 glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'` 374 glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'` 375else 376 AC_MSG_ERROR([option --with-glibc-version requires a version number M.N]) 377fi], [ 378AC_COMPUTE_INT([glibc_version_major], [__GLIBC__], 379 [#include <features.h>], 380 [glibc_version_major=0]) 381AC_COMPUTE_INT([glibc_version_minor], [__GLIBC_MINOR__], 382 [#include <features.h>], 383 [glibc_version_minor=0])]) 384AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor]) 385 386# Determine floating-point type for powerpc*-*-linux*. 387# Single-precision-only FPRs are not a supported configuration for 388# this target, so are not allowed for in this test. 389case ${host} in 390powerpc*-*-linux*) 391 cat > conftest.c <<EOF 392#ifdef __powerpc64__ 393ppc_fp_type=64 394#elif defined _SOFT_FLOAT 395ppc_fp_type=soft 396#elif defined _SOFT_DOUBLE 397ppc_fp_type=e500v1 398#elif defined __NO_FPRS__ 399ppc_fp_type=e500v2 400#else 401ppc_fp_type=hard 402#endif 403EOF 404eval `${CC-cc} -E conftest.c | grep ppc_fp_type=` 405rm -f conftest.c 406# glibc 2.19 and later provide all the soft-fp functions, with proper 407# interactions with <fenv.h> exception and rounding mode handling, so 408# make libgcc's versions into compat symbols if a recent enough glibc 409# version is being used. 410ppc_fp_compat= 411case ${ppc_fp_type} in 412soft|e500v1|e500v2) 413 if test $glibc_version_major -gt 2 \ 414 || ( test $glibc_version_major -eq 2 \ 415 && test $glibc_version_minor -ge 19 ); then 416 ppc_fp_compat="t-softfp-compat" 417 fi 418 ;; 419esac 420;; 421esac 422 423case ${host} in 424# At present, we cannot turn -mfloat128 on via #pragma GCC target, so just 425# check if we have VSX (ISA 2.06) support to build the software libraries, and 426# whether the assembler can handle xsaddqp for hardware support. Also check if 427# a new glibc is being used so that __builtin_cpu_supports can be used. 428powerpc*-*-linux*) 429 saved_CFLAGS="$CFLAGS" 430 CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128" 431 AC_CACHE_CHECK([for PowerPC ISA 2.06 to build __float128 libraries], 432 [libgcc_cv_powerpc_float128], 433 [AC_COMPILE_IFELSE( 434 [AC_LANG_SOURCE([vector double dadd (vector double a, vector double b) { return a + b; }])], 435 [libgcc_cv_powerpc_float128=yes], 436 [libgcc_cv_powerpc_float128=no])]) 437 438 CFLAGS="$CFLAGS -mpower9-vector -mfloat128-hardware" 439 AC_CACHE_CHECK([for PowerPC ISA 3.0 to build hardware __float128 libraries], 440 [libgcc_cv_powerpc_float128_hw], 441 [AC_COMPILE_IFELSE( 442 [AC_LANG_SOURCE([#include <sys/auxv.h> 443 #ifndef AT_PLATFORM 444 #error "AT_PLATFORM is not defined" 445 #endif 446 #ifndef __BUILTIN_CPU_SUPPORTS__ 447 #error "__builtin_cpu_supports is not available" 448 #endif 449 vector unsigned char add (vector unsigned char a, vector unsigned char b) 450 { 451 vector unsigned char ret; 452 __asm__ ("xsaddqp %0,%1,%2" : "=v" (ret) : "v" (a), "v" (b)); 453 return ret; 454 } 455 void *add_resolver (void) { return (void *) add; } 456 __float128 add_ifunc (__float128, __float128) 457 __attribute__ ((__ifunc__ ("add_resolver")));])], 458 [libgcc_cv_powerpc_float128_hw=yes], 459 [libgcc_cv_powerpc_float128_hw=no])]) 460 CFLAGS="$saved_CFLAGS" 461esac 462 463# Collect host-machine-specific information. 464. ${srcdir}/config.host 465 466# Used for constructing correct paths for offload compilers. 467accel_dir_suffix= 468real_host_noncanonical=${host_noncanonical} 469if test x"$enable_as_accelerator_for" != x; then 470 accel_dir_suffix=/accel/${target_noncanonical} 471 real_host_noncanonical=${enable_as_accelerator_for} 472fi 473AC_SUBST(accel_dir_suffix) 474AC_SUBST(real_host_noncanonical) 475 476if test x"$enable_offload_targets" != x; then 477 extra_parts="${extra_parts} crtoffloadbegin.o crtoffloadend.o crtoffloadtable.o" 478fi 479 480# Check if Solaris/x86 linker supports ZERO terminator unwind entries. 481# This is after config.host so we can augment tmake_file. 482# Link with -nostartfiles -nodefaultlibs since neither are present while 483# building libgcc. 484case ${host} in 485i?86-*-solaris2* | x86_64-*-solaris2*) 486 cat > conftest.s <<EOF 487 .section .eh_frame,"a",@unwind 488 .zero 4 489 .section .jcr,"aw",@progbits 490 .zero 8 491EOF 492 if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then 493 tmake_file="${tmake_file} i386/t-crtstuff" 494 fi 495 ;; 496esac 497 498# Check if Solaris linker support v2 linker mapfile syntax. 499# Link with -nostartfiles -nodefaultlibs since neither are present while 500# building libgcc. 501case ${host} in 502*-*-solaris2*) 503 solaris_ld_v2_maps=no 504 echo 'int main(void) {return 0;}' > conftest.c 505 echo '$mapfile_version 2' > conftest.map 506 if AC_TRY_COMMAND([${CC-cc} -nostartfiles -nodefaultlibs -Wl,-M,conftest.map -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then 507 solaris_ld_v2_maps=yes 508 fi 509 ;; 510esac 511AC_SUBST(solaris_ld_v2_maps) 512 513# Check if xtensa target is configured for windowed ABI and thus needs to use 514# custom unwind code. 515# This is after config.host so we can augment tmake_file. 516case ${host} in 517xtensa*-*) 518 cat > conftest.c <<EOF 519 #ifdef __XTENSA_CALL0_ABI__ 520 #error 521 #endif 522EOF 523 if AC_TRY_COMMAND(${CC-cc} -E -o conftest.i conftest.c 1>&AS_MESSAGE_LOG_FD); then 524 tmake_file="${tmake_file} xtensa/t-windowed" 525 fi 526 ;; 527esac 528 529# Check for visibility support. This is after config.host so that 530# we can check for asm_hidden_op. 531AC_CACHE_CHECK([for __attribute__((visibility("hidden")))], 532 libgcc_cv_hidden_visibility_attribute, [ 533 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c 534 libgcc_cv_hidden_visibility_attribute=no 535 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then 536 if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then 537 libgcc_cv_hidden_visibility_attribute=yes 538 fi 539 fi 540 rm -f conftest.* 541 ]) 542 543if test $libgcc_cv_hidden_visibility_attribute = yes; then 544 vis_hide='-fvisibility=hidden -DHIDE_EXPORTS' 545 AC_DEFINE_UNQUOTED(AS_HIDDEN_DIRECTIVE, $asm_hidden_op, [Define to the .hidden-like directive if it exists.]) 546else 547 vis_hide= 548fi 549AC_SUBST(vis_hide) 550 551# Check for .cfi_sections .debug_frame support. 552AC_CACHE_CHECK([for .cfi_sections .debug_frame], 553 libgcc_cv_cfi_sections_directive, [ 554 echo 'int foo (int, char *);' > conftest.c 555 echo 'int bar (int x) { char *y = __builtin_alloca (x); return foo (x + 1, y) + 1; }' >> conftest.c 556 libgcc_cv_cfi_sections_directive=no 557 if AC_TRY_COMMAND(${CC-cc} -Werror -g -fno-asynchronous-unwind-tables -fno-unwind-tables -fno-exceptions -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then 558 if grep "\\.cfi_sections.*\\.debug_frame" conftest.s >/dev/null; then 559 libgcc_cv_cfi_sections_directive=yes 560 fi 561 fi 562 rm -f conftest.* 563 ]) 564if test $libgcc_cv_cfi_sections_directive = yes; then 565 AC_DEFINE(HAVE_AS_CFI_SECTIONS, 1, [Define to 1 if the assembler supports .cfi_sections .debug_frame directive.]) 566fi 567 568# See if we have thread-local storage. We can only test assembler 569# since link-time and run-time tests require the newly built 570# gcc, which can't be used to build executable due to that libgcc 571# is yet to be built here. 572GCC_CHECK_CC_TLS 573set_have_cc_tls= 574if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then 575 set_have_cc_tls="-DHAVE_CC_TLS" 576fi 577AC_SUBST(set_have_cc_tls) 578 579# See if we have emulated thread-local storage. 580GCC_CHECK_EMUTLS 581set_use_emutls= 582if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then 583 set_use_emutls="-DUSE_EMUTLS" 584fi 585AC_SUBST(set_use_emutls) 586 587dnl Check if as supports AVX instructions. 588AC_DEFUN([LIBGCC_CHECK_AS_AVX], [ 589case "${target}" in 590i[[34567]]86-*-* | x86_64-*-*) 591 AC_CACHE_CHECK([if the assembler supports AVX], libgcc_cv_as_avx, [ 592 AC_TRY_COMPILE([], [asm("vzeroupper");], 593 [libgcc_cv_as_avx=yes], [libgcc_cv_as_avx=no]) 594 ]) 595 if test x$libgcc_cv_as_avx = xyes; then 596 AC_DEFINE(HAVE_AS_AVX, 1, [Define to 1 if the assembler supports AVX.]) 597 fi 598 ;; 599esac]) 600LIBGCC_CHECK_AS_AVX 601 602dnl Check if as supports LSE instructions. 603AC_DEFUN([LIBGCC_CHECK_AS_LSE], [ 604case "${target}" in 605aarch64*-*-*) 606 AC_CACHE_CHECK([if the assembler supports LSE], libgcc_cv_as_lse, [ 607 AC_TRY_COMPILE([], 608changequote(,)dnl 609 asm(".arch armv8-a+lse\n\tcas w0, w1, [x2]"); 610changequote([,])dnl 611 , 612 [libgcc_cv_as_lse=yes], [libgcc_cv_as_lse=no]) 613 ]) 614 if test x$libgcc_cv_as_lse = xyes; then 615 AC_DEFINE(HAVE_AS_LSE, 1, [Define to 1 if the assembler supports LSE.]) 616 fi 617 ;; 618esac]) 619LIBGCC_CHECK_AS_LSE 620 621dnl Check if as supports RTM instructions. 622AC_CACHE_CHECK(for init priority support, libgcc_cv_init_priority, [ 623AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, 624 [[void ip (void) __attribute__ ((constructor (1)));]])], 625 [libgcc_cv_init_priority=yes],[libgcc_cv_init_priority=no])]) 626if test $libgcc_cv_init_priority = yes; then 627 AC_DEFINE(HAVE_INIT_PRIORITY, 1, 628 [Define if the compiler supports init priority.]) 629fi 630 631# Conditionalize the sfp-machine.h header for this target machine. 632if test -z "${sfp_machine_header}"; then 633 sfp_machine_header=$cpu_type/sfp-machine.h 634 if test -f ${srcdir}/config/${sfp_machine_header}; then 635 : 636 else 637 sfp_machine_header=no-sfp-machine.h 638 fi 639fi 640AC_SUBST(sfp_machine_header) 641 642# Conditionalize the makefile for this target machine. 643tmake_file_= 644for f in ${tmake_file} 645do 646 if test -f ${srcdir}/config/$f 647 then 648 tmake_file_="${tmake_file_} \$(srcdir)/config/$f" 649 fi 650done 651tmake_file="${tmake_file_}" 652AC_SUBST(tmake_file) 653 654# Likewise export definitions for libgcc_tm.h 655tm_file_= 656for f in ${tm_file} 657do 658 tm_file_="${tm_file_} \$(srcdir)/config/$f" 659done 660tm_file="${tm_file_}" 661AC_SUBST(tm_file) 662AC_SUBST(tm_defines) 663 664# Map from thread model to thread header. 665GCC_AC_THREAD_HEADER([$target_thread_file]) 666 667# Determine what GCC version number to use in filesystem paths. 668GCC_BASE_VER 669 670# Substitute configuration variables 671AC_SUBST(cpu_type) 672AC_SUBST(extra_parts) 673AC_SUBST(asm_hidden_op) 674AC_SUBST(enable_execute_stack) 675AC_SUBST(unwind_header) 676AC_SUBST(md_unwind_header) 677AC_SUBST(sfp_machine_header) 678AC_SUBST(thread_header) 679 680# We need multilib support. 681AC_CONFIG_FILES([Makefile]) 682AC_CONFIG_COMMANDS([default], 683 [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h 684if test -n "$CONFIG_FILES"; then 685 # FIXME: We shouldn't need to set ac_file 686 ac_file=Makefile 687 . ${libgcc_topdir}/config-ml.in 688fi]], 689[[srcdir=${srcdir} 690host=${host} 691with_target_subdir=${with_target_subdir} 692with_multisubdir=${with_multisubdir} 693ac_configure_args="--enable-multilib ${ac_configure_args}" 694CONFIG_SHELL=${CONFIG_SHELL-/bin/sh} 695libgcc_topdir=${libgcc_topdir} 696CC="${CC}" 697]]) 698AC_OUTPUT 699