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(vtable-verify, 72[ --enable-vtable-verify Enable vtable verification feature ], 73[case "$enableval" in 74 yes) enable_vtable_verify=yes ;; 75 no) enable_vtable_verify=no ;; 76 *) enable_vtable_verify=no;; 77 esac], 78[enable_vtable_verify=no]) 79AC_SUBST(enable_vtable_verify) 80 81AC_ARG_WITH(aix-soname, 82[AS_HELP_STRING([--with-aix-soname=aix|svr4|both], 83 [shared library versioning (aka "SONAME") variant to provide on AIX])], 84[case "${host}:${enable_shared}" in 85 power*-*-aix[[5-9]]*:yes) 86 AC_MSG_CHECKING([which variant of shared library versioning to provide for shared libgcc]) 87 case ${withval} in 88 aix|svr4|both) ;; 89 *) AC_MSG_ERROR([Unknown argument to --with-aix-soname]);; 90 esac 91 AC_MSG_RESULT($withval) 92 ;; 93 *) with_aix_soname=aix ;; 94 esac 95], [with_aix_soname=aix]) 96AC_SUBST(with_aix_soname) 97 98GCC_PICFLAG 99AC_SUBST(PICFLAG) 100 101AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 102AC_ARG_ENABLE(version-specific-runtime-libs, 103[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ], 104[case "$enableval" in 105 yes) version_specific_libs=yes ;; 106 no) version_specific_libs=no ;; 107 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 108 esac], 109[version_specific_libs=no]) 110AC_MSG_RESULT($version_specific_libs) 111 112GCC_WITH_TOOLEXECLIBDIR 113 114AC_ARG_WITH(slibdir, 115[ --with-slibdir=DIR shared libraries in DIR [LIBDIR]], 116slibdir="$with_slibdir", 117[if test "${version_specific_libs}" = yes; then 118 slibdir='$(libsubdir)' 119elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then 120 case ${with_toolexeclibdir} in 121 no) 122 slibdir='$(exec_prefix)/$(host_noncanonical)/lib' 123 ;; 124 *) 125 slibdir=${with_toolexeclibdir} 126 ;; 127 esac 128else 129 slibdir='$(libdir)' 130fi]) 131AC_SUBST(slibdir) 132 133# Command-line options. 134# Very limited version of AC_MAINTAINER_MODE. 135AC_ARG_ENABLE([maintainer-mode], 136 [AC_HELP_STRING([--enable-maintainer-mode], 137 [enable make rules and dependencies not useful (and 138 sometimes confusing) to the casual installer])], 139 [case ${enable_maintainer_mode} in 140 yes) MAINT='' ;; 141 no) MAINT='#' ;; 142 *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;; 143 esac 144 maintainer_mode=${enableval}], 145 [MAINT='#']) 146AC_SUBST([MAINT])dnl 147 148AC_PROG_INSTALL 149 150AC_PROG_AWK 151# We need awk; bail out if it's missing. 152case ${AWK} in 153 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;; 154esac 155 156AC_CANONICAL_HOST 157ACX_NONCANONICAL_HOST 158ACX_NONCANONICAL_TARGET 159GCC_TOPLEV_SUBDIRS 160 161AC_ARG_ENABLE(gcov, 162[ --disable-gcov don't provide libgcov and related host tools], 163[], [case $target in 164 bpf-*-*) 165 enable_gcov=no 166 ;; 167 *) 168 enable_gcov=yes 169 ;; 170 esac]) 171AC_SUBST(enable_gcov) 172 173# Calculate toolexeclibdir 174# Also toolexecdir, though it's only used in toolexeclibdir 175case ${version_specific_libs} in 176 yes) 177 # Need the gcc compiler version to know where to install libraries 178 # and header files if --enable-version-specific-runtime-libs option 179 # is selected. 180 toolexecdir='$(libdir)/gcc/$(target_noncanonical)' 181 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' 182 ;; 183 no) 184 if test -n "$with_cross_host" && 185 test x"$with_cross_host" != x"no"; then 186 # Install a library built with a cross compiler in tooldir, not libdir. 187 toolexecdir='$(exec_prefix)/$(target_noncanonical)' 188 case ${with_toolexeclibdir} in 189 no) 190 toolexeclibdir='$(toolexecdir)/lib' 191 ;; 192 *) 193 toolexeclibdir=${with_toolexeclibdir} 194 ;; 195 esac 196 else 197 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)' 198 toolexeclibdir='$(libdir)' 199 fi 200 multi_os_directory=`$CC -print-multi-os-directory` 201 case $multi_os_directory in 202 .) ;; # Avoid trailing /. 203 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; 204 esac 205 ;; 206esac 207AC_SUBST(toolexecdir) 208AC_SUBST(toolexeclibdir) 209 210dnl These must be called before AM_PROG_LIBTOOL, because it may want 211dnl to call AC_CHECK_PROG. 212AC_CHECK_TOOL(AR, ar) 213AC_CHECK_TOOL(LIPO, lipo, :) 214AC_CHECK_TOOL(NM, nm) 215AC_CHECK_TOOL(RANLIB, ranlib, :) 216AC_CHECK_TOOL(STRIP, strip, :) 217AC_PROG_LN_S 218 219GCC_NO_EXECUTABLES 220AC_PROG_CC 221AC_PROG_CPP_WERROR 222 223AC_SYS_LARGEFILE 224 225AC_CHECK_SIZEOF([double]) 226AC_CHECK_SIZEOF([long double]) 227AS_VAR_ARITH([double_type_size], [$ac_cv_sizeof_double \* 8]) 228AS_VAR_ARITH([long_double_type_size], [$ac_cv_sizeof_long_double \* 8]) 229AC_SUBST(double_type_size) 230AC_SUBST(long_double_type_size) 231 232AC_CHECK_HEADERS(inttypes.h stdint.h stdlib.h ftw.h \ 233 unistd.h sys/stat.h sys/types.h \ 234 string.h strings.h memory.h sys/auxv.h sys/mman.h) 235AC_HEADER_STDC 236 237# Check for decimal float support. 238AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp], 239 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 240#include <fenv.h> 241]], [[ 242_Decimal32 x; 243int fe_except = 244 FE_INVALID|FE_DIVBYZERO|FE_OVERFLOW|FE_UNDERFLOW|FE_INEXACT; 245]])], 246 [libgcc_cv_dfp=yes], 247 [libgcc_cv_dfp=no])]) 248decimal_float=$libgcc_cv_dfp 249AC_SUBST(decimal_float) 250 251GCC_AC_ENABLE_DECIMAL_FLOAT([$host]) 252 253# Check for fixed-point support. 254AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point], 255 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_Sat _Fract x;])], 256 [libgcc_cv_fixed_point=yes], 257 [libgcc_cv_fixed_point=no])]) 258fixed_point=$libgcc_cv_fixed_point 259AC_SUBST(fixed_point) 260 261# For platforms with the unwind ABI which includes an unwind library, 262# libunwind, we can choose to use the system libunwind. 263# config.gcc also contains tests of with_system_libunwind. 264GCC_CHECK_UNWIND_GETIPINFO 265 266# Check if the compiler is configured for setjmp/longjmp exceptions. 267GCC_CHECK_SJLJ_EXCEPTIONS 268 269GCC_CET_FLAGS(CET_FLAGS) 270AC_SUBST(CET_FLAGS) 271 272AC_ARG_ENABLE([explicit-exception-frame-registration], 273 [AC_HELP_STRING([--enable-explicit-exception-frame-registration], 274 [register exception tables explicitly at module start, for use 275 e.g. for compatibility with installations without PT_GNU_EH_FRAME support])], 276[ 277force_explicit_eh_registry= 278if test "$enable_explicit_exception_frame_registration" = yes; then 279 if test $ac_cv_sjlj_exceptions = yes; then 280 AC_MSG_ERROR([Can't --enable-explicit-exception-frame-registration 281 with setjmp/longjmp exceptions]) 282 fi 283 force_explicit_eh_registry=-DUSE_EH_FRAME_REGISTRY_ALWAYS 284fi 285]) 286AC_SUBST([force_explicit_eh_registry]) 287 288AC_ARG_ENABLE([tm-clone-registry], 289[ --disable-tm-clone-registry disable TM clone registry], 290[ 291use_tm_clone_registry= 292if test "$enable_tm_clone_registry" = no; then 293 use_tm_clone_registry=-DUSE_TM_CLONE_REGISTRY=0 294fi 295], 296[ 297use_tm_clone_registry= 298case $target in 299 msp430*elfbare) 300 use_tm_clone_registry=-DUSE_TM_CLONE_REGISTRY=0 301 ;; 302esac 303]) 304AC_SUBST([use_tm_clone_registry]) 305 306AC_LIB_PROG_LD_GNU 307 308AC_MSG_CHECKING([for thread model used by GCC]) 309target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'` 310AC_MSG_RESULT([$target_thread_file]) 311 312# Check for assembler CFI support. 313AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi], 314 [AC_COMPILE_IFELSE( 315[AC_LANG_SOURCE([asm("\n\ 316 .text\n\ 317 .cfi_startproc\n\ 318 .cfi_personality 0, symbol\n\ 319 .cfi_endproc");])], 320 [libgcc_cv_cfi=yes], 321 [libgcc_cv_cfi=no])]) 322 323# Check 32bit or 64bit. In the case of MIPS, this really determines the 324# word size rather than the address size. 325cat > conftest.c <<EOF 326#if defined(__x86_64__) || (!defined(__i386__) && defined(__LP64__)) \ 327 || defined(__mips64) || defined(__loongarch64) 328host_address=64 329#else 330host_address=32 331#endif 332EOF 333eval `${CC-cc} -E conftest.c | grep host_address=` 334rm -f conftest.c 335 336case ${host} in 337mips*-*-*) 338 AC_CACHE_CHECK([whether the target is hard-float], 339 [libgcc_cv_mips_hard_float], 340 [AC_COMPILE_IFELSE( 341 [AC_LANG_SOURCE([#ifndef __mips_hard_float 342 #error FOO 343 #endif 344 ])], 345 [libgcc_cv_mips_hard_float=yes], 346 [libgcc_cv_mips_hard_float=no])]) 347esac 348 349case ${host} in 350*-*-solaris2*) 351 # Check for system-provided CRTs on Solaris 11.4. 352 AC_CACHE_CHECK([system-provided CRTs on Solaris], 353 [libgcc_cv_solaris_crts], 354 [libgcc_cv_solaris_crts=no 355 libgcc_sysroot="`${CC} -print-sysroot`" 356 libgcc_libdir="$libgcc_sysroot/usr/lib" 357 # At the time they were added, gcrt1.o became a symlink for backwards 358 # compatibility on x86, while crt1.o was added on sparc, so check for that. 359 case ${host} in 360 i?86-*-solaris2* | x86_64-*-solaris2*) 361 if test -h "$libgcc_libdir/gcrt1.o"; then libgcc_cv_solaris_crts=yes; fi 362 ;; 363 sparc*-*-solaris2*) 364 if test -f "$libgcc_libdir/crt1.o"; then libgcc_cv_solaris_crts=yes; fi 365 ;; 366 esac]) 367 if test $libgcc_cv_solaris_crts = yes; then 368 AC_DEFINE(HAVE_SOLARIS_CRTS, 1, 369 [Define if the system-provided CRTs are present on Solaris.]) 370 fi 371 ;; 372esac 373 374# Determine the version of glibc, if any, used on the target. 375AC_MSG_CHECKING([for target glibc version]) 376AC_ARG_WITH([glibc-version], 377 [AS_HELP_STRING([--with-glibc-version=M.N], 378 [assume GCC used with glibc version M.N or later])], [ 379if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then 380 glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'` 381 glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'` 382else 383 AC_MSG_ERROR([option --with-glibc-version requires a version number M.N]) 384fi], [ 385AC_COMPUTE_INT([glibc_version_major], [__GLIBC__], 386 [#include <features.h>], 387 [glibc_version_major=0]) 388AC_COMPUTE_INT([glibc_version_minor], [__GLIBC_MINOR__], 389 [#include <features.h>], 390 [glibc_version_minor=0])]) 391AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor]) 392 393# Determine floating-point type for powerpc*-*-linux* or vxworks7*. 394# Single-precision-only FPRs are not a supported configuration for 395# this target, so are not allowed for in this test. 396case ${host} in 397powerpc*-*-linux* | powerpc*-*-vxworks7*) 398 cat > conftest.c <<EOF 399#ifdef __powerpc64__ 400ppc_fp_type=64 401#elif defined _SOFT_FLOAT 402ppc_fp_type=soft 403#elif defined _SOFT_DOUBLE 404ppc_fp_type=e500v1 405#elif defined __NO_FPRS__ 406ppc_fp_type=e500v2 407#else 408ppc_fp_type=hard 409#endif 410EOF 411eval `${CC-cc} -E conftest.c | grep ppc_fp_type=` 412rm -f conftest.c 413# glibc 2.19 and later provide all the soft-fp functions, with proper 414# interactions with <fenv.h> exception and rounding mode handling, so 415# make libgcc's versions into compat symbols if a recent enough glibc 416# version is being used. 417ppc_fp_compat= 418case ${ppc_fp_type} in 419soft|e500v1|e500v2) 420 if test $glibc_version_major -gt 2 \ 421 || ( test $glibc_version_major -eq 2 \ 422 && test $glibc_version_minor -ge 19 ); then 423 ppc_fp_compat="t-softfp-compat" 424 fi 425 ;; 426esac 427;; 428esac 429 430case ${host} in 431# At present, we cannot turn -mfloat128 on via #pragma GCC target, so just 432# check if we have VSX (ISA 2.06) support to build the software libraries, and 433# whether the assembler can handle xsaddqp for hardware support. Also check if 434# a new glibc is being used so that __builtin_cpu_supports can be used. 435powerpc*-*-linux*) 436 saved_CFLAGS="$CFLAGS" 437 CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128" 438 AC_CACHE_CHECK([for PowerPC ISA 2.06 to build __float128 libraries], 439 [libgcc_cv_powerpc_float128], 440 [AC_COMPILE_IFELSE( 441 [AC_LANG_SOURCE([vector double dadd (vector double a, vector double b) { return a + b; }])], 442 [libgcc_cv_powerpc_float128=yes], 443 [libgcc_cv_powerpc_float128=no])]) 444 445 CFLAGS="$CFLAGS -mpower9-vector -mfloat128-hardware" 446 AC_CACHE_CHECK([for PowerPC ISA 3.0 to build hardware __float128 libraries], 447 [libgcc_cv_powerpc_float128_hw], 448 [AC_COMPILE_IFELSE( 449 [AC_LANG_SOURCE([#include <sys/auxv.h> 450 #ifndef AT_PLATFORM 451 #error "AT_PLATFORM is not defined" 452 #endif 453 #ifndef __BUILTIN_CPU_SUPPORTS__ 454 #error "__builtin_cpu_supports is not available" 455 #endif 456 vector unsigned char add (vector unsigned char a, vector unsigned char b) 457 { 458 vector unsigned char ret; 459 __asm__ ("xsaddqp %0,%1,%2" : "=v" (ret) : "v" (a), "v" (b)); 460 return ret; 461 } 462 void *add_resolver (void) { return (void *) add; } 463 __float128 add_ifunc (__float128, __float128) 464 __attribute__ ((__ifunc__ ("add_resolver")));])], 465 [libgcc_cv_powerpc_float128_hw=yes], 466 [libgcc_cv_powerpc_float128_hw=no])]) 467 CFLAGS="$saved_CFLAGS" 468 469 saved_CFLAGS="$CFLAGS" 470 CFLAGS="$CFLAGS -mcpu=power10 -mfloat128-hardware" 471 AC_CACHE_CHECK([for PowerPC ISA 3.1 to build hardware __float128 libraries], 472 [libgcc_cv_powerpc_3_1_float128_hw], 473 [AC_COMPILE_IFELSE( 474 [AC_LANG_SOURCE([#include <sys/auxv.h> 475 #ifndef AT_PLATFORM 476 #error "AT_PLATFORM is not defined" 477 #endif 478 #ifndef __BUILTIN_CPU_SUPPORTS__ 479 #error "__builtin_cpu_supports is not available" 480 #endif 481 vector unsigned char conv (vector unsigned char qs) 482 { 483 vector unsigned char ret; 484 __asm__ ("xscvsqqp %0,%1" : "=v" (ret) : "v" (qs)); 485 return ret; 486 } 487 void *conv_resolver (void) { return (void *) conv; } 488 __float128 conv_ifunc (__float128) 489 __attribute__ ((__ifunc__ ("conv_resolver")));])], 490 [libgcc_cv_powerpc_3_1_float128_hw=yes], 491 [libgcc_cv_powerpc_3_1_float128_hw=no])]) 492 CFLAGS="$saved_CFLAGS" 493esac 494 495# Collect host-machine-specific information. 496. ${srcdir}/config.host 497 498# Used for constructing correct paths for offload compilers. 499accel_dir_suffix= 500real_host_noncanonical=${host_noncanonical} 501if test x"$enable_as_accelerator_for" != x; then 502 accel_dir_suffix=/accel/${target_noncanonical} 503 real_host_noncanonical=${enable_as_accelerator_for} 504fi 505AC_SUBST(accel_dir_suffix) 506AC_SUBST(real_host_noncanonical) 507 508if test x"$enable_offload_targets" != x; then 509 extra_parts="${extra_parts} crtoffloadbegin.o crtoffloadend.o crtoffloadtable.o" 510fi 511 512# Check if Solaris/x86 linker supports ZERO terminator unwind entries. 513# This is after config.host so we can augment tmake_file. 514# Link with -nostartfiles -nodefaultlibs since neither are present while 515# building libgcc. 516case ${host} in 517i?86-*-solaris2* | x86_64-*-solaris2*) 518 cat > conftest.s <<EOF 519 .section .eh_frame,"a",@unwind 520 .zero 4 521 .section .jcr,"aw",@progbits 522 .zero 8 523EOF 524 if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then 525 tmake_file="${tmake_file} i386/t-crtstuff" 526 fi 527 ;; 528esac 529 530# Check if Solaris linker support v2 linker mapfile syntax. 531# Link with -nostartfiles -nodefaultlibs since neither are present while 532# building libgcc. 533case ${host} in 534*-*-solaris2*) 535 solaris_ld_v2_maps=no 536 echo 'int main(void) {return 0;}' > conftest.c 537 echo '$mapfile_version 2' > conftest.map 538 if AC_TRY_COMMAND([${CC-cc} -nostartfiles -nodefaultlibs -Wl,-M,conftest.map -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then 539 solaris_ld_v2_maps=yes 540 fi 541 ;; 542esac 543AC_SUBST(solaris_ld_v2_maps) 544 545# Check if xtensa target is configured for windowed ABI and thus needs to use 546# custom unwind code. 547# This is after config.host so we can augment tmake_file. 548case ${host} in 549xtensa*-*) 550 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 551 [#ifdef __XTENSA_CALL0_ABI__ 552 #error 553 #endif 554 ])], 555 [tmake_file="${tmake_file} xtensa/t-windowed"]) 556 ;; 557esac 558 559# Check for visibility support. This is after config.host so that 560# we can check for asm_hidden_op. 561AC_CACHE_CHECK([for __attribute__((visibility("hidden")))], 562 libgcc_cv_hidden_visibility_attribute, [ 563 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c 564 libgcc_cv_hidden_visibility_attribute=no 565 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then 566 if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then 567 libgcc_cv_hidden_visibility_attribute=yes 568 fi 569 fi 570 rm -f conftest.* 571 ]) 572 573if test $libgcc_cv_hidden_visibility_attribute = yes; then 574 vis_hide='-fvisibility=hidden -DHIDE_EXPORTS' 575 AC_DEFINE_UNQUOTED(AS_HIDDEN_DIRECTIVE, $asm_hidden_op, [Define to the .hidden-like directive if it exists.]) 576else 577 vis_hide= 578fi 579AC_SUBST(vis_hide) 580 581# Check for .cfi_sections .debug_frame support. 582AC_CACHE_CHECK([for .cfi_sections .debug_frame], 583 libgcc_cv_cfi_sections_directive, [ 584 echo 'int foo (int, char *);' > conftest.c 585 echo 'int bar (int x) { char *y = __builtin_alloca (x); return foo (x + 1, y) + 1; }' >> conftest.c 586 libgcc_cv_cfi_sections_directive=no 587 if AC_TRY_COMMAND(${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 588 if grep "\\.cfi_sections.*\\.debug_frame" conftest.s >/dev/null; then 589 libgcc_cv_cfi_sections_directive=yes 590 fi 591 fi 592 rm -f conftest.* 593 ]) 594if test $libgcc_cv_cfi_sections_directive = yes; then 595 AC_DEFINE(HAVE_AS_CFI_SECTIONS, 1, [Define to 1 if the assembler supports .cfi_sections .debug_frame directive.]) 596fi 597 598# See if we have thread-local storage. We can only test assembler 599# since link-time and run-time tests require the newly built 600# gcc, which can't be used to build executable due to that libgcc 601# is yet to be built here. 602GCC_CHECK_CC_TLS 603set_have_cc_tls= 604if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then 605 set_have_cc_tls="-DHAVE_CC_TLS" 606fi 607AC_SUBST(set_have_cc_tls) 608 609# See if we have emulated thread-local storage. 610GCC_CHECK_EMUTLS 611set_use_emutls= 612if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then 613 set_use_emutls="-DUSE_EMUTLS" 614fi 615AC_SUBST(set_use_emutls) 616 617dnl Check if as supports AVX instructions. 618AC_DEFUN([LIBGCC_CHECK_AS_AVX], [ 619case "${target}" in 620i[[34567]]86-*-* | x86_64-*-*) 621 AC_CACHE_CHECK([if the assembler supports AVX], libgcc_cv_as_avx, [ 622 AC_TRY_COMPILE([], [asm("vzeroupper");], 623 [libgcc_cv_as_avx=yes], [libgcc_cv_as_avx=no]) 624 ]) 625 if test x$libgcc_cv_as_avx = xyes; then 626 AC_DEFINE(HAVE_AS_AVX, 1, [Define to 1 if the assembler supports AVX.]) 627 fi 628 ;; 629esac]) 630LIBGCC_CHECK_AS_AVX 631 632dnl Check if as supports LSE instructions. 633AC_DEFUN([LIBGCC_CHECK_AS_LSE], [ 634case "${target}" in 635aarch64*-*-*) 636 AC_CACHE_CHECK([if the assembler supports LSE], libgcc_cv_as_lse, [ 637 AC_TRY_COMPILE([], 638changequote(,)dnl 639 asm(".arch armv8-a+lse\n\tcas w0, w1, [x2]"); 640changequote([,])dnl 641 , 642 [libgcc_cv_as_lse=yes], [libgcc_cv_as_lse=no]) 643 ]) 644 if test x$libgcc_cv_as_lse = xyes; then 645 AC_DEFINE(HAVE_AS_LSE, 1, [Define to 1 if the assembler supports LSE.]) 646 fi 647 ;; 648esac]) 649LIBGCC_CHECK_AS_LSE 650 651dnl Check if as supports RTM instructions. 652AC_CACHE_CHECK(for init priority support, libgcc_cv_init_priority, [ 653AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, 654 [[void ip (void) __attribute__ ((constructor (1)));]])], 655 [libgcc_cv_init_priority=yes],[libgcc_cv_init_priority=no])]) 656if test $libgcc_cv_init_priority = yes; then 657 AC_DEFINE(HAVE_INIT_PRIORITY, 1, 658 [Define if the compiler supports init priority.]) 659fi 660 661# Conditionalize the sfp-machine.h header for this target machine. 662if test -z "${sfp_machine_header}"; then 663 sfp_machine_header=$cpu_type/sfp-machine.h 664 if test -f ${srcdir}/config/${sfp_machine_header}; then 665 : 666 else 667 sfp_machine_header=no-sfp-machine.h 668 fi 669fi 670AC_SUBST(sfp_machine_header) 671 672# Conditionalize the makefile for this target machine. 673tmake_file_= 674for f in ${tmake_file} 675do 676 if test -f ${srcdir}/config/$f 677 then 678 tmake_file_="${tmake_file_} \$(srcdir)/config/$f" 679 fi 680done 681tmake_file="${tmake_file_}" 682AC_SUBST(tmake_file) 683 684# Likewise export definitions for libgcc_tm.h 685tm_file_= 686for f in ${tm_file} 687do 688 tm_file_="${tm_file_} \$(srcdir)/config/$f" 689done 690tm_file="${tm_file_}" 691AC_SUBST(tm_file) 692AC_SUBST(tm_defines) 693 694# Map from thread model to thread header. 695GCC_AC_THREAD_HEADER([$target_thread_file]) 696 697# Determine what GCC version number to use in filesystem paths. 698GCC_BASE_VER 699 700# Substitute configuration variables 701AC_SUBST(cpu_type) 702AC_SUBST(extra_parts) 703AC_SUBST(asm_hidden_op) 704AC_SUBST(enable_execute_stack) 705AC_SUBST(unwind_header) 706AC_SUBST(md_unwind_header) 707AC_SUBST(sfp_machine_header) 708AC_SUBST(thread_header) 709 710# We need multilib support. 711AC_CONFIG_FILES([Makefile]) 712AC_CONFIG_COMMANDS([default], 713 [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h 714if test -n "$CONFIG_FILES"; then 715 # FIXME: We shouldn't need to set ac_file 716 ac_file=Makefile 717 . ${libgcc_topdir}/config-ml.in 718fi]], 719[[srcdir=${srcdir} 720host=${host} 721with_target_subdir=${with_target_subdir} 722with_multisubdir=${with_multisubdir} 723ac_configure_args="--enable-multilib ${ac_configure_args}" 724CONFIG_SHELL=${CONFIG_SHELL-/bin/sh} 725libgcc_topdir=${libgcc_topdir} 726CC="${CC}" 727]]) 728AC_OUTPUT 729