1# Process this file with autoreconf to produce a configure script. 2 3AC_PREREQ(2.64) 4AC_INIT(package-unused, version-unused,, libstdc++) 5AC_CONFIG_SRCDIR(src/shared/hashtable-aux.cc) 6AC_CONFIG_HEADER(config.h) 7 8# This works around the fact that libtool configuration may change LD 9# for this particular configuration, but some shells, instead of 10# keeping the changes in LD private, export them just because LD is 11# exported. Only used at the end of this file. 12### am handles this now? ORIGINAL_LD_FOR_MULTILIBS=$LD 13 14# Find the rest of the source tree framework. 15AM_ENABLE_MULTILIB(, ..) 16 17# Gets build, host, target, *_vendor, *_cpu, *_os, etc. 18# 19# You will slowly go insane if you do not grok the following fact: when 20# building v3 as part of the compiler, the top-level /target/ becomes the 21# library's /host/. configure then causes --target to default to --host, 22# exactly like any other package using autoconf. Therefore, 'target' and 23# 'host' will always be the same. This makes sense both for native and 24# cross compilers, just think about it for a little while. :-) 25# 26# Also, if v3 is being configured as part of a cross compiler, the top-level 27# configure script will pass the "real" host as $with_cross_host. 28# 29# Do not delete or change the following two lines. For why, see 30# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html 31AC_CANONICAL_SYSTEM 32target_alias=${target_alias-$host_alias} 33 34# Handy for debugging: 35#AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5 36 37if test "$build" != "$host"; then 38 # We are being configured with some form of cross compiler. 39 GLIBCXX_IS_NATIVE=false 40 case "$host","$target" in 41 # Darwin crosses can use the host system's libraries and headers, 42 # because of the fat library support. Of course, it must be the 43 # same version of Darwin on both sides. Allow the user to 44 # just say --target=foo-darwin without a version number to mean 45 # "the version on this system". 46 *-*-darwin*,*-*-darwin*) 47 hostos=`echo $host | sed 's/.*-darwin/darwin/'` 48 targetos=`echo $target | sed 's/.*-darwin/darwin/'` 49 if test $hostos = $targetos -o $targetos = darwin ; then 50 GLIBCXX_IS_NATIVE=true 51 fi 52 ;; 53 54 *) 55 GCC_NO_EXECUTABLES 56 ;; 57 esac 58else 59 GLIBCXX_IS_NATIVE=true 60fi 61 62# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the 63# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. 64# 1.x: minimum required version 65# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch 66# of other PACKAGE_* variables will, however, and there's nothing 67# we can do about that; they come from AC_INIT). 68# foreign: we don't follow the normal rules for GNU packages (no COPYING 69# file in the top srcdir, etc, etc), so stop complaining. 70# no-dependencies: turns off auto dependency generation (just for now) 71# no-dist: we don't want 'dist' and related rules. 72# -Wall: turns on all automake warnings... 73# -Wno-portability: ...except this one, since GNU make is now required. 74AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies no-dist -Wall -Wno-portability -Wno-override]) 75AH_TEMPLATE(PACKAGE, [Name of package]) 76AH_TEMPLATE(VERSION, [Version number of package]) 77 78# -fno-builtin must be present here so that a non-conflicting form of 79# std::exit can be guessed by AC_PROG_CXX, and used in later tests. 80 81save_CXXFLAGS="$CXXFLAGS" 82CXXFLAGS="$CXXFLAGS -fno-builtin" 83AC_PROG_CC 84AC_PROG_CXX 85CXXFLAGS="$save_CXXFLAGS" 86 87# Runs configure.host, and assorted other critical bits. Sets 88# up critical shell variables. 89GLIBCXX_CONFIGURE 90 91# Libtool setup. 92if test "x${with_newlib}" != "xyes"; then 93 AC_LIBTOOL_DLOPEN 94fi 95AM_PROG_LIBTOOL 96ACX_LT_HOST_FLAGS 97AC_SUBST(enable_shared) 98AC_SUBST(enable_static) 99 100# libtool variables for C++ shared and position-independent compiles. 101# 102# Use glibcxx_lt_pic_flag to designate the automake variable 103# used to encapsulate the default libtool approach to creating objects 104# with position-independent code. Default: -prefer-pic. 105# 106# Use glibcxx_compiler_shared_flag to designate a compile-time flags for 107# creating shared objects. Default: -D_GLIBCXX_SHARED. 108# 109# Use glibcxx_compiler_pic_flag to designate a compile-time flags for 110# creating position-independent objects. This varies with the target 111# hardware and operating system, but is often: -DPIC -fPIC. 112if test "$enable_shared" = yes; then 113 glibcxx_lt_pic_flag="-prefer-pic" 114 glibcxx_compiler_pic_flag="$lt_prog_compiler_pic_CXX" 115 glibcxx_compiler_shared_flag="-D_GLIBCXX_SHARED" 116 117else 118 glibcxx_lt_pic_flag= 119 glibcxx_compiler_pic_flag= 120 glibcxx_compiler_shared_flag= 121fi 122AC_SUBST(glibcxx_lt_pic_flag) 123AC_SUBST(glibcxx_compiler_pic_flag) 124AC_SUBST(glibcxx_compiler_shared_flag) 125 126# Override the libtool's pic_flag and pic_mode. 127# Do this step after AM_PROG_LIBTOOL, but before AC_OUTPUT. 128# NB: this impacts --with-pic and --without-pic. 129lt_prog_compiler_pic_CXX="$glibcxx_compiler_pic_flag $glibcxx_compiler_shared_flag" 130pic_mode='default' 131 132# Eliminate -lstdc++ addition to postdeps for cross compiles. 133postdeps_CXX=`echo " $postdeps_CXX " | sed 's, -lstdc++ ,,g'` 134 135# Possibly disable most of the library. 136## TODO: Consider skipping unncessary tests altogether in this case, rather 137## than just ignoring the results. Faster /and/ more correct, win win. 138GLIBCXX_ENABLE_HOSTED 139 140# Enable descriptive messages to standard output on termination. 141GLIBCXX_ENABLE_VERBOSE 142 143# Enable compiler support that doesn't require linking. 144GLIBCXX_ENABLE_SJLJ_EXCEPTIONS 145GLIBCXX_ENABLE_PCH($is_hosted) 146GLIBCXX_ENABLE_THREADS 147GLIBCXX_ENABLE_ATOMIC_BUILTINS 148GLIBCXX_ENABLE_DECIMAL_FLOAT 149GLIBCXX_ENABLE_INT128_FLOAT128 150 151# Checks for compiler support that doesn't require linking. 152GLIBCXX_CHECK_COMPILER_FEATURES 153 154# Enable all the variable C++ runtime options that don't require linking. 155GLIBCXX_ENABLE_CSTDIO 156GLIBCXX_ENABLE_CLOCALE 157GLIBCXX_ENABLE_ALLOCATOR 158GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host 159GLIBCXX_ENABLE_LONG_LONG([yes]) 160GLIBCXX_ENABLE_WCHAR_T([yes]) 161GLIBCXX_ENABLE_C99([yes]) 162GLIBCXX_ENABLE_CONCEPT_CHECKS([no]) 163GLIBCXX_ENABLE_DEBUG_FLAGS(["-gdwarf-4 -g3 -O0"]) 164GLIBCXX_ENABLE_DEBUG([no]) 165GLIBCXX_ENABLE_PARALLEL([yes]) 166GLIBCXX_ENABLE_CXX_FLAGS 167GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no]) 168GLIBCXX_ENABLE_EXTERN_TEMPLATE([yes]) 169GLIBCXX_ENABLE_PYTHON 170GLIBCXX_ENABLE_WERROR([yes]) 171 172# Checks for operating systems support that doesn't require linking. 173GLIBCXX_CHECK_STDIO_PROTO 174GLIBCXX_CHECK_SYSTEM_ERROR 175 176# For the streamoff typedef. 177GLIBCXX_CHECK_INT64_T 178 179# For LFS support. 180GLIBCXX_CHECK_LFS 181 182# For showmanyc_helper(). 183AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h) 184GLIBCXX_CHECK_POLL 185GLIBCXX_CHECK_S_ISREG_OR_S_IFREG 186 187# For xsputn_2(). 188AC_CHECK_HEADERS(sys/uio.h) 189GLIBCXX_CHECK_WRITEV 190 191# For C99 support to TR1. 192GLIBCXX_CHECK_C99_TR1 193 194# For the EOF, SEEK_CUR, and SEEK_END integer constants. 195GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS 196 197# For gettimeofday support. 198GLIBCXX_CHECK_GETTIMEOFDAY 199 200# For clock_gettime, nanosleep and sched_yield support. 201# NB: The default is [no], because otherwise it requires linking. 202GLIBCXX_ENABLE_LIBSTDCXX_TIME([no]) 203 204AC_LC_MESSAGES 205 206# For hardware_concurrency 207AC_CHECK_HEADERS(sys/sysinfo.h) 208GLIBCXX_CHECK_GET_NPROCS 209AC_CHECK_HEADERS(unistd.h) 210GLIBCXX_CHECK_SC_NPROCESSORS_ONLN 211GLIBCXX_CHECK_SC_NPROC_ONLN 212GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP 213GLIBCXX_CHECK_SYSCTL_HW_NCPU 214GLIBCXX_CHECK_SDT_H 215 216# Check for available headers. 217AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \ 218locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \ 219strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \ 220sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \ 221wchar.h wctype.h]) 222 223# Only do link tests if native. Else, hardcode. 224if $GLIBCXX_IS_NATIVE; then 225 226 # We can do more elaborate tests that assume a working linker. 227 CANADIAN=no 228 229 GLIBCXX_CHECK_LINKER_FEATURES 230 GLIBCXX_CHECK_MATH_SUPPORT 231 GLIBCXX_CHECK_STDLIB_SUPPORT 232 233 # For /dev/random and /dev/urandom for TR1. 234 GLIBCXX_CHECK_RANDOM_TR1 235 236 # For TLS support. 237 GCC_CHECK_TLS 238 239 AC_CHECK_FUNCS(__cxa_thread_atexit_impl) 240 241 # For iconv support. 242 AM_ICONV 243 244else 245 246 # This lets us hard-code the functionality we know we'll have in the cross 247 # target environment. "Let" is a sugar-coated word placed on an especially 248 # dull and tedious hack, actually. 249 # 250 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros 251 # that involve linking, can't be used: 252 # "cannot open sim-crt0.o" 253 # "cannot open crt0.o" 254 # etc. All this is because there currently exists no unified, consistent 255 # way for top level CC information to be passed down to target directories: 256 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc. 257 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for 258 # crosses can be removed. 259 260 # If Canadian cross, then don't pick up tools from the build directory. 261 # Used only in GLIBCXX_EXPORT_INCLUDES. 262 if test -n "$with_cross_host" && 263 test x"$build_alias" != x"$with_cross_host" && 264 test x"$build" != x"$target"; 265 then 266 CANADIAN=yes 267 else 268 CANADIAN=no 269 fi 270 271 # Construct crosses by hand, eliminating bits that need ld... 272 # GLIBCXX_CHECK_MATH_SUPPORT 273 274 # First, test for "known" system libraries. We may be using newlib even 275 # on a hosted environment. 276 if test "x${with_newlib}" = "xyes"; then 277 os_include_dir="os/newlib" 278 AC_DEFINE(HAVE_HYPOT) 279 280 # GLIBCXX_CHECK_STDLIB_SUPPORT 281 AC_DEFINE(HAVE_STRTOF) 282 283 AC_DEFINE(HAVE_ACOSF) 284 AC_DEFINE(HAVE_ASINF) 285 AC_DEFINE(HAVE_ATAN2F) 286 AC_DEFINE(HAVE_ATANF) 287 AC_DEFINE(HAVE_CEILF) 288 AC_DEFINE(HAVE_COSF) 289 AC_DEFINE(HAVE_COSHF) 290 AC_DEFINE(HAVE_EXPF) 291 AC_DEFINE(HAVE_FABSF) 292 AC_DEFINE(HAVE_FLOORF) 293 AC_DEFINE(HAVE_FMODF) 294 AC_DEFINE(HAVE_FREXPF) 295 AC_DEFINE(HAVE_LDEXPF) 296 AC_DEFINE(HAVE_LOG10F) 297 AC_DEFINE(HAVE_LOGF) 298 AC_DEFINE(HAVE_MODFF) 299 AC_DEFINE(HAVE_POWF) 300 AC_DEFINE(HAVE_SINF) 301 AC_DEFINE(HAVE_SINHF) 302 AC_DEFINE(HAVE_SQRTF) 303 AC_DEFINE(HAVE_TANF) 304 AC_DEFINE(HAVE_TANHF) 305 306 AC_DEFINE(HAVE_ICONV) 307 else 308 GLIBCXX_CROSSCONFIG 309 fi 310 311 # At some point, we should differentiate between architectures 312 # like x86, which have long double versions, and alpha/powerpc/etc., 313 # which don't. For the time being, punt. 314 if test x"long_double_math_on_this_cpu" = x"yes"; then 315 AC_DEFINE(HAVE_ACOSL) 316 AC_DEFINE(HAVE_ASINL) 317 AC_DEFINE(HAVE_ATAN2L) 318 AC_DEFINE(HAVE_ATANL) 319 AC_DEFINE(HAVE_CEILL) 320 AC_DEFINE(HAVE_COSL) 321 AC_DEFINE(HAVE_COSHL) 322 AC_DEFINE(HAVE_EXPL) 323 AC_DEFINE(HAVE_FABSL) 324 AC_DEFINE(HAVE_FLOORL) 325 AC_DEFINE(HAVE_FMODL) 326 AC_DEFINE(HAVE_FREXPL) 327 AC_DEFINE(HAVE_LDEXPL) 328 AC_DEFINE(HAVE_LOG10L) 329 AC_DEFINE(HAVE_LOGL) 330 AC_DEFINE(HAVE_MODFL) 331 AC_DEFINE(HAVE_POWL) 332 AC_DEFINE(HAVE_SINCOSL) 333 AC_DEFINE(HAVE_SINL) 334 AC_DEFINE(HAVE_SINHL) 335 AC_DEFINE(HAVE_SQRTL) 336 AC_DEFINE(HAVE_TANL) 337 AC_DEFINE(HAVE_TANHL) 338 fi 339fi 340 341# Check for _Unwind_GetIPInfo. 342GCC_CHECK_UNWIND_GETIPINFO 343 344GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])]) 345 346GCC_HEADER_STDINT(include/gstdint.h) 347 348GLIBCXX_ENABLE_SYMVERS([yes]) 349AC_SUBST(libtool_VERSION) 350 351GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY([yes]) 352 353ac_ldbl_compat=no 354case "$target" in 355 powerpc*-*-linux* | \ 356 sparc*-*-linux* | \ 357 s390*-*-linux* | \ 358 alpha*-*-linux*) 359 AC_TRY_COMPILE(, [ 360#if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__)) 361#error no need for long double compatibility 362#endif 363 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no]) 364 if test "$ac_ldbl_compat" = yes; then 365 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1, 366 [Define if compatibility should be provided for -mlong-double-64.]) 367 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver" 368 fi 369esac 370GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes) 371 372# Check if assembler supports disabling hardware capability support. 373GLIBCXX_CHECK_ASSEMBLER_HWCAP 374 375# Check if assembler supports rdrand opcode. 376GLIBCXX_CHECK_X86_RDRAND 377 378# This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE. 379GLIBCXX_CONFIGURE_TESTSUITE 380 381# For gthread support. Depends on GLIBCXX_ENABLE_SYMVERS. 382GLIBCXX_CHECK_GTHREADS 383 384# Define documentation rules conditionally. 385 386# See if makeinfo has been installed and is modern enough 387# that we can use it. 388ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version], 389 [GNU texinfo.* \([0-9][0-9.]*\)], 390 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*]) 391AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") 392 393# Check for doxygen 394AC_CHECK_PROG([DOXYGEN], doxygen, yes, no) 395AC_CHECK_PROG([DOT], dot, yes, no) 396 397# Check for docbook 398AC_CHECK_PROG([XSLTPROC], xsltproc, yes, no) 399AC_CHECK_PROG([XMLLINT], xmllint, yes, no) 400GLIBCXX_CONFIGURE_DOCBOOK 401 402# Check for xml/html dependencies. 403AM_CONDITIONAL(BUILD_XML, 404 test $ac_cv_prog_DOXYGEN = "yes" && 405 test $ac_cv_prog_DOT = "yes" && 406 test $ac_cv_prog_XSLTPROC = "yes" && 407 test $ac_cv_prog_XMLLINT = "yes" && 408 test $glibcxx_stylesheets = "yes") 409 410AM_CONDITIONAL(BUILD_HTML, 411 test $ac_cv_prog_DOXYGEN = "yes" && 412 test $ac_cv_prog_DOT = "yes" && 413 test $ac_cv_prog_XSLTPROC = "yes" && 414 test $ac_cv_prog_XMLLINT = "yes" && 415 test $glibcxx_stylesheets = "yes") 416 417# Check for man dependencies. 418AM_CONDITIONAL(BUILD_MAN, 419 test $ac_cv_prog_DOXYGEN = "yes" && 420 test $ac_cv_prog_DOT = "yes") 421 422# Check for pdf dependencies. 423AC_CHECK_PROG([DBLATEX], dblatex, yes, no) 424AC_CHECK_PROG([PDFLATEX], pdflatex, yes, no) 425AM_CONDITIONAL(BUILD_PDF, 426 test $ac_cv_prog_DBLATEX = "yes" && 427 test $ac_cv_prog_PDFLATEX = "yes") 428 429 430# Propagate the target-specific source directories through the build chain. 431ATOMICITY_SRCDIR=config/${atomicity_dir} 432ATOMIC_WORD_SRCDIR=config/${atomic_word_dir} 433ATOMIC_FLAGS=${atomic_flags} 434CPU_DEFINES_SRCDIR=config/${cpu_defines_dir} 435OS_INC_SRCDIR=config/${os_include_dir} 436ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir} 437ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir} 438CPU_OPT_EXT_RANDOM=config/${cpu_opt_ext_random} 439CPU_OPT_BITS_RANDOM=config/${cpu_opt_bits_random} 440AC_SUBST(ATOMICITY_SRCDIR) 441AC_SUBST(ATOMIC_WORD_SRCDIR) 442AC_SUBST(ATOMIC_FLAGS) 443AC_SUBST(CPU_DEFINES_SRCDIR) 444AC_SUBST(ABI_TWEAKS_SRCDIR) 445AC_SUBST(OS_INC_SRCDIR) 446AC_SUBST(ERROR_CONSTANTS_SRCDIR) 447AC_SUBST(CPU_OPT_EXT_RANDOM) 448AC_SUBST(CPU_OPT_BITS_RANDOM) 449 450 451# Determine cross-compile flags and AM_CONDITIONALs. 452#AC_SUBST(GLIBCXX_IS_NATIVE) 453#AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes) 454GLIBCXX_EVALUATE_CONDITIONALS 455 456AC_CACHE_SAVE 457 458if test ${multilib} = yes; then 459 multilib_arg="--enable-multilib" 460else 461 multilib_arg= 462fi 463 464# Export all the install information. 465GLIBCXX_EXPORT_INSTALL_INFO 466 467# Export all the include and flag information to Makefiles. 468GLIBCXX_EXPORT_INCLUDES 469GLIBCXX_EXPORT_FLAGS 470 471dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros, 472dnl which can all be called multiple times as needed, plus one (different) 473dnl AC_OUTPUT macro. This one lists the files to be created: 474AC_CONFIG_FILES(Makefile) 475AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags]) 476AC_CONFIG_FILES([scripts/extract_symvers],[chmod +x scripts/extract_symvers]) 477AC_CONFIG_FILES([doc/xsl/customization.xsl]) 478 479# Multilibs need MULTISUBDIR defined correctly in certain makefiles so 480# that multilib installs will end up installed in the correct place. 481# The testsuite needs it for multilib-aware ABI baseline files. 482# To work around this not being passed down from config-ml.in -> 483# srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually 484# append it here. Only modify Makefiles that have just been created. 485# 486# Also, get rid of this simulated-VPATH thing that automake does. 487AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]), 488 [cat > vpsed$$ << \_EOF 489s!`test -f '$<' || echo '$(srcdir)/'`!! 490_EOF 491 sed -f vpsed$$ $ac_file > tmp$$ 492 mv tmp$$ $ac_file 493 rm vpsed$$ 494 echo 'MULTISUBDIR =' >> $ac_file 495 ml_norecursion=yes 496 . ${multi_basedir}/config-ml.in 497 AS_UNSET([ml_norecursion]) 498]) 499 500AC_CONFIG_COMMANDS([generate-headers], 501 [(cd include && ${MAKE-make} pch_build= )]) 502 503dnl And this actually makes things happen: 504AC_OUTPUT 505