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 *-*-netbsd*,*-*-netbsd*) 42 GLIBCXX_IS_NATIVE=true 43 ;; 44 # Darwin crosses can use the host system's libraries and headers, 45 # because of the fat library support. Of course, it must be the 46 # same version of Darwin on both sides. Allow the user to 47 # just say --target=foo-darwin without a version number to mean 48 # "the version on this system". 49 *-*-darwin*,*-*-darwin*) 50 hostos=`echo $host | sed 's/.*-darwin/darwin/'` 51 targetos=`echo $target | sed 's/.*-darwin/darwin/'` 52 if test $hostos = $targetos -o $targetos = darwin ; then 53 GLIBCXX_IS_NATIVE=true 54 fi 55 ;; 56 57 *) 58 GCC_NO_EXECUTABLES 59 ;; 60 esac 61else 62 GLIBCXX_IS_NATIVE=true 63fi 64 65# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the 66# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. 67# 1.x: minimum required version 68# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch 69# of other PACKAGE_* variables will, however, and there's nothing 70# we can do about that; they come from AC_INIT). 71# foreign: we don't follow the normal rules for GNU packages (no COPYING 72# file in the top srcdir, etc, etc), so stop complaining. 73# no-dependencies: turns off auto dependency generation (just for now) 74# no-dist: we don't want 'dist' and related rules. 75# -Wall: turns on all automake warnings... 76# -Wno-portability: ...except this one, since GNU make is now required. 77AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies no-dist -Wall -Wno-portability -Wno-override]) 78AH_TEMPLATE(PACKAGE, [Name of package]) 79AH_TEMPLATE(VERSION, [Version number of package]) 80 81# -fno-builtin must be present here so that a non-conflicting form of 82# std::exit can be guessed by AC_PROG_CXX, and used in later tests. 83 84save_CXXFLAGS="$CXXFLAGS" 85CXXFLAGS="$CXXFLAGS -fno-builtin" 86AC_PROG_CC 87AC_PROG_CXX 88CXXFLAGS="$save_CXXFLAGS" 89 90# Runs configure.host, and assorted other critical bits. Sets 91# up critical shell variables. 92GLIBCXX_CONFIGURE 93 94# Libtool setup. 95if test "x${with_newlib}" != "xyes"; then 96 AC_LIBTOOL_DLOPEN 97fi 98AM_PROG_LIBTOOL 99ACX_LT_HOST_FLAGS 100AC_SUBST(enable_shared) 101AC_SUBST(enable_static) 102 103# libtool variables for C++ shared and position-independent compiles. 104# 105# Use glibcxx_lt_pic_flag to designate the automake variable 106# used to encapsulate the default libtool approach to creating objects 107# with position-independent code. Default: -prefer-pic. 108# 109# Use glibcxx_compiler_shared_flag to designate a compile-time flags for 110# creating shared objects. Default: -D_GLIBCXX_SHARED. 111# 112# Use glibcxx_compiler_pic_flag to designate a compile-time flags for 113# creating position-independent objects. This varies with the target 114# hardware and operating system, but is often: -DPIC -fPIC. 115if test "$enable_shared" = yes; then 116 glibcxx_lt_pic_flag="-prefer-pic" 117 glibcxx_compiler_pic_flag="$lt_prog_compiler_pic_CXX" 118 glibcxx_compiler_shared_flag="-D_GLIBCXX_SHARED" 119 120else 121 glibcxx_lt_pic_flag= 122 glibcxx_compiler_pic_flag= 123 glibcxx_compiler_shared_flag= 124fi 125AC_SUBST(glibcxx_lt_pic_flag) 126AC_SUBST(glibcxx_compiler_pic_flag) 127AC_SUBST(glibcxx_compiler_shared_flag) 128 129# Override the libtool's pic_flag and pic_mode. 130# Do this step after AM_PROG_LIBTOOL, but before AC_OUTPUT. 131# NB: this impacts --with-pic and --without-pic. 132lt_prog_compiler_pic_CXX="$glibcxx_compiler_pic_flag $glibcxx_compiler_shared_flag" 133pic_mode='default' 134 135# Eliminate -lstdc++ addition to postdeps for cross compiles. 136postdeps_CXX=`echo " $postdeps_CXX " | sed 's, -lstdc++ ,,g'` 137 138# Possibly disable most of the library. 139## TODO: Consider skipping unncessary tests altogether in this case, rather 140## than just ignoring the results. Faster /and/ more correct, win win. 141GLIBCXX_ENABLE_HOSTED 142 143# Enable descriptive messages to standard output on termination. 144GLIBCXX_ENABLE_VERBOSE 145 146# Enable compiler support that doesn't require linking. 147GLIBCXX_ENABLE_SJLJ_EXCEPTIONS 148GLIBCXX_ENABLE_PCH($is_hosted) 149GLIBCXX_ENABLE_THREADS 150GLIBCXX_ENABLE_ATOMIC_BUILTINS 151GLIBCXX_ENABLE_DECIMAL_FLOAT 152GLIBCXX_ENABLE_INT128_FLOAT128 153 154# Checks for compiler support that doesn't require linking. 155GLIBCXX_CHECK_COMPILER_FEATURES 156 157# Enable all the variable C++ runtime options that don't require linking. 158GLIBCXX_ENABLE_CSTDIO 159GLIBCXX_ENABLE_CLOCALE 160GLIBCXX_ENABLE_ALLOCATOR 161GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host 162GLIBCXX_ENABLE_LONG_LONG([yes]) 163GLIBCXX_ENABLE_WCHAR_T([yes]) 164GLIBCXX_ENABLE_C99([yes]) 165GLIBCXX_ENABLE_CONCEPT_CHECKS([no]) 166GLIBCXX_ENABLE_DEBUG_FLAGS(["-gdwarf-4 -g3 -O0"]) 167GLIBCXX_ENABLE_DEBUG([no]) 168GLIBCXX_ENABLE_PARALLEL([yes]) 169GLIBCXX_ENABLE_CXX_FLAGS 170GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no]) 171GLIBCXX_ENABLE_EXTERN_TEMPLATE([yes]) 172GLIBCXX_ENABLE_PYTHON 173GLIBCXX_ENABLE_WERROR([yes]) 174 175# Checks for operating systems support that doesn't require linking. 176GLIBCXX_CHECK_STDIO_PROTO 177GLIBCXX_CHECK_SYSTEM_ERROR 178 179# For the streamoff typedef. 180GLIBCXX_CHECK_INT64_T 181 182# For LFS support. 183GLIBCXX_CHECK_LFS 184 185# For showmanyc_helper(). 186AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h) 187GLIBCXX_CHECK_POLL 188GLIBCXX_CHECK_S_ISREG_OR_S_IFREG 189 190# For xsputn_2(). 191AC_CHECK_HEADERS(sys/uio.h) 192GLIBCXX_CHECK_WRITEV 193 194# For C99 support to TR1. 195GLIBCXX_CHECK_C99_TR1 196 197# For the EOF, SEEK_CUR, and SEEK_END integer constants. 198GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS 199 200# For gettimeofday support. 201GLIBCXX_CHECK_GETTIMEOFDAY 202 203# For clock_gettime, nanosleep and sched_yield support. 204# NB: The default is [no], because otherwise it requires linking. 205GLIBCXX_ENABLE_LIBSTDCXX_TIME([no]) 206 207AC_LC_MESSAGES 208 209# For hardware_concurrency 210AC_CHECK_HEADERS(sys/sysinfo.h) 211GLIBCXX_CHECK_GET_NPROCS 212AC_CHECK_HEADERS(unistd.h) 213GLIBCXX_CHECK_SC_NPROCESSORS_ONLN 214GLIBCXX_CHECK_SC_NPROC_ONLN 215GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP 216GLIBCXX_CHECK_SYSCTL_HW_NCPU 217GLIBCXX_CHECK_SDT_H 218 219# Check for available headers. 220AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \ 221locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \ 222strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \ 223sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \ 224wchar.h wctype.h]) 225 226# Only do link tests if native. Else, hardcode. 227if $GLIBCXX_IS_NATIVE; then 228 229 # We can do more elaborate tests that assume a working linker. 230 CANADIAN=no 231 232 GLIBCXX_CHECK_LINKER_FEATURES 233 GLIBCXX_CHECK_MATH_SUPPORT 234 GLIBCXX_CHECK_STDLIB_SUPPORT 235 236 # For /dev/random and /dev/urandom for TR1. 237 GLIBCXX_CHECK_RANDOM_TR1 238 239 # For TLS support. 240 GCC_CHECK_TLS 241 242 AC_CHECK_FUNCS(__cxa_thread_atexit_impl) 243 244 # For iconv support. 245 AM_ICONV 246 247else 248 249 # This lets us hard-code the functionality we know we'll have in the cross 250 # target environment. "Let" is a sugar-coated word placed on an especially 251 # dull and tedious hack, actually. 252 # 253 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros 254 # that involve linking, can't be used: 255 # "cannot open sim-crt0.o" 256 # "cannot open crt0.o" 257 # etc. All this is because there currently exists no unified, consistent 258 # way for top level CC information to be passed down to target directories: 259 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc. 260 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for 261 # crosses can be removed. 262 263 # If Canadian cross, then don't pick up tools from the build directory. 264 # Used only in GLIBCXX_EXPORT_INCLUDES. 265 if test -n "$with_cross_host" && 266 test x"$build_alias" != x"$with_cross_host" && 267 test x"$build" != x"$target"; 268 then 269 CANADIAN=yes 270 else 271 CANADIAN=no 272 fi 273 274 # Construct crosses by hand, eliminating bits that need ld... 275 # GLIBCXX_CHECK_MATH_SUPPORT 276 277 # First, test for "known" system libraries. We may be using newlib even 278 # on a hosted environment. 279 if test "x${with_newlib}" = "xyes"; then 280 os_include_dir="os/newlib" 281 AC_DEFINE(HAVE_HYPOT) 282 283 # GLIBCXX_CHECK_STDLIB_SUPPORT 284 AC_DEFINE(HAVE_STRTOF) 285 286 AC_DEFINE(HAVE_ACOSF) 287 AC_DEFINE(HAVE_ASINF) 288 AC_DEFINE(HAVE_ATAN2F) 289 AC_DEFINE(HAVE_ATANF) 290 AC_DEFINE(HAVE_CEILF) 291 AC_DEFINE(HAVE_COSF) 292 AC_DEFINE(HAVE_COSHF) 293 AC_DEFINE(HAVE_EXPF) 294 AC_DEFINE(HAVE_FABSF) 295 AC_DEFINE(HAVE_FLOORF) 296 AC_DEFINE(HAVE_FMODF) 297 AC_DEFINE(HAVE_FREXPF) 298 AC_DEFINE(HAVE_LDEXPF) 299 AC_DEFINE(HAVE_LOG10F) 300 AC_DEFINE(HAVE_LOGF) 301 AC_DEFINE(HAVE_MODFF) 302 AC_DEFINE(HAVE_POWF) 303 AC_DEFINE(HAVE_SINF) 304 AC_DEFINE(HAVE_SINHF) 305 AC_DEFINE(HAVE_SQRTF) 306 AC_DEFINE(HAVE_TANF) 307 AC_DEFINE(HAVE_TANHF) 308 309 AC_DEFINE(HAVE_ICONV) 310 else 311 GLIBCXX_CROSSCONFIG 312 fi 313 314 # At some point, we should differentiate between architectures 315 # like x86, which have long double versions, and alpha/powerpc/etc., 316 # which don't. For the time being, punt. 317 if test x"long_double_math_on_this_cpu" = x"yes"; then 318 AC_DEFINE(HAVE_ACOSL) 319 AC_DEFINE(HAVE_ASINL) 320 AC_DEFINE(HAVE_ATAN2L) 321 AC_DEFINE(HAVE_ATANL) 322 AC_DEFINE(HAVE_CEILL) 323 AC_DEFINE(HAVE_COSL) 324 AC_DEFINE(HAVE_COSHL) 325 AC_DEFINE(HAVE_EXPL) 326 AC_DEFINE(HAVE_FABSL) 327 AC_DEFINE(HAVE_FLOORL) 328 AC_DEFINE(HAVE_FMODL) 329 AC_DEFINE(HAVE_FREXPL) 330 AC_DEFINE(HAVE_LDEXPL) 331 AC_DEFINE(HAVE_LOG10L) 332 AC_DEFINE(HAVE_LOGL) 333 AC_DEFINE(HAVE_MODFL) 334 AC_DEFINE(HAVE_POWL) 335 AC_DEFINE(HAVE_SINCOSL) 336 AC_DEFINE(HAVE_SINL) 337 AC_DEFINE(HAVE_SINHL) 338 AC_DEFINE(HAVE_SQRTL) 339 AC_DEFINE(HAVE_TANL) 340 AC_DEFINE(HAVE_TANHL) 341 fi 342fi 343 344# Check for _Unwind_GetIPInfo. 345GCC_CHECK_UNWIND_GETIPINFO 346 347GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])]) 348 349GCC_HEADER_STDINT(include/gstdint.h) 350 351GLIBCXX_ENABLE_SYMVERS([yes]) 352AC_SUBST(libtool_VERSION) 353 354GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY([yes]) 355 356ac_ldbl_compat=no 357case "$target" in 358 powerpc*-*-linux* | \ 359 sparc*-*-linux* | \ 360 s390*-*-linux* | \ 361 alpha*-*-linux*) 362 AC_TRY_COMPILE(, [ 363#if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__)) 364#error no need for long double compatibility 365#endif 366 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no]) 367 if test "$ac_ldbl_compat" = yes; then 368 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1, 369 [Define if compatibility should be provided for -mlong-double-64.]) 370 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver" 371 fi 372esac 373GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes) 374 375# Check if assembler supports disabling hardware capability support. 376GLIBCXX_CHECK_ASSEMBLER_HWCAP 377 378# Check if assembler supports rdrand opcode. 379GLIBCXX_CHECK_X86_RDRAND 380 381# This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE. 382GLIBCXX_CONFIGURE_TESTSUITE 383 384# For gthread support. Depends on GLIBCXX_ENABLE_SYMVERS. 385GLIBCXX_CHECK_GTHREADS 386 387# Define documentation rules conditionally. 388 389# See if makeinfo has been installed and is modern enough 390# that we can use it. 391ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version], 392 [GNU texinfo.* \([0-9][0-9.]*\)], 393 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*]) 394AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") 395 396# Check for doxygen 397AC_CHECK_PROG([DOXYGEN], doxygen, yes, no) 398AC_CHECK_PROG([DOT], dot, yes, no) 399 400# Check for docbook 401AC_CHECK_PROG([XSLTPROC], xsltproc, yes, no) 402AC_CHECK_PROG([XMLLINT], xmllint, yes, no) 403GLIBCXX_CONFIGURE_DOCBOOK 404 405# Check for xml/html dependencies. 406AM_CONDITIONAL(BUILD_XML, 407 test $ac_cv_prog_DOXYGEN = "yes" && 408 test $ac_cv_prog_DOT = "yes" && 409 test $ac_cv_prog_XSLTPROC = "yes" && 410 test $ac_cv_prog_XMLLINT = "yes" && 411 test $glibcxx_stylesheets = "yes") 412 413AM_CONDITIONAL(BUILD_HTML, 414 test $ac_cv_prog_DOXYGEN = "yes" && 415 test $ac_cv_prog_DOT = "yes" && 416 test $ac_cv_prog_XSLTPROC = "yes" && 417 test $ac_cv_prog_XMLLINT = "yes" && 418 test $glibcxx_stylesheets = "yes") 419 420# Check for man dependencies. 421AM_CONDITIONAL(BUILD_MAN, 422 test $ac_cv_prog_DOXYGEN = "yes" && 423 test $ac_cv_prog_DOT = "yes") 424 425# Check for pdf dependencies. 426AC_CHECK_PROG([DBLATEX], dblatex, yes, no) 427AC_CHECK_PROG([PDFLATEX], pdflatex, yes, no) 428AM_CONDITIONAL(BUILD_PDF, 429 test $ac_cv_prog_DBLATEX = "yes" && 430 test $ac_cv_prog_PDFLATEX = "yes") 431 432 433# Propagate the target-specific source directories through the build chain. 434ATOMICITY_SRCDIR=config/${atomicity_dir} 435ATOMIC_WORD_SRCDIR=config/${atomic_word_dir} 436ATOMIC_FLAGS=${atomic_flags} 437CPU_DEFINES_SRCDIR=config/${cpu_defines_dir} 438OS_INC_SRCDIR=config/${os_include_dir} 439ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir} 440ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir} 441CPU_OPT_EXT_RANDOM=config/${cpu_opt_ext_random} 442CPU_OPT_BITS_RANDOM=config/${cpu_opt_bits_random} 443AC_SUBST(ATOMICITY_SRCDIR) 444AC_SUBST(ATOMIC_WORD_SRCDIR) 445AC_SUBST(ATOMIC_FLAGS) 446AC_SUBST(CPU_DEFINES_SRCDIR) 447AC_SUBST(ABI_TWEAKS_SRCDIR) 448AC_SUBST(OS_INC_SRCDIR) 449AC_SUBST(ERROR_CONSTANTS_SRCDIR) 450AC_SUBST(CPU_OPT_EXT_RANDOM) 451AC_SUBST(CPU_OPT_BITS_RANDOM) 452 453 454# Determine cross-compile flags and AM_CONDITIONALs. 455#AC_SUBST(GLIBCXX_IS_NATIVE) 456#AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes) 457GLIBCXX_EVALUATE_CONDITIONALS 458 459AC_CACHE_SAVE 460 461if test ${multilib} = yes; then 462 multilib_arg="--enable-multilib" 463else 464 multilib_arg= 465fi 466 467# Export all the install information. 468GLIBCXX_EXPORT_INSTALL_INFO 469 470# Export all the include and flag information to Makefiles. 471GLIBCXX_EXPORT_INCLUDES 472GLIBCXX_EXPORT_FLAGS 473 474dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros, 475dnl which can all be called multiple times as needed, plus one (different) 476dnl AC_OUTPUT macro. This one lists the files to be created: 477AC_CONFIG_FILES(Makefile) 478AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags]) 479AC_CONFIG_FILES([scripts/extract_symvers],[chmod +x scripts/extract_symvers]) 480AC_CONFIG_FILES([doc/xsl/customization.xsl]) 481 482# Multilibs need MULTISUBDIR defined correctly in certain makefiles so 483# that multilib installs will end up installed in the correct place. 484# The testsuite needs it for multilib-aware ABI baseline files. 485# To work around this not being passed down from config-ml.in -> 486# srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually 487# append it here. Only modify Makefiles that have just been created. 488# 489# Also, get rid of this simulated-VPATH thing that automake does. 490AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]), 491 [cat > vpsed$$ << \_EOF 492s!`test -f '$<' || echo '$(srcdir)/'`!! 493_EOF 494 sed -f vpsed$$ $ac_file > tmp$$ 495 mv tmp$$ $ac_file 496 rm vpsed$$ 497 echo 'MULTISUBDIR =' >> $ac_file 498 ml_norecursion=yes 499 . ${multi_basedir}/config-ml.in 500 AS_UNSET([ml_norecursion]) 501]) 502 503AC_CONFIG_COMMANDS([generate-headers], 504 [(cd include && ${MAKE-make} pch_build= )]) 505 506dnl And this actually makes things happen: 507AC_OUTPUT 508