1 # Process this file with autoreconf to produce a configure script.
3 AC_INIT(package-unused, version-unused,, libstdc++)
4 AC_CONFIG_SRCDIR(src/shared/hashtable-aux.cc)
5 AC_CONFIG_HEADER(config.h)
7 # This works around the fact that libtool configuration may change LD
8 # for this particular configuration, but some shells, instead of
9 # keeping the changes in LD private, export them just because LD is
10 # exported. Only used at the end of this file.
11 ### am handles this now? ORIGINAL_LD_FOR_MULTILIBS=$LD
13 # Find the rest of the source tree framework.
14 AM_ENABLE_MULTILIB(, ..)
16 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
18 # You will slowly go insane if you do not grok the following fact: when
19 # building v3 as part of the compiler, the top-level /target/ becomes the
20 # library's /host/. configure then causes --target to default to --host,
21 # exactly like any other package using autoconf. Therefore, 'target' and
22 # 'host' will always be the same. This makes sense both for native and
23 # cross compilers, just think about it for a little while. :-)
25 # Also, if v3 is being configured as part of a cross compiler, the top-level
26 # configure script will pass the "real" host as $with_cross_host.
28 # Do not delete or change the following two lines. For why, see
29 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
31 target_alias=${target_alias-$host_alias}
33 # Handy for debugging:
34 #AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5
36 if test "$build" != "$host"; then
37 # We are being configured with some form of cross compiler.
38 GLIBCXX_IS_NATIVE=false
39 case "$host","$target" in
40 # Darwin crosses can use the host system's libraries and headers,
41 # because of the fat library support. Of course, it must be the
42 # same version of Darwin on both sides. Allow the user to
43 # just say --target=foo-darwin without a version number to mean
44 # "the version on this system".
45 *-*-darwin*,*-*-darwin*)
46 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
47 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
48 if test $hostos = $targetos -o $targetos = darwin ; then
49 GLIBCXX_IS_NATIVE=true
58 GLIBCXX_IS_NATIVE=true
61 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
62 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
63 # 1.x: minimum required version
64 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
65 # of other PACKAGE_* variables will, however, and there's nothing
66 # we can do about that; they come from AC_INIT).
67 # foreign: we don't follow the normal rules for GNU packages (no COPYING
68 # file in the top srcdir, etc, etc), so stop complaining.
69 # no-dependencies: turns off auto dependency generation (just for now)
70 # no-dist: we don't want 'dist' and related rules.
71 # -Wall: turns on all automake warnings...
72 # -Wno-portability: ...except this one, since GNU make is now required.
73 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies no-dist -Wall -Wno-portability -Wno-override])
74 AH_TEMPLATE(PACKAGE, [Name of package])
75 AH_TEMPLATE(VERSION, [Version number of package])
77 # -fno-builtin must be present here so that a non-conflicting form of
78 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
80 save_CXXFLAGS="$CXXFLAGS"
81 CXXFLAGS="$CXXFLAGS -fno-builtin"
84 CXXFLAGS="$save_CXXFLAGS"
86 # Runs configure.host, and assorted other critical bits. Sets
87 # up critical shell variables.
91 if test "x${with_newlib}" != "xyes"; then
96 AC_SUBST(enable_shared)
97 AC_SUBST(enable_static)
99 if test "$enable_vtable_verify" = yes; then
100 predep_objects_CXX="${predep_objects_CXX} ${glibcxx_builddir}/../libgcc/vtv_start.o"
101 postdep_objects_CXX="${postdep_objects_CXX} ${glibcxx_builddir}/../libgcc/vtv_end.o"
105 # libtool variables for C++ shared and position-independent compiles.
107 # Use glibcxx_lt_pic_flag to designate the automake variable
108 # used to encapsulate the default libtool approach to creating objects
109 # with position-independent code. Default: -prefer-pic.
111 # Use glibcxx_compiler_shared_flag to designate a compile-time flags for
112 # creating shared objects. Default: -D_GLIBCXX_SHARED.
114 # Use glibcxx_compiler_pic_flag to designate a compile-time flags for
115 # creating position-independent objects. This varies with the target
116 # hardware and operating system, but is often: -DPIC -fPIC.
117 if test "$enable_shared" = yes; then
118 glibcxx_lt_pic_flag="-prefer-pic"
119 glibcxx_compiler_pic_flag="$lt_prog_compiler_pic_CXX"
120 glibcxx_compiler_shared_flag="-D_GLIBCXX_SHARED"
124 glibcxx_compiler_pic_flag=
125 glibcxx_compiler_shared_flag=
127 AC_SUBST(glibcxx_lt_pic_flag)
128 AC_SUBST(glibcxx_compiler_pic_flag)
129 AC_SUBST(glibcxx_compiler_shared_flag)
131 # Override the libtool's pic_flag and pic_mode.
132 # Do this step after AM_PROG_LIBTOOL, but before AC_OUTPUT.
133 # NB: this impacts --with-pic and --without-pic.
134 lt_prog_compiler_pic_CXX="$glibcxx_compiler_pic_flag $glibcxx_compiler_shared_flag"
137 # Eliminate -lstdc++ addition to postdeps for cross compiles.
138 postdeps_CXX=`echo " $postdeps_CXX " | sed 's, -lstdc++ ,,g'`
140 # Possibly disable most of the library.
141 ## TODO: Consider skipping unncessary tests altogether in this case, rather
142 ## than just ignoring the results. Faster /and/ more correct, win win.
143 GLIBCXX_ENABLE_HOSTED
145 # Enable descriptive messages to standard output on termination.
146 GLIBCXX_ENABLE_VERBOSE
148 # Enable compiler support that doesn't require linking.
149 GLIBCXX_ENABLE_PCH($is_hosted)
150 GLIBCXX_ENABLE_THREADS
151 GLIBCXX_ENABLE_ATOMIC_BUILTINS
152 GLIBCXX_ENABLE_LOCK_POLICY
153 GLIBCXX_ENABLE_DECIMAL_FLOAT
154 GLIBCXX_ENABLE_INT128_FLOAT128
155 if test "$enable_float128" = yes; then
156 port_specific_symbol_files="$port_specific_symbol_files \$(top_srcdir)/config/abi/pre/float128.ver"
159 # Checks for compiler support that doesn't require linking.
160 GLIBCXX_CHECK_COMPILER_FEATURES
162 # Enable all the variable C++ runtime options that don't require linking.
163 GLIBCXX_ENABLE_CSTDIO
164 GLIBCXX_ENABLE_CLOCALE
165 GLIBCXX_ENABLE_ALLOCATOR
166 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
167 GLIBCXX_ENABLE_LONG_LONG([yes])
168 GLIBCXX_ENABLE_WCHAR_T([yes])
169 GLIBCXX_ENABLE_C99([yes])
170 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
171 GLIBCXX_ENABLE_DEBUG_FLAGS(["-gdwarf-4 -g3 -O0 -D_GLIBCXX_ASSERTIONS"])
172 GLIBCXX_ENABLE_DEBUG([no])
173 GLIBCXX_ENABLE_PARALLEL([yes])
174 GLIBCXX_ENABLE_CXX_FLAGS
175 GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
176 GLIBCXX_ENABLE_EXTERN_TEMPLATE([yes])
177 GLIBCXX_ENABLE_PYTHON
178 GLIBCXX_ENABLE_WERROR([no])
179 GLIBCXX_ENABLE_VTABLE_VERIFY([no])
181 # Checks for operating systems support that doesn't require linking.
182 GLIBCXX_CHECK_STDIO_PROTO
183 GLIBCXX_CHECK_MATH11_PROTO
184 GLIBCXX_CHECK_SYSTEM_ERROR
185 GLIBCXX_CHECK_UCHAR_H
187 # For the streamoff typedef.
188 GLIBCXX_CHECK_INT64_T
193 # For showmanyc_helper().
194 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
196 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
199 AC_CHECK_HEADERS(sys/uio.h)
202 # Check for fenv.h and complex.h before GLIBCXX_CHECK_C99_TR1
203 # so that the check is done with the C compiler (not C++).
204 # Checking with C++ can break a canadian cross build if either
205 # file does not exist in C but does in C++.
206 AC_CHECK_HEADERS(fenv.h complex.h)
208 # For C99 support to TR1.
209 GLIBCXX_CHECK_C99_TR1
211 # For the EOF, SEEK_CUR, and SEEK_END integer constants.
212 GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS
214 # For gettimeofday support.
215 GLIBCXX_CHECK_GETTIMEOFDAY
217 # For clock_gettime, nanosleep and sched_yield support.
218 GLIBCXX_ENABLE_LIBSTDCXX_TIME
220 # Check for tmpnam which is obsolescent in POSIX.1-2008
223 # For pthread_cond_clockwait
224 GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT
228 # For hardware_concurrency
229 AC_CHECK_HEADERS(sys/sysinfo.h)
230 GLIBCXX_CHECK_GET_NPROCS
231 AC_CHECK_HEADERS(unistd.h)
232 GLIBCXX_CHECK_SC_NPROCESSORS_ONLN
233 GLIBCXX_CHECK_SC_NPROC_ONLN
234 GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP
235 GLIBCXX_CHECK_SYSCTL_HW_NCPU
238 # Check for available headers.
239 AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
240 locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
241 strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \
242 sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
243 wchar.h wctype.h linux/types.h])
245 AC_CHECK_HEADERS([linux/random.h], [], [],
246 [[#ifdef HAVE_LINUX_TYPES_H
247 # include <linux/types.h>
251 # Only do link tests if native. Else, hardcode.
252 if $GLIBCXX_IS_NATIVE; then
254 # We can do more elaborate tests that assume a working linker.
257 GLIBCXX_CHECK_LINKER_FEATURES
258 GLIBCXX_CHECK_MATH_SUPPORT
259 GLIBCXX_CHECK_STDLIB_SUPPORT
261 # For /dev/random and /dev/urandom for std::random_device.
262 GLIBCXX_CHECK_DEV_RANDOM
267 AC_CHECK_FUNCS(__cxa_thread_atexit_impl __cxa_thread_atexit)
268 AC_CHECK_FUNCS(aligned_alloc posix_memalign memalign _aligned_malloc)
269 AC_CHECK_FUNCS(_wfopen)
271 # C11 functions for C++17 library
272 AC_CHECK_FUNCS(timespec_get)
275 AC_CHECK_FUNCS(sockatmark)
282 # This lets us hard-code the functionality we know we'll have in the cross
283 # target environment. "Let" is a sugar-coated word placed on an especially
284 # dull and tedious hack, actually.
286 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
287 # that involve linking, can't be used:
288 # "cannot open sim-crt0.o"
289 # "cannot open crt0.o"
290 # etc. All this is because there currently exists no unified, consistent
291 # way for top level CC information to be passed down to target directories:
292 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
293 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
294 # crosses can be removed.
296 # If Canadian cross, then don't pick up tools from the build directory.
297 # Used only in GLIBCXX_EXPORT_INCLUDES.
298 if test -n "$with_cross_host" &&
299 test x"$build_alias" != x"$with_cross_host" &&
300 test x"$build" != x"$target";
307 # Construct crosses by hand, eliminating bits that need ld...
308 # GLIBCXX_CHECK_MATH_SUPPORT
310 # First, test for "known" system libraries. We may be using newlib even
311 # on a hosted environment.
312 if test "x${with_newlib}" = "xyes"; then
313 os_include_dir="os/newlib"
314 AC_DEFINE(HAVE_HYPOT)
316 # GLIBCXX_CHECK_STDLIB_SUPPORT
317 AC_DEFINE(HAVE_STRTOF)
319 AC_DEFINE(HAVE_ACOSF)
320 AC_DEFINE(HAVE_ASINF)
321 AC_DEFINE(HAVE_ATAN2F)
322 AC_DEFINE(HAVE_ATANF)
323 AC_DEFINE(HAVE_CEILF)
325 AC_DEFINE(HAVE_COSHF)
327 AC_DEFINE(HAVE_FABSF)
328 AC_DEFINE(HAVE_FLOORF)
329 AC_DEFINE(HAVE_FMODF)
330 AC_DEFINE(HAVE_FREXPF)
331 AC_DEFINE(HAVE_LDEXPF)
332 AC_DEFINE(HAVE_LOG10F)
334 AC_DEFINE(HAVE_MODFF)
337 AC_DEFINE(HAVE_SINHF)
338 AC_DEFINE(HAVE_SQRTF)
340 AC_DEFINE(HAVE_TANHF)
342 AC_DEFINE(HAVE_ICONV)
343 AC_DEFINE(HAVE_MEMALIGN)
348 # At some point, we should differentiate between architectures
349 # like x86, which have long double versions, and alpha/powerpc/etc.,
350 # which don't. For the time being, punt.
351 if test x"long_double_math_on_this_cpu" = x"yes"; then
352 AC_DEFINE(HAVE_ACOSL)
353 AC_DEFINE(HAVE_ASINL)
354 AC_DEFINE(HAVE_ATAN2L)
355 AC_DEFINE(HAVE_ATANL)
356 AC_DEFINE(HAVE_CEILL)
358 AC_DEFINE(HAVE_COSHL)
360 AC_DEFINE(HAVE_FABSL)
361 AC_DEFINE(HAVE_FLOORL)
362 AC_DEFINE(HAVE_FMODL)
363 AC_DEFINE(HAVE_FREXPL)
364 AC_DEFINE(HAVE_LDEXPL)
365 AC_DEFINE(HAVE_LOG10L)
367 AC_DEFINE(HAVE_MODFL)
369 AC_DEFINE(HAVE_SINCOSL)
371 AC_DEFINE(HAVE_SINHL)
372 AC_DEFINE(HAVE_SQRTL)
374 AC_DEFINE(HAVE_TANHL)
378 # Check for _Unwind_GetIPInfo.
379 GCC_CHECK_UNWIND_GETIPINFO
381 GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])
383 GCC_HEADER_STDINT(include/gstdint.h)
385 GLIBCXX_ENABLE_SYMVERS([yes])
386 AC_SUBST(libtool_VERSION)
388 GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY([yes])
390 GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI([yes])
394 LONG_DOUBLE_COMPAT_FLAGS="-mlong-double-64"
396 powerpc*-*-linux* | \
401 #if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__))
402 #error no need for long double compatibility
404 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])
405 if test "$ac_ldbl_compat" = yes; then
406 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1,
407 [Define if compatibility should be provided for -mlong-double-64.])
408 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
411 LONG_DOUBLE_COMPAT_FLAGS="$LONG_DOUBLE_COMPAT_FLAGS -mno-gnu-attribute" ;;
415 AC_SUBST(LONG_DOUBLE_COMPAT_FLAGS)
416 GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes)
418 # Check if assembler supports disabling hardware capability support.
419 GCC_CHECK_ASSEMBLER_HWCAP
421 # Check if assembler supports rdrand opcode.
422 GLIBCXX_CHECK_X86_RDRAND
423 # Check if assembler supports rdseed opcode.
424 GLIBCXX_CHECK_X86_RDSEED
426 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
427 GLIBCXX_CONFIGURE_TESTSUITE
429 # For gthread support. Depends on GLIBCXX_ENABLE_SYMVERS.
430 GLIBCXX_CHECK_GTHREADS
433 AC_CHECK_HEADERS([fcntl.h dirent.h sys/statvfs.h utime.h])
434 GLIBCXX_ENABLE_FILESYSTEM_TS
435 GLIBCXX_CHECK_FILESYSTEM_DEPS
438 AC_CHECK_HEADERS([fcntl.h sys/ioctl.h sys/socket.h sys/uio.h poll.h netdb.h arpa/inet.h netinet/in.h netinet/tcp.h])
440 # For Transactional Memory TS
441 GLIBCXX_CHECK_SIZE_T_MANGLING
443 # Check which release added std::exception_ptr for the target
444 GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER
446 # Define documentation rules conditionally.
448 # See if makeinfo has been installed and is modern enough
449 # that we can use it.
450 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
451 [GNU texinfo.* \([0-9][0-9.]*\)],
452 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
453 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
456 AC_CHECK_PROG([DOXYGEN], doxygen, yes, no)
457 AC_CHECK_PROG([DOT], dot, yes, no)
460 AC_CHECK_PROG([XMLCATALOG], xmlcatalog, yes, no)
461 AC_CHECK_PROG([XSLTPROC], xsltproc, yes, no)
462 AC_CHECK_PROG([XMLLINT], xmllint, yes, no)
463 GLIBCXX_CONFIGURE_DOCBOOK
465 # Check for xml/html dependencies.
466 AM_CONDITIONAL(BUILD_XML,
467 test $ac_cv_prog_DOXYGEN = "yes" &&
468 test $ac_cv_prog_DOT = "yes" &&
469 test $ac_cv_prog_XSLTPROC = "yes" &&
470 test $ac_cv_prog_XMLLINT = "yes" &&
471 test $glibcxx_stylesheets = "yes")
473 AM_CONDITIONAL(BUILD_HTML,
474 test $ac_cv_prog_DOXYGEN = "yes" &&
475 test $ac_cv_prog_DOT = "yes" &&
476 test $ac_cv_prog_XSLTPROC = "yes" &&
477 test $ac_cv_prog_XMLLINT = "yes" &&
478 test $glibcxx_stylesheets = "yes")
480 # Check for man dependencies.
481 AM_CONDITIONAL(BUILD_MAN,
482 test $ac_cv_prog_DOXYGEN = "yes" &&
483 test $ac_cv_prog_DOT = "yes")
485 # Check for pdf dependencies.
486 AC_CHECK_PROG([DBLATEX], dblatex, yes, no)
487 AC_CHECK_PROG([PDFLATEX], pdflatex, yes, no)
488 AM_CONDITIONAL(BUILD_PDF,
489 test $ac_cv_prog_DOXYGEN = "yes" &&
490 test $ac_cv_prog_DOT = "yes" &&
491 test $ac_cv_prog_XSLTPROC = "yes" &&
492 test $ac_cv_prog_XMLLINT = "yes" &&
493 test $ac_cv_prog_DBLATEX = "yes" &&
494 test $ac_cv_prog_PDFLATEX = "yes")
497 *-*-darwin* ) glibcxx_include_dir_notparallel=yes ;;
498 * ) glibcxx_include_dir_notparallel=no ;;
500 AM_CONDITIONAL(INCLUDE_DIR_NOTPARALLEL,
501 test $glibcxx_include_dir_notparallel = "yes")
503 # Propagate the target-specific source directories through the build chain.
504 ATOMICITY_SRCDIR=config/${atomicity_dir}
505 ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
506 ATOMIC_FLAGS=${atomic_flags}
507 CPU_DEFINES_SRCDIR=config/${cpu_defines_dir}
508 OS_INC_SRCDIR=config/${os_include_dir}
509 ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir}
510 ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
511 CPU_OPT_EXT_RANDOM=config/${cpu_opt_ext_random}
512 CPU_OPT_BITS_RANDOM=config/${cpu_opt_bits_random}
513 AC_SUBST(ATOMICITY_SRCDIR)
514 AC_SUBST(ATOMIC_WORD_SRCDIR)
515 AC_SUBST(ATOMIC_FLAGS)
516 AC_SUBST(CPU_DEFINES_SRCDIR)
517 AC_SUBST(ABI_TWEAKS_SRCDIR)
518 AC_SUBST(OS_INC_SRCDIR)
519 AC_SUBST(ERROR_CONSTANTS_SRCDIR)
520 AC_SUBST(CPU_OPT_EXT_RANDOM)
521 AC_SUBST(CPU_OPT_BITS_RANDOM)
524 # Add CET specific flags if Intel CET is enabled.
525 GCC_CET_FLAGS(CET_FLAGS)
526 EXTRA_CXX_FLAGS="$EXTRA_CXX_FLAGS $CET_FLAGS"
527 EXTRA_CFLAGS="$EXTRA_CFLAGS $CET_FLAGS"
528 AC_SUBST(EXTRA_CFLAGS)
529 AC_SUBST(EXTRA_CXX_FLAGS)
531 # Determine cross-compile flags and AM_CONDITIONALs.
532 #AC_SUBST(GLIBCXX_IS_NATIVE)
533 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
534 GLIBCXX_EVALUATE_CONDITIONALS
538 if test ${multilib} = yes; then
539 multilib_arg="--enable-multilib"
544 # Export all the install information.
545 GLIBCXX_EXPORT_INSTALL_INFO
547 # Export all the include and flag information to Makefiles.
548 GLIBCXX_EXPORT_INCLUDES
551 # Determine what GCC version number to use in filesystem paths.
554 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
555 dnl which can all be called multiple times as needed, plus one (different)
556 dnl AC_OUTPUT macro. This one lists the files to be created:
557 AC_CONFIG_FILES(Makefile)
558 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
559 AC_CONFIG_FILES([scripts/extract_symvers],[chmod +x scripts/extract_symvers])
560 AC_CONFIG_FILES([doc/xsl/customization.xsl])
562 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
563 # that multilib installs will end up installed in the correct place.
564 # The testsuite needs it for multilib-aware ABI baseline files.
565 # To work around this not being passed down from config-ml.in ->
566 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
567 # append it here. Only modify Makefiles that have just been created.
569 # Also, get rid of this simulated-VPATH thing that automake does.
570 AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
571 [cat > vpsed$$ << \_EOF
572 s!`test -f '$<' || echo '$(srcdir)/'`!!
574 sed -f vpsed$$ $ac_file > tmp$$
577 echo 'MULTISUBDIR =' >> $ac_file
579 . ${multi_basedir}/config-ml.in
580 AS_UNSET([ml_norecursion])
583 AC_CONFIG_COMMANDS([generate-headers],
584 [(cd include && ${MAKE-make} pch_build= )])
586 dnl And this actually makes things happen: