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"
88 # Runs configure.host, and assorted other critical bits. Sets
89 # up critical shell variables.
93 if test "x${with_newlib}" != "xyes"; then
98 AC_SUBST(enable_shared)
99 AC_SUBST(enable_static)
101 if test "$enable_vtable_verify" = yes; then
102 predep_objects_CXX="${predep_objects_CXX} ${glibcxx_builddir}/../libgcc/vtv_start.o"
103 postdep_objects_CXX="${postdep_objects_CXX} ${glibcxx_builddir}/../libgcc/vtv_end.o"
107 # libtool variables for C++ shared and position-independent compiles.
109 # Use glibcxx_lt_pic_flag to designate the automake variable
110 # used to encapsulate the default libtool approach to creating objects
111 # with position-independent code. Default: -prefer-pic.
113 # Use glibcxx_compiler_shared_flag to designate a compile-time flags for
114 # creating shared objects. Default: -D_GLIBCXX_SHARED.
116 # Use glibcxx_compiler_pic_flag to designate a compile-time flags for
117 # creating position-independent objects. This varies with the target
118 # hardware and operating system, but is often: -DPIC -fPIC.
119 if test "$enable_shared" = yes; then
120 glibcxx_lt_pic_flag="-prefer-pic"
121 glibcxx_compiler_pic_flag="$lt_prog_compiler_pic_CXX"
122 glibcxx_compiler_shared_flag="-D_GLIBCXX_SHARED"
126 glibcxx_compiler_pic_flag=
127 glibcxx_compiler_shared_flag=
129 AC_SUBST(glibcxx_lt_pic_flag)
130 AC_SUBST(glibcxx_compiler_pic_flag)
131 AC_SUBST(glibcxx_compiler_shared_flag)
133 # Override the libtool's pic_flag and pic_mode.
134 # Do this step after AM_PROG_LIBTOOL, but before AC_OUTPUT.
135 # NB: this impacts --with-pic and --without-pic.
136 lt_prog_compiler_pic_CXX="$glibcxx_compiler_pic_flag $glibcxx_compiler_shared_flag"
139 # Eliminate -lstdc++ addition to postdeps for cross compiles.
140 postdeps_CXX=`echo " $postdeps_CXX " | sed 's, -lstdc++ ,,g'`
142 # Possibly disable most of the library.
143 ## TODO: Consider skipping unncessary tests altogether in this case, rather
144 ## than just ignoring the results. Faster /and/ more correct, win win.
145 GLIBCXX_ENABLE_HOSTED
147 # Enable descriptive messages to standard output on termination.
148 GLIBCXX_ENABLE_VERBOSE
150 # Enable compiler support that doesn't require linking.
151 GLIBCXX_ENABLE_PCH($is_hosted)
152 GLIBCXX_ENABLE_THREADS
153 GLIBCXX_ENABLE_ATOMIC_BUILTINS
154 GLIBCXX_ENABLE_LOCK_POLICY
155 GLIBCXX_ENABLE_DECIMAL_FLOAT
156 GLIBCXX_ENABLE_INT128_FLOAT128
157 if test "$enable_float128" = yes; then
158 port_specific_symbol_files="$port_specific_symbol_files \$(top_srcdir)/config/abi/pre/float128.ver"
161 # Checks for compiler support that doesn't require linking.
162 GLIBCXX_CHECK_COMPILER_FEATURES
164 # Enable all the variable C++ runtime options that don't require linking.
165 GLIBCXX_ENABLE_CSTDIO
166 GLIBCXX_ENABLE_CLOCALE
167 GLIBCXX_ENABLE_ALLOCATOR
168 GLIBCXX_ENABLE_CHEADERS($c_model) dnl c_model from configure.host
169 GLIBCXX_ENABLE_LONG_LONG([yes])
170 GLIBCXX_ENABLE_WCHAR_T([yes])
171 GLIBCXX_ENABLE_C99([yes])
172 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
173 GLIBCXX_ENABLE_DEBUG_FLAGS(["-gdwarf-4 -g3 -O0 -D_GLIBCXX_ASSERTIONS"])
174 GLIBCXX_ENABLE_DEBUG([no])
175 GLIBCXX_ENABLE_PARALLEL([yes])
176 GLIBCXX_ENABLE_CXX_FLAGS
177 GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
178 GLIBCXX_ENABLE_EXTERN_TEMPLATE([yes])
179 GLIBCXX_ENABLE_PYTHON
180 GLIBCXX_ENABLE_WERROR([no])
181 GLIBCXX_ENABLE_VTABLE_VERIFY([no])
183 # Checks for operating systems support that doesn't require linking.
184 GLIBCXX_CHECK_STDIO_PROTO
185 GLIBCXX_CHECK_MATH11_PROTO
186 GLIBCXX_CHECK_SYSTEM_ERROR
187 GLIBCXX_CHECK_UCHAR_H
189 # For the streamoff typedef.
190 GLIBCXX_CHECK_INT64_T
195 # For showmanyc_helper().
196 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
198 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
201 AC_CHECK_HEADERS(sys/uio.h)
204 # Check for fenv.h and complex.h before GLIBCXX_CHECK_C99_TR1
205 # so that the check is done with the C compiler (not C++).
206 # Checking with C++ can break a canadian cross build if either
207 # file does not exist in C but does in C++.
208 AC_CHECK_HEADERS(fenv.h complex.h)
210 # For C99 support to TR1.
211 GLIBCXX_CHECK_C99_TR1
213 # For the EOF, SEEK_CUR, and SEEK_END integer constants.
214 GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS
216 # For gettimeofday support.
217 GLIBCXX_CHECK_GETTIMEOFDAY
219 # For clock_gettime, nanosleep and sched_yield support.
220 GLIBCXX_ENABLE_LIBSTDCXX_TIME
222 # Check for tmpnam which is obsolescent in POSIX.1-2008
225 # For pthread_cond_clockwait
226 GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT
230 # For hardware_concurrency
231 AC_CHECK_HEADERS(sys/sysinfo.h)
232 GLIBCXX_CHECK_GET_NPROCS
233 AC_CHECK_HEADERS(unistd.h)
234 GLIBCXX_CHECK_SC_NPROCESSORS_ONLN
235 GLIBCXX_CHECK_SC_NPROC_ONLN
236 GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP
237 GLIBCXX_CHECK_SYSCTL_HW_NCPU
240 # Check for available headers.
241 AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
242 locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
243 strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \
244 sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
245 wchar.h wctype.h linux/types.h])
247 AC_CHECK_HEADERS([linux/random.h], [], [],
248 [[#ifdef HAVE_LINUX_TYPES_H
249 # include <linux/types.h>
253 # Only do link tests if native. Else, hardcode.
254 if $GLIBCXX_IS_NATIVE; then
256 # We can do more elaborate tests that assume a working linker.
259 GLIBCXX_CHECK_LINKER_FEATURES
260 GLIBCXX_CHECK_MATH_SUPPORT
261 GLIBCXX_CHECK_STDLIB_SUPPORT
263 # For /dev/random and /dev/urandom for std::random_device.
264 GLIBCXX_CHECK_DEV_RANDOM
269 AC_CHECK_FUNCS(__cxa_thread_atexit_impl __cxa_thread_atexit)
270 AC_CHECK_FUNCS(aligned_alloc posix_memalign memalign _aligned_malloc)
271 AC_CHECK_FUNCS(_wfopen)
273 # C11 functions for C++17 library
274 AC_CHECK_FUNCS(timespec_get)
277 AC_CHECK_FUNCS(sockatmark)
284 # This lets us hard-code the functionality we know we'll have in the cross
285 # target environment. "Let" is a sugar-coated word placed on an especially
286 # dull and tedious hack, actually.
288 # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
289 # that involve linking, can't be used:
290 # "cannot open sim-crt0.o"
291 # "cannot open crt0.o"
292 # etc. All this is because there currently exists no unified, consistent
293 # way for top level CC information to be passed down to target directories:
294 # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
295 # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
296 # crosses can be removed.
298 # If Canadian cross, then don't pick up tools from the build directory.
299 # Used only in GLIBCXX_EXPORT_INCLUDES.
300 if test -n "$with_cross_host" &&
301 test x"$build_alias" != x"$with_cross_host" &&
302 test x"$build" != x"$target";
309 # Construct crosses by hand, eliminating bits that need ld...
310 # GLIBCXX_CHECK_MATH_SUPPORT
312 # First, test for "known" system libraries. We may be using newlib even
313 # on a hosted environment.
314 if test "x${with_newlib}" = "xyes"; then
315 os_include_dir="os/newlib"
316 AC_DEFINE(HAVE_HYPOT)
318 # GLIBCXX_CHECK_STDLIB_SUPPORT
319 AC_DEFINE(HAVE_STRTOF)
321 AC_DEFINE(HAVE_ACOSF)
322 AC_DEFINE(HAVE_ASINF)
323 AC_DEFINE(HAVE_ATAN2F)
324 AC_DEFINE(HAVE_ATANF)
325 AC_DEFINE(HAVE_CEILF)
327 AC_DEFINE(HAVE_COSHF)
329 AC_DEFINE(HAVE_FABSF)
330 AC_DEFINE(HAVE_FLOORF)
331 AC_DEFINE(HAVE_FMODF)
332 AC_DEFINE(HAVE_FREXPF)
333 AC_DEFINE(HAVE_LDEXPF)
334 AC_DEFINE(HAVE_LOG10F)
336 AC_DEFINE(HAVE_MODFF)
339 AC_DEFINE(HAVE_SINHF)
340 AC_DEFINE(HAVE_SQRTF)
342 AC_DEFINE(HAVE_TANHF)
344 AC_DEFINE(HAVE_ICONV)
345 AC_DEFINE(HAVE_MEMALIGN)
350 # At some point, we should differentiate between architectures
351 # like x86, which have long double versions, and alpha/powerpc/etc.,
352 # which don't. For the time being, punt.
353 if test x"long_double_math_on_this_cpu" = x"yes"; then
354 AC_DEFINE(HAVE_ACOSL)
355 AC_DEFINE(HAVE_ASINL)
356 AC_DEFINE(HAVE_ATAN2L)
357 AC_DEFINE(HAVE_ATANL)
358 AC_DEFINE(HAVE_CEILL)
360 AC_DEFINE(HAVE_COSHL)
362 AC_DEFINE(HAVE_FABSL)
363 AC_DEFINE(HAVE_FLOORL)
364 AC_DEFINE(HAVE_FMODL)
365 AC_DEFINE(HAVE_FREXPL)
366 AC_DEFINE(HAVE_LDEXPL)
367 AC_DEFINE(HAVE_LOG10L)
369 AC_DEFINE(HAVE_MODFL)
371 AC_DEFINE(HAVE_SINCOSL)
373 AC_DEFINE(HAVE_SINHL)
374 AC_DEFINE(HAVE_SQRTL)
376 AC_DEFINE(HAVE_TANHL)
380 # Check for _Unwind_GetIPInfo.
381 GCC_CHECK_UNWIND_GETIPINFO
383 GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])
385 GCC_HEADER_STDINT(include/gstdint.h)
387 GLIBCXX_ENABLE_SYMVERS([yes])
388 AC_SUBST(libtool_VERSION)
390 GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY([yes])
392 GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI([yes])
396 LONG_DOUBLE_COMPAT_FLAGS="-mlong-double-64"
398 powerpc*-*-linux* | \
403 #if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__))
404 #error no need for long double compatibility
406 ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])
407 if test "$ac_ldbl_compat" = yes; then
408 AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1,
409 [Define if compatibility should be provided for -mlong-double-64.])
410 port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
413 LONG_DOUBLE_COMPAT_FLAGS="$LONG_DOUBLE_COMPAT_FLAGS -mno-gnu-attribute" ;;
417 AC_SUBST(LONG_DOUBLE_COMPAT_FLAGS)
418 GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes)
420 # Check if assembler supports disabling hardware capability support.
421 GCC_CHECK_ASSEMBLER_HWCAP
423 # Check if assembler supports rdrand opcode.
424 GLIBCXX_CHECK_X86_RDRAND
425 # Check if assembler supports rdseed opcode.
426 GLIBCXX_CHECK_X86_RDSEED
428 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
429 GLIBCXX_CONFIGURE_TESTSUITE
431 # For gthread support. Depends on GLIBCXX_ENABLE_SYMVERS.
432 GLIBCXX_CHECK_GTHREADS
435 AC_CHECK_HEADERS([fcntl.h dirent.h sys/statvfs.h utime.h])
436 GLIBCXX_ENABLE_FILESYSTEM_TS
437 GLIBCXX_CHECK_FILESYSTEM_DEPS
440 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])
442 # For Transactional Memory TS
443 GLIBCXX_CHECK_SIZE_T_MANGLING
445 # Check which release added std::exception_ptr for the target
446 GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER
448 # Define documentation rules conditionally.
450 # See if makeinfo has been installed and is modern enough
451 # that we can use it.
452 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
453 [GNU texinfo.* \([0-9][0-9.]*\)],
454 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
455 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
458 AC_CHECK_PROG([DOXYGEN], doxygen, yes, no)
459 AC_CHECK_PROG([DOT], dot, yes, no)
462 AC_CHECK_PROG([XMLCATALOG], xmlcatalog, yes, no)
463 AC_CHECK_PROG([XSLTPROC], xsltproc, yes, no)
464 AC_CHECK_PROG([XMLLINT], xmllint, yes, no)
465 GLIBCXX_CONFIGURE_DOCBOOK
467 # Check for xml/html dependencies.
468 AM_CONDITIONAL(BUILD_XML,
469 test $ac_cv_prog_DOXYGEN = "yes" &&
470 test $ac_cv_prog_DOT = "yes" &&
471 test $ac_cv_prog_XSLTPROC = "yes" &&
472 test $ac_cv_prog_XMLLINT = "yes" &&
473 test $glibcxx_stylesheets = "yes")
475 AM_CONDITIONAL(BUILD_HTML,
476 test $ac_cv_prog_DOXYGEN = "yes" &&
477 test $ac_cv_prog_DOT = "yes" &&
478 test $ac_cv_prog_XSLTPROC = "yes" &&
479 test $ac_cv_prog_XMLLINT = "yes" &&
480 test $glibcxx_stylesheets = "yes")
482 # Check for man dependencies.
483 AM_CONDITIONAL(BUILD_MAN,
484 test $ac_cv_prog_DOXYGEN = "yes" &&
485 test $ac_cv_prog_DOT = "yes")
487 # Check for pdf dependencies.
488 AC_CHECK_PROG([DBLATEX], dblatex, yes, no)
489 AC_CHECK_PROG([PDFLATEX], pdflatex, yes, no)
490 AM_CONDITIONAL(BUILD_PDF,
491 test $ac_cv_prog_DOXYGEN = "yes" &&
492 test $ac_cv_prog_DOT = "yes" &&
493 test $ac_cv_prog_XSLTPROC = "yes" &&
494 test $ac_cv_prog_XMLLINT = "yes" &&
495 test $ac_cv_prog_DBLATEX = "yes" &&
496 test $ac_cv_prog_PDFLATEX = "yes")
499 *-*-darwin* ) glibcxx_include_dir_notparallel=yes ;;
500 * ) glibcxx_include_dir_notparallel=no ;;
502 AM_CONDITIONAL(INCLUDE_DIR_NOTPARALLEL,
503 test $glibcxx_include_dir_notparallel = "yes")
505 # Propagate the target-specific source directories through the build chain.
506 ATOMICITY_SRCDIR=config/${atomicity_dir}
507 ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
508 ATOMIC_FLAGS=${atomic_flags}
509 CPU_DEFINES_SRCDIR=config/${cpu_defines_dir}
510 OS_INC_SRCDIR=config/${os_include_dir}
511 ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir}
512 ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
513 CPU_OPT_EXT_RANDOM=config/${cpu_opt_ext_random}
514 CPU_OPT_BITS_RANDOM=config/${cpu_opt_bits_random}
515 AC_SUBST(ATOMICITY_SRCDIR)
516 AC_SUBST(ATOMIC_WORD_SRCDIR)
517 AC_SUBST(ATOMIC_FLAGS)
518 AC_SUBST(CPU_DEFINES_SRCDIR)
519 AC_SUBST(ABI_TWEAKS_SRCDIR)
520 AC_SUBST(OS_INC_SRCDIR)
521 AC_SUBST(ERROR_CONSTANTS_SRCDIR)
522 AC_SUBST(CPU_OPT_EXT_RANDOM)
523 AC_SUBST(CPU_OPT_BITS_RANDOM)
526 # Add CET specific flags if Intel CET is enabled.
527 GCC_CET_FLAGS(CET_FLAGS)
528 EXTRA_CXX_FLAGS="$EXTRA_CXX_FLAGS $CET_FLAGS"
529 EXTRA_CFLAGS="$EXTRA_CFLAGS $CET_FLAGS"
530 AC_SUBST(EXTRA_CFLAGS)
531 AC_SUBST(EXTRA_CXX_FLAGS)
533 # Determine cross-compile flags and AM_CONDITIONALs.
534 #AC_SUBST(GLIBCXX_IS_NATIVE)
535 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
536 GLIBCXX_EVALUATE_CONDITIONALS
540 if test ${multilib} = yes; then
541 multilib_arg="--enable-multilib"
546 # Export all the install information.
547 GLIBCXX_EXPORT_INSTALL_INFO
549 # Export all the include and flag information to Makefiles.
550 GLIBCXX_EXPORT_INCLUDES
553 # Determine what GCC version number to use in filesystem paths.
556 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
557 dnl which can all be called multiple times as needed, plus one (different)
558 dnl AC_OUTPUT macro. This one lists the files to be created:
559 AC_CONFIG_FILES(Makefile)
560 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
561 AC_CONFIG_FILES([scripts/extract_symvers],[chmod +x scripts/extract_symvers])
562 AC_CONFIG_FILES([doc/xsl/customization.xsl])
564 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
565 # that multilib installs will end up installed in the correct place.
566 # The testsuite needs it for multilib-aware ABI baseline files.
567 # To work around this not being passed down from config-ml.in ->
568 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
569 # append it here. Only modify Makefiles that have just been created.
571 # Also, get rid of this simulated-VPATH thing that automake does.
572 AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
573 [cat > vpsed$$ << \_EOF
574 s!`test -f '$<' || echo '$(srcdir)/'`!!
576 sed -f vpsed$$ $ac_file > tmp$$
579 echo 'MULTISUBDIR =' >> $ac_file
581 . ${multi_basedir}/config-ml.in
582 AS_UNSET([ml_norecursion])
585 AC_CONFIG_COMMANDS([generate-headers],
586 [(cd include && ${MAKE-make} pch_build= )])
588 dnl And this actually makes things happen: