2 m4_define([V_MAJOR], [2])
3 m4_define([V_MINOR], [12])
4 m4_define([V_PATCH], [1])
5 dnl m4_define([V_EXTRA], [])
6 m4_define([V_NAME], [[(Ta) Meilleure]])
7 m4_define([V_DESC], [[Ta Meilleure is a Northeast IPA beer brewed by Lagabière. Translating to "Your best one", this beer gives out strong aromas of passion fruit, lemon, and peaches. Tastewise, expect a lot of fruit, a creamy texture, and a smooth lingering hop bitterness.]])
9 m4_define([V_STRING], [V_MAJOR.V_MINOR.V_PATCH])
10 m4_ifdef([V_EXTRA], [m4_append([V_STRING], [-V_EXTRA])])
13 AC_INIT([lttng-ust], V_STRING, [mathieu dot desnoyers at efficios dot com], [], [https://lttng.org])
15 dnl Substitute minor/major/patchlevel version numbers
16 AC_SUBST([MAJOR_VERSION], [V_MAJOR])
17 AC_SUBST([MINOR_VERSION], [V_MINOR])
18 AC_SUBST([PATCHLEVEL_VERSION], [V_PATCH])
20 # Following the numbering scheme proposed by libtool for the library version
21 # http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
22 # This is the library version of liblttng-ust.
23 m4_define([UST_LIB_V_MAJOR], [0])
24 m4_define([UST_LIB_V_MINOR], [0])
25 m4_define([UST_LIB_V_PATCH], [0])
27 AC_SUBST([LTTNG_UST_LIBRARY_VERSION], [UST_LIB_V_MAJOR:UST_LIB_V_MINOR:UST_LIB_V_PATCH])
28 AC_DEFINE([CONFIG_LTTNG_UST_LIBRARY_VERSION_MAJOR], [UST_LIB_V_MAJOR], [Major SONAME number of the ust library])
29 # note: remember to update tracepoint.h dlopen() to match this version
30 # number. TODO: eventually automate by exporting the major number.
32 # This is the library version of liblttng-ust-ctl, used internally by
33 # liblttng-ust, lttng-sessiond, and lttng-consumerd.
34 AC_SUBST([LTTNG_UST_CTL_LIBRARY_VERSION], [4:0:0])
36 AC_CONFIG_HEADERS([config.h include/lttng/ust-config.h])
37 AC_CONFIG_AUX_DIR([config])
38 AC_CONFIG_MACRO_DIR([m4])
39 AC_CONFIG_SRCDIR([include/lttng/tracepoint.h])
44 AM_INIT_AUTOMAKE([1.12 foreign dist-bzip2 no-dist-gzip tar-ustar])
45 AM_MAINTAINER_MODE([enable])
47 # Enable silent rules if available (Introduced in AM 1.11)
48 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
50 AC_REQUIRE_AUX_FILE([tap-driver.sh])
52 # Checks for C compiler
53 AC_USE_SYSTEM_EXTENSIONS
56 # AC_PROG_CC_STDC was merged in AC_PROG_CC in autoconf 2.70
57 m4_version_prereq([2.70], [], [AC_PROG_CC_STDC])
60 AM_CONDITIONAL([CXX_WORKS], [test "x$rw_cv_prog_cxx_works" = "xyes"])
62 # Check if the compiler support weak symbols
65 AS_IF([test "x${ax_cv_sys_weak_alias}" = "xno"], [
66 AC_MSG_ERROR([Your platform doesn't support weak symbols.])
69 # Checks for programs.
76 AC_CHECK_PROG([CMAKE], [cmake])
77 AM_CONDITIONAL([HAVE_CMAKE], [test "x$CMAKE" != "x"])
79 # libtool link_all_deplibs fixup. See http://bugs.lttng.org/issues/321.
80 AC_ARG_ENABLE([libtool-linkdep-fixup], [
81 AS_HELP_STRING([--disable-libtool-linkdep-fixup], [disable the libtool fixup for linking all dependent libraries (link_all_deplibs)])
83 libtool_fixup=$enableval
88 AS_IF([test "x$libtool_fixup" = "xyes"], [
89 libtool_m4="$srcdir/m4/libtool.m4"
90 libtool_flag_pattern=".*link_all_deplibs\s*,\s*\$1\s*)"
91 AC_MSG_CHECKING([for occurence(s) of link_all_deplibs = no in $libtool_m4])
92 libtool_flag_pattern_count=$(grep -c "$libtool_flag_pattern\s*=\s*no" $libtool_m4)
94 AS_IF([test $libtool_flag_pattern_count -ne 0], [
95 AC_MSG_RESULT([$libtool_flag_pattern_count])
96 AC_MSG_WARN([the detected libtool will not link all dependencies, forcing link_all_deplibs = unknown])
97 $SED -i "s/\($libtool_flag_pattern\)\s*=\s*no/\1=unknown/g" $libtool_m4
102 LT_INIT([disable-static])
104 AC_MSG_CHECKING([whether shared libraries are enabled])
105 AS_IF([test "x$enable_shared" = "xyes"], [
109 AC_MSG_ERROR([LTTng-UST requires shared libraries to be enabled])
112 # Checks for typedefs, structures, and compiler characteristics.
128 AC_CHECK_TYPES([ptrdiff_t])
131 AS_IF([test "x$ax_cv___attribute__" = "xyes"],
133 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
135 # Checks for library functions.
164 # AC_FUNC_MALLOC causes problems when cross-compiling.
167 # Checks for header files.
181 # Set architecture specific options
191 [s390], [NO_UNALIGNED_ACCESS=1],
192 [s390x], [NO_UNALIGNED_ACCESS=1],
194 NO_UNALIGNED_ACCESS=1
197 [aarch64*], [NO_UNALIGNED_ACCESS=1],
198 [mips*], [NO_UNALIGNED_ACCESS=1],
199 [tile*], [NO_UNALIGNED_ACCESS=1],
202 NO_UNALIGNED_ACCESS=1
205 # Configuration options, which will be installed in the config.h
206 AH_TEMPLATE([LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS], [Use efficient unaligned access.])
207 AH_TEMPLATE([LTTNG_UST_HAVE_SDT_INTEGRATION], [SystemTap integration via sdt.h])
208 AH_TEMPLATE([LTTNG_UST_HAVE_PERF_EVENT], [Perf event integration via perf_event.h])
210 # Checks for libraries.
211 AC_CHECK_LIB([dl], [dlopen], [
215 #libdl not found, check for dlopen in libc.
216 AC_CHECK_LIB([c], [dlopen], [
220 AC_MSG_ERROR([Cannot find dlopen in libdl nor libc. Use [LDFLAGS]=-Ldir to specify their location.])
225 # Check if libdl has dlmopen support.
226 AH_TEMPLATE([HAVE_DLMOPEN], ["Define to 1 if dlmopen is available."])
227 AC_CHECK_LIB([$libdl_name], [dlmopen],
228 [AC_DEFINE([HAVE_DLMOPEN], [1])]
231 AC_CHECK_LIB([pthread], [pthread_create])
232 AC_CHECK_LIB([pthread], [pthread_setname_np],
233 AC_DEFINE([HAVE_PTHREAD_SETNAME_NP], [1], [Define to 1 if pthread_setname_np is available.]),
234 AC_CHECK_LIB([pthread], [pthread_set_name_np],
235 AC_DEFINE([HAVE_PTHREAD_SET_NAME_NP], [1], [Define to 1 if pthread_set_name_np is available.]),
236 AC_MSG_RESULT([pthread setname/set_name not found.])))
239 AC_CHECK_HEADER([dlfcn.h])
240 AS_IF([test "x${ac_cv_header_dlfcn_h}" = "xyes"], [
241 AC_CHECK_DECLS([RTLD_DI_LINKMAP], [], [], [
242 #define _GNU_SOURCE /* Required on Linux to get GNU extensions */
246 ac_cv_have_decl_RTLD_DI_LINKMAP="no"
249 AM_CONDITIONAL([HAVE_DLINFO], [test "x${ac_cv_have_decl_RTLD_DI_LINKMAP}" = "xyes"])
253 # urcu - check if we just find the headers it out of the box.
254 AC_CHECK_HEADERS([urcu-bp.h], [], [AC_MSG_ERROR([Cannot find [URCU] headers (urcu-bp.h). Use [CPPFLAGS]=-Idir to specify their location.
255 This error can also occur when the liburcu package's configure script has not been run.])])
257 # urcu-cds - check that URCU Concurrent Data Structure lib is available to compilation
258 # Part of Userspace RCU library 0.7.2 or better.
259 AC_CHECK_LIB([urcu-cds], [_cds_lfht_new], [], [AC_MSG_ERROR([Cannot find
260 liburcu-cds lib, part of Userspace RCU 0.7 or better. Use [LDFLAGS]=-Ldir to specify its location.])])
262 AC_MSG_CHECKING([caa_likely()])
263 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
264 #include <urcu/compiler.h>
274 AC_MSG_ERROR([Please upgrade your version of liburcu to 0.6.6 or better])
277 # urcu - check that URCU lib is available to compilation
278 AC_CHECK_LIB([urcu-bp], [urcu_bp_synchronize_rcu], [], [AC_MSG_ERROR([Cannot find liburcu-bp 0.11 or newer. Use [LDFLAGS]=-Ldir to specify its location.])])
280 # urcu - check that URCU lib is at least version 0.11
281 AC_CHECK_LIB([urcu-bp], [urcu_bp_call_rcu], [], [AC_MSG_ERROR([liburcu 0.11 or newer is needed, please update your version or use [LDFLAGS]=-Ldir to specify the right location.])])
284 AS_IF([test "x$NO_NUMA" = "x1"],[
285 AS_IF([test "x$enable_numa" = "x" ], [enable_numa=no])
288 AC_ARG_ENABLE([numa], [
289 AS_HELP_STRING([--disable-numa], [disable NUMA support])
291 enable_numa=$enableval
296 AS_IF([test "x$enable_numa" = "xyes"], [
297 # numa - check that numa lib is available
298 AC_CHECK_LIB([numa], [numa_available], [],
299 [AC_MSG_ERROR([libnuma is not available. Please either install it (e.g. libnuma-dev) or use [LDFLAGS]=-Ldir to specify the right location, or use --disable-numa configure argument to disable NUMA support.])])
302 AM_CONDITIONAL([HAVE_LIBNUMA], [test "x$have_libnuma" = "xyes"])
304 # optional linux/perf_event.h
305 AC_CHECK_HEADERS([linux/perf_event.h], [have_perf_event=yes], [])
307 # Perf event counters are supported on all architectures supported by
308 # perf, using the read system call as fallback.
309 AM_CONDITIONAL([HAVE_PERF_EVENT], [test "x$have_perf_event" = "xyes"])
311 AS_IF([test "x$have_perf_event" = "xyes"], [
312 AC_DEFINE([LTTNG_UST_HAVE_PERF_EVENT], [1])
315 AS_IF([test "x$NO_UNALIGNED_ACCESS" = "x"], [
316 AC_DEFINE([LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS], [1])
319 # Check for JNI header files if requested
320 AC_ARG_ENABLE([jni-interface], [
321 AS_HELP_STRING([--enable-jni-interface], [build JNI interface between C and Java. Needs Java include files [default=no]])
323 jni_interface=$enableval
328 AM_CONDITIONAL([BUILD_JNI_INTERFACE], [test "x$jni_interface" = "xyes"])
331 AC_ARG_ENABLE([java-agent-jul], [
332 AS_HELP_STRING([--enable-java-agent-jul], [build the LTTng UST Java agent with JUL support [default=no]])
334 java_agent_jul=$enableval
339 AC_ARG_ENABLE([java-agent-log4j], [
340 AS_HELP_STRING([--enable-java-agent-log4j], [build the LTTng UST Java agent with Log4j support [default=no]])
342 java_agent_log4j=$enableval
347 AC_ARG_ENABLE([java-agent-all], [
348 AS_HELP_STRING([--enable-java-agent-all], [build the LTTng UST Java agent with all supported backends [default=no]])
350 java_agent_jul=$enableval
351 java_agent_log4j=$enableval
354 AM_CONDITIONAL([BUILD_JAVA_AGENT], [test "x$java_agent_jul" = "xyes" || test "x$java_agent_log4j" = "xyes"])
355 AM_CONDITIONAL([BUILD_JAVA_AGENT_WITH_JUL], [test "x$java_agent_jul" = "xyes"])
356 AM_CONDITIONAL([BUILD_JAVA_AGENT_WITH_LOG4J], [test "x$java_agent_log4j" = "xyes"])
358 AS_IF([test "x$jni_interface" = "xyes" || test "x$java_agent_jul" = "xyes" || test "x$java_agent_log4j" = "xyes"], [
363 AC_ARG_VAR([CLASSPATH], [Java class path])
366 for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS
368 JNI_CPPFLAGS="$JNI_CPPFLAGS -I$JNI_INCLUDE_DIR"
371 saved_CPPFLAGS="$CPPFLAGS"
372 CPPFLAGS="$CPPFLAGS $JNI_CPPFLAGS"
374 CPPFLAGS="$saved_CPPFLAGS"
377 AM_CONDITIONAL([HAVE_JAVAH], [test "x$JAVAH" != "x"])
379 AS_IF([test "x$java_agent_log4j" = "xyes"], [
381 AX_CHECK_CLASS([org.apache.log4j.Logger])
382 AS_IF([test "x$ac_cv_class_org_apache_log4j_Logger" = "xno"], [
383 AC_MSG_ERROR([The UST Java agent support for log4j was requested but the Log4j classes were not found. Please specify the location of the Log4j jar via the Java CLASSPATH e.g: export CLASSPATH="/path/to/log4j.jar"])
387 # Option to build the python agent
388 AC_ARG_ENABLE([python-agent], [
389 AS_HELP_STRING([--enable-python-agent], [build the LTTng UST Python agent [default=no]])
391 python_agent=$enableval
393 AM_CONDITIONAL([BUILD_PYTHON_AGENT], [test "x$python_agent" = "xyes"])
394 AS_IF([test "x$python_agent" = "xyes"], [
395 AM_PATH_PYTHON([2.7])
400 AS_HELP_STRING([--with-sdt], [provide SystemTap integration via sdt.h [default=no]])
407 AS_IF([test "x$with_sdt" = "xyes"], [
408 AC_MSG_CHECKING([STAP_PROBEV()])
409 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
410 #define SDT_USE_VARIADIC
414 STAP_PROBEV(provider,name,1,2,3,4,5,6,7,8,9,10);
418 AC_DEFINE([LTTNG_UST_HAVE_SDT_INTEGRATION], [1])
421 AC_MSG_ERROR([The sdt.h integration was requested but the STAP_PROBEV define cannot be used. Make sure it is installed, and up to date, or use CPPFLAGS=-I/path/ to specify a non-standard path to sys/sdt.h])
425 AC_ARG_WITH([lttng-system-rundir], [
426 AS_HELP_STRING([--with-lttng-system-rundir], [Location of the system directory where LTTng-UST expects the system-wide lttng-sessiond runtime files. The default is "/var/run/lttng".]),
428 lttng_system_rundir="$withval"
430 lttng_system_rundir="/var/run/lttng"
432 AC_DEFINE_UNQUOTED([LTTNG_SYSTEM_RUNDIR], ["$lttng_system_rundir"],
433 [LTTng system runtime directory])
435 AC_CHECK_PROG([BUILD_GEN_TP_EXAMPLES], [python], ["yes"])
436 AM_CONDITIONAL([BUILD_GEN_TP_EXAMPLES], [test "x$BUILD_GEN_TP_EXAMPLES" = "xyes"])
438 # Enable building examples
442 [--disable-examples],
443 [Do not build and install examples]
445 [enable_examples=$enableval],
446 [enable_examples=yes]
449 AM_CONDITIONAL([ENABLE_EXAMPLES], [test "x$enable_examples" != "xno"])
451 # Set $IN_GIT_REPO if we're in the Git repository; the `bootstrap` file
452 # is not distributed in tarballs.
453 AS_IF([test -f "$srcdir/bootstrap"], [in_git_repo=yes], [in_git_repo=no])
454 AM_CONDITIONAL([IN_GIT_REPO], [test "x$in_git_repo" = "xyes"])
456 # Enable building man pages (user's intention).
460 [--disable-man-pages],
461 [Do not build and install man pages (already built in a distributed tarball)]
463 [man_pages_opt=$enableval],
467 # Check for asciidoc and xmlto if we enabled building the man pages.
468 have_asciidoc_xmlto=no
469 warn_prebuilt_man_pages=no
471 AS_IF([test "x$man_pages_opt" = "xyes"], [
472 AC_PATH_PROG([ASCIIDOC], [asciidoc], [no])
473 AC_PATH_PROG([XMLTO], [xmlto], [no])
475 AS_IF([test "x$ASCIIDOC" = "xno" || test "x$XMLTO" = "xno"], [
476 AS_IF([test "x$in_git_repo" = "xyes"], [
477 # This is an error because we're in the Git repo, which
478 # means the man pages are not already generated for us,
479 # thus asciidoc/xmlto are required because we were asked
480 # to build the man pages.
482 Both asciidoc and xmlto are needed to build the LTTng-UST man pages. Use
483 --disable-man-pages to disable building the man pages, in which case
484 they will not be installed.
487 # Only warn here: since we're in the tarball, the man
488 # pages should already be generated at this point, thus
489 # asciidoc/xmlto are not strictly required.
490 warn_prebuilt_man_pages=yes
493 have_asciidoc_xmlto=yes
497 # Export man page build condition: build the man pages if the user
498 # asked for it, and if the tools are available.
499 AM_CONDITIONAL([MAN_PAGES_OPT], [test "x$man_pages_opt" != "xno"])
500 AM_CONDITIONAL([HAVE_ASCIIDOC_XMLTO], [test "x$have_asciidoc_xmlto" = "xyes"])
503 AC_DEFUN([_AC_DEFINE_AND_SUBST], [
504 AC_DEFINE_UNQUOTED([CONFIG_$1], [$2], [$1])
509 _AC_DEFINE_AND_SUBST([LTTNG_UST_DEFAULT_CONSTRUCTOR_TIMEOUT_MS], [3000])
513 AC_SUBST(JNI_CPPFLAGS)
518 doc/examples/Makefile
521 include/lttng/ust-version.h
523 libringbuffer/Makefile
524 liblttng-ust-comm/Makefile
525 liblttng-ust/Makefile
526 liblttng-ust-ctl/Makefile
527 liblttng-ust-fork/Makefile
528 liblttng-ust-dl/Makefile
529 liblttng-ust-fd/Makefile
530 liblttng-ust-java/Makefile
531 liblttng-ust-java-agent/Makefile
532 liblttng-ust-java-agent/java/Makefile
533 liblttng-ust-java-agent/java/lttng-ust-agent-all/Makefile
534 liblttng-ust-java-agent/java/lttng-ust-agent-common/Makefile
535 liblttng-ust-java-agent/java/lttng-ust-agent-jul/Makefile
536 liblttng-ust-java-agent/java/lttng-ust-agent-log4j/Makefile
537 liblttng-ust-java-agent/jni/Makefile
538 liblttng-ust-java-agent/jni/common/Makefile
539 liblttng-ust-java-agent/jni/jul/Makefile
540 liblttng-ust-java-agent/jni/log4j/Makefile
541 liblttng-ust-libc-wrapper/Makefile
542 liblttng-ust-cyg-profile/Makefile
543 liblttng-ust-python-agent/Makefile
544 python-lttngust/Makefile
545 python-lttngust/setup.py
546 python-lttngust/lttngust/__init__.py
549 tests/ctf-types/Makefile
551 tests/hello-many/Makefile
552 tests/hello.cxx/Makefile
553 tests/same_line_tracepoint/Makefile
554 tests/snprintf/Makefile
555 tests/ust-elf/Makefile
556 tests/benchmark/Makefile
558 tests/test-app-ctx/Makefile
559 tests/gcc-weak-hidden/Makefile
564 # Create link for python agent for the VPATH guru.
566 python-lttngust/lttngust/agent.py:python-lttngust/lttngust/agent.py
567 python-lttngust/lttngust/cmd.py:python-lttngust/lttngust/cmd.py
568 python-lttngust/lttngust/compat.py:python-lttngust/lttngust/compat.py
569 python-lttngust/lttngust/debug.py:python-lttngust/lttngust/debug.py
570 python-lttngust/lttngust/loghandler.py:python-lttngust/lttngust/loghandler.py
573 AC_CONFIG_FILES([tests/ust-elf/test_ust_elf],[chmod +x tests/ust-elf/test_ust_elf])
579 # Mini-report on what will be built.
587 AS_ECHO("${PPRINT_COLOR_BLDBLU}LTTng-ust $PACKAGE_VERSION \"V_NAME\"$PPRINT_COLOR_RST")
593 PPRINT_SUBTITLE([System])
595 PPRINT_PROP_STRING([Target architecture], $host_cpu)
597 test "x$NO_UNALIGNED_ACCESS" != "x1" && value=1 || value=0
598 PPRINT_PROP_BOOL([Efficient unaligned memory access], $value)
600 AS_IF([test "x$UNSUPPORTED_ARCH" = "x1"],[
601 PPRINT_WARN([Your architecture ($host_cpu) is unsupported, using safe default of no unaligned access.])
605 PPRINT_SUBTITLE([Features])
608 test "x$with_sdt" = "xyes" && value=1 || value=0
609 PPRINT_PROP_BOOL_CUSTOM([sdt.h integration], $value, [use --with-sdt])
611 test "x$java_agent_jul" = xyes && value=1 || value=0
612 PPRINT_PROP_BOOL_CUSTOM([Java agent (JUL support)], $value, [use --enable-java-agent-jul])
614 test "x$java_agent_log4j" = xyes && value=1 || value=0
615 PPRINT_PROP_BOOL_CUSTOM([Java agent (Log4j support)], $value, [use --enable-java-agent-log4j])
617 test "x$jni_interface" = xyes && value=1 || value=0
618 PPRINT_PROP_BOOL_CUSTOM([JNI interface (JNI)], $value, [use --enable-jni-interface])
620 test "x$python_agent" = xyes && value=1 || value=0
621 PPRINT_PROP_BOOL_CUSTOM([Python agent], $value, [use --enable-python-agent])
623 test "x$have_perf_event" = "xyes" && value=1 || value=0
624 PPRINT_PROP_BOOL_CUSTOM([Perf event integration], $value)
626 test "x$enable_numa" = xyes && value=1 || value=0
627 PPRINT_PROP_BOOL([NUMA], $value)
632 test "x$enable_examples" = xyes && value=1 || value=0
633 PPRINT_PROP_BOOL([Build and install examples], $value, $PPRINT_COLOR_SUBTITLE)
635 # man pages build enabled/disabled
636 m4_pushdef([build_man_pages_msg], [Build and install man pages])
638 AS_IF([test "x$man_pages_opt" != "xno"], [
639 AS_IF([test "x$in_git_repo" = "xyes"], [
640 PPRINT_PROP_BOOL([build_man_pages_msg], 1, $PPRINT_COLOR_SUBTITLE)
642 AS_IF([test "x$have_asciidoc_xmlto" = "xyes"], [
643 PPRINT_PROP_BOOL([build_man_pages_msg], 1, $PPRINT_COLOR_SUBTITLE)
645 PPRINT_PROP_STRING([build_man_pages_msg],
646 [${PPRINT_COLOR_BLDGRN}yes (already built)],
647 $PPRINT_COLOR_SUBTITLE)
651 PPRINT_PROP_BOOL([build_man_pages_msg], 0, $PPRINT_COLOR_SUBTITLE)
654 m4_popdef([build_man_pages_msg])
658 report_bindir="`eval eval echo $bindir`"
659 report_libdir="`eval eval echo $libdir`"
661 # Print the bindir and libdir this `make install' will install into.
663 PPRINT_SUBTITLE([Install directories])
664 PPRINT_PROP_STRING([Binaries], [$report_bindir])
665 PPRINT_PROP_STRING([Libraries], [$report_libdir])
668 PPRINT_SUBTITLE([System directories])
670 PPRINT_PROP_STRING([lttng-sessiond rundir], [$lttng_system_rundir])
674 AS_IF([test "x$warn_prebuilt_man_pages" = "xyes" ], [
676 PPRINT_WARN([Both asciidoc and xmlto are needed to build the LTTng-UST man pages.
678 Note that the man pages are already built in this distribution tarball,
679 therefore asciidoc and xmlto are only needed if you intend to modify
682 Use --disable-man-pages to completely disable building and installing