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[apache] / configure.in
1 dnl
2 dnl Autoconf configuration for Apache httpd
3 dnl
4 dnl     Use ./buildconf to produce a configure script
5 dnl
6
7 AC_PREREQ(2.50)
8 AC_INIT(ABOUT_APACHE)
9
10 AC_CONFIG_HEADER(include/ap_config_auto.h)
11 AC_CONFIG_AUX_DIR(build)
12
13 dnl #
14 dnl # Include our own M4 macros along with those for APR and libtool
15 dnl #
16 sinclude(build/apr_common.m4)
17 sinclude(build/find_apr.m4)
18 sinclude(build/find_apu.m4)
19 sinclude(acinclude.m4)
20
21 dnl Later versions of autoconf (>= 2.62) by default cause the produced
22 dnl configure script to emit at least warnings when it comes across unknown
23 dnl command line options. These versions also have the macro
24 dnl AC_DISABLE_OPTION_CHECKING defined which turns this off by default.
25 dnl We want to have this turned off here since our configure calls can
26 dnl contain options for APR / APR-UTIL configure that are unknown to us.
27 dnl So avoid confusing the user by turning this off. See also PR 45221.
28 ifdef([AC_DISABLE_OPTION_CHECKING], [AC_DISABLE_OPTION_CHECKING])
29
30 dnl XXX we can't just use AC_PREFIX_DEFAULT because that isn't subbed in
31 dnl by configure until it is too late.  Is that how it should be or not?
32 dnl Something seems broken here.                                               
33 AC_PREFIX_DEFAULT(/usr/local/apache2)
34
35 dnl Get the layout here, so we can pass the required variables to apr
36 APR_ENABLE_LAYOUT(Apache, [errordir iconsdir htdocsdir cgidir])
37
38 dnl reparse the configure arguments.
39 APR_PARSE_ARGUMENTS
40
41 dnl export expanded and relative configure argument variables
42 APACHE_EXPORT_ARGUMENTS
43
44 dnl Save user-defined environment settings for later restoration
45 dnl
46 APR_SAVE_THE_ENVIRONMENT(CPPFLAGS)
47 APR_SAVE_THE_ENVIRONMENT(CFLAGS)
48 APR_SAVE_THE_ENVIRONMENT(CXXFLAGS)
49 APR_SAVE_THE_ENVIRONMENT(LDFLAGS)
50 APR_SAVE_THE_ENVIRONMENT(LIBS)
51 APR_SAVE_THE_ENVIRONMENT(INCLUDES)
52
53 dnl Generate ./config.nice for reproducing runs of configure
54 dnl
55 APR_CONFIG_NICE(config.nice)
56
57 nl='
58 '
59 dnl Check that mkdir -p works
60 APR_MKDIR_P_CHECK($top_srcdir/build/mkdir.sh)
61
62 dnl ## Run configure for packages Apache uses
63
64 dnl shared library support for these packages doesn't currently
65 dnl work on some platforms
66
67 AC_CANONICAL_SYSTEM
68
69 orig_prefix="$prefix"
70
71 echo $ac_n "${nl}Configuring Apache Portable Runtime library ...${nl}"
72
73 AC_ARG_WITH(included-apr,
74 APACHE_HELP_STRING(--with-included-apr,Use bundled copies of APR/APR-Util))
75
76 # Only APR 1.x is supported.
77 apr_version=1
78
79 if test "x$with_included_apr" = "xyes"; then
80    apr_found=reconfig
81    apr_config="$srcdir/srclib/apr/apr-${apr_version}-config"
82 else 
83    APR_FIND_APR("$srcdir/srclib/apr", "./srclib/apr", 1, ${apr_version})
84 fi
85
86 if test "$apr_found" = "no"; then
87   AC_MSG_ERROR([APR not found.  Please read the documentation.])
88 fi
89
90 if test "$apr_found" = "reconfig"; then
91   APR_SUBDIR_CONFIG(srclib/apr,
92                     [$apache_apr_flags --prefix=$prefix --exec-prefix=$exec_prefix --libdir=$libdir --includedir=$includedir --bindir=$bindir --datadir=$datadir --with-installbuilddir=$installbuilddir],
93                     [--enable-layout=*|\'--enable-layout=*])
94   dnl We must be the first to build and the last to be cleaned
95   AP_BUILD_SRCLIB_DIRS="apr $AP_BUILD_SRCLIB_DIRS"
96   AP_CLEAN_SRCLIB_DIRS="$AP_CLEAN_SRCLIB_DIRS apr"
97 fi
98
99 APR_SETIFNULL(CC, `$apr_config --cc`)
100 APR_SETIFNULL(CPP, `$apr_config --cpp`)
101 APR_ADDTO(CFLAGS, `$apr_config --cflags`)
102 APR_ADDTO(CPPFLAGS, `$apr_config --cppflags`)
103 APR_ADDTO(LDFLAGS, `$apr_config --ldflags`)
104 SHLIBPATH_VAR=`$apr_config --shlib-path-var`
105 APR_BINDIR=`$apr_config --bindir`
106 APR_INCLUDEDIR=`$apr_config --includedir`
107 APR_INCLUDES=`$apr_config --includes`
108 APR_VERSION=`$apr_config --version`
109 APR_CONFIG="$APR_BINDIR/apr-`echo ${APR_VERSION} | sed 's,\..*,,'`-config"
110
111 echo $ac_n "${nl}Configuring Apache Portable Runtime Utility library...${nl}"
112
113 # Only APR-util 1.x is supported.
114 apu_version=1
115
116 if test "x$with_included_apr" = "xyes"; then
117    apu_found=reconfig
118    apu_config="${srcdir}/srclib/apr-util/apu-${apu_version}-config"
119 else 
120    APR_FIND_APU("$srcdir/srclib/apr-util", "./srclib/apr-util", 1, ${apu_version})
121 fi
122
123 if test "$apu_found" = "no"; then
124   AC_MSG_ERROR([APR-util not found.  Please read the documentation.])
125 fi
126
127 # Catch some misconfigurations:
128 case ${apr_found}.${apu_found} in
129 reconfig.yes)
130   AC_MSG_ERROR([Cannot use an external APR-util with the bundled APR])
131   ;;
132 yes.reconfig)
133   AC_MSG_ERROR([Cannot use an external APR with the bundled APR-util])
134   ;;
135 esac  
136
137 if test "$apu_found" = "reconfig"; then
138   APR_SUBDIR_CONFIG(srclib/apr-util,
139                     [--with-apr=../apr --prefix=$prefix --exec-prefix=$exec_prefix --libdir=$libdir --includedir=$includedir --bindir=$bindir],
140                     [--enable-layout=*|\'--enable-layout=*])
141   dnl We must be the last to build and the first to be cleaned
142   AP_BUILD_SRCLIB_DIRS="$AP_BUILD_SRCLIB_DIRS apr-util"
143   AP_CLEAN_SRCLIB_DIRS="apr-util $AP_CLEAN_SRCLIB_DIRS"
144 fi
145
146 APR_ADDTO(LDFLAGS, `$apu_config --ldflags`)
147 APU_BINDIR=`$apu_config --bindir`
148 APU_INCLUDEDIR=`$apu_config --includedir`
149 APU_INCLUDES=`$apu_config --includes`
150 APU_VERSION=`$apu_config --version`
151 APU_CONFIG="$APU_BINDIR/apu-`echo ${APU_VERSION} | sed 's,\..*,,'`-config"
152
153 dnl In case we picked up CC and CPP from APR, get that info into the
154 dnl config cache so that PCRE uses it.  Otherwise, CC and CPP used for
155 dnl PCRE and for our config tests will be whatever PCRE determines.
156 AC_PROG_CC
157 AC_PROG_CPP
158
159 if test "x${cache_file}" = "x/dev/null"; then
160   # Likewise, ensure that CC and CPP are passed through to the pcre
161   # configure script iff caching is disabled (the autoconf 2.5x default).
162   export CC; export CPP
163 fi
164
165 dnl Absolute source/build directory
166 abs_srcdir=`(cd $srcdir && pwd)`
167 abs_builddir=`pwd`
168
169 AC_ARG_WITH(pcre,
170 APACHE_HELP_STRING(--with-pcre=PATH,Use external PCRE library))
171
172 AC_PATH_PROG(PCRE_CONFIG, pcre-config, false)
173 if test -d "$with_pcre" && test -x "$with_pcre/bin/pcre-config"; then
174    PCRE_CONFIG=$with_pcre/bin/pcre-config
175 elif test -x "$with_pcre"; then
176    PCRE_CONFIG=$with_pcre
177 fi
178
179 if test "$PCRE_CONFIG" != "false"; then
180   if $PCRE_CONFIG --version >/dev/null 2>&1; then :; else
181     AC_MSG_ERROR([Did not find pcre-config script at $PCRE_CONFIG])
182   fi
183   AC_MSG_NOTICE([Using external PCRE library from $PCRE_CONFIG])
184   APR_ADDTO(PCRE_INCLUDES, [`$PCRE_CONFIG --cflags`])
185   APR_ADDTO(PCRE_LIBS, [`$PCRE_CONFIG --libs`])
186 else
187   AC_MSG_ERROR([pcre-config for libpcre not found. PCRE is required and available from http://pcre.org/])
188 fi
189 APACHE_SUBST(PCRE_LIBS)
190
191 dnl Add PCRE_LIBS to HTTPD_LDFLAGS
192 APR_ADDTO(HTTPD_LDFLAGS, [\$(PCRE_LIBS)])
193
194 echo $ac_n "${nl}Configuring Apache httpd ...${nl}"
195
196 dnl If the source dir is not equal to the build dir, 
197 dnl then we are running in VPATH mode.
198
199 APR_ADDTO(INCLUDES, [-I.])
200
201 if test "$abs_builddir" != "$abs_srcdir"; then
202   APR_ADDTO(INCLUDES, [-I\$(top_builddir)/include])
203 fi
204
205 APR_ADDTO(INCLUDES, [-I\$(top_srcdir)/os/\$(OS_DIR) -I\$(top_srcdir)/server/mpm/\$(MPM_SUBDIR_NAME) -I\$(top_srcdir)/modules/http -I\$(top_srcdir)/modules/aaa -I\$(top_srcdir)/modules/filters -I\$(top_srcdir)/modules/proxy -I\$(top_srcdir)/modules/session -I\$(top_srcdir)/include -I\$(top_srcdir)/modules/generators -I\$(top_srcdir)/modules/mappers -I\$(top_srcdir)/modules/database])
206
207 # apr/apr-util --includes may pick up system paths for dependent
208 # libraries, so ensure these are later in INCLUDES than local source
209 # directories.
210 APR_ADDTO(INCLUDES, $APR_INCLUDES)
211 APR_ADDTO(INCLUDES, $APU_INCLUDES)
212
213 dnl Add in path to PCRE includes
214 APR_ADDTO(INCLUDES, $PCRE_INCLUDES)
215
216 echo $ac_n "${nl}Applying OS-specific hints for httpd ...${nl}"
217
218 case $host in
219   *os2*)
220       # Use a custom made libtool replacement
221       echo "using aplibtool"
222       LIBTOOL="$abs_srcdir/srclib/apr/build/aplibtool"
223       SH_LIBTOOL="$LIBTOOL --shared --export-all"
224       SH_LIBS="\$(ALL_LIBS)"
225       CORE_IMPLIB_FILE="ApacheCoreOS2.la"
226       CORE_IMPLIB="$abs_srcdir/server/$CORE_IMPLIB_FILE"
227       MK_IMPLIB="emximp"
228       other_targets="$other_targets os2core"
229       INSTALL_PROG_FLAGS="-e .exe"
230       SHLTCFLAGS=""
231       LTCFLAGS=""
232       ;;
233   *)
234       if test "x$LTFLAGS" = "x"; then
235           LTFLAGS='--silent'
236       fi
237       my_libtool=`$apr_config --apr-libtool`
238       LIBTOOL="$my_libtool \$(LTFLAGS)"
239       libtoolversion=`$my_libtool --version`
240       case $libtoolversion in
241           *1.[[45]]* | *[[2-9]].[[0-9]]*)
242               SH_LIBTOOL='$(LIBTOOL)'
243               SHLTCFLAGS="-prefer-pic"
244               LTCFLAGS="-prefer-non-pic -static"
245               ;;
246           *)
247               SH_LIBTOOL='$(SHELL) $(top_builddir)/shlibtool $(LTFLAGS)'
248               SHLTCFLAGS=""
249               LTCFLAGS=""
250               ;;
251       esac
252       ;;
253 esac
254 APACHE_SUBST(SHLTCFLAGS)
255 APACHE_SUBST(LTCFLAGS)
256
257 case $host in
258   *-apple-aux3*)
259       APR_SETVAR(APACHE_MPM, [prefork])
260       APR_SETVAR(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, [1])
261       ;;
262   *-beos*)
263       APR_SETVAR(APACHE_MPM, [beos])
264       APR_SETVAR(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, [1])
265       ;;
266   *os2-emx*)
267       APR_SETVAR(APACHE_MPM, [mpmt_os2])
268       APR_SETVAR(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, [1])
269       ;;
270   *-linux-*)
271       case `uname -r` in
272         2.[[2-9]]* ) 
273             APR_SETVAR(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, [1])
274             ;;
275         * )
276             ;;
277       esac
278       ;;
279   *486-*-bsdi* | *-netbsd* | *-freebsd* | *-apple-darwin* | *-dec-osf* | *-qnx)
280       APR_SETVAR(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, [1])
281       ;;
282   *-solaris2*)
283       dnl This is a hack -- we should be using AC_TRY_RUN instead
284       ap_platform_runtime_link_flag="-R"
285       dnl solaris 8 and above don't have a thundering herd
286       dnl not sure about rev's before this one.
287       case `uname -r` in
288         5.[567]*)
289             ;;
290         * )
291             APR_SETVAR(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, [1])
292             ;;
293       esac
294       ;;
295   *cygwin*)
296       APR_SETVAR(APACHE_MPM, [prefork])
297       APR_SETVAR(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, [1])
298       ;;
299   *mingw32*)
300       APR_SETVAR(APACHE_MPM, [winnt])
301       APR_ADDTO(CPPFLAGS, [-DAP_DECLARE_EXPORT])
302       APR_SETIFNULL(ac_cv_func_times, [no])
303       APR_SETIFNULL(ac_cv_func_getpwnam, [no])
304       APR_SETIFNULL(ac_cv_func_getgrnam, [no])
305       ;;
306   *aix*)
307       aixver=`echo $host | sed 's/^[[^0-9]]*//' | sed 's/\.//g'`
308       if test $aixver -ge 4320; then
309         APR_SETVAR(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, [1])
310       fi
311       ;;
312   *os390*)
313       APR_SETVAR(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, [1])
314       ;;
315 esac
316
317 APR_SETVAR(AP_NONBLOCK_WHEN_MULTI_LISTEN, [1])
318
319 dnl
320 dnl Process command line arguments. This is done early in the process so the
321 dnl user can get feedback quickly in case of an error.
322 dnl
323 dnl ### need to move some of the arguments "up here"
324
325 dnl ## Check for programs
326
327 AC_PATH_PROG(RM, rm)
328 AC_PATH_PROG(PKGCONFIG, pkg-config)
329 AC_PATH_PROG(RSYNC, rsync)
330 AC_PROG_AWK
331 AC_PROG_LN_S
332 AC_CHECK_TOOL(RANLIB, ranlib, true)
333 dnl AC_PATH_PROG(PERL_PATH, perl)
334 AC_CHECK_PROGS(LYNX_PATH,[lynx links elinks], [lynx])
335
336 # Hard-coded install programs
337 MKINSTALLDIRS="\$(abs_srcdir)/build/mkdir.sh"
338 INSTALL="\$(LIBTOOL) --mode=install \$(abs_srcdir)/build/install.sh -c"
339 APACHE_SUBST(MKINSTALLDIRS)
340 APACHE_SUBST(INSTALL)
341
342 dnl Various OS checks that apparently set required flags
343 ifdef([AC_USE_SYSTEM_EXTENSIONS], [
344 AC_USE_SYSTEM_EXTENSIONS
345 ], [
346 AC_AIX
347 AC_MINIX
348 ])
349
350 AC_ISC_POSIX
351
352 # Ensure that satisfactory versions of apr and apr-util are 
353 # found if external copies are configured.
354 if test "${apr_found}" = "yes"; then
355   # Require APR 1.3.x otherwise fail
356   APACHE_CHECK_APxVER([apr], 1, 3)
357 fi
358
359 if test "${apu_found}" = "yes"; then
360   # Require APR-util 1.3.x otherwise fail
361   APACHE_CHECK_APxVER([apu], 1, 3)
362 fi
363
364 dnl Check for what we can generate dependency files with
365 APR_CHECK_DEPEND
366
367 dnl ## Check for libraries
368
369 dnl ## Check for header files
370
371 dnl I think these are just used all over the place, so just check for
372 dnl them at the base of the tree. If some are specific to a single
373 dnl directory, they should be moved (Comment #Spoon)
374
375 dnl Regarding standard header files: AC_HEADER_STDC doesn't set symbols
376 dnl HAVE_STRING_H, HAVE_STDLIB_H, etc., so those are checked for
377 dnl explicitly so that the normal HAVE_xxx_H symbol is defined.
378
379 AC_HEADER_STDC
380 AC_CHECK_HEADERS( \
381 string.h \
382 limits.h \
383 unistd.h \
384 sys/socket.h \
385 pwd.h \
386 grp.h \
387 strings.h \
388 sys/prctl.h \
389 sys/processor.h \
390 sys/sem.h \
391 sys/sdt.h
392 )
393 AC_HEADER_SYS_WAIT
394
395 dnl ## Check for typedefs, structures, and compiler characteristics.
396
397 AC_C_CONST
398
399 dnl ## Check for library functions
400 dnl ## sqrt() only needed in support/ab.c
401 saved_LIBS="$LIBS"
402 LIBS=""
403 AC_SEARCH_LIBS(sqrt, m)
404 MATH_LIBS="$LIBS"
405 APACHE_SUBST(MATH_LIBS)
406 LIBS="$saved_LIBS"
407
408 dnl See Comment #Spoon
409
410 AC_CHECK_FUNCS( \
411 getpwnam \
412 getgrnam \
413 initgroups \
414 bindprocessor \
415 prctl \
416 timegm \
417 getpgid
418 )
419
420 dnl confirm that a void pointer is large enough to store a long integer
421 APACHE_CHECK_VOID_PTR_LEN
422
423 dnl ## Check for the tm_gmtoff field in struct tm to get the timezone diffs
424 AC_CACHE_CHECK([for tm_gmtoff in struct tm], ac_cv_struct_tm_gmtoff,
425 [AC_TRY_COMPILE([#include <sys/types.h>
426 #include <time.h>], [struct tm tm; tm.tm_gmtoff;],
427   ac_cv_struct_tm_gmtoff=yes, ac_cv_struct_tm_gmtoff=no)])
428 if test "$ac_cv_struct_tm_gmtoff" = "yes"; then
429     AC_DEFINE(HAVE_GMTOFF, 1, [Define if struct tm has a tm_gmtoff field])
430 fi
431
432 dnl ## Set up any appropriate OS-specific environment variables for apachectl
433
434 case $host in
435     *aix*)
436         # for 32-bit builds, increase MAXDATA to allow lots of threads
437         if test x$OBJECT_MODE != x64; then
438             OS_SPECIFIC_VARS="LDR_CNTRL=\"MAXDATA=0x80000000\" ; export LDR_CNTRL ;"
439         fi
440         OS_SPECIFIC_VARS="$OS_SPECIFIC_VARS AIXTHREAD_SCOPE=S ; export AIXTHREAD_SCOPE"
441         OS_SPECIFIC_VARS="$OS_SPECIFIC_VARS ; AIXTHREAD_MUTEX_DEBUG=OFF ; export AIXTHREAD_MUTEX_DEBUG"
442         OS_SPECIFIC_VARS="$OS_SPECIFIC_VARS ; AIXTHREAD_RWLOCK_DEBUG=OFF ; export AIXTHREAD_RWLOCK_DEBUG"
443         OS_SPECIFIC_VARS="$OS_SPECIFIC_VARS ; AIXTHREAD_COND_DEBUG=OFF ; export AIXTHREAD_COND_DEBUG"
444         OS_SPECIFIC_VARS="$OS_SPECIFIC_VARS ; SPINLOOPTIME=1000 ; export SPINLOOPTIME"
445         OS_SPECIFIC_VARS="$OS_SPECIFIC_VARS ; YIELDLOOPTIME=8 ; export YIELDLOOPTIME"
446         OS_SPECIFIC_VARS="$OS_SPECIFIC_VARS ; MALLOCMULTIHEAP=considersize,heaps:8 ; export MALLOCMULTIHEAP"
447         ;;
448     *os390*)
449         OS_SPECIFIC_VARS="export _CEE_RUNOPTS=\"STACK(,,ANY)\" ; export _EDC_ADD_ERRNO2=1"
450         ;;
451     *)
452         OS_SPECIFIC_VARS=""
453 esac
454       
455 AC_ARG_WITH(port,APACHE_HELP_STRING(--with-port=PORT,Port on which to listen (default is 80)),
456         [if test "$withval" = "yes"; then AC_MSG_ERROR('option --with-port requires a value (the TCP port number)'); else PORT="$withval"; fi],
457         [PORT=80])
458
459 AC_ARG_WITH(sslport,APACHE_HELP_STRING(--with-sslport=SSLPORT,Port on which to securelisten (default is 443)),
460         [if test "$withval" = "yes"; then AC_MSG_ERROR('option --with-sslport requires a value (the SSL TCP port number)'); else SSLPORT="$withval"; fi],
461         [SSLPORT=443])
462
463 DTRACE=true
464 AC_ARG_ENABLE(dtrace,APACHE_HELP_STRING(--enable-dtrace,Enable DTrace probes),
465 [
466   enable_dtrace=$enableval
467   APR_ADDTO(CPPFLAGS, -DAPR_DTRACE_PROVIDER)
468   AC_MSG_ERROR('DTrace Support in the build system is not complete. Patches Welcome!')
469 ],
470 [
471   enable_dtrace=no
472 ])
473
474 dnl Disabled dtrace build for now.
475 enable_dtrace=no
476
477 case $host in
478   *-solaris2*)
479     if test $enable_dtrace = "yes" -a "$ac_cv_header_sys_sdt_h" = "yes"; then
480         AC_DEFINE(AP_ENABLE_DTRACE, 1,
481                   [Enable DTrace probes])
482         DTRACE="/usr/sbin/dtrace $DTRACEFLAGS"
483         test -f include/apache_probes.h || $DTRACE -h -s apache_probes.d -o include/apache_probes.h
484     fi
485     ;;
486 esac
487
488 APACHE_SUBST(DTRACE)
489
490 APR_CHECK_APR_DEFINE(APR_HAVE_IPV6)
491
492 AC_ARG_ENABLE(v4-mapped,APACHE_HELP_STRING(--enable-v4-mapped,Allow IPv6 sockets to handle IPv4 connections),
493
494   v4mapped=$enableval
495 ],
496 [
497     case $host in
498     *freebsd5*|*netbsd*|*openbsd*)
499         v4mapped=no
500         ;;
501     *)
502         v4mapped=yes
503         ;;
504 esac
505 ])
506
507 if test $v4mapped = "yes" -a $ac_cv_define_APR_HAVE_IPV6 = "yes"; then
508     AC_DEFINE(AP_ENABLE_V4_MAPPED, 1,
509               [Allow IPv4 connections on IPv6 listening sockets])
510 fi
511
512 AC_ARG_ENABLE(exception-hook,APACHE_HELP_STRING(--enable-exception-hook,Enable fatal exception hook),
513 [
514     AC_DEFINE(AP_ENABLE_EXCEPTION_HOOK, 1,
515               [Allow modules to run hook after a fatal exception])
516 ])dnl
517
518 AC_ARG_ENABLE(maintainer-mode,APACHE_HELP_STRING(--enable-maintainer-mode,Turn on debugging and compile time warnings),
519 [
520   APR_ADDTO(CPPFLAGS, -DAP_DEBUG)
521 ])dnl
522
523 dnl Conditionally enable PIE support for GNU toolchains.
524 AC_ARG_ENABLE(pie,APACHE_HELP_STRING(--enable-pie,Build httpd as a Position Independent Executable))
525 if test "$enable_pie" = "yes"; then
526    AC_CACHE_CHECK([whether $CC accepts PIE flags], [ap_cv_cc_pie], [
527      save_CFLAGS=$CFLAGS
528      save_LDFLAGS=$LDFLAGS
529      CFLAGS="$CFLAGS -fPIE"
530      LDFLAGS="$LDFLAGS -pie"
531      AC_TRY_RUN([static int foo[30000]; int main () { return 0; }],
532       [ap_cv_cc_pie=yes], [ap_cv_cc_pie=no], [ap_cv_cc_pie=yes])
533      CFLAGS=$save_CFLAGS
534      LDFLAGS=$save_LDFLAGS
535    ])
536    if test "$ap_cv_cc_pie" = "yes"; then
537      PICFLAGS="-fPIE"
538      PILDFLAGS="-pie"
539    else
540      AC_ERROR([--enable-pie requested but $CC failed using PIE flags])
541    fi
542 fi
543 AC_SUBST(PICFLAGS)
544 AC_SUBST(PILDFLAGS)
545
546 prefix="$orig_prefix"
547 APACHE_ENABLE_MODULES
548
549 dnl reading config stubs
550 esyscmd(./build/config-stubs .)
551
552 APACHE_SUBST(progname)
553 APACHE_SUBST(MPM_LIB)
554 APACHE_SUBST(OS)
555 APACHE_SUBST(OS_DIR)
556 APACHE_SUBST(BUILTIN_LIBS)
557 APACHE_SUBST(SHLIBPATH_VAR)
558 APACHE_SUBST(OS_SPECIFIC_VARS)
559
560 PRE_SHARED_CMDS='echo ""'
561 POST_SHARED_CMDS='echo ""'
562
563 dnl apache_need_shared tells us if Apache modules are being built as DSOs
564
565 if test "$apache_need_shared" = "yes"; then
566   if test -f $ac_aux_dir/ltconfig; then
567     $SHELL $ac_aux_dir/ltconfig --output=shlibtool --disable-static --srcdir=$ac_aux_dir --cache-file=./config.cache $ac_aux_dir/ltmain.sh
568   fi
569   shared_build="shared-build"
570 fi
571
572 dnl enable_so tells us if *any* modules can be built as DSOs
573
574 if test "$enable_so" = "yes"; then
575   case $host in
576     *-ibm-aix*)
577       APR_ADDTO(HTTPD_LDFLAGS, [-Wl,-uXML_Parse -Wl,-bE:$abs_builddir/server/httpd.exp])
578       APR_ADDTO(SH_LDFLAGS, [\$(EXTRA_LDFLAGS) \$(EXTRA_LIBS)])
579       APR_ADDTO(UTIL_LDFLAGS, [-Wl,-uXML_Parse])
580       ;;
581     *beos)
582       SH_LDFLAGS='$(top_builddir)/_APP_'
583       PRE_SHARED_CMDS='ln -s $(top_builddir)/httpd $(top_builddir)/_APP_'
584       POST_SHARED_CMDS='rm $(top_builddir)/_APP_'
585       ;;
586     *os390)
587       APR_ADDTO(HTTPD_LDFLAGS, [--main=$abs_srcdir/server/main.o --core-dll=$abs_srcdir/apachecore.dll])
588       APR_ADDTO(SH_LDFLAGS, [--core-dll=$abs_srcdir/apachecore.dll])
589   esac
590   MOD_SO_ENABLED=yes
591 fi
592 AC_SUBST(MOD_SO_ENABLED)
593
594 APACHE_SUBST(PRE_SHARED_CMDS)
595 APACHE_SUBST(POST_SHARED_CMDS)
596 APACHE_SUBST(shared_build)
597
598 AC_ARG_WITH(program-name,
599 APACHE_HELP_STRING(--with-program-name,alternate executable name),[
600   progname="$withval" ], [
601   progname="httpd"] )
602
603 # SuExec parameters
604 AC_ARG_WITH(suexec-bin,
605 APACHE_HELP_STRING(--with-suexec-bin,Path to suexec binary),[
606   AC_DEFINE_UNQUOTED(SUEXEC_BIN, "$withval", [Path to suexec binary] )
607 ] )
608
609 AC_ARG_WITH(suexec-caller,
610 APACHE_HELP_STRING(--with-suexec-caller,User allowed to call SuExec),[
611   AC_DEFINE_UNQUOTED(AP_HTTPD_USER, "$withval", [User allowed to call SuExec] ) ] )
612
613 AC_ARG_WITH(suexec-userdir,
614 APACHE_HELP_STRING(--with-suexec-userdir,User subdirectory),[
615   AC_DEFINE_UNQUOTED(AP_USERDIR_SUFFIX, "$withval", [User subdirectory] ) ] )
616
617 AC_ARG_WITH(suexec-docroot,
618 APACHE_HELP_STRING(--with-suexec-docroot,SuExec root directory),[
619   AC_DEFINE_UNQUOTED(AP_DOC_ROOT, "$withval", [SuExec root directory] ) ] )
620
621 AC_ARG_WITH(suexec-uidmin,
622 APACHE_HELP_STRING(--with-suexec-uidmin,Minimal allowed UID),[
623   AC_DEFINE_UNQUOTED(AP_UID_MIN, $withval, [Minimum allowed UID] ) ] )
624
625 AC_ARG_WITH(suexec-gidmin,
626 APACHE_HELP_STRING(--with-suexec-gidmin,Minimal allowed GID),[
627   AC_DEFINE_UNQUOTED(AP_GID_MIN, $withval, [Minimum allowed GID] ) ] )
628
629 AC_ARG_WITH(suexec-logfile,
630 APACHE_HELP_STRING(--with-suexec-logfile,Set the logfile),[
631   AC_DEFINE_UNQUOTED(AP_LOG_EXEC, "$withval", [SuExec log file] ) ] )
632
633 AC_ARG_WITH(suexec-safepath,
634 APACHE_HELP_STRING(--with-suexec-safepath,Set the safepath),[
635   AC_DEFINE_UNQUOTED(AP_SAFE_PATH, "$withval", [safe shell path for SuExec] ) ] )
636
637 AC_ARG_WITH(suexec-umask,
638 APACHE_HELP_STRING(--with-suexec-umask,umask for suexec'd process),[
639   AC_DEFINE_UNQUOTED(AP_SUEXEC_UMASK, 0$withval, [umask for suexec'd process] ) ] )
640
641 dnl APR should go after the other libs, so the right symbols can be picked up
642 AP_LIBS="$AP_LIBS `$apu_config --avoid-ldap --link-libtool --libs`"
643 AP_LIBS="$AP_LIBS `$apr_config --link-libtool --libs`" 
644 APACHE_SUBST(AP_LIBS)
645 APACHE_SUBST(AP_BUILD_SRCLIB_DIRS)
646 APACHE_SUBST(AP_CLEAN_SRCLIB_DIRS)
647
648 AC_DEFINE(AP_USING_AUTOCONF, 1,
649                 [Using autoconf to configure Apache])
650
651 if test "$SINGLE_LISTEN_UNSERIALIZED_ACCEPT" = "1"; then
652     AC_DEFINE(SINGLE_LISTEN_UNSERIALIZED_ACCEPT, 1, 
653               [This platform doesn't suffer from the thundering herd problem])
654 fi
655
656 if test "$AP_NONBLOCK_WHEN_MULTI_LISTEN" = "1"; then
657     AC_DEFINE(AP_NONBLOCK_WHEN_MULTI_LISTEN, 1, 
658               [Listening sockets are non-blocking when there are more than 1])
659 fi
660
661
662 APACHE_FAST_OUTPUT(Makefile modules/Makefile srclib/Makefile) 
663 APACHE_FAST_OUTPUT(os/Makefile server/Makefile)
664 APACHE_FAST_OUTPUT(support/Makefile)
665
666 if test -d ./test; then
667     APACHE_FAST_OUTPUT(test/Makefile)
668 fi
669
670 dnl ## Finalize the variables
671 echo $ac_n "${nl}Restore user-defined environment settings...${nl}"
672
673 APR_RESTORE_THE_ENVIRONMENT(CPPFLAGS, EXTRA_)
674 APR_RESTORE_THE_ENVIRONMENT(CFLAGS, EXTRA_)
675 APR_RESTORE_THE_ENVIRONMENT(CXXFLAGS, EXTRA_)
676 APR_RESTORE_THE_ENVIRONMENT(LDFLAGS, EXTRA_)
677 APR_RESTORE_THE_ENVIRONMENT(LIBS, EXTRA_)
678 APR_RESTORE_THE_ENVIRONMENT(INCLUDES, EXTRA_)
679
680 echo $ac_n "${nl}Construct makefiles and header files...${nl}"
681
682 APACHE_GEN_CONFIG_VARS
683
684 dnl ## Build modules.c
685 rm -f modules.c
686 echo $MODLIST | $AWK -f $srcdir/build/build-modules-c.awk > modules.c
687
688 APR_EXPAND_VAR(ap_prefix, $prefix)
689 AC_DEFINE_UNQUOTED(HTTPD_ROOT, "${ap_prefix}",
690         [Root directory of the Apache install area])
691 AC_DEFINE_UNQUOTED(SERVER_CONFIG_FILE, "${rel_sysconfdir}/${progname}.conf",
692         [Location of the config file, relative to the Apache root directory])
693 AC_DEFINE_UNQUOTED(AP_TYPES_CONFIG_FILE, "${rel_sysconfdir}/mime.types",
694         [Location of the MIME types config file, relative to the Apache root directory])
695 AC_DEFINE_UNQUOTED(APACHE_MPM_DIR, "$MPM_DIR",
696         [Location of the source for the current MPM])
697
698 perlbin=`$ac_aux_dir/PrintPath perl`
699 if test "x$perlbin" = "x"; then
700     perlbin="/replace/with/path/to/perl/interpreter"
701 fi
702 AC_SUBST(perlbin)
703
704 dnl If we are running on BSD/OS, we need to use the BSD .include syntax.
705
706 BSD_MAKEFILE=no
707 ap_make_include=include
708 ap_make_delimiter=' '
709 case $host in
710 *bsdi*)
711     # Check whether they've installed GNU make
712     if make --version > /dev/null 2>&1; then
713         true
714     else
715         BSD_MAKEFILE=yes
716         ap_make_include=.include
717         ap_make_delimiter='"'
718     fi
719     ;;
720 esac
721 AC_SUBST(ap_make_include)
722 AC_SUBST(ap_make_delimiter)
723
724 dnl Ensure that docs/conf is created.
725 test -d docs/conf||$mkdir_p docs/conf
726
727 dnl Ensure that the httpd version is included
728 HTTPD_VERSION=`$abs_srcdir/build/get-version.sh all $abs_srcdir/include/ap_release.h AP_SERVER`
729 AC_SUBST(HTTPD_VERSION)
730
731 AC_OUTPUT($APACHE_OUTPUT_FILES docs/conf/httpd.conf docs/conf/extra/httpd-autoindex.conf docs/conf/extra/httpd-dav.conf docs/conf/extra/httpd-default.conf docs/conf/extra/httpd-info.conf docs/conf/extra/httpd-languages.conf docs/conf/extra/httpd-manual.conf docs/conf/extra/httpd-mpm.conf docs/conf/extra/httpd-multilang-errordoc.conf docs/conf/extra/httpd-ssl.conf docs/conf/extra/httpd-userdir.conf docs/conf/extra/httpd-vhosts.conf include/ap_config_layout.h support/apxs support/apachectl support/dbmmanage support/envvars-std support/log_server_status support/logresolve.pl support/phf_abuse_log.cgi support/split-logfile build/rules.mk build/pkg/pkginfo build/config_vars.sh,[true],[
732   APACHE_GEN_MAKEFILES
733 ])
734
735 case $MPM_SUBDIR_NAME in
736 *experimental*)
737     echo ""
738     echo ""
739     echo "============================================================"
740     echo "    WARNING: THE '${APACHE_MPM}' MPM IS EXPERIMENTAL"
741     echo "============================================================"
742     echo " The selected MPM might not be fully functional!"
743     echo ""
744     echo " Development of this MPM is not complete. Do not use this"
745     echo " MPM unless you are a programmer willing to help fix it."
746     echo ""
747     echo " If you are looking for a stable server, you should not use"
748     echo " the '${APACHE_MPM}' MPM until it is moved out of experimental."
749     echo "============================================================"
750     echo ""
751     echo ""
752     ;;
753 esac