1 dnl Helper Functions for the RRDtool configure.ac script
3 dnl this file gets included into aclocal.m4 when runnning aclocal
7 dnl Check for the presence of a particular library and its header files
8 dnl if this check fails set the environment variable EX_CHECK_ALL_ERR to YES
9 dnl and prints out a helful message
12 dnl EX_CHECK_ALL(library, function, header, pkgconf name, tested-version, homepage, cppflags)
13 dnl $1 $2 $3 $4 $5 $6 $7
16 AC_DEFUN([EX_CHECK_ALL],
20 ex_check_save_LIBS=${LIBS}
21 ex_check_save_CPPFLAGS=${CPPFLAGS}
22 ex_check_save_LDFLAGS=${LDFLAGS}
23 if test "x$7" != "x"; then
24 CPPFLAGS="$CPPFLAGS -I$7"
26 dnl try compiling naked first
28 AC_CHECK_HEADER($3,[LIBS="-l$1 ${LIBS}";EX_CHECK_STATE=YES],[])],[])
29 if test $EX_CHECK_STATE = NO; then
30 dnl now asking pkg-config for help
31 AC_CHECK_PROGS(PKGCONFIG,[pkg-config],no)
32 if test "$PKGCONFIG" != "no"; then
33 if $PKGCONFIG --exists $4; then
34 CPPFLAGS=${CPPFLAGS}" "`$PKGCONFIG --cflags $4`
35 LDFLAGS=${LDFLAGS}" "`$PKGCONFIG --libs-only-L $4`
36 LDFLAGS=${LDFLAGS}" "`$PKGCONFIG --libs-only-other $4`
37 LIBS=${LIBS}" "`$PKGCONFIG --libs-only-l $4`
38 dnl remove the cached value and test again
39 unset ac_cv_lib_`echo $1 | sed ['s/[^_a-zA-Z0-9]/_/g;s/^[0-9]/_/']`_$2
41 unset ac_cv_header_`echo $3 | sed ['s/[^_a-zA-Z0-9]/_/g;s/^[0-9]/_/']`
42 AC_CHECK_HEADER($3,[EX_CHECK_STATE=YES],[])
46 ----------------------------------------------------------------------------
47 * I found a copy of pkgconfig, but there is no $4.pc file around.
48 You may want to set the PKG_CONFIG_PATH variable to point to its
50 ----------------------------------------------------------------------------
56 if test ${EX_CHECK_STATE} = NO; then
58 ----------------------------------------------------------------------------
59 * I could not find a working copy of $4. Check config.log for hints on why
60 this is the case. Maybe you need to set LDFLAGS and CPPFLAGS appropriately
61 so that compiler and the linker can find lib$1 and its header files. If
62 you have not installed $4, you can get it either from its original home on
66 You can find also find an archive copy on
68 http://oss.oetiker.ch/rrdtool/pub/libs
70 The last tested version of $4 is $5.
76 ----------------------------------------------------------------------------
79 LIBS="${ex_check_save_LIBS}"
80 CPPFLAGS="${ex_check_save_CPPFLAGS}"
81 LDFLAGS="${ex_check_save_LDFLAGS}"
88 dnl Ptherad check from http://autoconf-archive.cryp.to/acx_pthread.m4
90 dnl @synopsis ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
92 dnl This macro figures out how to build C programs using POSIX threads.
93 dnl It sets the PTHREAD_LIBS output variable to the threads library and
94 dnl linker flags, and the PTHREAD_CFLAGS output variable to any special
95 dnl C compiler flags that are needed. (The user can also force certain
96 dnl compiler flags/libs to be tested by setting these environment
99 dnl Also sets PTHREAD_CC to any special C compiler that is needed for
100 dnl multi-threaded programs (defaults to the value of CC otherwise).
101 dnl (This is necessary on AIX to use the special cc_r compiler alias.)
103 dnl NOTE: You are assumed to not only compile your program with these
104 dnl flags, but also link it with them as well. e.g. you should link
105 dnl with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS
108 dnl If you are only building threads programs, you may wish to use
109 dnl these variables in your default LIBS, CFLAGS, and CC:
111 dnl LIBS="$PTHREAD_LIBS $LIBS"
112 dnl CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
115 dnl In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute
116 dnl constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to
117 dnl that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
119 dnl ACTION-IF-FOUND is a list of shell commands to run if a threads
120 dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to
121 dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the
122 dnl default action will define HAVE_PTHREAD.
124 dnl Please let the authors know if this macro fails on any platform, or
125 dnl if you have any other suggestions or comments. This macro was based
126 dnl on work by SGJ on autoconf scripts for FFTW (www.fftw.org) (with
127 dnl help from M. Frigo), as well as ac_pthread and hb_pthread macros
128 dnl posted by Alejandro Forero Cuervo to the autoconf macro repository.
129 dnl We are also grateful for the helpful feedback of numerous users.
131 dnl @category InstalledPackages
132 dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
133 dnl @version 2005-01-14
134 dnl @license GPLWithACException
136 AC_DEFUN([ACX_PTHREAD], [
137 AC_REQUIRE([AC_CANONICAL_HOST])
141 # We used to check for pthread.h first, but this fails if pthread.h
142 # requires special compiler flags (e.g. on True64 or Sequent).
143 # It gets checked for in the link test anyway.
145 # First of all, check if the user has set any of the PTHREAD_LIBS,
146 # etcetera environment variables, and if threads linking works using
148 if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
149 save_CFLAGS="$CFLAGS"
150 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
152 LIBS="$PTHREAD_LIBS $LIBS"
153 AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
154 AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
155 AC_MSG_RESULT($acx_pthread_ok)
156 if test x"$acx_pthread_ok" = xno; then
161 CFLAGS="$save_CFLAGS"
164 # We must check for the threads library under a number of different
165 # names; the ordering is very important because some systems
166 # (e.g. DEC) have both -lpthread and -lpthreads, where one of the
167 # libraries is broken (non-POSIX).
169 # Create a list of thread flags to try. Items starting with a "-" are
170 # C compiler flags, and other items are library names, except for "none"
171 # which indicates that we try without any flags at all, and "pthread-config"
172 # which is a program returning the flags for the Pth emulation library.
174 acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
176 # The ordering *is* (sometimes) important. Some notes on the
177 # individual items follow:
179 # pthreads: AIX (must check this before -lpthread)
180 # none: in case threads are in libc; should be tried before -Kthread and
181 # other compiler flags to prevent continual compiler warnings
182 # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
183 # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
184 # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
185 # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
186 # -pthreads: Solaris/gcc
187 # -mthreads: Mingw32/gcc, Lynx/gcc
188 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
189 # doesn't hurt to check since this sometimes defines pthreads too;
190 # also defines -D_REENTRANT)
191 # pthread: Linux, etcetera
192 # --thread-safe: KAI C++
193 # pthread-config: use pthread-config program (for GNU Pth library)
195 case "${host_cpu}-${host_os}" in
198 # On Solaris (at least, for some versions), libc contains stubbed
199 # (non-functional) versions of the pthreads routines, so link-based
200 # tests will erroneously succeed. (We need to link with -pthread or
201 # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
202 # a function called by this macro, so we could check for that, but
203 # who knows whether they'll stub that too in a future libc.) So,
204 # we'll just look for -pthreads and -lpthread first:
206 acx_pthread_flags="-pthread -pthreads pthread -mt $acx_pthread_flags"
210 if test x"$acx_pthread_ok" = xno; then
211 for flag in $acx_pthread_flags; do
215 AC_MSG_CHECKING([whether pthreads work without any flags])
219 AC_MSG_CHECKING([whether pthreads work with $flag])
220 PTHREAD_CFLAGS="$flag"
224 AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)
225 if test x"$acx_pthread_config" = xno; then continue; fi
226 PTHREAD_CFLAGS="`pthread-config --cflags`"
227 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
231 AC_MSG_CHECKING([for the pthreads library -l$flag])
232 PTHREAD_LIBS="-l$flag"
237 save_CFLAGS="$CFLAGS"
238 LIBS="$PTHREAD_LIBS $LIBS"
239 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
241 # Check for various functions. We must include pthread.h,
242 # since some functions may be macros. (On the Sequent, we
243 # need a special flag -Kthread to make this header compile.)
244 # We check for pthread_join because it is in -lpthread on IRIX
245 # while pthread_create is in libc. We check for pthread_attr_init
246 # due to DEC craziness with -lpthreads. We check for
247 # pthread_cleanup_push because it is one of the few pthread
248 # functions on Solaris that doesn't have a non-functional libc stub.
249 # We try pthread_create on general principles.
250 AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], [[pthread_t th; pthread_join(th, 0);
251 pthread_attr_init(0); pthread_cleanup_push(0, 0);
252 pthread_create(0,0,0,0); pthread_cleanup_pop(0); ]])],[acx_pthread_ok=yes],[])
255 CFLAGS="$save_CFLAGS"
257 AC_MSG_RESULT($acx_pthread_ok)
258 if test "x$acx_pthread_ok" = xyes; then
267 # Various other checks:
268 if test "x$acx_pthread_ok" = xyes; then
270 LIBS="$PTHREAD_LIBS $LIBS"
271 save_CFLAGS="$CFLAGS"
272 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
274 # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
275 AC_MSG_CHECKING([for joinable pthread attribute])
277 for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
278 AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], [[int attr=$attr;]])],[attr_name=$attr; break],[])
280 AC_MSG_RESULT($attr_name)
281 if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
282 AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,
283 [Define to necessary symbol if this constant
284 uses a non-standard name on your system.])
287 AC_MSG_CHECKING([if more special flags are required for pthreads])
289 case "${host_cpu}-${host_os}" in
290 *-aix* | *-freebsd* | *-darwin*) x_rflag="-D_THREAD_SAFE";;
291 *solaris* | *-osf* | *-hpux*) x_rflag="-D_REENTRANT";;
292 *-linux* | *-k*bsd*-gnu*)
293 if test x"$PTHREAD_CFLAGS" = "x-pthread"; then
294 # For Linux/gcc "-pthread" implies "-lpthread". We need, however, to make this explicit
295 # in PTHREAD_LIBS such that a shared library to be built properly depends on libpthread.
296 PTHREAD_LIBS="-lpthread $PTHREAD_LIBS"
299 AC_MSG_RESULT(${x_rflag})
300 if test "x$x_rflag" != xno; then
301 PTHREAD_CFLAGS="$x_rflag $PTHREAD_CFLAGS"
305 CFLAGS="$save_CFLAGS"
307 # More AIX lossage: must compile with cc_r
308 AC_CHECK_PROG(PTHREAD_CC, cc_r, cc_r, ${CC})
313 AC_SUBST(PTHREAD_LIBS)
314 AC_SUBST(PTHREAD_CFLAGS)
317 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
318 if test x"$acx_pthread_ok" = xyes; then
319 ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
330 dnl determine how to get IEEE math working
331 dnl AC_IEEE(MESSAGE, set rd_cv_ieee_[var] variable, INCLUDES,
332 dnl FUNCTION-BODY, [ACTION-IF-FOUND [,ACTION-IF-NOT-FOUND]])
335 dnl substitute them in all the files listed in AC_OUTPUT
338 AC_DEFUN([AC_IEEE], [
339 AC_MSG_CHECKING([if IEEE math works $1])
340 AC_CACHE_VAL([rd_cv_ieee_$2],
341 [AC_RUN_IFELSE([AC_LANG_SOURCE([[$3
342 #include "src/rrd_config_bottom.h"
345 double rrdnan,rrdinf,rrdc,rrdzero;
347 /* some math to see if we get a floating point exception */
348 rrdzero=sin(0.0); /* don't let the compiler optimize us away */
349 rrdnan=0.0/rrdzero; /* especially here */
350 rrdinf=1.0/rrdzero; /* and here. I want to know if it can do the magic */
351 /* at run time without sig fpe */
352 rrdc = rrdinf + rrdnan;
353 rrdc = rrdinf / rrdnan;
354 if (! isnan(rrdnan)) {printf ("not isnan(NaN) ... "); return 1;}
355 if (rrdnan == rrdnan) {printf ("nan == nan ... "); return 1;}
356 if (! isinf(rrdinf)) {printf ("not isinf(oo) ... "); return 1;}
357 if (! isinf(-rrdinf)) {printf ("not isinf(-oo) ... "); return 1;}
358 if (! rrdinf > 0) {printf ("not inf > 0 ... "); return 1;}
359 if (! -rrdinf < 0) {printf ("not -inf < 0 ... "); return 1;}
361 }]])],[rd_cv_ieee_$2=yes],[rd_cv_ieee_$2=no],[:])])
362 dnl these we run regardles is cached or not
363 if test x${rd_cv_ieee_$2} = "xyes"; then
373 AC_DEFUN([AC_FULL_IEEE],[
376 AC_IEEE([out of the box], works, , , ,
377 [CFLAGS="$_cflags -ieee"
378 AC_IEEE([with the -ieee switch], switch, , , ,
379 [CFLAGS="$_cflags -qfloat=nofold"
380 AC_IEEE([with the -qfloat=nofold switch], nofold, , , ,
381 [CFLAGS="$_cflags -w -qflttrap=enable:zerodivide"
382 AC_IEEE([with the -w -qflttrap=enable:zerodivide], flttrap, , , ,
383 [CFLAGS="$_cflags -mieee"
384 AC_IEEE([with the -mieee switch], mswitch, , , ,
385 [CFLAGS="$_cflags -q float=rndsngl"
386 AC_IEEE([with the -q float=rndsngl switch], qswitch, , , ,
387 [CFLAGS="$_cflags -OPT:IEEE_NaN_inf=ON"
388 AC_IEEE([with the -OPT:IEEE_NaN_inf=ON switch], ieeenaninfswitch, , , ,
389 [CFLAGS="$_cflags -OPT:IEEE_comparisons=ON"
390 AC_IEEE([with the -OPT:IEEE_comparisons=ON switch], ieeecmpswitch, , , ,
392 AC_IEEE([with fpsetmask(0)], mask,
393 [#include <floatingpoint.h>], [fpsetmask(0)],
394 [AC_DEFINE(MUST_DISABLE_FPMASK)
395 PERLFLAGS="CCFLAGS=-DMUST_DISABLE_FPMASK"],
396 [AC_IEEE([with signal(SIGFPE,SIG_IGN)], sigfpe,
397 [#include <signal.h>], [signal(SIGFPE,SIG_IGN)],
398 [AC_DEFINE(MUST_DISABLE_SIGFPE)
399 PERLFLAGS="CCFLAGS=-DMUST_DISABLE_SIGFPE"],
401 Your Compiler does not do propper IEEE math ... Please find out how to
402 make IEEE math work with your compiler and let me know (tobi@oetiker.ch).
403 Check config.log to see what went wrong ...
404 ]))])])])])])])])])])
411 dnl a macro to check for ability to create python extensions
412 dnl AM_CHECK_PYTHON_HEADERS([ACTION-IF-POSSIBLE], [ACTION-IF-NOT-POSSIBLE])
413 dnl function also defines PYTHON_INCLUDES
414 AC_DEFUN([AM_CHECK_PYTHON_HEADERS],
415 [AC_REQUIRE([AM_PATH_PYTHON])
416 AC_MSG_CHECKING(for headers required to compile python extensions)
417 dnl deduce PYTHON_INCLUDES
418 py_prefix=`$PYTHON -c "import sys; print sys.prefix"`
419 py_exec_prefix=`$PYTHON -c "import sys; print sys.exec_prefix"`
420 PYTHON_INCLUDES="-I${py_prefix}/include/python${PYTHON_VERSION}"
421 if test "$py_prefix" != "$py_exec_prefix"; then
422 PYTHON_INCLUDES="$PYTHON_INCLUDES -I${py_exec_prefix}/include/python${PYTHON_VERSION}"
424 AC_SUBST(PYTHON_INCLUDES)
425 dnl check if the headers exist:
426 save_CPPFLAGS="$CPPFLAGS"
427 CPPFLAGS="$CPPFLAGS $PYTHON_INCLUDES"
428 AC_TRY_CPP([#include <Python.h>],dnl
429 [AC_MSG_RESULT(found)
431 [AC_MSG_RESULT(not found)
433 CPPFLAGS="$save_CPPFLAGS"
436 dnl a macro to add some color to the build process.
437 dnl CONFIGURE_PART(MESSAGE)
439 AC_DEFUN([CONFIGURE_PART],[
441 # for the most important terminal types we directly know the sequences
442 xterm|xterm*|vt220|vt220*)
443 T_MD=`awk 'BEGIN { printf("%c%c%c%c", 27, 91, 49, 109); }' </dev/null 2>/dev/null`
444 T_ME=`awk 'BEGIN { printf("%c%c%c", 27, 91, 109); }' </dev/null 2>/dev/null`
447 T_MD=`awk 'BEGIN { printf("%c%c%c%c%c%c", 27, 91, 49, 109, 0, 0); }' </dev/null 2>/dev/null`
448 T_ME=`awk 'BEGIN { printf("%c%c%c%c%c", 27, 91, 109, 0, 0); }' </dev/null 2>/dev/null`
456 AC_MSG_RESULT([${T_MD}$1${T_ME}])
461 AC_DEFUN([CHECK_FOR_WORKING_MS_ASYNC], [
462 AC_MSG_CHECKING([if msync with MS_ASYNC updates the files mtime])
463 AC_CACHE_VAL([rd_cv_ms_async],
464 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
466 #include <sys/types.h>
467 #include <sys/stat.h>
470 #include <sys/mman.h>
474 void timeout (int i) { exit (1); }
480 char temp[] = "mmaptestXXXXXX";
481 struct utimbuf newtime;
488 write(fd,"12345\n", 6);
490 create_ts = stbuf.st_mtime;
493 utime(temp,&newtime);
494 addr = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
495 if (addr == MAP_FAILED) {
500 res = msync(addr, 4, MS_ASYNC);
510 /* there were reports of sync hanging
511 so we better set an alarm */
512 signal(SIGALRM,&timeout);
514 /* The ASYNC means that we schedule the msync and return immediately.
515 Since we want to see if the modification time is updated upon
516 msync(), we have to make sure that our asynchronous request
517 completes before we stat below. In a real application, the
518 request would be completed at a random time in the future
519 but for this test we do not want to wait an arbitrary amount of
520 time, so force a commit now. */
523 if (create_ts > stbuf.st_mtime){
532 ]])],[rd_cv_ms_async=ok],[rd_cv_ms_async=broken],[:])])
535 if test "${rd_cv_ms_async}" = "ok"; then
538 AC_DEFINE_UNQUOTED(HAVE_BROKEN_MS_ASYNC, 1 , [set to 1 if msync with MS_ASYNC fails to update mtime])
540 AC_MSG_WARN([With mmap access, your platform fails to update the files])
541 AC_MSG_WARN([mtime. RRDtool will work around this problem by calling utime on each])
542 AC_MSG_WARN([file it opens for rw access.])
548 dnl idea taken from the autoconf mailing list, posted by
549 dnl Timur I. Bakeyev timur@gnu.org,
550 dnl http://mail.gnu.org/pipermail/autoconf/1999-October/008311.html
551 dnl partly rewritten by Peter Stamfest <peter@stamfest.at>
553 dnl This determines, if struct tm containes tm_gmtoff field
554 dnl or we should use extern long int timezone.
556 dnl Add the following to your acconfig.h:
558 dnl /* Define if your struct tm has tm_gmtoff. */
559 dnl #undef HAVE_TM_GMTOFF
562 dnl /* Define if you don't have tm_gmtoff but do have the external timezone. */
563 dnl #undef HAVE_TIMEZONE
565 AC_DEFUN([GC_TIMEZONE], [
566 AC_REQUIRE([AC_STRUCT_TM])
567 AC_CACHE_CHECK([tm_gmtoff in struct tm], gq_cv_have_tm_gmtoff,
568 gq_cv_have_tm_gmtoff=no
569 AC_TRY_COMPILE([#include <time.h>
570 #include <$ac_cv_struct_tm>
576 gq_cv_have_tm_gmtoff=yes
580 AC_CACHE_CHECK([__tm_gmtoff in struct tm], gq_cv_have___tm_gmtoff,
581 gq_cv_have___tm_gmtoff=no
582 AC_TRY_COMPILE([#include <time.h>
583 #include <$ac_cv_struct_tm>
589 gq_cv_have___tm_gmtoff=yes
593 if test "$gq_cv_have_tm_gmtoff" = yes ; then
594 AC_DEFINE(HAVE_TM_GMTOFF,1,[does tm have a tm_gmtoff member])
595 AC_DEFINE(TM_GMTOFF, tm_gmtoff,[the real name of tm_gmtoff])
596 elif test "$gq_cv_have___tm_gmtoff" = yes ; then
597 AC_DEFINE(HAVE_TM_GMTOFF)
598 AC_DEFINE(TM_GMTOFF, __tm_gmtoff)
600 AC_CACHE_CHECK(for timezone, ac_cv_var_timezone,
603 extern long int timezone;
605 [long int l = timezone;],
606 ac_cv_var_timezone=yes,
607 ac_cv_var_timezone=no)])
608 if test $ac_cv_var_timezone = yes; then
609 AC_DEFINE(HAVE_TIMEZONE,1,[is there an external timezone variable instead ?])