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
356 # include <fp_class.h>
360 #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASS))
361 # define HAVE_ISINF 1
362 # define isinf(a) (fpclass(a) == FP_NINF || fpclass(a) == FP_PINF)
365 /* solaris 10 it defines isnan such that only forte can compile it ... bad bad */
366 #if (defined(HAVE_ISNAN) && defined(isnan) && defined(HAVE_FPCLASS) && defined(FP_SNAN) && defined(FP_QNAN))
368 # define isnan(a) (fpclass(a) == FP_SNAN || fpclass(a) == FP_QNAN)
372 #if (! defined(HAVE_ISINF) && defined(HAVE_FP_CLASS) && defined(HAVE_FP_CLASS_H) && defined(FP_NEG_INF) && defined( FP_POS_INF) )
373 # define HAVE_ISINF 1
374 # define isinf(a) (fp_class(a) == FP_NEG_INF || fp_class(a) == FP_POS_INF)
378 #if (! defined(HAVE_ISINF) && defined(HAVE_CLASS))
379 # define HAVE_ISINF 1
380 # define isinf(a) (class(a) == FP_MINUS_INF || class(a) == FP_PLUS_INF)
383 #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASSIFY) && defined(FP_PLUS_INF) && defined(FP_MINUS_INF))
384 # define HAVE_ISINF 1
385 # define isinf(a) (fpclassify(a) == FP_MINUS_INF || fpclassify(a) == FP_PLUS_INF)
388 #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASSIFY) && defined(FP_INFINITE))
389 # define HAVE_ISINF 1
390 # define isinf(a) (fpclassify(a) == FP_INFINITE)
399 double rrdnan,rrdinf,rrdc,rrdzero;
401 /* some math to see if we get a floating point exception */
402 rrdzero=sin(0.0); /* don't let the compiler optimize us away */
403 rrdnan=0.0/rrdzero; /* especially here */
404 rrdinf=1.0/rrdzero; /* and here. I want to know if it can do the magic */
405 /* at run time without sig fpe */
406 rrdc = rrdinf + rrdnan;
407 rrdc = rrdinf / rrdnan;
408 if (! isnan(rrdnan)) {printf ("not isnan(NaN) ... "); return 1;}
409 if (rrdnan == rrdnan) {printf ("nan == nan ... "); return 1;}
410 if (! isinf(rrdinf)) {printf ("not isinf(oo) ... "); return 1;}
411 if (! isinf(-rrdinf)) {printf ("not isinf(-oo) ... "); return 1;}
412 if (! rrdinf > 0) {printf ("not inf > 0 ... "); return 1;}
413 if (! -rrdinf < 0) {printf ("not -inf < 0 ... "); return 1;}
415 }]])],[rd_cv_ieee_$2=yes],[rd_cv_ieee_$2=no],[:])])
416 dnl these we run regardles is cached or not
417 if test x${rd_cv_ieee_$2} = "xyes"; then
427 AC_DEFUN([AC_FULL_IEEE],[
430 AC_IEEE([out of the box], works, , , ,
431 [CFLAGS="$_cflags -ieee"
432 AC_IEEE([with the -ieee switch], switch, , , ,
433 [CFLAGS="$_cflags -qfloat=nofold"
434 AC_IEEE([with the -qfloat=nofold switch], nofold, , , ,
435 [CFLAGS="$_cflags -w -qflttrap=enable:zerodivide"
436 AC_IEEE([with the -w -qflttrap=enable:zerodivide], flttrap, , , ,
437 [CFLAGS="$_cflags -mieee"
438 AC_IEEE([with the -mieee switch], mswitch, , , ,
439 [CFLAGS="$_cflags -q float=rndsngl"
440 AC_IEEE([with the -q float=rndsngl switch], qswitch, , , ,
441 [CFLAGS="$_cflags -OPT:IEEE_NaN_inf=ON"
442 AC_IEEE([with the -OPT:IEEE_NaN_inf=ON switch], ieeenaninfswitch, , , ,
443 [CFLAGS="$_cflags -OPT:IEEE_comparisons=ON"
444 AC_IEEE([with the -OPT:IEEE_comparisons=ON switch], ieeecmpswitch, , , ,
446 AC_IEEE([with fpsetmask(0)], mask,
447 [#include <floatingpoint.h>], [fpsetmask(0)],
448 [AC_DEFINE(MUST_DISABLE_FPMASK)
449 PERLFLAGS="CCFLAGS=-DMUST_DISABLE_FPMASK"],
450 [AC_IEEE([with signal(SIGFPE,SIG_IGN)], sigfpe,
451 [#include <signal.h>], [signal(SIGFPE,SIG_IGN)],
452 [AC_DEFINE(MUST_DISABLE_SIGFPE)
453 PERLFLAGS="CCFLAGS=-DMUST_DISABLE_SIGFPE"],
455 Your Compiler does not do propper IEEE math ... Please find out how to
456 make IEEE math work with your compiler and let me know (tobi@oetiker.ch).
457 Check config.log to see what went wrong ...
458 ]))])])])])])])])])])
465 dnl a macro to check for ability to create python extensions
466 dnl AM_CHECK_PYTHON_HEADERS([ACTION-IF-POSSIBLE], [ACTION-IF-NOT-POSSIBLE])
467 dnl function also defines PYTHON_INCLUDES
468 AC_DEFUN([AM_CHECK_PYTHON_HEADERS],
469 [AC_REQUIRE([AM_PATH_PYTHON])
470 AC_MSG_CHECKING(for headers required to compile python extensions)
471 dnl deduce PYTHON_INCLUDES
472 py_prefix=`$PYTHON -c "import sys; print sys.prefix"`
473 py_exec_prefix=`$PYTHON -c "import sys; print sys.exec_prefix"`
474 PYTHON_INCLUDES="-I${py_prefix}/include/python${PYTHON_VERSION}"
475 if test "$py_prefix" != "$py_exec_prefix"; then
476 PYTHON_INCLUDES="$PYTHON_INCLUDES -I${py_exec_prefix}/include/python${PYTHON_VERSION}"
478 AC_SUBST(PYTHON_INCLUDES)
479 dnl check if the headers exist:
480 save_CPPFLAGS="$CPPFLAGS"
481 CPPFLAGS="$CPPFLAGS $PYTHON_INCLUDES"
482 AC_TRY_CPP([#include <Python.h>],dnl
483 [AC_MSG_RESULT(found)
485 [AC_MSG_RESULT(not found)
487 CPPFLAGS="$save_CPPFLAGS"
490 dnl a macro to add some color to the build process.
491 dnl CONFIGURE_PART(MESSAGE)
493 AC_DEFUN([CONFIGURE_PART],[
495 # for the most important terminal types we directly know the sequences
496 xterm|xterm*|vt220|vt220*)
497 T_MD=`awk 'BEGIN { printf("%c%c%c%c", 27, 91, 49, 109); }' </dev/null 2>/dev/null`
498 T_ME=`awk 'BEGIN { printf("%c%c%c", 27, 91, 109); }' </dev/null 2>/dev/null`
501 T_MD=`awk 'BEGIN { printf("%c%c%c%c%c%c", 27, 91, 49, 109, 0, 0); }' </dev/null 2>/dev/null`
502 T_ME=`awk 'BEGIN { printf("%c%c%c%c%c", 27, 91, 109, 0, 0); }' </dev/null 2>/dev/null`
510 AC_MSG_RESULT([${T_MD}$1${T_ME}])
515 AC_DEFUN([CHECK_FOR_WORKING_MS_ASYNC], [
516 AC_MSG_CHECKING([if msync with MS_ASYNC updates the files mtime])
517 AC_CACHE_VAL([rd_cv_ms_async],
518 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
520 #include <sys/types.h>
521 #include <sys/stat.h>
524 #include <sys/mman.h>
528 void timeout (int i) { exit (1); }
534 char temp[] = "mmaptestXXXXXX";
535 struct utimbuf newtime;
542 write(fd,"12345\n", 6);
544 create_ts = stbuf.st_mtime;
547 utime(temp,&newtime);
548 addr = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
549 if (addr == MAP_FAILED) {
554 res = msync(addr, 4, MS_ASYNC);
564 /* there were reports of sync hanging
565 so we better set an alarm */
566 signal(SIGALRM,&timeout);
568 /* The ASYNC means that we schedule the msync and return immediately.
569 Since we want to see if the modification time is updated upon
570 msync(), we have to make sure that our asynchronous request
571 completes before we stat below. In a real application, the
572 request would be completed at a random time in the future
573 but for this test we do not want to wait an arbitrary amount of
574 time, so force a commit now. */
577 if (create_ts > stbuf.st_mtime){
586 ]])],[rd_cv_ms_async=ok],[rd_cv_ms_async=broken],[:])])
589 if test "${rd_cv_ms_async}" = "ok"; then
592 AC_DEFINE_UNQUOTED(HAVE_BROKEN_MS_ASYNC, 1 , [set to 1 if msync with MS_ASYNC fails to update mtime])
594 AC_MSG_WARN([With mmap access, your platform fails to update the files])
595 AC_MSG_WARN([mtime. RRDtool will work around this problem by calling utime on each])
596 AC_MSG_WARN([file it opens for rw access.])