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=${CPPFLAGS}
22 ex_check_save_LDFLAGS=${LDPFLAGS}
23 if test "x$7" != "x"; then
24 CPPFLAGS="-I$7 $CPPFLAGS"
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
40 AC_CHECK_LIB($1,$2,[ AC_CHECK_HEADER($3,[EX_CHECK_STATE=YES],[])],[])
43 ----------------------------------------------------------------------------
44 * I found a copy of pkgconfig, but there is no $4.pc file around.
45 You may want to set the PKG_CONFIG_PATH variable to point to its
47 ----------------------------------------------------------------------------
53 if test ${EX_CHECK_STATE} = NO; then
55 ----------------------------------------------------------------------------
56 * I could not find a working copy of $4. Check config.log for hints on why
57 this is the case. Maybe you need to set LDFLAGS and CPPFLAGS appropriately
58 so that compiler and the linker can find lib$1 and its header files. If
59 you have not installed $4, you can get it either from its original home on
63 You can find also find an archive copy on
65 http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/pub/libs
67 The last tested version of $4 is $5.
73 ----------------------------------------------------------------------------
76 LIBS="${ex_check_save_LIBS}"
77 CPPFLAGS="${ex_check_save_CPPFLAGS}"
78 LDFLAGS="${ex_check_save_LDFLAGS}"
85 dnl Ptherad check from http://autoconf-archive.cryp.to/acx_pthread.m4
87 dnl @synopsis ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
89 dnl This macro figures out how to build C programs using POSIX threads.
90 dnl It sets the PTHREAD_LIBS output variable to the threads library and
91 dnl linker flags, and the PTHREAD_CFLAGS output variable to any special
92 dnl C compiler flags that are needed. (The user can also force certain
93 dnl compiler flags/libs to be tested by setting these environment
96 dnl Also sets PTHREAD_CC to any special C compiler that is needed for
97 dnl multi-threaded programs (defaults to the value of CC otherwise).
98 dnl (This is necessary on AIX to use the special cc_r compiler alias.)
100 dnl NOTE: You are assumed to not only compile your program with these
101 dnl flags, but also link it with them as well. e.g. you should link
102 dnl with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS
105 dnl If you are only building threads programs, you may wish to use
106 dnl these variables in your default LIBS, CFLAGS, and CC:
108 dnl LIBS="$PTHREAD_LIBS $LIBS"
109 dnl CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
112 dnl In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute
113 dnl constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to
114 dnl that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
116 dnl ACTION-IF-FOUND is a list of shell commands to run if a threads
117 dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to
118 dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the
119 dnl default action will define HAVE_PTHREAD.
121 dnl Please let the authors know if this macro fails on any platform, or
122 dnl if you have any other suggestions or comments. This macro was based
123 dnl on work by SGJ on autoconf scripts for FFTW (www.fftw.org) (with
124 dnl help from M. Frigo), as well as ac_pthread and hb_pthread macros
125 dnl posted by Alejandro Forero Cuervo to the autoconf macro repository.
126 dnl We are also grateful for the helpful feedback of numerous users.
128 dnl @category InstalledPackages
129 dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
130 dnl @version 2005-01-14
131 dnl @license GPLWithACException
133 AC_DEFUN([ACX_PTHREAD], [
134 AC_REQUIRE([AC_CANONICAL_HOST])
138 # We used to check for pthread.h first, but this fails if pthread.h
139 # requires special compiler flags (e.g. on True64 or Sequent).
140 # It gets checked for in the link test anyway.
142 # First of all, check if the user has set any of the PTHREAD_LIBS,
143 # etcetera environment variables, and if threads linking works using
145 if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
146 save_CFLAGS="$CFLAGS"
147 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
149 LIBS="$PTHREAD_LIBS $LIBS"
150 AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
151 AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
152 AC_MSG_RESULT($acx_pthread_ok)
153 if test x"$acx_pthread_ok" = xno; then
158 CFLAGS="$save_CFLAGS"
161 # We must check for the threads library under a number of different
162 # names; the ordering is very important because some systems
163 # (e.g. DEC) have both -lpthread and -lpthreads, where one of the
164 # libraries is broken (non-POSIX).
166 # Create a list of thread flags to try. Items starting with a "-" are
167 # C compiler flags, and other items are library names, except for "none"
168 # which indicates that we try without any flags at all, and "pthread-config"
169 # which is a program returning the flags for the Pth emulation library.
171 acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
173 # The ordering *is* (sometimes) important. Some notes on the
174 # individual items follow:
176 # pthreads: AIX (must check this before -lpthread)
177 # none: in case threads are in libc; should be tried before -Kthread and
178 # other compiler flags to prevent continual compiler warnings
179 # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
180 # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
181 # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
182 # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
183 # -pthreads: Solaris/gcc
184 # -mthreads: Mingw32/gcc, Lynx/gcc
185 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
186 # doesn't hurt to check since this sometimes defines pthreads too;
187 # also defines -D_REENTRANT)
188 # pthread: Linux, etcetera
189 # --thread-safe: KAI C++
190 # pthread-config: use pthread-config program (for GNU Pth library)
192 case "${host_cpu}-${host_os}" in
195 # On Solaris (at least, for some versions), libc contains stubbed
196 # (non-functional) versions of the pthreads routines, so link-based
197 # tests will erroneously succeed. (We need to link with -pthread or
198 # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
199 # a function called by this macro, so we could check for that, but
200 # who knows whether they'll stub that too in a future libc.) So,
201 # we'll just look for -pthreads and -lpthread first:
203 acx_pthread_flags="-pthread -pthreads pthread -mt $acx_pthread_flags"
207 if test x"$acx_pthread_ok" = xno; then
208 for flag in $acx_pthread_flags; do
212 AC_MSG_CHECKING([whether pthreads work without any flags])
216 AC_MSG_CHECKING([whether pthreads work with $flag])
217 PTHREAD_CFLAGS="$flag"
221 AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)
222 if test x"$acx_pthread_config" = xno; then continue; fi
223 PTHREAD_CFLAGS="`pthread-config --cflags`"
224 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
228 AC_MSG_CHECKING([for the pthreads library -l$flag])
229 PTHREAD_LIBS="-l$flag"
234 save_CFLAGS="$CFLAGS"
235 LIBS="$PTHREAD_LIBS $LIBS"
236 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
238 # Check for various functions. We must include pthread.h,
239 # since some functions may be macros. (On the Sequent, we
240 # need a special flag -Kthread to make this header compile.)
241 # We check for pthread_join because it is in -lpthread on IRIX
242 # while pthread_create is in libc. We check for pthread_attr_init
243 # due to DEC craziness with -lpthreads. We check for
244 # pthread_cleanup_push because it is one of the few pthread
245 # functions on Solaris that doesn't have a non-functional libc stub.
246 # We try pthread_create on general principles.
247 AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], [[pthread_t th; pthread_join(th, 0);
248 pthread_attr_init(0); pthread_cleanup_push(0, 0);
249 pthread_create(0,0,0,0); pthread_cleanup_pop(0); ]])],[acx_pthread_ok=yes],[])
252 CFLAGS="$save_CFLAGS"
254 AC_MSG_RESULT($acx_pthread_ok)
255 if test "x$acx_pthread_ok" = xyes; then
264 # Various other checks:
265 if test "x$acx_pthread_ok" = xyes; then
267 LIBS="$PTHREAD_LIBS $LIBS"
268 save_CFLAGS="$CFLAGS"
269 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
271 # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
272 AC_MSG_CHECKING([for joinable pthread attribute])
274 for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
275 AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], [[int attr=$attr;]])],[attr_name=$attr; break],[])
277 AC_MSG_RESULT($attr_name)
278 if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
279 AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,
280 [Define to necessary symbol if this constant
281 uses a non-standard name on your system.])
284 AC_MSG_CHECKING([if more special flags are required for pthreads])
286 case "${host_cpu}-${host_os}" in
287 *-aix* | *-freebsd* | *-darwin*) x_rflag="-D_THREAD_SAFE";;
288 *solaris* | *-osf* | *-hpux*) x_rflag="-D_REENTRANT";;
290 AC_MSG_RESULT(${x_rflag})
291 if test "x$x_rflag" != xno; then
292 PTHREAD_CFLAGS="$x_rflag $PTHREAD_CFLAGS"
296 CFLAGS="$save_CFLAGS"
298 # More AIX lossage: must compile with cc_r
299 AC_CHECK_PROG(PTHREAD_CC, cc_r, cc_r, ${CC})
304 AC_SUBST(PTHREAD_LIBS)
305 AC_SUBST(PTHREAD_CFLAGS)
308 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
309 if test x"$acx_pthread_ok" = xyes; then
310 ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
321 dnl determine how to get IEEE math working
322 dnl AC_IEEE(MESSAGE, set rd_cv_ieee_[var] variable, INCLUDES,
323 dnl FUNCTION-BODY, [ACTION-IF-FOUND [,ACTION-IF-NOT-FOUND]])
326 dnl substitute them in all the files listed in AC_OUTPUT
329 AC_DEFUN([AC_IEEE], [
330 AC_MSG_CHECKING([if IEEE math works $1])
331 AC_CACHE_VAL([rd_cv_ieee_$2],
332 [AC_RUN_IFELSE([AC_LANG_SOURCE([[$3
347 # include <fp_class.h>
351 #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASS))
352 # define HAVE_ISINF 1
353 # define isinf(a) (fpclass(a) == FP_NINF || fpclass(a) == FP_PINF)
357 #if (! defined(HAVE_ISINF) && defined(HAVE_FP_CLASS) && defined(HAVE_FP_CLASS_H))
358 # define HAVE_ISINF 1
359 # define isinf(a) (fp_class(a) == FP_NEG_INF || fp_class(a) == FP_POS_INF)
363 #if (! defined(HAVE_ISINF) && defined(HAVE_CLASS))
364 # define HAVE_ISINF 1
365 # define isinf(a) (class(a) == FP_MINUS_INF || class(a) == FP_PLUS_INF)
368 #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASSIFY) && defined(FP_PLUS_INF) && defined(FP_MINUS_INF))
369 # define HAVE_ISINF 1
370 # define isinf(a) (fpclassify(a) == FP_MINUS_INF || fpclassify(a) == FP_PLUS_INF)
373 #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASSIFY) && defined(FP_INFINITE))
374 # define HAVE_ISINF 1
375 # define isinf(a) (fpclassify(a) == FP_INFINITE)
380 double nan,inf,c,zero;
382 /* some math to see if we get a floating point exception */
383 zero=sin(0.0); /* don't let the compiler optimize us away */
384 nan=0.0/zero; /* especially here */
385 inf=1.0/zero; /* and here. I want to know if it can do the magic */
386 /* at run time without sig fpe */
389 if (! isnan(nan)) {printf ("not isnan(NaN) ... "); return 1;}
390 if (nan == nan) {printf ("nan == nan ... "); return 1;}
391 if (! isinf(inf)) {printf ("not isinf(oo) ... "); return 1;}
392 if (! isinf(-inf)) {printf ("not isinf(-oo) ... "); return 1;}
393 if (! inf > 0) {printf ("not inf > 0 ... "); return 1;}
394 if (! -inf < 0) {printf ("not -inf < 0 ... "); return 1;}
396 }]])],[rd_cv_ieee_$2=yes],[rd_cv_ieee_$2=no],[:])])
397 dnl these we run regardles is cached or not
398 if test x${rd_cv_ieee_$2} = "xyes"; then
408 AC_DEFUN([AC_FULL_IEEE],[
411 AC_IEEE([out of the box], works, , , ,
412 [CFLAGS="$_cflags -ieee"
413 AC_IEEE([with the -ieee switch], switch, , , ,
414 [CFLAGS="$_cflags -qfloat=nofold"
415 AC_IEEE([with the -qfloat=nofold switch], nofold, , , ,
416 [CFLAGS="$_cflags -w -qflttrap=enable:zerodivide"
417 AC_IEEE([with the -w -qflttrap=enable:zerodivide], flttrap, , , ,
418 [CFLAGS="$_cflags -mieee"
419 AC_IEEE([with the -mieee switch], mswitch, , , ,
420 [CFLAGS="$_cflags -q float=rndsngl"
421 AC_IEEE([with the -q float=rndsngl switch], qswitch, , , ,
422 [CFLAGS="$_cflags -OPT:IEEE_NaN_inf=ON"
423 AC_IEEE([with the -OPT:IEEE_NaN_inf=ON switch], ieeenaninfswitch, , , ,
424 [CFLAGS="$_cflags -OPT:IEEE_comparisons=ON"
425 AC_IEEE([with the -OPT:IEEE_comparisons=ON switch], ieeecmpswitch, , , ,
427 AC_IEEE([with fpsetmask(0)], mask,
428 [#include <floatingpoint.h>], [fpsetmask(0)],
429 [AC_DEFINE(MUST_DISABLE_FPMASK)
430 PERLFLAGS="CCFLAGS=-DMUST_DISABLE_FPMASK"],
431 [AC_IEEE([with signal(SIGFPE,SIG_IGN)], sigfpe,
432 [#include <signal.h>], [signal(SIGFPE,SIG_IGN)],
433 [AC_DEFINE(MUST_DISABLE_SIGFPE)
434 PERLFLAGS="CCFLAGS=-DMUST_DISABLE_SIGFPE"],
436 Your Compiler does not do propper IEEE math ... Please find out how to
437 make IEEE math work with your compiler and let me know (oetiker@ee.ethz.ch).
438 Check config.log to see what went wrong ...
439 ]))])])])])])])])])])