dnl Helper Functions for the RRDtool configure.ac script dnl dnl this file gets included into aclocal.m4 when runnning aclocal dnl dnl dnl dnl Check for the presence of a particular library and its header files dnl if this check fails set the environment variable EX_CHECK_ALL_ERR to YES dnl and prints out a helful message dnl dnl dnl EX_CHECK_ALL(library, function, header, pkgconf name, tested-version, homepage, cppflags) dnl $1 $2 $3 $4 $5 $6 $7 dnl dnl AC_DEFUN([EX_CHECK_ALL], [ AC_LANG_PUSH(C) EX_CHECK_STATE=NO ex_check_save_LIBS=${LIBS} ex_check_save_CPPFLAGS=${CPPFLAGS} ex_check_save_LDFLAGS=${LDFLAGS} if test "x$7" != "x"; then CPPFLAGS="$CPPFLAGS -I$7" fi dnl try compiling naked first AC_CHECK_LIB($1,$2, [ AC_CHECK_HEADER($3,[LIBS="-l$1 ${LIBS}";EX_CHECK_STATE=YES],[])],[]) if test $EX_CHECK_STATE = NO; then dnl now asking pkg-config for help AC_CHECK_PROGS(PKGCONFIG,[pkg-config],no) if test "$PKGCONFIG" != "no"; then if $PKGCONFIG --exists $4; then CPPFLAGS=${CPPFLAGS}" "`$PKGCONFIG --cflags $4` LDFLAGS=${LDFLAGS}" "`$PKGCONFIG --libs-only-L $4` LDFLAGS=${LDFLAGS}" "`$PKGCONFIG --libs-only-other $4` LIBS=${LIBS}" "`$PKGCONFIG --libs-only-l $4` dnl remove the cached value and test again unset ac_cv_lib_`echo $1 | sed ['s/[^_a-zA-Z0-9]/_/g;s/^[0-9]/_/']`_$2 AC_CHECK_LIB($1,$2,[ unset ac_cv_header_`echo $3 | sed ['s/[^_a-zA-Z0-9]/_/g;s/^[0-9]/_/']` AC_CHECK_HEADER($3,[EX_CHECK_STATE=YES],[]) ],[]) else AC_MSG_WARN([ ---------------------------------------------------------------------------- * I found a copy of pkgconfig, but there is no $4.pc file around. You may want to set the PKG_CONFIG_PATH variable to point to its location. ---------------------------------------------------------------------------- ]) fi fi fi if test ${EX_CHECK_STATE} = NO; then AC_MSG_WARN([ ---------------------------------------------------------------------------- * I could not find a working copy of $4. Check config.log for hints on why this is the case. Maybe you need to set LDFLAGS and CPPFLAGS appropriately so that compiler and the linker can find lib$1 and its header files. If you have not installed $4, you can get it either from its original home on $6 You can find also find an archive copy on http://oss.oetiker.ch/rrdtool/pub/libs The last tested version of $4 is $5. LIBS=$LIBS LDFLAGS=$LDFLAGS CPPFLAGS=$CPPFLAGS ---------------------------------------------------------------------------- ]) EX_CHECK_ALL_ERR=YES LIBS="${ex_check_save_LIBS}" CPPFLAGS="${ex_check_save_CPPFLAGS}" LDFLAGS="${ex_check_save_LDFLAGS}" fi AC_LANG_POP(C) ] ) dnl dnl Ptherad check from http://autoconf-archive.cryp.to/acx_pthread.m4 dnl dnl @synopsis ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) dnl dnl This macro figures out how to build C programs using POSIX threads. dnl It sets the PTHREAD_LIBS output variable to the threads library and dnl linker flags, and the PTHREAD_CFLAGS output variable to any special dnl C compiler flags that are needed. (The user can also force certain dnl compiler flags/libs to be tested by setting these environment dnl variables.) dnl dnl Also sets PTHREAD_CC to any special C compiler that is needed for dnl multi-threaded programs (defaults to the value of CC otherwise). dnl (This is necessary on AIX to use the special cc_r compiler alias.) dnl dnl NOTE: You are assumed to not only compile your program with these dnl flags, but also link it with them as well. e.g. you should link dnl with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS dnl $LIBS dnl dnl If you are only building threads programs, you may wish to use dnl these variables in your default LIBS, CFLAGS, and CC: dnl dnl LIBS="$PTHREAD_LIBS $LIBS" dnl CFLAGS="$CFLAGS $PTHREAD_CFLAGS" dnl CC="$PTHREAD_CC" dnl dnl In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute dnl constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to dnl that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX). dnl dnl ACTION-IF-FOUND is a list of shell commands to run if a threads dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the dnl default action will define HAVE_PTHREAD. dnl dnl Please let the authors know if this macro fails on any platform, or dnl if you have any other suggestions or comments. This macro was based dnl on work by SGJ on autoconf scripts for FFTW (www.fftw.org) (with dnl help from M. Frigo), as well as ac_pthread and hb_pthread macros dnl posted by Alejandro Forero Cuervo to the autoconf macro repository. dnl We are also grateful for the helpful feedback of numerous users. dnl dnl @category InstalledPackages dnl @author Steven G. Johnson dnl @version 2005-01-14 dnl @license GPLWithACException AC_DEFUN([ACX_PTHREAD], [ AC_REQUIRE([AC_CANONICAL_HOST]) AC_LANG_PUSH(C) acx_pthread_ok=no # We used to check for pthread.h first, but this fails if pthread.h # requires special compiler flags (e.g. on True64 or Sequent). # It gets checked for in the link test anyway. # First of all, check if the user has set any of the PTHREAD_LIBS, # etcetera environment variables, and if threads linking works using # them: if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $PTHREAD_CFLAGS" save_LIBS="$LIBS" LIBS="$PTHREAD_LIBS $LIBS" AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS]) AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes) AC_MSG_RESULT($acx_pthread_ok) if test x"$acx_pthread_ok" = xno; then PTHREAD_LIBS="" PTHREAD_CFLAGS="" fi LIBS="$save_LIBS" CFLAGS="$save_CFLAGS" fi # We must check for the threads library under a number of different # names; the ordering is very important because some systems # (e.g. DEC) have both -lpthread and -lpthreads, where one of the # libraries is broken (non-POSIX). # Create a list of thread flags to try. Items starting with a "-" are # C compiler flags, and other items are library names, except for "none" # which indicates that we try without any flags at all, and "pthread-config" # which is a program returning the flags for the Pth emulation library. acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config" # The ordering *is* (sometimes) important. Some notes on the # individual items follow: # pthreads: AIX (must check this before -lpthread) # none: in case threads are in libc; should be tried before -Kthread and # other compiler flags to prevent continual compiler warnings # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads) # -pthreads: Solaris/gcc # -mthreads: Mingw32/gcc, Lynx/gcc # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it # doesn't hurt to check since this sometimes defines pthreads too; # also defines -D_REENTRANT) # pthread: Linux, etcetera # --thread-safe: KAI C++ # pthread-config: use pthread-config program (for GNU Pth library) case "${host_cpu}-${host_os}" in *solaris*) # On Solaris (at least, for some versions), libc contains stubbed # (non-functional) versions of the pthreads routines, so link-based # tests will erroneously succeed. (We need to link with -pthread or # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather # a function called by this macro, so we could check for that, but # who knows whether they'll stub that too in a future libc.) So, # we'll just look for -pthreads and -lpthread first: acx_pthread_flags="-pthread -pthreads pthread -mt $acx_pthread_flags" ;; esac if test x"$acx_pthread_ok" = xno; then for flag in $acx_pthread_flags; do case $flag in none) AC_MSG_CHECKING([whether pthreads work without any flags]) ;; -*) AC_MSG_CHECKING([whether pthreads work with $flag]) PTHREAD_CFLAGS="$flag" ;; pthread-config) AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no) if test x"$acx_pthread_config" = xno; then continue; fi PTHREAD_CFLAGS="`pthread-config --cflags`" PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" ;; *) AC_MSG_CHECKING([for the pthreads library -l$flag]) PTHREAD_LIBS="-l$flag" ;; esac save_LIBS="$LIBS" save_CFLAGS="$CFLAGS" LIBS="$PTHREAD_LIBS $LIBS" CFLAGS="$CFLAGS $PTHREAD_CFLAGS" # Check for various functions. We must include pthread.h, # since some functions may be macros. (On the Sequent, we # need a special flag -Kthread to make this header compile.) # We check for pthread_join because it is in -lpthread on IRIX # while pthread_create is in libc. We check for pthread_attr_init # due to DEC craziness with -lpthreads. We check for # pthread_cleanup_push because it is one of the few pthread # functions on Solaris that doesn't have a non-functional libc stub. # We try pthread_create on general principles. AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include ]], [[pthread_t th; pthread_join(th, 0); pthread_attr_init(0); pthread_cleanup_push(0, 0); pthread_create(0,0,0,0); pthread_cleanup_pop(0); ]])],[acx_pthread_ok=yes],[]) LIBS="$save_LIBS" CFLAGS="$save_CFLAGS" AC_MSG_RESULT($acx_pthread_ok) if test "x$acx_pthread_ok" = xyes; then break; fi PTHREAD_LIBS="" PTHREAD_CFLAGS="" done fi # Various other checks: if test "x$acx_pthread_ok" = xyes; then save_LIBS="$LIBS" LIBS="$PTHREAD_LIBS $LIBS" save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $PTHREAD_CFLAGS" # Detect AIX lossage: JOINABLE attribute is called UNDETACHED. AC_MSG_CHECKING([for joinable pthread attribute]) attr_name=unknown for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include ]], [[int attr=$attr;]])],[attr_name=$attr; break],[]) done AC_MSG_RESULT($attr_name) if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name, [Define to necessary symbol if this constant uses a non-standard name on your system.]) fi AC_MSG_CHECKING([if more special flags are required for pthreads]) x_rflag=no case "${host_cpu}-${host_os}" in *-aix* | *-freebsd* | *-darwin*) x_rflag="-D_THREAD_SAFE";; *solaris* | *-osf* | *-hpux*) x_rflag="-D_REENTRANT";; *-linux*) if test x"$PTHREAD_CFLAGS" = "x-pthread"; then # For Linux/gcc "-pthread" implies "-lpthread". We need, however, to make this explicit # in PTHREAD_LIBS such that a shared library to be built properly depends on libpthread. PTHREAD_LIBS="-lpthread $PTHREAD_LIBS" fi;; esac AC_MSG_RESULT(${x_rflag}) if test "x$x_rflag" != xno; then PTHREAD_CFLAGS="$x_rflag $PTHREAD_CFLAGS" fi LIBS="$save_LIBS" CFLAGS="$save_CFLAGS" # More AIX lossage: must compile with cc_r AC_CHECK_PROG(PTHREAD_CC, cc_r, cc_r, ${CC}) else PTHREAD_CC="$CC" fi AC_SUBST(PTHREAD_LIBS) AC_SUBST(PTHREAD_CFLAGS) AC_SUBST(PTHREAD_CC) # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: if test x"$acx_pthread_ok" = xyes; then ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1]) : else acx_pthread_ok=no $2 fi AC_LANG_POP(C) ])dnl ACX_PTHREAD dnl dnl determine how to get IEEE math working dnl AC_IEEE(MESSAGE, set rd_cv_ieee_[var] variable, INCLUDES, dnl FUNCTION-BODY, [ACTION-IF-FOUND [,ACTION-IF-NOT-FOUND]]) dnl dnl substitute them in all the files listed in AC_OUTPUT AC_SUBST(PERLFLAGS) AC_DEFUN([AC_IEEE], [ AC_MSG_CHECKING([if IEEE math works $1]) AC_CACHE_VAL([rd_cv_ieee_$2], [AC_RUN_IFELSE([AC_LANG_SOURCE([[$3 #if HAVE_MATH_H # include #endif #if HAVE_FLOAT_H # include #endif #if HAVE_IEEEFP_H # include #endif #if HAVE_FP_CLASS_H # include #endif /* Solaris */ #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASS)) # define HAVE_ISINF 1 # define isinf(a) (fpclass(a) == FP_NINF || fpclass(a) == FP_PINF) #endif /* solaris 10 it defines isnan such that only forte can compile it ... bad bad */ #if (defined(HAVE_ISNAN) && defined(isnan) && defined(HAVE_FPCLASS)) # undef isnan # define isnan(a) (fpclass(a) == FP_SNAN || fpclass(a) == FP_QNAN) #endif /* Digital UNIX */ #if (! defined(HAVE_ISINF) && defined(HAVE_FP_CLASS) && defined(HAVE_FP_CLASS_H)) # define HAVE_ISINF 1 # define isinf(a) (fp_class(a) == FP_NEG_INF || fp_class(a) == FP_POS_INF) #endif /* AIX */ #if (! defined(HAVE_ISINF) && defined(HAVE_CLASS)) # define HAVE_ISINF 1 # define isinf(a) (class(a) == FP_MINUS_INF || class(a) == FP_PLUS_INF) #endif #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASSIFY) && defined(FP_PLUS_INF) && defined(FP_MINUS_INF)) # define HAVE_ISINF 1 # define isinf(a) (fpclassify(a) == FP_MINUS_INF || fpclassify(a) == FP_PLUS_INF) #endif #if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASSIFY) && defined(FP_INFINITE)) # define HAVE_ISINF 1 # define isinf(a) (fpclassify(a) == FP_INFINITE) #endif #include int main(void){ double rrdnan,rrdinf,rrdc,rrdzero; $4; /* some math to see if we get a floating point exception */ rrdzero=sin(0.0); /* don't let the compiler optimize us away */ rrdnan=0.0/rrdzero; /* especially here */ rrdinf=1.0/rrdzero; /* and here. I want to know if it can do the magic */ /* at run time without sig fpe */ rrdc = rrdinf + rrdnan; rrdc = rrdinf / rrdnan; if (! isnan(rrdnan)) {printf ("not isnan(NaN) ... "); return 1;} if (rrdnan == rrdnan) {printf ("nan == nan ... "); return 1;} if (! isinf(rrdinf)) {printf ("not isinf(oo) ... "); return 1;} if (! isinf(-rrdinf)) {printf ("not isinf(-oo) ... "); return 1;} if (! rrdinf > 0) {printf ("not inf > 0 ... "); return 1;} if (! -rrdinf < 0) {printf ("not -inf < 0 ... "); return 1;} return 0; }]])],[rd_cv_ieee_$2=yes],[rd_cv_ieee_$2=no],[:])]) dnl these we run regardles is cached or not if test x${rd_cv_ieee_$2} = "xyes"; then AC_MSG_RESULT(yes) $5 else AC_MSG_RESULT(no) $6 fi ]) AC_DEFUN([AC_FULL_IEEE],[ AC_LANG_PUSH(C) _cflags=${CFLAGS} AC_IEEE([out of the box], works, , , , [CFLAGS="$_cflags -ieee" AC_IEEE([with the -ieee switch], switch, , , , [CFLAGS="$_cflags -qfloat=nofold" AC_IEEE([with the -qfloat=nofold switch], nofold, , , , [CFLAGS="$_cflags -w -qflttrap=enable:zerodivide" AC_IEEE([with the -w -qflttrap=enable:zerodivide], flttrap, , , , [CFLAGS="$_cflags -mieee" AC_IEEE([with the -mieee switch], mswitch, , , , [CFLAGS="$_cflags -q float=rndsngl" AC_IEEE([with the -q float=rndsngl switch], qswitch, , , , [CFLAGS="$_cflags -OPT:IEEE_NaN_inf=ON" AC_IEEE([with the -OPT:IEEE_NaN_inf=ON switch], ieeenaninfswitch, , , , [CFLAGS="$_cflags -OPT:IEEE_comparisons=ON" AC_IEEE([with the -OPT:IEEE_comparisons=ON switch], ieeecmpswitch, , , , [CFLAGS=$_cflags AC_IEEE([with fpsetmask(0)], mask, [#include ], [fpsetmask(0)], [AC_DEFINE(MUST_DISABLE_FPMASK) PERLFLAGS="CCFLAGS=-DMUST_DISABLE_FPMASK"], [AC_IEEE([with signal(SIGFPE,SIG_IGN)], sigfpe, [#include ], [signal(SIGFPE,SIG_IGN)], [AC_DEFINE(MUST_DISABLE_SIGFPE) PERLFLAGS="CCFLAGS=-DMUST_DISABLE_SIGFPE"], AC_MSG_ERROR([ Your Compiler does not do propper IEEE math ... Please find out how to make IEEE math work with your compiler and let me know (tobi@oetiker.ch). Check config.log to see what went wrong ... ]))])])])])])])])])]) AC_LANG_POP(C) ]) dnl a macro to check for ability to create python extensions dnl AM_CHECK_PYTHON_HEADERS([ACTION-IF-POSSIBLE], [ACTION-IF-NOT-POSSIBLE]) dnl function also defines PYTHON_INCLUDES AC_DEFUN([AM_CHECK_PYTHON_HEADERS], [AC_REQUIRE([AM_PATH_PYTHON]) AC_MSG_CHECKING(for headers required to compile python extensions) dnl deduce PYTHON_INCLUDES py_prefix=`$PYTHON -c "import sys; print sys.prefix"` py_exec_prefix=`$PYTHON -c "import sys; print sys.exec_prefix"` PYTHON_INCLUDES="-I${py_prefix}/include/python${PYTHON_VERSION}" if test "$py_prefix" != "$py_exec_prefix"; then PYTHON_INCLUDES="$PYTHON_INCLUDES -I${py_exec_prefix}/include/python${PYTHON_VERSION}" fi AC_SUBST(PYTHON_INCLUDES) dnl check if the headers exist: save_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS $PYTHON_INCLUDES" AC_TRY_CPP([#include ],dnl [AC_MSG_RESULT(found) $1],dnl [AC_MSG_RESULT(not found) $2]) CPPFLAGS="$save_CPPFLAGS" ]) dnl a macro to add some color to the build process. dnl CONFIGURE_PART(MESSAGE) AC_DEFUN([CONFIGURE_PART],[ case $TERM in # for the most important terminal types we directly know the sequences xterm|xterm*|vt220|vt220*) T_MD=`awk 'BEGIN { printf("%c%c%c%c", 27, 91, 49, 109); }' /dev/null` T_ME=`awk 'BEGIN { printf("%c%c%c", 27, 91, 109); }' /dev/null` ;; vt100|vt100*|cygwin) T_MD=`awk 'BEGIN { printf("%c%c%c%c%c%c", 27, 91, 49, 109, 0, 0); }' /dev/null` T_ME=`awk 'BEGIN { printf("%c%c%c%c%c", 27, 91, 109, 0, 0); }' /dev/null` ;; *) T_MD='' T_ME='' ;; esac AC_MSG_RESULT() AC_MSG_RESULT([${T_MD}$1${T_ME}]) ]) dnl check AC_DEFUN([CHECK_FOR_WORKING_MS_ASYNC], [ AC_MSG_CHECKING([if msync with MS_ASYNC updates the files mtime]) AC_CACHE_VAL([rd_cv_ms_async], [AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include #include #include #include #include #include #include int main(void){ int fd; struct stat stbuf; char *addr; int res; char temp[] = "mmaptestXXXXXX"; struct utimbuf newtime; time_t create_ts; fd = mkstemp(temp); if (fd == -1){ perror(temp); return 1; } write(fd,"12345\n", 6); stat(temp, &stbuf); create_ts = stbuf.st_mtime; newtime.actime = 0; newtime.modtime = 0; utime(temp,&newtime); addr = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); if (addr == MAP_FAILED) { perror("mmap"); goto bad_exit; } addr[0]='x'; res = msync(addr, 4, MS_ASYNC); if (res == -1) { perror("msync"); goto bad_exit; } res = close(fd); if (res == -1) { perror("close"); goto bad_exit; } /* The ASYNC means that we schedule the msync and return immediately. Since we want to see if the modification time is updated upon msync(), we have to make sure that our asynchronous request completes before we stat below. In a real application, the request would be completed at a random time in the future but for this test we do not want to wait an arbitrary amount of time, so force a commit now. */ sync(); stat(temp, &stbuf); if (create_ts > stbuf.st_mtime){ goto bad_exit; } unlink(temp); return 0; bad_exit: unlink(temp); return 1; } ]])],[rd_cv_ms_async=ok],[rd_cv_ms_async=broken],[:])]) if test "${rd_cv_ms_async}" = "ok"; then AC_MSG_RESULT(yes) else AC_DEFINE_UNQUOTED(HAVE_BROKEN_MS_ASYNC, 1 , [set to 1 if msync with MS_ASYNC fails to update mtime]) AC_MSG_RESULT(no) AC_MSG_WARN([With mmap access, your platform fails to update the files]) AC_MSG_WARN([mtime. RRDtool will work around this problem by calling utime on each]) AC_MSG_WARN([file it opens for rw access.]) sleep 2 fi ])