+++ /dev/null
-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 <stevenj@alum.mit.edu>
-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 $PTHREAD_CFLAGS"
-
- # Check for various functions. We must include pthread.h,
- # since some functions may be macros. (On the Sequent, we
- # need a special flag -Kthread to make this header compile.)
- # We check for pthread_join because it is in -lpthread on IRIX
- # while pthread_create is in libc. We check for pthread_attr_init
- # due to DEC craziness with -lpthreads. We check for
- # pthread_cleanup_push because it is one of the few pthread
- # functions on Solaris that doesn't have a non-functional libc stub.
- # We try pthread_create on general principles.
- AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], [[pthread_t th; pthread_join(th, 0);
- pthread_attr_init(0); pthread_cleanup_push(0, 0);
- pthread_create(0,0,0,0); pthread_cleanup_pop(0); ]])],[acx_pthread_ok=yes],[])
-
- LIBS="$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 $PTHREAD_CFLAGS"
-
- # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
- AC_MSG_CHECKING([for joinable pthread attribute])
- attr_name=unknown
- for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
- AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], [[int attr=$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 <math.h>
-#endif
-
-#if HAVE_FLOAT_H
-# include <float.h>
-#endif
-
-#if HAVE_IEEEFP_H
-# include <ieeefp.h>
-#endif
-
-#if HAVE_FP_CLASS_H
-# include <fp_class.h>
-#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 <stdio.h>
-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 <floatingpoint.h>], [fpsetmask(0)],
- [AC_DEFINE(MUST_DISABLE_FPMASK)
- PERLFLAGS="CCFLAGS=-DMUST_DISABLE_FPMASK"],
- [AC_IEEE([with signal(SIGFPE,SIG_IGN)], sigfpe,
- [#include <signal.h>], [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 <Python.h>],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 $TERM in
- # for the most important terminal types we directly know the sequences
- xterm|xterm*|vt220|vt220*)
- T_MD=`awk 'BEGIN { printf("%c%c%c%c", 27, 91, 49, 109); }' </dev/null 2>/dev/null`
- T_ME=`awk 'BEGIN { printf("%c%c%c", 27, 91, 109); }' </dev/null 2>/dev/null`
- ;;
- vt100|vt100*|cygwin)
- T_MD=`awk 'BEGIN { printf("%c%c%c%c%c%c", 27, 91, 49, 109, 0, 0); }' </dev/null 2>/dev/null`
- T_ME=`awk 'BEGIN { printf("%c%c%c%c%c", 27, 91, 109, 0, 0); }' </dev/null 2>/dev/null`
- ;;
- *)
- T_MD=''
- T_ME=''
- ;;
-esac
- AC_MSG_RESULT()
- AC_MSG_RESULT([${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 <fcntl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <sys/mman.h>
-#include <stdlib.h>
-#include <utime.h>
-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
-
-])
-
projects / rrdtool.git / blobdiff