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|
#
# Begin pthreads checking.
#
# First, decide whether to use multithreading or not.
#
# Enable multithreading by default on systems where it is known
# to work well, and where debugging of multithreaded programs
# is supported.
#
AC_MSG_CHECKING(whether to build with thread support)
case $host in
*-dec-osf*)
use_threads=true ;;
[*-solaris2.[0-6]])
# Thread signals are broken on Solaris 2.6; they are sometimes
# delivered to the wrong thread.
use_threads=false ;;
*-solaris*)
use_threads=true ;;
*-ibm-aix*)
use_threads=true ;;
*-hp-hpux10*)
use_threads=false ;;
*-hp-hpux11*)
use_threads=true ;;
*-sgi-irix*)
use_threads=true ;;
*-sco-sysv*uw*|*-*-sysv*UnixWare*)
# UnixWare
use_threads=false ;;
*-*-sysv*OpenUNIX*)
# UnixWare
use_threads=true ;;
*-netbsd*)
if test -r /usr/lib/libpthread.so ; then
use_threads=true
else
# Socket I/O optimizations introduced in 9.2 expose a
# bug in unproven-pthreads; see PR #12650
use_threads=false
fi
;;
*-openbsd*)
# OpenBSD users have reported that named dumps core on
# startup when built with threads.
use_threads=false ;;
*-freebsd*)
use_threads=false ;;
*-bsdi[234]*)
# Thread signals do not work reliably on some versions of BSD/OS.
use_threads=false ;;
*-bsdi5*)
use_threads=true ;;
*-linux*)
# Threads are disabled on Linux by default because most
# Linux kernels produce unusable core dumps from multithreaded
# programs, and because of limitations in setuid().
use_threads=false ;;
*)
use_threads=false ;;
esac
AC_ARG_ENABLE(threads,
[ --enable-threads enable multithreading])
case "$enable_threads" in
yes)
use_threads=true
;;
no)
use_threads=false
;;
'')
# Use system-dependent default
;;
*)
AC_MSG_ERROR([--enable-threads takes yes or no])
;;
esac
if $use_threads
then
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
if $use_threads
then
#
# Search for / configure pthreads in a system-dependent fashion.
#
case "$host" in
*-netbsd*)
# NetBSD has multiple pthreads implementations. The
# recommended one to use is "unproven-pthreads". The
# older "mit-pthreads" may also work on some NetBSD
# versions. The PTL2 thread library does not
# currently work with bind9, but can be chosen with
# the --with-ptl2 option for those who wish to
# experiment with it.
CC="gcc"
AC_MSG_CHECKING(which NetBSD thread library to use)
AC_ARG_WITH(ptl2,
[ --with-ptl2 on NetBSD, use the ptl2 thread library (experimental)],
use_ptl2="$withval", use_ptl2="no")
: ${LOCALBASE:=/usr/pkg}
if test "X$use_ptl2" = "Xyes"
then
AC_MSG_RESULT(PTL2)
AC_MSG_WARN(
[linking with PTL2 is highly experimental and not expected to work])
CC=ptlgcc
else
if test -r /usr/lib/libpthread.so
then
AC_MSG_RESULT(native)
LIBS="-lpthread $LIBS"
else
if test ! -d $LOCALBASE/pthreads
then
AC_MSG_RESULT(none)
AC_MSG_ERROR("could not find thread libraries")
fi
if $use_threads
then
AC_MSG_RESULT(mit-pthreads/unproven-pthreads)
pkg="$LOCALBASE/pthreads"
lib1="-L$pkg/lib -Wl,-R$pkg/lib"
lib2="-lpthread -lm -lgcc -lpthread"
LIBS="$lib1 $lib2 $LIBS"
CPPFLAGS="$CPPFLAGS -I$pkg/include"
STD_CINCLUDES="$STD_CINCLUDES -I$pkg/include"
fi
fi
fi
;;
*-freebsd*)
# We don't want to set -lpthread as that break
# the ability to choose threads library at final
# link time and is not valid for all architectures.
PTHREAD=
if test "X$GCC" = "Xyes"; then
saved_cc="$CC"
CC="$CC -pthread"
AC_MSG_CHECKING(for gcc -pthread support);
AC_TRY_LINK([#include <pthread.h>],
[printf("%x\n", pthread_create);],
PTHREAD="yes"
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no))
CC="$saved_cc"
fi
if test "X$PTHREAD" != "Xyes"; then
AC_CHECK_LIB(pthread, pthread_create,,
AC_CHECK_LIB(thr, thread_create,,
AC_CHECK_LIB(c_r, pthread_create,,
AC_CHECK_LIB(c, pthread_create,,
AC_MSG_ERROR("could not find thread libraries")))))
fi
;;
*)
AC_CHECK_LIB(pthread, pthread_create,,
AC_CHECK_LIB(pthread, __pthread_create,,
AC_CHECK_LIB(pthread, __pthread_create_system,,
AC_CHECK_LIB(c_r, pthread_create,,
AC_CHECK_LIB(c, pthread_create,,
AC_MSG_ERROR("could not find thread libraries"))))))
;;
esac
fi
|
