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