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Diffstat (limited to 'config.threads.in')
| -rw-r--r-- | config.threads.in | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/config.threads.in b/config.threads.in new file mode 100644 index 0000000..c1c113b --- /dev/null +++ b/config.threads.in @@ -0,0 +1,177 @@ +# +# 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 |