gstreamer/gst/cothreads/configure.ac

dnl ##
dnl ##  NGPT - Next Generation POSIX Threading
dnl ##  Copyright (c) 2001 IBM Corporation <babt@us.ibm.com>
dnl ##  Portions Copyright (c) 1999-2000 Ralf S. Engelschall <rse@engelschall.com>
dnl ##
dnl ##  This file is part of BlueThreads, a non-preemptive thread scheduling
dnl ##  library which can be found at http://www.ibm.com/developer
dnl ##
dnl ##  This library is free software; you can redistribute it and/or
dnl ##  modify it under the terms of the GNU Lesser General Public
dnl ##  License as published by the Free Software Foundation; either
dnl ##  version 2.1 of the License, or (at your option) any later version.
dnl ##
dnl ##  This library is distributed in the hope that it will be useful,
dnl ##  but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl ##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
dnl ##  Lesser General Public License for more details.
dnl ##
dnl ##  You should have received a copy of the GNU Lesser General Public
dnl ##  License along with this library; if not, write to the Free Software
dnl ##  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
dnl ##  USA.
dnl ##
dnl ##  configure.in: ngpt Autoconf specification
dnl ##

dnl # hacked on for inclusion into the gstreamer project 20 Jan 2002 by Andy
dnl # Wingo <wingo@pobox.com>

dnl #                              ``Programming in Bourne-Shell
dnl #                                is a higher form of masochism.''
dnl #                                           -- Unknown

AC_INIT
AM_CONFIG_HEADER(pth_acdef.h)
AM_INIT_AUTOMAKE(pth, 1400)

AC_MSG_PART(Build Tools)

AC_PROG_CC
AC_PROG_CPP
AC_SET_MAKE
AM_PROG_LIBTOOL

dnl ##  Support for some special platform/compiler options
case "$PLATFORM:$CC" in
    *-sun-solaris2*:cc )
        #   shut-up harmless warnings caused by do-while macros on Solaris
        test ".$ac_cv_prog_gcc" = ".no" && PTH_CFLAGS="$PTH_CFLAGS -w"
        ;;
    *-*-sysv*uw[27]*:cc )
        #   shut-up harmless warnings caused by do-while macros on UnixWare
        PTH_CFLAGS="$PTH_CFLAGS -w"
        ;;
    *-hp-hpux*:cc )
        #   HPUX needs a few special options to find its ANSI C brain
        PTH_CFLAGS="$PTH_CFLAGS -Ae -O"
        ;;
    *-hp-hpux*:CC )
        #   HPUX outputs useless warnings
        PTH_CFLAGS="$PTH_CFLAGS -w"
        ;;
    *-sgi-irix6.2:cc )
        #   shut-up warnings caused by IRIX brain-dead 32/64 bit stuff
        PTH_LDFLAGS="$PTH_LDFLAGS -woff 85 -Wl,-woff,84 -Wl,-woff,85"
        ;;
    *-sgi-irix6.5.[2-9]:cc )
        #   since IRIX 6.5.2 the C compiler is smart enough,
        #   but the linker is still complaining, of course
        PTH_LDFLAGS="$PTH_LDFLAGS -woff 84,85,134"
        ;;
    *-sgi-irix6.5:cc )
        #   shut-up warnings caused by IRIX brain-dead 32/64 bit stuff
        PTH_CFLAGS="$PTH_CFLAGS -woff 1110,1048"
        PTH_LDFLAGS="$PTH_LDFLAGS -woff 84,85,134"
        ;;
    *-dec-osf4*:cc )
        #   make sure the standard compliant functions are used on Tru64/OSF1 4.x
        PTH_CFLAGS="$PTH_CFLAGS -std"
        ;;
    *-dec-osf5*:cc )
        #   make sure the standard compliant functions are used on Tru64/OSF1 5.x
        PTH_CFLAGS="$PTH_CFLAGS -std -D_XOPEN_SOURCE_EXTENDED"
        ;;
    *-*-isc*:* )
        #   ISC is brain-dead and needs a bunch of options to find its brain
        PTH_CPPFLAGS="$PTH_CPPFLAGS -D_POSIX_SOURCE";
        PTH_LIBS="$PTH_LIBS -lcposix -linet";
        ;;
esac

AC_MSG_PART(Mandatory Platform Environment)

dnl # check for standard headers
AC_HEADER_STDC
# FIXME
AC_HAVE_HEADERS(dnl
   stdio.h stdlib.h stdarg.h string.h signal.h unistd.h setjmp.h fcntl.h dnl
   errno.h sys/types.h)
AC_CHECK_FUNCTIONS(dnl
   sigaction sigprocmask sigpending sigsuspend)
AC_BEGIN_DECISION([mandatory system headers and functions])
AC_IFALLYES(dnl
   header:stdio.h header:stdlib.h header:stdarg.h header:string.h dnl
   header:signal.h header:unistd.h header:setjmp.h header:fcntl.h header:errno.h dnl
   header:sys/types.h dnl
   func:sigaction func:sigprocmask dnl
   func:sigpending func:sigsuspend,
   AC_DECIDE(fine, [all fine]))
AC_END_DECISION

AC_MSG_PART(Optional Platform Environment)

dnl # check whether ss_base instead of ss_sp attribute exists
AC_CHECK_STRUCTATTR(ss_base, sigaltstack, sys/signal.h)
AC_CHECK_STRUCTATTR(ss_sp,   sigaltstack, sys/signal.h)

dnl ##
dnl ##  MACHINE CONTEXT IMPLEMENTATION
dnl ##

AC_MSG_PART(Machine Context Implementation)

dnl #
dnl #  1. determine possibilities
dnl #

dnl #  check for MCSC method
AC_CHECK_HEADERS(ucontext.h)
AC_CHECK_FUNCTIONS(makecontext swapcontext getcontext setcontext)
AC_CHECK_MCSC(mcsc=yes, mcsc=no)

dnl #  check for SJLJ method
AC_CHECK_HEADERS(signal.h)
AC_CHECK_FUNCTIONS(sigsetjmp siglongjmp setjmp longjmp _setjmp _longjmp)
AC_CHECK_FUNCTIONS(sigaltstack sigstack)
AC_CHECK_SJLJ(sjlj=yes, sjlj=no, sjlj_type)

dnl #
dnl #  2. make a general decision
dnl #

if test ".$mcsc" = .yes; then
    mctx_mth=mcsc
    mctx_dsp=sc
    mctx_stk=mc
elif test ".$sjlj" = .yes; then
    mctx_mth=sjlj
    mctx_dsp=$sjlj_type
    mctx_stk=none
    AC_IFALLYES(func:sigstack,    mctx_stk=ss)
    AC_IFALLYES(func:sigaltstack, mctx_stk=sas)
    case $mctx_dsp in
         sjljlx|sjljisc|sjljw32 ) mctx_stk=none
    esac
else
    AC_ERROR([no appropriate mctx method found])
fi

dnl #
dnl #  3. allow decision to be overridden by user
dnl #

AC_ARG_WITH(mctx-mth,dnl
[  --with-mctx-mth=ID      force mctx method      (mcsc,sjlj)],[
case $withval in
    mcsc|sjlj ) mctx_mth=$withval ;;
    * ) AC_ERROR([invalid mctx method -- allowed: mcsc,sjlj]) ;;
esac
])dnl
AC_ARG_WITH(mctx-dsp,dnl
[  --with-mctx-dsp=ID      force mctx dispatching (sc,ssjlj,sjlj,usjlj,sjlje,...)],[
case $withval in
    sc|ssjlj|sjlj|usjlj|sjlje|sjljlx|sjljisc|sjljw32 ) mctx_dsp=$withval ;;
    * ) AC_ERROR([invalid mctx dispatching -- allowed: sc,ssjlj,sjlj,usjlj,sjlje,sjljlx,sjljisc,sjljw32]) ;;
esac
])dnl
AC_ARG_WITH(mctx-stk,dnl
[  --with-mctx-stk=ID      force mctx stack setup (mc,ss,sas,...)],[
case $withval in
    mc|ss|sas|none ) mctx_stk=$withval ;;
    * ) AC_ERROR([invalid mctx stack setup -- allowed: mc,ss,sas,none]) ;;
esac
])dnl

dnl #
dnl #  4. determine a few additional details
dnl #

dnl #  whether sigaltstack has to use stack_t instead of struct sigaltstack
AC_CHECK_TYPEDEF(stack_t, signal.h)

dnl #  ibm - test whether we need a separate register stack (IA64).
AC_CHECK_NEED_FOR_SEPARATE_STACK(PTH_NEED_SEPARATE_REGISTER_STACK)
dnl #  ibm - end

dnl #  direction of stack grow
AC_CHECK_STACKGROWTH(PTH_STACKGROWTH)
if test ".$ac_cv_check_stackgrowth" = ".down"; then
    PTH_STACK_GROWTH="down"
else
    PTH_STACK_GROWTH="up"
fi
AC_SUBST(PTH_STACK_GROWTH)

dnl #  how to specify stacks for the various functions
AC_CHECK_STACKSETUP(makecontext, pth_skaddr_makecontext, pth_sksize_makecontext)
AC_CHECK_STACKSETUP(sigaltstack, pth_skaddr_sigaltstack, pth_sksize_sigaltstack)
AC_CHECK_STACKSETUP(sigstack,    pth_skaddr_sigstack,    pth_sksize_sigstack)

dnl #  how to implement POSIX compliant sig{set,long}jmp()
case $mctx_dsp in [
    ssjlj )
        pth_sigjmpbuf='sigjmp_buf'
        pth_sigsetjmp='sigsetjmp(buf,1)'
        pth_siglongjmp='siglongjmp(buf,val)'
        ;;
    sjlj )
        pth_sigjmpbuf='jmp_buf'
        pth_sigsetjmp='setjmp(buf)'
        pth_siglongjmp='longjmp(buf,val)'
        ;;
    usjlj )
        pth_sigjmpbuf='jmp_buf'
        pth_sigsetjmp='_setjmp(buf)'
        pth_siglongjmp='_longjmp(buf,val)'
        ;;
    sjlje )
        pth_sigjmpbuf='jmp_buf'
        pth_sigsetjmp='setjmp(buf)'
        pth_siglongjmp='longjmp(buf,val)'
        ;;
    sjljlx|sjljisc|sjljw32 )
        pth_sigjmpbuf='sigjmp_buf'
        pth_sigsetjmp='sigsetjmp(buf,1)'
        pth_siglongjmp='siglongjmp(buf,val)'
        ;;
] esac
pth_sigjmpbuf="#define pth_sigjmpbuf $pth_sigjmpbuf"
pth_sigsetjmp="#define pth_sigsetjmp(buf) $pth_sigsetjmp"
pth_siglongjmp="#define pth_siglongjmp(buf,val) $pth_siglongjmp"
AC_SUBST(pth_sigjmpbuf)
AC_SUBST(pth_sigsetjmp)
AC_SUBST(pth_siglongjmp)

dnl #
dnl #  5. export the results
dnl #

AC_DEFINE_UNQUOTED(PTH_MCTX_MTH_use, [PTH_MCTX_MTH_$mctx_mth])
AC_DEFINE_UNQUOTED(PTH_MCTX_DSP_use, [PTH_MCTX_DSP_$mctx_dsp])
AC_DEFINE_UNQUOTED(PTH_MCTX_STK_use, [PTH_MCTX_STK_$mctx_stk])

PTH_MCTX_ID="$mctx_mth/$mctx_dsp/$mctx_stk"
AC_MSG_RESULT([decision on mctx implementation... ${TB}${PTH_MCTX_ID}${TN}])
AC_SUBST(PTH_MCTX_ID)

AC_MSG_VERBOSE([decided mctx method: $mctx_mth])
AC_MSG_VERBOSE([decided mctx dispatching: $mctx_dsp])
AC_MSG_VERBOSE([decided mctx stack setup: $mctx_stk])


dnl ##  Additional support for some special platform/compiler options
case "$PLATFORM:$CC" in
*-ibm-mvs*:cc | *-ibm-mvs*:c++ )
    mvs_extras='-W "c,float(ieee)" -W "c,langlvl(extended)" -W "c,expo,dll"'
    PTH_CFLAGS="$PTH_CFLAGS $mvs_extras"
    mvs_extras='-W "l,p,map" -W "l,map,list"'
    PTH_LDFLAGS="$PTH_LDFLAGS $mvs_extras"
    ;;
esac

AC_MSG_PART(Output Substitution)

AC_OUTPUT(
Makefile
pth.h
pth_acmac.h
)