path: root/macros/gnome-objc-checks.m4

AC_DEFUN([GNOME_CHECK_OBJC],
[
dnl Look for an ObjC compiler.
dnl FIXME: extend list of possible names of ObjC compilers.
    AC_CHECK_PROGS(OBJC, $OBJC gcc, "")


    oLIBS=$LIBS
    LIBS="$LIBS $PTHREAD_LIB"
    AC_CHECK_FUNC(sched_yield,,[
      AC_CHECK_LIB(posix4,sched_yield,PTHREAD_LIB="$PTHREAD_LIB -lposix4")])
    LIBS=$oLIBS

    AC_CACHE_CHECK([if Objective C compiler ($OBJC) works],
               ac_cv_prog_objc_works, [
    if test -n "$OBJC"; then
       cat > conftest.m <<EOF
    #include <objc/Object.h>
    @interface myRandomObj : Object
    {
    }
    @end
    @implementation myRandomObj
    @end
    int main () {
      /* No, you are not seeing double.  Remember that square brackets
         are the autoconf m4 quotes.  */
      id myid = [[myRandomObj alloc]];
      [[myid free]];
      return 0;
    }
    EOF

       $OBJC -o conftest $LDFLAGS conftest.m -lobjc $PTHREAD_LIB 1>&AC_FD_CC 2>&1
       result=$?
       rm -f conftest*

       if test $result -eq 0; then
          ac_cv_prog_objc_works=yes
       fi
    else
       ac_cv_prog_objc_works=no
    fi
    ])

    AM_CONDITIONAL(OBJECTIVE_C, test x$ac_cv_prog_objc_works = xyes)
])