gnome-objc-checks.m4

gnome/gtk+编程宝典的源代码.

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, $OBJC egcs, "")
  if test "x$OBJC" = "x" ; then
    AC_CHECK_PROGS(OBJC, $OBJC egcc, "")
    if test "x$OBJC" = "x" ; then
      AC_CHECK_PROGS(OBJC, $OBJC gcc, "")
    fi
  fi

  AC_REQUIRE([GNOME_PTHREAD_CHECK])

  OBJC_LIBS="-lobjc $PTHREAD_LIB"
  AC_CHECK_FUNC(sched_yield,,[
    AC_CHECK_LIB(posix4,sched_yield,
		OBJC_LIBS="$OBJC_LIBS -lposix4",, $OBJC_LIBS)])
  AC_SUBST(OBJC_LIBS)

  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 $CFLAGS -o conftest $LDFLAGS conftest.m $OBJC_LIBS 1>&AC_FD_CC 2>&1
      result=$?
      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$ac_cv_prog_objc_works = xyes)
  dnl Also set the shell variable OBJECTIVE_C to "yes" or "no".
  OBJECTIVE_C=$ac_cv_prog_objc_works
])

AC_DEFUN([GNOME_INIT_OBJC],
[
	AC_MSG_CHECKING(for an obGnomeConf.sh)
	my_gnome_libdir=`$GNOME_CONFIG --libdir`
	if test -f $my_gnome_libdir/obGnomeConf.sh; then
	    . $my_gnome_libdir/obGnomeConf.sh
	    AC_MSG_RESULT(found $my_gnome_libdir)
	    ac_cv_have_gnome_objc=yes
	else
	    AC_MSG_RESULT(not found)
	    AC_MSG_WARN(Could not find the obGnomeConf.sh file that is generated by gnome-objc install)
	    ac_cv_have_gnome_objc=no
	fi
	
	dnl Add a conditional on whether or not we have gnome-objc
	AM_CONDITIONAL(HAVE_GNOME_OBJC, test x$ac_cv_have_gnome_objc = xyes)
	HAVE_GNOME_OBJC=$ac_cv_have_gnome_objc

	AC_SUBST(OBGNOME_INCLUDEDIR)
	AC_SUBST(OBGNOME_LIBS)
	AC_SUBST(OBGTK_LIBS)
])