* Move dosbox to match Gentoo Portage

* Finish bep file
 * Add small, but required, patch.

I could not submit the patch to dosbox bugtracker with BeZilla. Can someone else have a look at submitting it for me ?

games-emulation/dosbox/dosbox-0.74-svn.bep

@@ -1,4 +1,5 @@
 DESCRIPTION="an x86 emulator with DOS"
+MESSAGE="This port requires gcc4."
 HOMEPAGE="http://www.dosbox.com/"
 SRC_URI="svn://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk/"
 REVISION="1"
@@ -19,7 +20,6 @@ INSTALL {
 }
 
 # no TEST script available
-# no patch available
 
 COPYRIGHT="2012 The DOSBox Team"
 LICENSE="GNU GPL v2"

games-emulation/dosbox/dosbox-0.74-svn.patch

@@ -0,0 +1,20 @@
+Index: configure.in
+===================================================================
+--- configure.in	(revision 3798)
++++ configure.in	(working copy)
+@@ -121,13 +121,8 @@
+ 
+ 
+ dnl Check for powf
+-AC_MSG_CHECKING(for powf in libm);
+-LIBS_BACKUP=$LIBS;
+-LIBS="$LIBS -lm";
+-AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <math.h>]],[[
+-        powf(1.0f, 1.0f);
+-]])], [AC_MSG_RESULT(yes)], [AC_DEFINE([DB_HAVE_NO_POWF],[1],[libm doesn't include powf])])
+-LIBS=$LIBS_BACKUP
++AC_SEARCH_LIBS([powf], [m], [AC_MSG_RESULT(yes)], [AC_DEFINE([DB_HAVE_NO_POWF],[1],[no powf function available])])
++AC_SEARCH_LIBS([getpeername], [network])
+ 
+ 
+ dnl Checks for libraries.