Support newer SDCC versions

Issue #25

Author: karosium

configure.ac

@@ -55,6 +55,21 @@ AC_ARG_ENABLE([firmware],
 	has8051=`sdcc --version 2>&1 | grep "mcs51"`
 	if test "$has8051" == "" ;then
 		AC_MSG_ERROR("Installed SDCC doesn't support 8051 so can't built for EZUSB")
+        else
+                SDCC_MAJOR=`sdcc -v |grep -Po "(\d+?\.\d+?\.\d+?)"|cut -d. -f1`
+                SDCC_MINOR=`sdcc -v |grep -Po "(\d+?\.\d+?\.\d+?)"|cut -d. -f2`
+                SDCC_REV=`sdcc -v |grep -Po "(\d+?\.\d+?\.\d+?)"|cut -d. -f3`
+
+                if test "$SDCC_MAJOR" == 3 ;then
+                        if test "$SDCC_MINOR" -ge 8 ;then
+                                AC_MSG_NOTICE(SDCC 3.8 or greater detected)
+                                AC_CONFIG_COMMANDS[git -C fx2lib checkout master]
+                                AC_CONFIG_COMMANDS[patch -d fx2lib -p1 <fx2lib_master.patch -sN]
+                        else
+                                AC_MSG_NOTICE(pre-3.8 SDCC detected)
+                                AC_CONFIG_COMMANDS[patch -d fx2lib -p1 <fx2lib.patch -sN]
+                        fi
+                fi
 	fi
     fi
     
@@ -69,8 +84,6 @@ AS_IF([test "x$enable_tools" != "xno"], [
   AC_CONFIG_FILES([tools/Makefile])
 ])
 
-AC_CONFIG_COMMANDS[patch -d fx2lib -p1 <fx2lib.patch -sN]
-
 AC_SUBST(SMB_CONF_DIRS)
 
 AC_CONFIG_FILES([lib/Makefile		 

fx2lib_master.patch

@@ -0,0 +1,24 @@
+diff --git a/lib/fx2.mk b/lib/fx2.mk
+index 501040f..359a698 100644
+--- a/lib/fx2.mk
++++ b/lib/fx2.mk
+@@ -41,15 +41,15 @@ VID?=0x04b4
+ PID?=0x8613
+
+ INCLUDES?=""
+-DSCR_AREA?=-Wl"-b DSCR_AREA=0x3e00"
+-INT2JT?=-Wl"-b INT2JT=0x3f00"
++DSCR_AREA?=-Wl"-b DSCR_AREA=0x1e00"
++INT2JT?=-Wl"-b INT2JT=0x1f00"
+ CC=sdcc
+ # these are pretty good settings for most firmwares.
+ # Have to be careful with memory locations for
+ # firmwares that require more xram etc.
+-CODE_SIZE?=--code-size 0x3c00
++CODE_SIZE?=--code-size 0x1c00
+ XRAM_SIZE?=--xram-size 0x0200
+-XRAM_LOC?=--xram-loc 0x3c00
++XRAM_LOC?=--xram-loc 0x1c00
+ BUILDDIR?=build
+
+ FX2LIBDIR?=$(dir $(lastword $(MAKEFILE_LIST)))../