support for 4 digit EPICS versions

GNUmakefile

@@ -26,7 +26,7 @@ HEADERS += require.h
 USR_INCLUDES_Linux=-idirafter ${EPICS_BASE}/include 
 
 # Pass T_A to the code
-USR_CFLAGS += -DT_A='"${T_A}"'
+USR_CFLAGS += -DT_A='"${T_A}"' -DEPICSVERSION='"${EPICSVERSION}"'
 
 # This should really go into some global WIN32 config file
 USR_CFLAGS_WIN32 += /D_WIN32_WINNT=0x502

iocsh

@@ -176,16 +176,20 @@ then
         /^[ \t]*EPICS_VERSION[ \t]*=/ {v=$2}
         /^[ \t]*EPICS_REVISION[ \t]*=/ {r=$2}
         /^[ \t]*EPICS_MODIFICATION[ \t]*=/ {m=$2+0}
-        END {print "BASE="v"."r"."m";BASECODE="v*10000+r*100+m}
+        END {print "XBASE="v"."r"."m";BASECODE="v*10000+r*100+m}
     ' < $EPICS_BASE/configure/CONFIG_BASE_VERSION)
 elif [ -f $EPICS_BASE/lib/$EPICS_HOST_ARCH/${LIBPREFIX}Com$LIBPOSTFIX ]
 then
     eval $(strings $EPICS_BASE/lib/$EPICS_HOST_ARCH/${LIBPREFIX}Com$LIBPOSTFIX | awk -F'[.R-]' '
-        /EPICS R[0-9]/ {print "BASE="$2"."$3"."$4";BASECODE="$2*10000+$3*100+$4 }')
+        /EPICS R[0-9]/ {print "XBASE="$2"."$3"."$4";BASECODE="$2*10000+$3*100+$4 }')
 else
     echo "Cannot guess EPICS base version." >&2
     exit 1;
 fi
+if [ ${BASE#$XBASE} = $BASE ]
+then
+    BASE=$XBASE
+fi
 
 # IOC name derives from hostname
 # (trailing possible '\r' under cygwin)

require.c

@@ -266,7 +266,11 @@ int requireDebug;
 
 #define TOSTR(s) TOSTR2(s)
 #define TOSTR2(s) #s
-const char epicsRelease[] = TOSTR(EPICS_VERSION)"."TOSTR(EPICS_REVISION)"."TOSTR(EPICS_MODIFICATION);
+
+#ifndef EPICSVERSION
+#error EPICSVERSION not defined: Compile with USR_CFLAGS += -DEPICSVERSION='"${EPICSVERSION}"'
+#endif
+const char epicsRelease[] = EPICSVERSION;
 const char epicsBasetype[] = TOSTR(EPICS_VERSION)"."TOSTR(EPICS_REVISION);
 
 #ifndef T_A