Can't portably pass filesystem paths as command-line macros to C.

Generate a header file instead and include that.

src/softIoc/Makefile

@@ -16,9 +16,6 @@ softIoc_DBD += base.dbd
 softIoc_DBD += dlload.dbd
 softIoc_DBD += system.dbd
 
-ABS_INSTALL_DIR = $(shell $(PERL) $(TOOLS)/fullPathName.pl -e $(INSTALL_LOCATION))
-USR_CXXFLAGS += -DEPICS_BASE="$(ABS_INSTALL_DIR)"
-
 softIoc_SRCS += softIoc_registerRecordDeviceDriver.cpp
 softIoc_SRCS_DEFAULT += softMain.cpp
 softIoc_SRCS_vxWorks = -nil-
@@ -28,3 +25,6 @@ softIoc_LIBS = $(EPICS_BASE_IOC_LIBS)
 DB += softIocExit.db
 
 include $(TOP)/configure/RULES
+
+epicsInstallDir.h:
+	$(PERL) ../makeInstallDir.pl $(INSTALL_LOCATION) > $@

src/softIoc/makeInstallDir.pl

@@ -0,0 +1,31 @@
+eval 'exec perl -S $0 ${1+"$@"}'  # -*- Mode: perl -*-
+    if $running_under_some_shell; # registerRecordDeviceDriver 
+#*************************************************************************
+# Copyright (c) 2009 UChicago Argonne LLC, as Operator of Argonne
+#     National Laboratory.
+# EPICS BASE is distributed subject to a Software License Agreement found
+# in file LICENSE that is included with this distribution. 
+#*************************************************************************
+
+use strict;
+
+use FindBin qw($Bin);
+use lib "$Bin/../../lib/perl";
+
+use EPICS::Path;
+
+die "Path to INSTALL_LOCATION missing\n" unless @ARGV == 1;
+
+my $path = AbsPath(shift);
+
+$path =~ s/\\/\\\\/gx;
+
+print "/* THIS IS A GENERATED FILE. DO NOT EDIT! */\n",
+      "\n",
+      "#ifndef INC_epicsInstallDir_H\n",
+      "#define INC_epicsInstallDir_H\n",
+      "\n",
+      "#define EPICS_BASE \"$path\"\n",
+      "\n",
+      "#endif /* INC_epicsInstallDir_H */\n";
+

src/softIoc/softMain.cpp

@@ -70,16 +70,16 @@
 #include "asDbLib.h"
 #include "iocInit.h"
 #include "iocsh.h"
+#include "epicsInstallDir.h"
 
 extern "C" int softIoc_registerRecordDeviceDriver(struct dbBase *pdbbase);
 
-#define QUOTE(x) #x
-#define DBD_FILE(top) QUOTE(top) "/dbd/softIoc.dbd"
-#define EXIT_FILE(top) QUOTE(top) "/db/softIocExit.db"
+#define DBD_FILE EPICS_BASE "/dbd/softIoc.dbd"
+#define EXIT_FILE EPICS_BASE "/db/softIocExit.db"
 
 const char *arg0;
-const char *base_dbd = DBD_FILE(EPICS_BASE);
-const char *exit_db = EXIT_FILE(EPICS_BASE);
+const char *base_dbd = DBD_FILE;
+const char *exit_db = EXIT_FILE;
 
 
 static void exitSubroutine(subRecord *precord) {