Adapt the rcg build process to use rts-cpu-isolator symvers file.

 * work towards #335
 * modify find_module_symvers to user argparser and have a quiet option to make missing symvers files empty strings
 * update the src/epics/util/Makefile.in to pass the location of the rts cpu isolator symver file to feCodeGen.pl
 * update createKernelMakefile.pm to add the rts cpu isolator symvers file to the KBUILD_EXTRA_SYMBOLS for the module

src/epics/util/Makefile.in

@@ -23,10 +23,11 @@ PERFORMANCEFLAGS=-DNDEBUG -g -O5
 RELEASEFLAGS=-DNDEBUG -DNPROBE -g -O5
 #DEBUGFLAGS=-DNDEBUG -O5 -unroll=16
 DEVFLAGS=@DEVFLAGS@
-MBUFSYM := $(shell $(srcdir)/find_module_symvers mbuf)
-GPSSYM := $(shell $(srcdir)/find_module_symvers gpstime)
+MBUFSYM := $(shell $(srcdir)/find_module_symvers -q mbuf)
+GPSSYM := $(shell $(srcdir)/find_module_symvers -q gpstime)
+CPUISOSYM := $(shell $(srcdir)/find_module_symvers -q rts-cpu-isolator)
 
 %:
-	env RCG_SRC_DIR=$(top_srcdir) PERL5LIB=$(srcdir) MBUFSYM=$(MBUFSYM) GPSSYM=$(GPSSYM) $(srcdir)/feCodeGen.pl $@.mdl $@
+	env RCG_SRC_DIR=$(top_srcdir) PERL5LIB=$(srcdir) MBUFSYM=$(MBUFSYM) GPSSYM=$(GPSSYM) CPUISOSYM=$(CPUISOSYM) $(srcdir)/feCodeGen.pl $@.mdl $@
 
 all: 

src/epics/util/feCodeGen.pl

@@ -70,6 +70,7 @@ $currWorkDir = &Cwd::cwd();
 $rcg_src_dir = $ENV{"RCG_SRC_DIR"};
 $mbufsymfile = $ENV{"MBUFSYM"};
 $gpssymfile = $ENV{"GPSSYM"};
+$cpuisolatorfile = $ENV{"CPUISOSYM"};
 $dolphinGen = 2;
 
 if (! length $rcg_src_dir) { $rcg_src_dir = "$currWorkDir/../../.."; }

src/epics/util/find_module_symvers

@@ -4,10 +4,15 @@ import os
 import sys
 import subprocess
 
-try:
-    modname = sys.argv[1]
-except IndexError:
-    exit("usage: {} <modname>".format(sys.argv[0]))
+import argparse
+
+parser = argparse.ArgumentParser(description='A utility to search for symvers files for dkms kernel modules')
+parser.add_argument('modname', help='Name of the module to search for a symvers file for.')
+parser.add_argument('-q', '--quiet', default=False, action='store_true', help='Request no output on errors')
+
+args = parser.parse_args()
+modname = args.modname
+quiet_err = args.quiet
 
 uname = os.uname()
 modstat = subprocess.run(
@@ -37,4 +42,6 @@ if os.path.exists(modsym):
     print(modsym)
     exit()
 
+if quiet_err:
+    exit(1)
 exit("Module '{}' symvers file could not be found.".format(modname))

src/epics/util/lib/createKernelMakefile.pm

@@ -15,6 +15,7 @@ print OUTM "# CPU-Shutdown Real Time Linux\n";
 print OUTM "KBUILD_EXTRA_SYMBOLS=$::rcg_src_dir/src/drv/ExtraSymbols.symvers\n";
 print OUTM "KBUILD_EXTRA_SYMBOLS += $::mbufsymfile\n";
 print OUTM "KBUILD_EXTRA_SYMBOLS += $::gpssymfile\n";
+print OUTM "KBUILD_EXTRA_SYMBOLS += $::cpuisolatorfile\n";
 print OUTM "KBUILD_EXTRA_SYMBOLS += \$(PWD)/ModuleIOP.symvers\n";
 print OUTM "ALL \+= user_mmap \$(TARGET_RTL)\n";
 print OUTM "EXTRA_CFLAGS += -O -w -I../../include\n";