allow building RV with older version of OIIO

Newer version of RV (>=2022.3.0) is crashing randomly on startup. After few trial and error the combination that seems to work is to build cortex for RV by using OIIO libraries packaged with RV. That library is older enough so to not contain OpenImageIO_Util library which is assumed to exist in SConstruct configuration. These changes will allow to use that older version.

There still occasional "double memory free" crushes on application close. But I could not yet figure out how to address that. Theoretically that crash is because of incompatible version of boost. However, using proper version of boost doesn't seem enough.

Author: MrPetru

SConstruct

@@ -260,6 +260,10 @@ o.Add(
 	"",
 )
 
+o.Add(
+	BoolVariable( "WITH_OIIO_UTIL", "Build with OpenImageIO_Util", True ),
+)
+
 # Blosc options
 
 o.Add(
@@ -1861,13 +1865,14 @@ imageEnvPrepends = {
 	],
 	"LIBS" : [
 		"OpenImageIO$OIIO_LIB_SUFFIX",
-		"OpenImageIO_Util$OIIO_LIB_SUFFIX",
 	],
 	"CXXFLAGS" : [
 		"-DIECoreImage_EXPORTS",
 		systemIncludeArgument, "$OIIO_INCLUDE_PATH"
 	]
 }
+if imageEnv.get( "WITH_OIIO_UTIL", True ):
+	imageEnvPrepends["LIBS"].append( "OpenImageIO_Util$OIIO_LIB_SUFFIX" )
 
 imageEnv.Prepend( **imageEnvPrepends )
 # Windows uses PATH for to find libraries, we must append to it to make sure we don't overwrite existing PATH entries.
@@ -2219,11 +2224,12 @@ if env["WITH_GL"] and doConfigure :
 				os.path.basename( imageEnv.subst( "$INSTALL_LIB_NAME" ) ),
 				os.path.basename( sceneEnv.subst( "$INSTALL_LIB_NAME" ) ),
 				"OpenImageIO$OIIO_LIB_SUFFIX",
-				"OpenImageIO_Util$OIIO_LIB_SUFFIX",
 				"GLEW$GLEW_LIB_SUFFIX",
 				"boost_wave$BOOST_LIB_SUFFIX",
 			]
 		)
+		if glEnv.get( "WITH_OIIO_UTIL", True ):
+			glEnv.Append( LIBS = [ "OpenImageIO_Util$OIIO_LIB_SUFFIX", ] )
 
 		if env["PLATFORM"]=="darwin" :
 			glEnv.Append(

config/ie/options

@@ -196,6 +196,7 @@ oiioRoot = os.path.join( "/software", "apps", "OpenImageIO", oiioVersion, platfo
 OIIO_INCLUDE_PATH = os.path.join( oiioRoot, "include" )
 OIIO_LIB_PATH = os.path.join( oiioRoot, "lib64" )
 OIIO_LIB_SUFFIX = IEEnv.BuildUtil.libSuffix( "OpenImageIO", oiioLibSuffix )
+WITH_OIIO_UTIL = "true"
 
 FREETYPE_LIB_PATH = os.path.join( "/software", "tools", "lib", platform, compiler, compilerVersion )
 FREETYPE_INCLUDE_PATH = "/usr/include/freetype2"
@@ -436,6 +437,9 @@ if targetApp=="rv" :
 			# the default `OIIO_INCLUDE_PATH` value.
 			OIIO_LIB_PATH = rvLibs
 			OIIO_LIB_SUFFIX = rvReg.get( "OpenImageIOLibSuffix", OIIO_LIB_SUFFIX )
+			# current version of OIIO used by RV doesn't include the Util library
+			# this variable will tell the build process to not require it
+			WITH_OIIO_UTIL = rvReg.get( "WithOpenImageIOUtil", WITH_OIIO_UTIL )
 
 # find doxygen
 DOXYGEN = os.path.join( "/software/apps/doxygen", os.environ["DOXYGEN_VERSION"], platform, "bin", "doxygen" )