SConstruct : Added INCLUDE_PATHS option

INCLUDE_PATHS is a list argument that can be used to add an arbitrary
list of include paths to be added, with full control over their order
from the options file.

Author: ivanimanishi

Changes

@@ -1,7 +1,11 @@
 10.6.x.x (relative to 10.6.2.0)
 ========
 
+Build
+-----
 
+- SConstruct :
+  - Added `INCLUDE_PATHS` option.
 
 10.6.2.0 (relative to 10.6.1.0)
 ========

SConstruct

@@ -647,6 +647,11 @@ o.Add(
 	BoolVariable( "INSTALL_CREATE_SYMLINKS", "Whether to create symlinks post install", True )
 )
 
+o.Add(
+	"INCLUDE_PATHS",
+	"Additional locations on which to search for include files for the dependencies.",
+	[],
+)
 
 # Test options
 
@@ -803,6 +808,9 @@ dependencyIncludes = [
 	systemIncludeArgument, "$FREETYPE_INCLUDE_PATH",
 ]
 
+for path in env.get( "INCLUDE_PATHS" ) :
+	dependencyIncludes.extend( [ systemIncludeArgument, path ] )
+
 env.Prepend(
 	LIBPATH = [
 		"./lib",