At least lcms wasn't deterministicly detected from sysroot.

This will allow to export LCMS_ENABLED=False when lcms isn't in PACKAGECONFIG.

Upstream-Status: Inappropriate [configuration]

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

diff -uNr Imaging-1.1.7.orig/setup.py Imaging-1.1.7/setup.py
--- Imaging-1.1.7.orig/setup.py	2013-07-22 10:17:02.081457075 +0200
+++ Imaging-1.1.7/setup.py	2013-07-22 13:10:09.029707492 +0200
@@ -39,6 +39,12 @@
 TIFF_ROOT = None
 FREETYPE_ROOT =  os.environ['STAGING_LIBDIR'], os.environ['STAGING_INCDIR']
 LCMS_ROOT = None
+TCL_ENABLED = os.getenv('TCL_ENABLED', "True")
+JPEG_ENABLED = os.getenv('JPEG_ENABLED', "True")
+ZLIB_ENABLED = os.getenv('ZLIB_ENABLED', "True")
+TIFF_ENABLED = os.getenv('TIFF_ENABLED', "True")
+FREETYPE_ENABLED = os.getenv('FREETYPE_ENABLED', "True")
+LCMS_ENABLED = os.getenv('LCMS_ENABLED', "True")
 
 # FIXME: add mechanism to explicitly *disable* the use of a library
 
@@ -220,22 +226,22 @@
             zlib = jpeg = tiff = freetype = tcl = tk = lcms = None
         feature = feature()
 
-        if find_include_file(self, "zlib.h"):
+        if ZLIB_ENABLED == 'True' and find_include_file(self, "zlib.h"):
             if find_library_file(self, "z"):
                 feature.zlib = "z"
             elif sys.platform == "win32" and find_library_file(self, "zlib"):
                 feature.zlib = "zlib" # alternative name
 
-        if find_include_file(self, "jpeglib.h"):
+        if JPEG_ENABLED == 'True' and find_include_file(self, "jpeglib.h"):
             if find_library_file(self, "jpeg"):
                 feature.jpeg = "jpeg"
             elif sys.platform == "win32" and find_library_file(self, "libjpeg"):
                 feature.jpeg = "libjpeg" # alternative name
 
-        if find_library_file(self, "tiff"):
+        if TIFF_ENABLED == 'True' and find_library_file(self, "tiff"):
             feature.tiff = "tiff"
 
-        if find_library_file(self, "freetype"):
+        if FREETYPE_ENABLED == 'True' and find_library_file(self, "freetype"):
             # look for freetype2 include files
             freetype_version = 0
             for dir in self.compiler.include_dirs:
@@ -256,11 +262,11 @@
                 if dir:
                     add_directory(self.compiler.include_dirs, dir, 0)
 
-        if find_include_file(self, "lcms.h"):
+        if LCMS_ENABLED == 'True' and find_include_file(self, "lcms.h"):
             if find_library_file(self, "lcms"):
                 feature.lcms = "lcms"
 
-        if _tkinter and find_include_file(self, "tk.h"):
+        if TCL_ENABLED == 'True' and _tkinter and find_include_file(self, "tk.h"):
             # the library names may vary somewhat (e.g. tcl84 or tcl8.4)
             version = TCL_VERSION[0] + TCL_VERSION[2]
             if find_library_file(self, "tcl" + version):