diff -up irrlicht-1.7.3/include/IrrCompileConfig.h.optflags irrlicht-1.7.3/include/IrrCompileConfig.h
--- irrlicht-1.7.3/include/IrrCompileConfig.h.optflags	2012-02-19 23:56:18.000000000 -0500
+++ irrlicht-1.7.3/include/IrrCompileConfig.h	2012-06-25 23:05:24.764641714 -0400
@@ -176,7 +176,7 @@ the engine will no longer read .jpeg ima
 //! Define _IRR_USE_NON_SYSTEM_JPEG_LIB_ to let irrlicht use the jpeglib which comes with irrlicht.
 /** If this is commented out, Irrlicht will try to compile using the jpeg lib installed in the system.
 	This is only used when _IRR_COMPILE_WITH_LIBJPEG_ is defined. */
-#define _IRR_USE_NON_SYSTEM_JPEG_LIB_
+// #define _IRR_USE_NON_SYSTEM_JPEG_LIB_
 
 
 //! Define _IRR_COMPILE_WITH_LIBPNG_ to enable compiling the engine using libpng.
@@ -187,7 +187,7 @@ the engine will no longer read .png imag
 //! Define _IRR_USE_NON_SYSTEM_LIBPNG_ to let irrlicht use the libpng which comes with irrlicht.
 /** If this is commented out, Irrlicht will try to compile using the libpng installed in the system.
 	This is only used when _IRR_COMPILE_WITH_LIBPNG_ is defined. */
-#define _IRR_USE_NON_SYSTEM_LIB_PNG_
+// #define _IRR_USE_NON_SYSTEM_LIB_PNG_
 
 
 //! Define _IRR_D3D_NO_SHADER_DEBUGGING to disable shader debugging in D3D9
@@ -348,7 +348,7 @@ ones. */
 /** If this is commented out, Irrlicht will try to compile using the zlib
 installed on the system. This is only used when _IRR_COMPILE_WITH_ZLIB_ is
 defined. */
-#define _IRR_USE_NON_SYSTEM_ZLIB_
+// #define _IRR_USE_NON_SYSTEM_ZLIB_
 //! Define _IRR_COMPILE_WITH_ZIP_ENCRYPTION_ if you want to read AES-encrypted ZIP archives
 #define _IRR_COMPILE_WITH_ZIP_ENCRYPTION_
 //! Define _IRR_COMPILE_WITH_BZIP2_ if you want to support bzip2 compressed zip archives
@@ -360,7 +360,7 @@ library. */
 /** If this is commented out, Irrlicht will try to compile using the bzlib
 installed on the system. This is only used when _IRR_COMPILE_WITH_BZLIB_ is
 defined. */
-#define _IRR_USE_NON_SYSTEM_BZLIB_
+// #define _IRR_USE_NON_SYSTEM_BZLIB_
 //! Define _IRR_COMPILE_WITH_LZMA_ if you want to use LZMA compressed zip files.
 /** LZMA is a very efficient compression code, known from 7zip. Irrlicht
 currently only supports zip archives, though. */
diff -up irrlicht-1.7.3/source/Irrlicht/Makefile.optflags irrlicht-1.7.3/source/Irrlicht/Makefile
--- irrlicht-1.7.3/source/Irrlicht/Makefile.optflags	2012-02-19 23:54:06.000000000 -0500
+++ irrlicht-1.7.3/source/Irrlicht/Makefile	2012-06-25 23:06:41.486647385 -0400
@@ -49,18 +49,17 @@ BZIP2OBJ = bzip2/blocksort.o bzip2/huffm
 EXTRAOBJ =
 LINKOBJ = $(IRRMESHOBJ) $(IRROBJ) $(IRRPARTICLEOBJ) $(IRRANIMOBJ) \
 	$(IRRVIDEOOBJ) $(IRRSWRENDEROBJ) $(IRRIOOBJ) $(IRROTHEROBJ) \
-	$(IRRGUIOBJ) $(ZLIBOBJ) $(JPEGLIBOBJ) $(LIBPNGOBJ) $(LIBAESGM) \
-	$(BZIP2OBJ) $(EXTRAOBJ)
+	$(IRRGUIOBJ) $(EXTRAOBJ)
 
 ###############
 #Compiler flags
-CXXINCS = -I../../include -Izlib -Ijpeglib -Ilibpng
-CPPFLAGS += $(CXXINCS) -DIRRLICHT_EXPORTS=1
-CXXFLAGS += -Wall -pipe -fno-exceptions -fno-rtti -fstrict-aliasing
+CXXINCS = -I../../include `libpng-config --cflags`
+CPPFLAGS += $(CXXINCS) -DIRRLICHT_EXPORTS=1 $(RPM_OPT_FLAGS)
+CXXFLAGS += $(RPM_OPT_FLAGS) -Wall -pipe -fno-exceptions -fno-rtti -fstrict-aliasing
 ifndef NDEBUG
 CXXFLAGS += -g -D_DEBUG
 else
-CXXFLAGS += -fexpensive-optimizations -O3
+CXXFLAGS += -fexpensive-optimizations -O3 $(RPM_OPT_FLAGS)
 endif
 ifdef PROFILE
 CXXFLAGS += -pg
@@ -82,7 +81,7 @@ LIB_PATH = ../../lib/$(SYSTEM)
 INSTALL_DIR = /usr/local/lib
 sharedlib install: SHARED_LIB = libIrrlicht.so
 #staticlib sharedlib: LDFLAGS += --no-export-all-symbols --add-stdcall-alias
-sharedlib: LDFLAGS += -L/usr/X11R6/lib$(LIBSELECT) -lGL -lXxf86vm
+sharedlib: LDFLAGS += -L/usr/X11R6/lib$(LIBSELECT) -lGL -lXxf86vm -lz -ljpeg `libpng-config --libs` -lbz2 -laesgm
 staticlib sharedlib: CXXINCS += -I/usr/X11R6/include
 
 #OSX specific options