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diff -up irrlicht-1.5/include/IrrCompileConfig.h.optflags irrlicht-1.5/include/IrrCompileConfig.h
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--- irrlicht-1.5/include/IrrCompileConfig.h.optflags	2009-01-08 18:47:11.000000000 -0500
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+++ irrlicht-1.5/include/IrrCompileConfig.h	2009-01-08 18:47:41.000000000 -0500
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@@ -138,7 +138,7 @@ ones. */
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 //! Define _IRR_USE_NON_SYSTEM_ZLIB_ to let irrlicht use the zlib which comes with irrlicht.
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 /** If this is commented out, Irrlicht will try to compile using the zlib installed in the system.
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 	This is only used when _IRR_COMPILE_WITH_ZLIB_ is defined. */
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-#define _IRR_USE_NON_SYSTEM_ZLIB_
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+// #define _IRR_USE_NON_SYSTEM_ZLIB_
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 //! Define _IRR_COMPILE_WITH_JPEGLIB_ to enable compiling the engine using libjpeg.
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@@ -149,7 +149,7 @@ the engine will no longer read .jpeg ima
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 //! Define _IRR_USE_NON_SYSTEM_JPEG_LIB_ to let irrlicht use the jpeglib which comes with irrlicht.
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 /** If this is commented out, Irrlicht will try to compile using the jpeg lib installed in the system.
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 	This is only used when _IRR_COMPILE_WITH_LIBJPEG_ is defined. */
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-#define _IRR_USE_NON_SYSTEM_JPEG_LIB_
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+// #define _IRR_USE_NON_SYSTEM_JPEG_LIB_
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 //! Define _IRR_COMPILE_WITH_LIBPNG_ to enable compiling the engine using libpng.
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@@ -160,7 +160,7 @@ the engine will no longer read .png imag
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 //! Define _IRR_USE_NON_SYSTEM_LIBPNG_ to let irrlicht use the libpng which comes with irrlicht.
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 /** If this is commented out, Irrlicht will try to compile using the libpng installed in the system.
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 	This is only used when _IRR_COMPILE_WITH_LIBPNG_ is defined. */
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-#define _IRR_USE_NON_SYSTEM_LIB_PNG_
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+// #define _IRR_USE_NON_SYSTEM_LIB_PNG_
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 //! Define _IRR_D3D_NO_SHADER_DEBUGGING to disable shader debugging in D3D9
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diff -up irrlicht-1.5/source/Irrlicht/Makefile.optflags irrlicht-1.5/source/Irrlicht/Makefile
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--- irrlicht-1.5/source/Irrlicht/Makefile.optflags	2009-01-08 18:48:16.000000000 -0500
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+++ irrlicht-1.5/source/Irrlicht/Makefile	2009-01-08 18:51:11.000000000 -0500
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@@ -43,13 +43,13 @@ LIBPNGOBJ = libpng/png.o libpng/pngerror
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 EXTRAOBJ =
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 LINKOBJ = $(IRRMESHOBJ) $(IRROBJ) $(IRRPARTICLEOBJ) $(IRRANIMOBJ) \
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 	$(IRRVIDEOOBJ) $(IRRSWRENDEROBJ) $(IRRIOOBJ) $(IRROTHEROBJ) \
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-	$(IRRGUIOBJ) $(ZLIBOBJ) $(JPEGLIBOBJ) $(LIBPNGOBJ) $(EXTRAOBJ)
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+	$(IRRGUIOBJ) $(EXTRAOBJ)
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 ###############
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 #Compiler flags
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-CXXINCS = -I../../include -Izlib -Ijpeglib -Ilibpng
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-CPPFLAGS = $(CXXINCS) -DIRRLICHT_EXPORTS=1
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-CXXFLAGS = -Wall -pipe
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+CXXINCS = -I../../include
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+CPPFLAGS = $(CXXINCS) -DIRRLICHT_EXPORTS=1 $(RPM_OPT_FLAGS)
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+CXXFLAGS = -Wall -pipe $(RPM_OPT_FLAGS)
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 ifndef NDEBUG
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 CXXFLAGS += -g -D_DEBUG
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 else
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@@ -58,7 +58,7 @@ endif
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 ifdef PROFILE
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 CXXFLAGS += -pg
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 endif
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-CFLAGS := -fexpensive-optimizations -O3 -DPNG_THREAD_UNSAFE_OK -DPNG_NO_MMX_CODE -DPNG_NO_MNG_FEATURES
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+CFLAGS := -fexpensive-optimizations -O3 -DPNG_THREAD_UNSAFE_OK -DPNG_NO_MMX_CODE -DPNG_NO_MNG_FEATURES $(RPM_OPT_FLAGS)
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 sharedlib sharedlib_osx: CXXFLAGS += -fpic
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 sharedlib sharedlib_osx: CFLAGS += -fpic
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@@ -74,9 +74,9 @@ STATIC_LIB = libIrrlicht.a
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 IRRLICHT_DLL := ../../bin/Win32-gcc/Irrlicht.dll
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 LIB_PATH = ../../lib/$(SYSTEM)
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 INSTALL_DIR = /usr/local/lib
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-sharedlib: SHARED_LIB = libIrrlicht.so
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+sharedlib install: SHARED_LIB = libIrrlicht.so
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 staticlib sharedlib: LDFLAGS = --no-export-all-symbols --add-stdcall-alias
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-sharedlib: LDFLAGS += -L/usr/X11R6/lib$(LIBSELECT) -lGL -lXxf86vm
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+sharedlib: LDFLAGS += -L/usr/X11R6/lib$(LIBSELECT) -lGL -lXxf86vm -lz -ljpeg -lpng
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 staticlib sharedlib: CXXINCS += -I/usr/X11R6/include
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 #OSX specific options
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@@ -128,7 +128,6 @@ sharedlib_osx: $(LINKOBJ)
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 install:
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 	cp $(LIB_PATH)/$(SHARED_LIB).$(VERSION) $(INSTALL_DIR)
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 	cd $(INSTALL_DIR) && ln -s libIrrlicht.so.$(VERSION) $(SHARED_LIB)
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-	ldconfig -n $(INSTALL_DIR)
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 install_osx:
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 	cp $(LIB_PATH)/$(SHARED_LIB).$(VERSION) $(INSTALL_DIR)