Latest compatible version of Classicube from the original GitHub repository (https://github.com/ClassiCube/ClassiCube) that can be compiled on Classicube for PowerMac PPC running Mac OS X 10.4.

misc/vita/readme.txt

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+Shaders on the PS Vita use the proprietary .gxp binary format
+
+To compile CG shaders to .gxp you need to use
+1) Extract libshacccg.suprx - see https://cimmerian.gitbook.io/vita-troubleshooting-guide/shader-compiler/extract-libshacccg.suprx
+2) Use vitaShaRK to compile the CG shader (see sample 3 in https://github.com/Rinnegatamante/vitaShaRK for some reference)
+
+You can then use compiled gxp_to_c to convert all the .gxp shaders into .h files, which src/Graphics_PSVita.c can then include
+
+Note that you only need to perform these steps if you want to compile modified shaders - you don't need libshacccg.suprx to run ClassiCube