PCSX2 upstream modifies shaderc[1][2][3] rendering its code incompatible
with vanilla. We'd rather not package this modified shaderc if it can
reasonably be avoided, so this does minimal code changes to allow vanilla
usage.

Disclaimer: as the author of this patch, be warned that I can hardly claim
to know neither C++ nor shaderc, so it could very well be wrong. If run into
vulkan/shaderc-related issues, try to reproduce with upstream's AppImage
before reporting bugs to them as they offer no support for distros' builds.

[1] https://github.com/PCSX2/pcsx2/commit/1cd4ba269854646
[2] https://github.com/PCSX2/pcsx2/commit/fbfdf1200d27260
[3] https://github.com/PCSX2/pcsx2/commit/ff7995f0d6caaac

Signed-off-by: Ionen Wolkens <ionen@gentoo.org>
--- a/pcsx2/GS/Renderers/Vulkan/VKShaderCache.cpp
+++ b/pcsx2/GS/Renderers/Vulkan/VKShaderCache.cpp
@@ -109,5 +109,5 @@
 	X(shaderc_compile_options_set_optimization_level) \
 	X(shaderc_compile_options_set_target_env) \
-	X(shaderc_compilation_status_to_string) \
+	X(shaderc_result_get_compilation_status) \
 	X(shaderc_compile_into_spv) \
 	X(shaderc_result_release) \
@@ -217,19 +217,16 @@
 	dyn_shaderc::shaderc_compile_options_set_source_language(options, shaderc_source_language_glsl);
 	dyn_shaderc::shaderc_compile_options_set_target_env(options, shaderc_target_env_vulkan, 0);
-	dyn_shaderc::shaderc_compile_options_set_generate_debug_info(options, debug,
-		debug && GSDeviceVK::GetInstance()->GetOptionalExtensions().vk_khr_shader_non_semantic_info);
+	dyn_shaderc::shaderc_compile_options_set_generate_debug_info(options);
 	dyn_shaderc::shaderc_compile_options_set_optimization_level(
 		options, debug ? shaderc_optimization_level_zero : shaderc_optimization_level_performance);
 
-	shaderc_compilation_result_t result;
-	const shaderc_compilation_status status = dyn_shaderc::shaderc_compile_into_spv(
+	shaderc_compilation_result_t result = dyn_shaderc::shaderc_compile_into_spv(
 		dyn_shaderc::s_compiler, source.data(), source.length(), static_cast<shaderc_shader_kind>(stage), "source",
-		"main", options, &result);
-	if (status != shaderc_compilation_status_success)
+		"main", options);
+	if (dyn_shaderc::shaderc_result_get_compilation_status(result) != shaderc_compilation_status_success)
 	{
 		const std::string_view errors(result ? dyn_shaderc::shaderc_result_get_error_message(result) :
 											   "null result object");
-		ERROR_LOG("Failed to compile shader to SPIR-V: {}\n{}",
-			dyn_shaderc::shaderc_compilation_status_to_string(status), errors);
+		ERROR_LOG("Failed to compile shader to SPIR-V: {}", errors);
 		DumpBadShader(source, errors);
 	}