https://github.com/freebsd/freebsd-ports/blob/214709d9ba3be823d7b73a21cbeb096fdb0b4196/graphics/shaderc/files/patch-system-glslang

--- libshaderc/CMakeLists.txt	2020-12-09 21:30:21 UTC
+++ libshaderc/CMakeLists.txt
@@ -114,7 +114,7 @@ endif(SHADERC_ENABLE_INSTALL)
 
 shaderc_add_tests(
   TEST_PREFIX shaderc_combined
-  LINK_LIBS shaderc_combined ${CMAKE_THREAD_LIBS_INIT}
+  LINK_LIBS shaderc_combined ${SHADERC_LIBS}
   INCLUDE_DIRS include ${shaderc_SOURCE_DIR}/libshaderc_util/include ${glslang_SOURCE_DIR}
                ${spirv-tools_SOURCE_DIR}/include
                ${SPIRV-Headers_SOURCE_DIR}/include

--- libshaderc_util/CMakeLists.txt	2024-01-03 17:45:00 UTC
+++ libshaderc_util/CMakeLists.txt
@@ -46,8 +46,8 @@ target_link_libraries(shaderc_util PRIVATE
 
 find_package(Threads)
 target_link_libraries(shaderc_util PRIVATE
-  glslang SPIRV
-  SPIRV-Tools-opt ${CMAKE_THREAD_LIBS_INIT})
+  glslang MachineIndependent GenericCodeGen SPIRV
+  SPIRV-Tools-opt SPIRV-Tools ${CMAKE_THREAD_LIBS_INIT})
 
 shaderc_add_tests(
   TEST_PREFIX shaderc_util