update modern glslang (Tencent#5910)

* update modern glslang

* fix build with cpp14

Author: nihui

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "glslang"]
 	path = glslang
-	url = https://github.com/KhronosGroup/glslang
+	url = https://github.com/nihui/glslang
 [submodule "python/pybind11"]
 	path = python/pybind11
 	url = https://github.com/pybind/pybind11.git

CMakeLists.txt

@@ -755,6 +755,8 @@ endif()
 if(NCNN_VULKAN)
     if(NCNN_SYSTEM_GLSLANG)
         find_package(Threads)
+        find_package(SPIRV-Tools QUIET)
+        find_package(SPIRV-Tools-opt QUIET)
         find_package(glslang QUIET)
         if(glslang_FOUND)
             add_library(glslang ALIAS glslang::glslang)
@@ -777,7 +779,7 @@ if(NCNN_VULKAN)
             endif()
         endif()
 
-        if (TARGET glslang AND TARGET SPIRV)
+        if(TARGET glslang AND TARGET SPIRV)
             get_property(glslang_location TARGET glslang PROPERTY LOCATION)
             get_property(SPIRV_location TARGET SPIRV PROPERTY LOCATION)
             message(STATUS "Found glslang: ${glslang_location} (found version \"${glslang_VERSION}\")")
@@ -803,23 +805,17 @@ if(NCNN_VULKAN)
             option(ENABLE_EXCEPTIONS "" OFF)
             option(ENABLE_OPT "" OFF)
             option(ENABLE_PCH "" OFF)
-            option(ENABLE_CTEST "" OFF)
-            if(NCNN_SHARED_LIB)
-                option(SKIP_GLSLANG_INSTALL "" ON)
-            endif()
+            option(GLSLANG_TESTS "" OFF)
+            option(GLSLANG_ENABLE_INSTALL "" ON)
             add_subdirectory(glslang)
             if(NCNN_SHARED_LIB)
                 if(CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES "MSVC"))
                     target_compile_options(glslang PRIVATE -fvisibility=hidden -fvisibility-inlines-hidden)
-                    target_compile_options(OGLCompiler PRIVATE -fvisibility=hidden -fvisibility-inlines-hidden)
-                    target_compile_options(OSDependent PRIVATE -fvisibility=hidden -fvisibility-inlines-hidden)
-                    target_compile_options(SPIRV PRIVATE -fvisibility=hidden -fvisibility-inlines-hidden)
+                    target_compile_options(glslang-default-resource-limits PRIVATE -fvisibility=hidden -fvisibility-inlines-hidden)
                 endif()
                 if(NCNN_ENABLE_LTO)
                     set_target_properties(glslang PROPERTIES INTERPROCEDURAL_OPTIMIZATION ON)
-                    set_target_properties(OGLCompiler PROPERTIES INTERPROCEDURAL_OPTIMIZATION ON)
-                    set_target_properties(OSDependent PROPERTIES INTERPROCEDURAL_OPTIMIZATION ON)
-                    set_target_properties(SPIRV PROPERTIES INTERPROCEDURAL_OPTIMIZATION ON)
+                    set_target_properties(glslang-default-resource-limits PROPERTIES INTERPROCEDURAL_OPTIMIZATION ON)
                 endif()
             endif()
         endif()

cmake/ncnnConfig.cmake.in

@@ -22,6 +22,8 @@ if(NCNN_VULKAN)
 
     if(NOT NCNN_SHARED_LIB)
         if(NCNN_SYSTEM_GLSLANG)
+            find_package(SPIRV-Tools QUIET)
+            find_package(SPIRV-Tools-opt QUIET)
             find_package(glslang QUIET)
             if(NOT glslang_FOUND)
                 set(GLSLANG_TARGET_DIR "@GLSLANG_TARGET_DIR@")