Use shaderc_shared and don't build unnecessary targets

This should speed up compilation on Travis a little bit.

.appveyor.yml

@@ -17,4 +17,4 @@ build_script:
  - cmake --build .
 
  # TODO(cwallez@chromium.org) test on more than Debug.
- - src\tests\Debug\nxt_unittests.exe
+ - Debug\nxt_unittests.exe

.travis.yml

@@ -64,7 +64,7 @@ script:
  - cmake --build .
 
  # Test
- - ./src/tests/nxt_unittests
+ - ./nxt_unittests
 
  # Get out of the build dir
  - cd ..

CMakeLists.txt

@@ -162,6 +162,10 @@ endfunction()
 # Enable the creation of folders for Visual Studio projects
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
+# Output shared libs and executables directly in the build directory
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+
 ################################################################################
 # Generate the C and C++ NXT APIs
 ################################################################################

src/utils/CMakeLists.txt

@@ -55,7 +55,7 @@ if (NXT_ENABLE_VULKAN)
 endif()
 
 add_library(utils STATIC ${UTILS_SOURCES})
-target_link_libraries(utils nxt_backend shaderc nxtcpp nxt)
+target_link_libraries(utils nxt_backend shaderc_shared nxtcpp nxt)
 target_include_directories(utils PUBLIC ${SRC_DIR})
 NXTInternalTarget("" utils)
 if(NOT MSVC)

third_party/CMakeLists.txt

@@ -44,6 +44,14 @@ NXTExternalTarget("third_party" glad)
 set(SPIRV_WERROR OFF CACHE BOOL "" FORCE)
 # Don't add unnecessary shaderc targets
 set(SHADERC_SKIP_TESTS ON)
+set(SHADERC_SKIP_INSTALL ON)
+# Remove unused glslang and spirv-tools parts
+# set(ENABLE_HLSL OFF CACHE BOOL "")
+set(ENABLE_OPT OFF CACHE BOOL "")
+set(ENABLE_GLSLANG_BINARIES OFF CACHE BOOL "")
+set(SKIP_GLSLANG_INSTALL ON CACHE BOOL "")
+set(SKIP_SPIRV_TOOLS_INSTALL ON CACHE BOOL "")
+set(SPIRV_SKIP_EXECUTABLES ON CACHE BOOL "")
 # Help shaderc find the non-standard paths for its dependencies
 set(SHADERC_GOOGLE_TEST_DIR ${CMAKE_CURRENT_SOURCE_DIR}/googletest CACHE STRING "Location of googletest source")
 set(SHADERC_GLSLANG_DIR "${CMAKE_CURRENT_SOURCE_DIR}/glslang" CACHE STRING "Location of glslang source")
@@ -64,6 +72,7 @@ set_target_properties(
     glslc_exe
     install-headers
     shaderc
+    shaderc_shared
     shaderc_util
     shaderc_combined_genfile
     shaderc-online-compile testdata
@@ -71,6 +80,18 @@ set_target_properties(
     SPIRV-Headers-example-1.1
     PROPERTIES FOLDER "third_party/shaderc"
 )
+# Remove a bunch of targets we don't need that are pulled by shaderc and glslang
+set_target_properties(
+    SPIRV-Headers-example-1.1
+    SPIRV-Headers-example
+    glslc_exe
+    SPIRV-Tools-link
+    SPVRemapper
+    shaderc
+    shaderc-online-compile
+    shaderc_combined_genfile
+    PROPERTIES EXCLUDE_FROM_ALL true
+)
 
 # SPIRV-Cross
 set(SPIRV_CROSS_SOURCES