CMake: Only build turbo-cov with clang + llvm 10

turbo-cov can only process clang coverage information, so there's no point building it for other toolchains. turbo-cov depends on the llvm-10 libs and headers, and does not build against llvm-7. Bug: b/152192800 Change-Id: I522ecb3adfbd448aa47673c452a83083134a36ca Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/44728 Kokoro-Result: kokoro <noreply+kokoro@google.com> Reviewed-by: Nicolas Capens <nicolascapens@google.com> Tested-by: Ben Clayton <bclayton@google.com>

CMake: Only build turbo-cov with clang + llvm 10
6ce626b4 · Ben Clayton · c4bbd378 · 6ce626b4
Commit 6ce626b4 authored May 05, 2020 by Ben Clayton
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CMakeLists.txt CMakeLists.txt +3 -1

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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -723,7 +723,9 @@ if(SWIFTSHADER_BUILD_VULKAN)
    add_subdirectory(src/Device) # Add vk_device target
    add_subdirectory(src/Vulkan) # Add vk_swiftshader target
-    if(SWIFTSHADER_EMIT_COVERAGE)
+    if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND # turbo-cov is only useful for clang coverage info
+       SWIFTSHADER_LLVM_VERSION EQUAL "10.0" AND # turbo-cov does not build with earlier llvm versions
+       SWIFTSHADER_EMIT_COVERAGE)
        add_subdirectory(${TESTS_DIR}/regres/cov/turbo-cov)
    endif()