CMakeLists: Only build the selected backend.

We were building both and only using one. Speeds up builds. Change-Id: I37af0973c50c38610e1d7322e29966cf36ae0e23 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/29056Reviewed-by: Nicolas Capens <nicolascapens@google.com> Tested-by: Ben Clayton <bclayton@google.com> Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

CMakeLists: Only build the selected backend.
b99bc1f0 · Ben Clayton · 5e828768 · b99bc1f0
Commit b99bc1f0 authored Apr 15, 2019 by Ben Clayton
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CMakeLists.txt CMakeLists.txt +7 -7

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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1876,15 +1876,16 @@ set_target_properties(SwiftShader PROPERTIES
 )
 target_link_libraries(SwiftShader ${OS_LIBS})
-add_library(ReactorLLVM STATIC ${REACTOR_LLVM_LIST})
+if(${REACTOR_BACKEND} STREQUAL "LLVM")
-set_target_properties(ReactorLLVM PROPERTIES
+    add_library(ReactorLLVM STATIC ${REACTOR_LLVM_LIST})
+    set_target_properties(ReactorLLVM PROPERTIES
        INCLUDE_DIRECTORIES "${COMMON_INCLUDE_DIR}"
        POSITION_INDEPENDENT_CODE 1
        FOLDER "Core"
-)
+    )
-target_link_libraries(ReactorLLVM llvm ${OS_LIBS})
+    target_link_libraries(ReactorLLVM llvm ${OS_LIBS})
-if(REACTOR_EMIT_DEBUG_INFO)
+    if(REACTOR_EMIT_DEBUG_INFO)
        add_library(Libbacktrace STATIC ${LIBBACKTRACE_LIST})
        set_target_properties(Libbacktrace PROPERTIES
            INCLUDE_DIRECTORIES "${LIBBACKTRACE_INCLUDE_DIR}"
@@ -1893,9 +1894,8 @@ if(REACTOR_EMIT_DEBUG_INFO)
        )
        target_link_libraries(Libbacktrace ${OS_LIBS})
        target_link_libraries(ReactorLLVM Libbacktrace)
-endif(REACTOR_EMIT_DEBUG_INFO)
+    endif(REACTOR_EMIT_DEBUG_INFO)
-if(${REACTOR_BACKEND} STREQUAL "LLVM")
    set(Reactor ReactorLLVM)
 elseif(${REACTOR_BACKEND} STREQUAL "Subzero")
    set(Reactor ReactorSubzero)