Add cmake option to control installation for in-tree build

.

Author: igorban-intel

CMakeLists.txt

@@ -12,6 +12,8 @@ set(LLVM_GENX_INTRINSICS_VERSION 1.0)
 
 set(LLVM_GENX_INTRINSICS_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
+option(LLVM_GENX_INTRINSICS_IN_TREE_INSTALL "Do install after in-tree build" FALSE)
+
 # check if we build inside llvm or not
 if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
   get_filename_component(LLVM_CMAKE_PATH ${LLVM_DIR} ABSOLUTE BASE_DIR ${CMAKE_BINARY_DIR})

GenXIntrinsics/CMakeLists.txt

@@ -69,14 +69,18 @@ install(TARGETS LLVMGenXIntrinsics EXPORT LLVMGenXIntrinsicsTargets
   INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )
 
-# Legacy export. To remove when all clients switch to new name.
-install(EXPORT LLVMGenXIntrinsicsTargets
-  FILE LLVMGenXIntrinsicsConfig.cmake
-  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/LLVMGenXIntrinsics
-)
-
-set(PACKAGE_NAME VCIntrinsics${LLVM_VERSION_MAJOR})
-install(EXPORT LLVMGenXIntrinsicsTargets
-  FILE ${PACKAGE_NAME}Config.cmake
-  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PACKAGE_NAME}
-)
+# Install Config-file only for external build
+if(BUILD_EXTERNAL OR LLVM_GENX_INTRINSICS_IN_TREE_INSTALL)
+
+  # Legacy export. To remove when all clients switch to new name.
+  install(EXPORT LLVMGenXIntrinsicsTargets
+    FILE LLVMGenXIntrinsicsConfig.cmake
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/LLVMGenXIntrinsics
+  )
+
+  set(PACKAGE_NAME VCIntrinsics${LLVM_VERSION_MAJOR})
+  install(EXPORT LLVMGenXIntrinsicsTargets
+    FILE ${PACKAGE_NAME}Config.cmake
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PACKAGE_NAME}
+  )
+endif() # BUILD_EXTERNAL OR LLVM_GENX_INTRINSICS_IN_TREE_INSTALL