Fix bug #23967. The gtest and gtest_main targets were exported into the

CMake files and should not be by both build systems and also the targets
were also installed by the CMake build system which they should not be.

The problem was that

- the CMake build of LLVM installs and exports the gtest library
targets. We should not being doing this, these are not part of LLVM.

- the Autoconf/Makefile build of LLVM still had gtest libraries in the
installed LLVMConfig.cmake.

These problems would cause problems for an external project because when
calling llvm_map_components_to_libnames(XXX all) ${XXX} would to contain
LLVM's internal gtest libraries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240981 91177308-0d34-0410-b5e6-96231b3b80d8

cmake/modules/AddLLVM.cmake

@@ -503,11 +503,17 @@ macro(add_llvm_library name)
   else()
     llvm_add_library(${name} ${ARGN})
   endif()
-  set_property( GLOBAL APPEND PROPERTY LLVM_LIBS ${name} )
+  # The gtest libraries should not be installed or exported as a target
+  if ("${name}" STREQUAL gtest OR "${name}" STREQUAL gtest_main)
+    set(_is_gtest TRUE)
+  else()
+    set(_is_gtest FALSE)
+    set_property( GLOBAL APPEND PROPERTY LLVM_LIBS ${name} )
+  endif()
 
   if( EXCLUDE_FROM_ALL )
     set_target_properties( ${name} PROPERTIES EXCLUDE_FROM_ALL ON)
-  else()
+  elseif(NOT _is_gtest)
     if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ${name} STREQUAL "LTO")
       if(ARG_SHARED OR BUILD_SHARED_LIBS)
         if(WIN32 OR CYGWIN)

cmake/modules/Makefile

@@ -47,6 +47,12 @@ ifeq ($(LLVM_LIBS_TO_EXPORT),Error)
 $(error llvm-config --libs failed)
 endif
 
+# Strip out gtest and gtest_main from LLVM_LIBS_TO_EXPORT, these are not
+# installed and won't be available from the install tree.
+# FIXME: If we used llvm-config from the install tree this wouldn't be
+# necessary.
+LLVM_LIBS_TO_EXPORT := $(filter-out gtest gtest_main,$(LLVM_LIBS_TO_EXPORT))
+
 ifndef LLVM_LIBS_TO_EXPORT
 $(error LLVM_LIBS_TO_EXPORT cannot be empty)
 endif
@@ -88,7 +94,8 @@ $(PROJ_OBJ_DIR)/LLVMConfig.cmake: LLVMConfig.cmake.in Makefile $(LLVMBuildCMakeF
 	  -e 's/@LLVM_CONFIG_EXPORTS_FILE@/$${LLVM_CMAKE_DIR}\/LLVMExports.cmake/' \
 	  -e 's/@all_llvm_lib_deps@//' \
 	 && \
-	 grep '^set_property.*LLVMBUILD_LIB_DEPS_' "$(LLVMBuildCMakeFrag)" \
+	 ( grep '^set_property.*LLVMBUILD_LIB_DEPS_' "$(LLVMBuildCMakeFrag)" | \
+	   grep -v LLVMBUILD_LIB_DEPS_gtest ) \
 	) > $@
 
 $(PROJ_OBJ_DIR)/LLVMConfigVersion.cmake: LLVMConfigVersion.cmake.in