Use a script for creating the clang++ executable.
The previous method used the DESTDIR environment variable at configure
time, but sometimes it is only available at install time. See PR8397.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116689 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/driver/clang_symlink.cmake b/tools/driver/clang_symlink.cmake
new file mode 100644
index 0000000..d3f11d3
--- /dev/null
+++ b/tools/driver/clang_symlink.cmake
@@ -0,0 +1,18 @@
+# We need to execute this script at installation time because the
+# DESTDIR environment variable may be unset at configuration time.
+# See PR8397.
+
+if(UNIX)
+ set(CLANGXX_LINK_OR_COPY create_symlink)
+ set(CLANGXX_DESTDIR $ENV{DESTDIR})
+else()
+ set(CLANGXX_LINK_OR_COPY copy)
+endif()
+
+set(bindir "${CLANGXX_DESTDIR}${CMAKE_INSTALL_PREFIX}/bin/")
+set(clang "${bindir}clang${CMAKE_EXECUTABLE_SUFFIX}")
+set(clangxx "${bindir}clang++${CMAKE_EXECUTABLE_SUFFIX}")
+
+message("Creating clang++ executable based on ${clang}")
+
+execute_process(COMMAND "${CMAKE_COMMAND}" -E ${CLANGXX_LINK_OR_COPY} "${clang}" "${clangxx}")