[PATCH] D73442: [CMake] Support symlinking runtimes under a different name

[Petr Hosek via Phabricator via llvm-commits]

phosek created this revision.
Herald added subscribers: llvm-commits, mgorny.
Herald added a project: LLVM.

When using the per-target runtimes directory layout with the runtimes
build, this change allows symlinking runtimes under a different target
(triple) name. The example use case is as follow:

  set(LLVM_RUNTIME_TARGET_x86_64-linux-gnu_SYMLINK "x86_64-unknown-linux-gnu" CACHE STRING "")

This would create a symlink x86_64-linux-gnu pointing to the
x86_64-unknown-linux-gnu runtime directory.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D73442

Files:
  llvm/runtimes/CMakeLists.txt


Index: llvm/runtimes/CMakeLists.txt
===================================================================
--- llvm/runtimes/CMakeLists.txt
+++ llvm/runtimes/CMakeLists.txt
@@ -555,6 +555,41 @@
           add_dependencies(install-runtimes-stripped install-runtimes-${name}+${multilib}-stripped)
         endforeach()
       endforeach()
+
+      string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
+             ${PACKAGE_VERSION})
+
+      foreach(name ${LLVM_RUNTIME_TARGETS})
+        foreach(symlink ${LLVM_RUNTIME_TARGET_${name}_SYMLINK})
+          if(CMAKE_HOST_UNIX)
+            set(LLVM_LINK_OR_COPY create_symlink)
+          else()
+            set(LLVM_LINK_OR_COPY copy)
+          endif()
+          set(dst_path ${LLVM_LIBRARY_OUTPUT_INTDIR}/clang/${CLANG_VERSION}/${symlink})
+          add_custom_command(TARGET runtimes-${name} POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E ${LLVM_LINK_OR_COPY} "${name}" "${dst_path}")
+
+          foreach(path ${CMAKE_MODULE_PATH})
+            if(EXISTS ${path}/LLVMInstallSymlink.cmake)
+              set(INSTALL_SYMLINK ${path}/LLVMInstallSymlink.cmake)
+              break()
+            endif()
+          endforeach()
+
+          install(SCRIPT ${INSTALL_SYMLINK}
+                  CODE "install_symlink(${symlink} ${name} lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})"
+                  COMPONENT ${symlink})
+
+          add_custom_target(install-runtimes-${symlink}
+                            DEPENDS install-runtimes-${name}
+                            COMMAND "${CMAKE_COMMAND}"
+                                    -DCMAKE_INSTALL_COMPONENT="${symlink}"
+                                    -P "${CMAKE_BINARY_DIR}/cmake_install.cmake"
+                            USES_TERMINAL)
+          add_dependencies(install-runtimes install-runtimes-${symlink})
+        endforeach()
+      endforeach()
     endif()
 
     if(NOT LLVM_BUILD_INSTRUMENTED AND CLANG_ENABLE_BOOTSTRAP)


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