[PATCH] D99321: [clang] Always execute multi-stage install steps

[Shoaib Meenai via Phabricator via cfe-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG0135bc996d82: [clang] Always execute multi-stage install steps (authored by smeenai).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D99321/new/

https://reviews.llvm.org/D99321

Files:
  clang/CMakeLists.txt


Index: clang/CMakeLists.txt
===================================================================
--- clang/CMakeLists.txt
+++ clang/CMakeLists.txt
@@ -867,10 +867,23 @@
     # exclude from main target
     set_target_properties(${NEXT_CLANG_STAGE} PROPERTIES _EP_${target}_EXCLUDE_FROM_MAIN On)
 
+    # Install targets have side effects, so we always want to execute them.
+    # "install" is reserved by CMake and can't be used as a step name for
+    # ExternalProject_Add_Step, so we can match against "^install-" instead of
+    # "^install" to get a tighter match. CMake's installation scripts already
+    # skip up-to-date files, so there's no behavior change if you install to the
+    # same destination multiple times.
+    if(target MATCHES "^install-")
+      set(step_always ON)
+    else()
+      set(step_always OFF)
+    endif()
+
     ExternalProject_Add_Step(${NEXT_CLANG_STAGE} ${target}
       COMMAND ${CMAKE_COMMAND} --build <BINARY_DIR> --target ${target}
       COMMENT "Performing ${target} for '${NEXT_CLANG_STAGE}'"
       DEPENDEES configure
+      ALWAYS ${step_always}
       USES_TERMINAL 1
     )
 


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