[all-commits] [llvm/llvm-project] d9ce31: Re-land "[CMake] Don't enable BUILD_WITH_INSTALL_R...

[Raul Tambre via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: d9ce31ae7d1fc68de0ea1535fd25ef84e69aeb07
      https://github.com/llvm/llvm-project/commit/d9ce31ae7d1fc68de0ea1535fd25ef84e69aeb07
  Author: Raul Tambre <raul at tambre.ee>
  Date:   2021-01-08 (Fri, 08 Jan 2021)

  Changed paths:
    M llvm/cmake/modules/AddLLVM.cmake

  Log Message:
  -----------
  Re-land "[CMake] Don't enable BUILD_WITH_INSTALL_RPATH when using custom build rpath"

Reverted check for empty CMAKE_BUILD_RPATH fixed.

When `BUILD_WITH_INSTALL_RPATH` is enabled it prevents using a custom rpath only
for the build tree as the install rpath will be used. This makes it impossible to run a
runtimes build when compiling with Clang and wanting the installed rpath to be
empty (i.e. `-DCMAKE_BUILD_RPATH="<some path>" -DCMAKE_SKIP_INSTALL_RPATH=ON`).

Disable `BUILD_WITH_INSTALL_RPATH` when `CMAKE_BUILD_RPATH` is non-empty to
allow for such build scenarios.

Differential Revision: https://reviews.llvm.org/D94322