[compiler-rt] [llvm] Revert "[runtimes] Allow building against an installed LLVM tree" (PR #113920)

[Nikolas Klauser via llvm-commits]

https://github.com/philnik777 created https://github.com/llvm/llvm-project/pull/113920

Reverts llvm/llvm-project#86209

This patch breaks running tests locally, which is extremely disruptive to libc++ development.


>From 4a87591fa133dff0cf30bbffacfb536cdb064614 Mon Sep 17 00:00:00 2001
From: Nikolas Klauser <nikolasklauser at berlin.de>
Date: Mon, 28 Oct 2024 15:46:49 +0100
Subject: [PATCH] Revert "[runtimes] Allow building against an installed LLVM
 tree"

This reverts commit b1be21394e9c8fee1d2092c9e6a789121ab214be.
---
 compiler-rt/cmake/Modules/AddCompilerRT.cmake |  1 -
 compiler-rt/test/hwasan/lit.cfg.py            |  9 ------
 compiler-rt/test/lit.common.configured.in     |  1 -
 runtimes/CMakeLists.txt                       | 29 +++++++------------
 4 files changed, 10 insertions(+), 30 deletions(-)

diff --git a/compiler-rt/cmake/Modules/AddCompilerRT.cmake b/compiler-rt/cmake/Modules/AddCompilerRT.cmake
index b2f33d1a961c74..e3d81d241b1054 100644
--- a/compiler-rt/cmake/Modules/AddCompilerRT.cmake
+++ b/compiler-rt/cmake/Modules/AddCompilerRT.cmake
@@ -773,7 +773,6 @@ function(configure_compiler_rt_lit_site_cfg input output)
 
   string(REPLACE ${CMAKE_CFG_INTDIR} ${LLVM_BUILD_MODE} COMPILER_RT_RESOLVED_TEST_COMPILER ${COMPILER_RT_TEST_COMPILER})
   string(REPLACE ${CMAKE_CFG_INTDIR} ${LLVM_BUILD_MODE} COMPILER_RT_RESOLVED_OUTPUT_DIR ${COMPILER_RT_OUTPUT_DIR})
-  string(REPLACE ${CMAKE_CFG_INTDIR} ${LLVM_BUILD_MODE} COMPILER_RT_RESOLVED_EXEC_OUTPUT_DIR ${COMPILER_RT_EXEC_OUTPUT_DIR})
   string(REPLACE ${CMAKE_CFG_INTDIR} ${LLVM_BUILD_MODE} COMPILER_RT_RESOLVED_LIBRARY_OUTPUT_DIR ${output_dir})
 
   configure_lit_site_cfg(${input} ${output})
diff --git a/compiler-rt/test/hwasan/lit.cfg.py b/compiler-rt/test/hwasan/lit.cfg.py
index bbf23e683240ac..594f3294a84ac1 100644
--- a/compiler-rt/test/hwasan/lit.cfg.py
+++ b/compiler-rt/test/hwasan/lit.cfg.py
@@ -2,9 +2,6 @@
 
 import os
 
-from lit.llvm import llvm_config
-from lit.llvm.subst import ToolSubst, FindTool
-
 # Setup config name.
 config.name = "HWAddressSanitizer" + getattr(config, "name_suffix", "default")
 
@@ -77,12 +74,6 @@ def build_invocation(compile_flags):
     ("%env_hwasan_opts=", "env HWASAN_OPTIONS=" + default_hwasan_opts_str)
 )
 
-# Ensure that we can use hwasan_symbolize from the expected location
-llvm_config.add_tool_substitutions(
-    [ToolSubst("hwasan_symbolize", unresolved="fatal")],
-    search_dirs=[config.compiler_rt_bindir],
-)
-
 # Default test suffixes.
 config.suffixes = [".c", ".cpp"]
 
diff --git a/compiler-rt/test/lit.common.configured.in b/compiler-rt/test/lit.common.configured.in
index 050792b6b26217..66935c358afedd 100644
--- a/compiler-rt/test/lit.common.configured.in
+++ b/compiler-rt/test/lit.common.configured.in
@@ -28,7 +28,6 @@ set_default("python_executable", "@Python3_EXECUTABLE@")
 set_default("compiler_rt_debug", @COMPILER_RT_DEBUG_PYBOOL@)
 set_default("compiler_rt_intercept_libdispatch", @COMPILER_RT_INTERCEPT_LIBDISPATCH_PYBOOL@)
 set_default("compiler_rt_output_dir", "@COMPILER_RT_RESOLVED_OUTPUT_DIR@")
-set_default("compiler_rt_bindir", "@COMPILER_RT_RESOLVED_EXEC_OUTPUT_DIR@")
 set_default("compiler_rt_libdir", "@COMPILER_RT_RESOLVED_LIBRARY_OUTPUT_DIR@")
 set_default("emulator", "@COMPILER_RT_EMULATOR@")
 set_default("asan_shadow_scale", "@COMPILER_RT_ASAN_SHADOW_SCALE@")
diff --git a/runtimes/CMakeLists.txt b/runtimes/CMakeLists.txt
index 67368dcedb3bf6..830165c799c2ab 100644
--- a/runtimes/CMakeLists.txt
+++ b/runtimes/CMakeLists.txt
@@ -239,23 +239,6 @@ foreach(entry ${runtimes})
 endforeach()
 
 if(LLVM_INCLUDE_TESTS)
-  # If built with the runtimes build (rooted at runtimes/CMakeLists.txt), we
-  # won't have llvm-lit. If built with the bootstrapping build (rooted at
-  # llvm/CMakeLists.txt), the top-level llvm CMake invocation already generated
-  # the llvm-lit script.
-  if (NOT HAVE_LLVM_LIT)
-    # Add lit before adding any runtimes since their CMake tests configuration
-    # might depend on lit being present.
-    set(LLVM_LIT_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/bin)
-    add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/llvm-lit
-                     ${CMAKE_CURRENT_BINARY_DIR}/llvm-lit)
-    # Ensure that the testsuites use the local lit rather than
-    # ${LLVM_INSTALL_DIR}/bin/llvm-lit (which may not exist if LLVM_BINARY_DIR
-    # points at an installed LLVM tree rather than a build tree).
-    get_llvm_lit_path(_base_dir _file_name)
-    set(LLVM_EXTERNAL_LIT "${_base_dir}/${_file_name}" CACHE STRING "Command used to spawn lit" FORCE)
-  endif()
-
   set(LIT_ARGS_DEFAULT "-sv --show-xfail --show-unsupported")
   if (MSVC OR XCODE)
     set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
@@ -289,6 +272,14 @@ if(LLVM_INCLUDE_TESTS)
   # and we know the total set of lit testsuites.
   umbrella_lit_testsuite_end(check-runtimes)
 
+  if (NOT HAVE_LLVM_LIT)
+    # If built by manually invoking cmake on this directory, we don't have
+    # llvm-lit. If invoked via llvm/runtimes, the toplevel llvm cmake
+    # invocation already generated the llvm-lit script.
+    add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/llvm-lit
+                     ${CMAKE_CURRENT_BINARY_DIR}/llvm-lit)
+  endif()
+
   get_property(LLVM_RUNTIMES_LIT_TESTSUITES GLOBAL PROPERTY LLVM_RUNTIMES_LIT_TESTSUITES)
   string(REPLACE ";" "\n" LLVM_RUNTIMES_LIT_TESTSUITES "${LLVM_RUNTIMES_LIT_TESTSUITES}")
   file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/lit.tests ${LLVM_RUNTIMES_LIT_TESTSUITES})
@@ -318,10 +309,10 @@ if(SUB_COMPONENTS)
   if(LLVM_RUNTIMES_TARGET)
     configure_file(
       ${CMAKE_CURRENT_SOURCE_DIR}/Components.cmake.in
-      ${CMAKE_CURRENT_BINARY_DIR}/runtimes/${LLVM_RUNTIMES_TARGET}/Components.cmake)
+      ${LLVM_BINARY_DIR}/runtimes/${LLVM_RUNTIMES_TARGET}/Components.cmake)
   else()
     configure_file(
       ${CMAKE_CURRENT_SOURCE_DIR}/Components.cmake.in
-      ${CMAKE_CURRENT_BINARY_DIR}/runtimes/Components.cmake)
+      ${LLVM_BINARY_DIR}/runtimes/Components.cmake)
   endif()
 endif()