[compiler-rt] [llvm] Revert "[compiler-rt] Disable LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON on AIX. (#131200)" (PR #132574)

[Daniel Chen via llvm-commits]

https://github.com/DanielCChen created https://github.com/llvm/llvm-project/pull/132574

…

This reverts commit 8e773d8a10cc996fbbe834f59ed9f7044c3539e0.

>From 5a868428138c8269d644bdbdec0e7782a55a0291 Mon Sep 17 00:00:00 2001
From: Daniel Chen <cdchen at ca.ibm.com>
Date: Sat, 22 Mar 2025 20:39:45 -0400
Subject: [PATCH] Revert "[compiler-rt] Disable
 LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON on AIX. (#131200)"

This reverts commit 8e773d8a10cc996fbbe834f59ed9f7044c3539e0.
---
 compiler-rt/cmake/base-config-ix.cmake |  2 +-
 llvm/CMakeLists.txt                    | 13 +++----------
 runtimes/CMakeLists.txt                |  7 -------
 3 files changed, 4 insertions(+), 18 deletions(-)

diff --git a/compiler-rt/cmake/base-config-ix.cmake b/compiler-rt/cmake/base-config-ix.cmake
index c2a861583b9c1..d92bc0e71fa1a 100644
--- a/compiler-rt/cmake/base-config-ix.cmake
+++ b/compiler-rt/cmake/base-config-ix.cmake
@@ -109,7 +109,7 @@ if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
   extend_path(default_install_path "${COMPILER_RT_INSTALL_PATH}" lib)
   set(COMPILER_RT_INSTALL_LIBRARY_DIR "${default_install_path}" CACHE PATH
     "Path where built compiler-rt libraries should be installed.")
-else()
+else(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
   set(COMPILER_RT_OUTPUT_LIBRARY_DIR
     ${COMPILER_RT_OUTPUT_DIR}/lib/${COMPILER_RT_OS_DIR})
   extend_path(default_install_path "${COMPILER_RT_INSTALL_PATH}" "lib/${COMPILER_RT_OS_DIR}")
diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index e76bc9b9ab778..f9ace9f078e2b 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -1186,9 +1186,9 @@ endif()
 # Build with _XOPEN_SOURCE on AIX, as stray macros in _ALL_SOURCE mode tend to
 # break things. In this case we need to enable the large-file API as well.
 if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
-  add_compile_definitions(_XOPEN_SOURCE=700)
-  add_compile_definitions(_LARGE_FILE_API)
-  add_compile_options(-pthread)
+          add_compile_definitions(_XOPEN_SOURCE=700)
+          add_compile_definitions(_LARGE_FILE_API)
+          add_compile_options(-pthread)
 
   # Modules should be built with -shared -Wl,-G, so we can use runtime linking
   # with plugins.
@@ -1196,13 +1196,6 @@ if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
 
   # Also set the correct flags for building shared libraries.
   string(APPEND CMAKE_SHARED_LINKER_FLAGS " -shared")
-
-  # Set LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF as AIX doesn't support it
-  if (LLVM_ENABLE_PER_TARGET_RUNTIME_DIR)
-    message(WARNING
-    "LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON is not supported on AIX. LLVM_ENABLE_PER_TARGET_RUNTIME_DIR is set to OFF.")
-    set(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR OFF CACHE BOOL "" FORCE)
-  endif()
 endif()
 
 # Build with _XOPEN_SOURCE on z/OS.
diff --git a/runtimes/CMakeLists.txt b/runtimes/CMakeLists.txt
index 437dcb1365b18..7f1e2ae065d6c 100644
--- a/runtimes/CMakeLists.txt
+++ b/runtimes/CMakeLists.txt
@@ -223,13 +223,6 @@ endif()
 # This can be used to detect whether we're in the runtimes build.
 set(LLVM_RUNTIMES_BUILD ON)
 
-if (LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
-  # Set LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF as AIX doesn't support it
-  message(WARNING
-  "LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON is not supported on AIX. LLVM_ENABLE_PER_TARGET_RUNTIME_DIR is set to OFF.")
-  set(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR OFF CACHE BOOL "" FORCE)
-endif()
-
 foreach(entry ${runtimes})
   get_filename_component(projName ${entry} NAME)