[compiler-rt] Make SANITIZER_MIN_OSX_VERSION a cache variable (PR #74394)

[Chris Apple via llvm-commits]

https://github.com/cjappl updated https://github.com/llvm/llvm-project/pull/74394

>From 82b8b5b6d81b04d3071e771ea6e6c14c3706684c Mon Sep 17 00:00:00 2001
From: Chris Apple <14171107+cjappl at users.noreply.github.com>
Date: Mon, 4 Dec 2023 15:40:24 -0800
Subject: [PATCH 1/2] Make SANITIZER_MIN_OSX_VERSION a cache variable

---
 compiler-rt/cmake/config-ix.cmake | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/compiler-rt/cmake/config-ix.cmake b/compiler-rt/cmake/config-ix.cmake
index a8e078f1ebc988..cab8178969aa9e 100644
--- a/compiler-rt/cmake/config-ix.cmake
+++ b/compiler-rt/cmake/config-ix.cmake
@@ -457,25 +457,32 @@ if(APPLE)
 
   # Note: In order to target x86_64h on OS X the minimum deployment target must
   # be 10.8 or higher.
+  set(SANITIZER_MIN_OSX_VERSION "" CACHE STRING
+    "Minimum OS X version to target (e.g. 10.10) for sanitizers.")
+
   set(DEFAULT_SANITIZER_MIN_OSX_VERSION 10.10)
   set(DARWIN_osx_MIN_VER_FLAG "-mmacosx-version-min")
-  if(NOT SANITIZER_MIN_OSX_VERSION)
+  if(SANITIZER_MIN_OSX_VERSION STREQUAL "")
     string(REGEX MATCH "${DARWIN_osx_MIN_VER_FLAG}=([.0-9]+)"
            MACOSX_VERSION_MIN_FLAG "${CMAKE_CXX_FLAGS}")
     if(MACOSX_VERSION_MIN_FLAG)
-      set(SANITIZER_MIN_OSX_VERSION "${CMAKE_MATCH_1}")
+      set(MIN_OSX_VERSION "${CMAKE_MATCH_1}")
     elseif(CMAKE_OSX_DEPLOYMENT_TARGET)
-      set(SANITIZER_MIN_OSX_VERSION ${CMAKE_OSX_DEPLOYMENT_TARGET})
+      set(MIN_OSX_VERSION ${CMAKE_OSX_DEPLOYMENT_TARGET})
     else()
-      set(SANITIZER_MIN_OSX_VERSION ${DEFAULT_SANITIZER_MIN_OSX_VERSION})
+      set(MIN_OSX_VERSION ${DEFAULT_SANITIZER_MIN_OSX_VERSION})
     endif()
-    if(SANITIZER_MIN_OSX_VERSION VERSION_LESS "10.7")
+
+    if(MIN_OSX_VERSION VERSION_LESS "10.7")
       message(FATAL_ERROR "macOS deployment target '${SANITIZER_MIN_OSX_VERSION}' is too old.")
     endif()
-    if(SANITIZER_MIN_OSX_VERSION VERSION_GREATER ${DEFAULT_SANITIZER_MIN_OSX_VERSION})
+    if(MIN_OSX_VERSION VERSION_GREATER ${DEFAULT_SANITIZER_MIN_OSX_VERSION})
       message(WARNING "macOS deployment target '${SANITIZER_MIN_OSX_VERSION}' is too new, setting to '${DEFAULT_SANITIZER_MIN_OSX_VERSION}' instead.")
-      set(SANITIZER_MIN_OSX_VERSION ${DEFAULT_SANITIZER_MIN_OSX_VERSION})
+      set(MIN_OSX_VERSION ${DEFAULT_SANITIZER_MIN_OSX_VERSION})
     endif()
+
+    set(SANITIZER_MIN_OSX_VERSION "${MIN_OSX_VERSION}" CACHE STRING
+        "Minimum OS X version to target (e.g. 10.10) for sanitizers." FORCE)
   endif()
 
   # We're setting the flag manually for each target OS

>From 8965bac025017875ab2fc0694cad8ebbbfeddd5a Mon Sep 17 00:00:00 2001
From: Chris Apple <14171107+cjappl at users.noreply.github.com>
Date: Mon, 18 Dec 2023 14:05:13 -0800
Subject: [PATCH 2/2] Setting OSX version after the block if it is not defined

---
 compiler-rt/cmake/config-ix.cmake | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/compiler-rt/cmake/config-ix.cmake b/compiler-rt/cmake/config-ix.cmake
index cab8178969aa9e..c176aa207cd25e 100644
--- a/compiler-rt/cmake/config-ix.cmake
+++ b/compiler-rt/cmake/config-ix.cmake
@@ -455,14 +455,9 @@ if(APPLE)
   set(LSAN_SUPPORTED_OS osx)
   set(STATS_SUPPORTED_OS osx)
 
-  # Note: In order to target x86_64h on OS X the minimum deployment target must
-  # be 10.8 or higher.
-  set(SANITIZER_MIN_OSX_VERSION "" CACHE STRING
-    "Minimum OS X version to target (e.g. 10.10) for sanitizers.")
-
   set(DEFAULT_SANITIZER_MIN_OSX_VERSION 10.10)
   set(DARWIN_osx_MIN_VER_FLAG "-mmacosx-version-min")
-  if(SANITIZER_MIN_OSX_VERSION STREQUAL "")
+  if(NOT SANITIZER_MIN_OSX_VERSION)
     string(REGEX MATCH "${DARWIN_osx_MIN_VER_FLAG}=([.0-9]+)"
            MACOSX_VERSION_MIN_FLAG "${CMAKE_CXX_FLAGS}")
     if(MACOSX_VERSION_MIN_FLAG)
@@ -473,6 +468,8 @@ if(APPLE)
       set(MIN_OSX_VERSION ${DEFAULT_SANITIZER_MIN_OSX_VERSION})
     endif()
 
+    # Note: In order to target x86_64h on OS X the minimum deployment target must
+    # be 10.8 or higher.
     if(MIN_OSX_VERSION VERSION_LESS "10.7")
       message(FATAL_ERROR "macOS deployment target '${SANITIZER_MIN_OSX_VERSION}' is too old.")
     endif()
@@ -482,7 +479,7 @@ if(APPLE)
     endif()
 
     set(SANITIZER_MIN_OSX_VERSION "${MIN_OSX_VERSION}" CACHE STRING
-        "Minimum OS X version to target (e.g. 10.10) for sanitizers." FORCE)
+        "Minimum OS X version to target (e.g. 10.10) for sanitizers.")
   endif()
 
   # We're setting the flag manually for each target OS