https://github.com/daltenty updated 
https://github.com/llvm/llvm-project/pull/154537

>From d642441854a74abcf5d3aa651abdec3465e78188 Mon Sep 17 00:00:00 2001
From: David Tenty <dalte...@ibm.com>
Date: Wed, 20 Aug 2025 00:08:58 -0400
Subject: [PATCH 1/4] [NFC][CMake] quote ${CMAKE_SYSTEM_NAME} consistently

---
 llvm/cmake/modules/AddLLVM.cmake              | 26 +++++++++----------
 llvm/cmake/modules/HandleLLVMOptions.cmake    | 25 +++++++++++-------
 llvm/lib/Target/CMakeLists.txt                |  2 +-
 llvm/lib/TargetParser/CMakeLists.txt          |  2 +-
 llvm/tools/llvm-jitlink/CMakeLists.txt        |  4 +--
 .../Support/DynamicLibrary/CMakeLists.txt     |  6 ++---
 mlir/cmake/modules/FindSyclRuntime.cmake      |  2 +-
 offload/cmake/OpenMPTesting.cmake             |  2 +-
 openmp/CMakeLists.txt                         |  2 +-
 openmp/cmake/OpenMPTesting.cmake              |  2 +-
 openmp/runtime/CMakeLists.txt                 |  2 +-
 openmp/runtime/cmake/LibompHandleFlags.cmake  |  6 ++---
 openmp/runtime/src/CMakeLists.txt             |  4 +--
 third-party/benchmark/src/CMakeLists.txt      |  4 +--
 third-party/unittest/CMakeLists.txt           |  2 +-
 15 files changed, 48 insertions(+), 43 deletions(-)

diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
index 83772ed8d2b13..835750e2d2a13 100644
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -99,7 +99,7 @@ function(llvm_update_compile_flags name)
 endfunction()
 
 function(add_llvm_symbol_exports target_name export_file)
-  if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+  if("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
     set(native_export_file "${target_name}.exports")
     add_custom_command(OUTPUT ${native_export_file}
       COMMAND sed -e "s/^/_/" < ${export_file} > ${native_export_file}
@@ -108,7 +108,7 @@ function(add_llvm_symbol_exports target_name export_file)
       COMMENT "Creating export file for ${target_name}")
     set_property(TARGET ${target_name} APPEND_STRING PROPERTY
                  LINK_FLAGS " 
-Wl,-exported_symbols_list,\"${CMAKE_CURRENT_BINARY_DIR}/${native_export_file}\"")
-  elseif(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+  elseif("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
     # FIXME: `-Wl,-bE:` bypasses whatever handling there is in the build
     # compiler driver to defer to the specified export list.
     set(native_export_file "${export_file}")
@@ -268,7 +268,7 @@ if (NOT DEFINED LLVM_LINKER_DETECTED AND NOT WIN32)
     endif()
   endif()
 
-  if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+  if("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
     include(CheckLinkerFlag)
     # Linkers that support Darwin allow a setting to internalize all symbol 
exports,
     # aiding in reducing binary size and often is applicable for executables.
@@ -315,11 +315,11 @@ function(add_link_opts target_name)
   # linker in a context where the optimizations are not important.
   if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
     if(NOT LLVM_NO_DEAD_STRIP)
-      if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+      if("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
         # ld64's implementation of -dead_strip breaks tools that use plugins.
         set_property(TARGET ${target_name} APPEND_STRING PROPERTY
                      LINK_FLAGS " -Wl,-dead_strip")
-      elseif(${CMAKE_SYSTEM_NAME} MATCHES "SunOS" AND LLVM_LINKER_IS_SOLARISLD)
+      elseif("${CMAKE_SYSTEM_NAME}" MATCHES "SunOS" AND 
LLVM_LINKER_IS_SOLARISLD)
         # Support for ld -z discard-unused=sections was only added in
         # Solaris 11.4.  GNU ld ignores it, but warns every time.
         check_linker_flag(CXX "-Wl,-z,discard-unused=sections" 
LINKER_SUPPORTS_Z_DISCARD_UNUSED)
@@ -333,7 +333,7 @@ function(add_link_opts target_name)
                      LINK_FLAGS " -Wl,--gc-sections")
       endif()
     else() #LLVM_NO_DEAD_STRIP
-      if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+      if("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
         set_property(TARGET ${target_name} APPEND_STRING PROPERTY
                      LINK_FLAGS " -Wl,-bnogc")
       endif()
@@ -345,7 +345,7 @@ function(add_link_opts target_name)
                  LINK_FLAGS " -Wl,-no_warn_duplicate_libraries")
   endif()
 
-  if(ARG_SUPPORT_PLUGINS AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+  if(ARG_SUPPORT_PLUGINS AND "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
     set_property(TARGET ${target_name} APPEND_STRING PROPERTY
                  LINK_FLAGS " -Wl,-brtl")
   endif()
@@ -667,7 +667,7 @@ function(llvm_add_library name)
     # that are used across shared objects which we can't hide.
     if (LLVM_BUILD_LLVM_DYLIB_VIS AND NOT BUILD_SHARED_LIBS AND NOT APPLE AND
         (NOT (WIN32 OR CYGWIN) OR ((MINGW OR CYGWIN) AND CMAKE_CXX_COMPILER_ID 
MATCHES "Clang")) AND
-        NOT (${CMAKE_SYSTEM_NAME} MATCHES "AIX") AND
+        NOT ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX") AND
         NOT DEFINED CMAKE_CXX_VISIBILITY_PRESET)
 
       set_target_properties(${name} PROPERTIES
@@ -1094,7 +1094,7 @@ macro(add_llvm_executable name)
     llvm_update_compile_flags(${name})
   endif()
 
-  if (ARG_SUPPORT_PLUGINS AND NOT ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+  if (ARG_SUPPORT_PLUGINS AND NOT "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
     set(LLVM_NO_DEAD_STRIP On)
   endif()
 
@@ -1417,7 +1417,7 @@ function(export_executable_symbols target)
     # CMake doesn't set CMAKE_EXE_EXPORTS_${lang}_FLAG on Solaris, so
     # ENABLE_EXPORTS has no effect.  While Solaris ld defaults to -rdynamic
     # behaviour, GNU ld needs it.
-    if (APPLE OR ${CMAKE_SYSTEM_NAME} STREQUAL "SunOS")
+    if (APPLE OR "${CMAKE_SYSTEM_NAME}" STREQUAL "SunOS")
       set_property(TARGET ${target} APPEND_STRING PROPERTY
         LINK_FLAGS " -rdynamic")
     endif()
@@ -2540,7 +2540,7 @@ function(llvm_setup_rpath name)
   if (APPLE)
     set(_install_name_dir INSTALL_NAME_DIR "@rpath")
     set(_install_rpath "@loader_path/../lib${LLVM_LIBDIR_SUFFIX}" 
${extra_libdir})
-  elseif(${CMAKE_SYSTEM_NAME} MATCHES "AIX" AND BUILD_SHARED_LIBS)
+  elseif("${CMAKE_SYSTEM_NAME}" MATCHES "AIX" AND BUILD_SHARED_LIBS)
     # $ORIGIN is not interpreted at link time by aix ld.
     # Since BUILD_SHARED_LIBS is only recommended for use by developers,
     # hardcode the rpath to build/install lib dir first in this mode.
@@ -2549,7 +2549,7 @@ function(llvm_setup_rpath name)
   elseif(UNIX)
     set(_build_rpath "\$ORIGIN/../lib${LLVM_LIBDIR_SUFFIX}" ${extra_libdir})
     set(_install_rpath "\$ORIGIN/../lib${LLVM_LIBDIR_SUFFIX}")
-    if(${CMAKE_SYSTEM_NAME} MATCHES "(FreeBSD|DragonFly)")
+    if("${CMAKE_SYSTEM_NAME}" MATCHES "(FreeBSD|DragonFly)")
       set_property(TARGET ${name} APPEND_STRING PROPERTY
                    LINK_FLAGS " -Wl,-z,origin ")
     endif()
@@ -2567,7 +2567,7 @@ function(llvm_setup_rpath name)
   # On AIX, the tool chain doesn't support modifying rpaths/libpaths for XCOFF
   # on install at the moment, so BUILD_WITH_INSTALL_RPATH is required.
   if("${CMAKE_BUILD_RPATH}" STREQUAL "")
-    if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin|AIX")
+    if("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin|AIX")
       set_property(TARGET ${name} PROPERTY BUILD_WITH_INSTALL_RPATH ON)
     else()
       set_property(TARGET ${name} APPEND PROPERTY BUILD_RPATH 
"${_build_rpath}")
diff --git a/llvm/cmake/modules/HandleLLVMOptions.cmake 
b/llvm/cmake/modules/HandleLLVMOptions.cmake
index 91aaeb5a6e3ff..c487f57da3461 100644
--- a/llvm/cmake/modules/HandleLLVMOptions.cmake
+++ b/llvm/cmake/modules/HandleLLVMOptions.cmake
@@ -228,7 +228,7 @@ if(WIN32 OR CYGWIN)
 elseif(FUCHSIA OR UNIX)
   set(LLVM_ON_WIN32 0)
   set(LLVM_ON_UNIX 1)
-  if(APPLE OR ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+  if(APPLE OR "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
     set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
   else()
     set(LLVM_HAVE_LINK_VERSION_SCRIPT 1)
@@ -249,7 +249,7 @@ set(EXEEXT ${CMAKE_EXECUTABLE_SUFFIX})
 set(LTDL_SHLIB_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
 
 # We use *.dylib rather than *.so on darwin, but we stick with *.so on AIX.
-if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   set(LLVM_PLUGIN_EXT ${CMAKE_SHARED_MODULE_SUFFIX})
 else()
   set(LLVM_PLUGIN_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
@@ -260,7 +260,7 @@ if(APPLE)
   set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} 
-Wl,-flat_namespace -Wl,-undefined -Wl,dynamic_lookup")
 endif()
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
   # RHEL7 has ar and ranlib being non-deterministic by default. The D flag 
forces determinism,
   # however only GNU version of ar and ranlib (2.27) have this option.
   # RHEL DTS7 is also affected by this, which uses GNU binutils 2.28
@@ -292,7 +292,7 @@ if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
   endif()
 endif()
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   # -fPIC does not enable the large code model for GCC on AIX but does for XL.
   if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
     append("-mcmodel=large" CMAKE_CXX_FLAGS CMAKE_C_FLAGS)
@@ -328,7 +328,7 @@ endif()
 # by dlclose(). We need that since the CLI API relies on cross-references
 # between global objects which became horribly broken when one of the libraries
 # is unloaded.
-if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
   set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-z,nodelete")
   set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-z,nodelete")
 endif()
@@ -454,13 +454,13 @@ if( LLVM_ENABLE_PIC )
   # to SEGV (GCC PR target/96607).
   # clang with -O3 -fPIC generates code that SEGVs.
   # Both can be worked around by compiling with -O instead.
-  if(${CMAKE_SYSTEM_NAME} STREQUAL "SunOS" AND LLVM_NATIVE_ARCH STREQUAL 
"Sparc")
+  if("${CMAKE_SYSTEM_NAME}" STREQUAL "SunOS" AND LLVM_NATIVE_ARCH STREQUAL 
"Sparc")
     llvm_replace_compiler_option(CMAKE_CXX_FLAGS_RELEASE "-O[23]" "-O")
     llvm_replace_compiler_option(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O[23]" "-O")
   endif()
 endif()
 
-if((NOT (${CMAKE_SYSTEM_NAME} MATCHES "AIX")) AND
+if((NOT ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")) AND
    (NOT (WIN32 OR CYGWIN) OR ((MINGW OR CYGWIN) AND CMAKE_CXX_COMPILER_ID 
MATCHES "Clang")))
   # GCC for MinGW does nothing about -fvisibility-inlines-hidden, but warns
   # about use of the attributes. As long as we don't use the attributes (to
@@ -708,7 +708,7 @@ endif ()
 if ( LLVM_COMPILER_IS_GCC_COMPATIBLE AND LLVM_ENABLE_MODULES )
   set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
   set(module_flags "-fmodules 
-fmodules-cache-path=${PROJECT_BINARY_DIR}/module.cache")
-  if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+  if ("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
     # On Darwin -fmodules does not imply -fcxx-modules.
     set(module_flags "${module_flags} -fcxx-modules")
   endif()
@@ -1123,7 +1123,7 @@ endif()
 # But MinSizeRel seems to add that automatically, so maybe disable these
 # flags instead if LLVM_NO_DEAD_STRIP is set.
 if(NOT CYGWIN AND NOT MSVC)
-  if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND
+  if(NOT "${CMAKE_SYSTEM_NAME}" MATCHES "Darwin" AND
      NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
     if (CMAKE_CXX_COMPILER_ID MATCHES "XL")
       append("-qfuncsect" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
@@ -1315,9 +1315,14 @@ endif()
 # linking (due to incompatibility). With MSVC, note that the plugin has to
 # explicitly link against (exactly one) tool so we can't unilaterally turn on
 # LLVM_ENABLE_PLUGINS when it's enabled.
+if("${CMAKE_SYSTEM_NAME}" MATCHES AIX)
+  set(LLVM_EXPORT_SYMBOLS_FOR_PLUGINS_OPTION OFF)
+else()
+  set(LLVM_EXPORT_SYMBOLS_FOR_PLUGINS_OPTION ON)
+endif()
 CMAKE_DEPENDENT_OPTION(LLVM_EXPORT_SYMBOLS_FOR_PLUGINS
        "Export symbols from LLVM tools so that plugins can import them" OFF
-       "NOT ${CMAKE_SYSTEM_NAME} MATCHES AIX" 
${LLVM_EXPORT_SYMBOLS_FOR_PLUGINS_AIX_default})
+       "LLVM_EXPORT_SYMBOLS_FOR_PLUGINS_OPTION" 
${LLVM_EXPORT_SYMBOLS_FOR_PLUGINS_AIX_default})
 if(BUILD_SHARED_LIBS AND LLVM_EXPORT_SYMBOLS_FOR_PLUGINS)
   message(FATAL_ERROR "BUILD_SHARED_LIBS not compatible with 
LLVM_EXPORT_SYMBOLS_FOR_PLUGINS")
 endif()
diff --git a/llvm/lib/Target/CMakeLists.txt b/llvm/lib/Target/CMakeLists.txt
index e26e00ea3fdfd..bcc13f942bf96 100644
--- a/llvm/lib/Target/CMakeLists.txt
+++ b/llvm/lib/Target/CMakeLists.txt
@@ -24,7 +24,7 @@ add_llvm_component_library(LLVMTarget
 # that are used across shared objects which we can't hide.
 if (NOT BUILD_SHARED_LIBS AND NOT APPLE AND
     (NOT (WIN32 OR CYGWIN) OR ((MINGW OR CYGWIN) AND CMAKE_CXX_COMPILER_ID 
MATCHES "Clang")) AND
-    NOT (${CMAKE_SYSTEM_NAME} MATCHES "AIX") AND
+    NOT ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX") AND
     NOT DEFINED CMAKE_CXX_VISIBILITY_PRESET)
   # Set default visibility to hidden, so we don't export all the Target classes
   # in libLLVM.so.
diff --git a/llvm/lib/TargetParser/CMakeLists.txt 
b/llvm/lib/TargetParser/CMakeLists.txt
index 62e97bfebe099..5eecfbf80b2f7 100644
--- a/llvm/lib/TargetParser/CMakeLists.txt
+++ b/llvm/lib/TargetParser/CMakeLists.txt
@@ -9,7 +9,7 @@ if (HAS_WERROR_GLOBAL_CTORS AND NOT 
LLVM_HAS_NOGLOBAL_CTOR_MUTEX)
 endif()
 
 # Solaris code uses kstat, so specify dependency explicitly for shared builds.
-if (${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+if ("${CMAKE_SYSTEM_NAME}" MATCHES "SunOS")
   set(system_libs kstat)
 endif()
 
diff --git a/llvm/tools/llvm-jitlink/CMakeLists.txt 
b/llvm/tools/llvm-jitlink/CMakeLists.txt
index e337fe5f99865..19e3edaf63d86 100644
--- a/llvm/tools/llvm-jitlink/CMakeLists.txt
+++ b/llvm/tools/llvm-jitlink/CMakeLists.txt
@@ -30,10 +30,10 @@ add_llvm_tool(llvm-jitlink
   EXPORT_SYMBOLS
   )
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "Haiku")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "Haiku")
   target_link_libraries(llvm-jitlink PRIVATE network)
 endif()
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "SunOS")
   target_link_libraries(llvm-jitlink PRIVATE socket)
 endif()
diff --git a/llvm/unittests/Support/DynamicLibrary/CMakeLists.txt 
b/llvm/unittests/Support/DynamicLibrary/CMakeLists.txt
index 2366209c25aee..98b7f2d19ee46 100644
--- a/llvm/unittests/Support/DynamicLibrary/CMakeLists.txt
+++ b/llvm/unittests/Support/DynamicLibrary/CMakeLists.txt
@@ -16,7 +16,7 @@ set_output_directory(DynamicLibraryLib
   )
 
 # FIXME: Find out why AIX fails with new DynamicLibrary symbols behavior.
-if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   add_llvm_unittest(DynamicLibraryTests
     DynamicLibraryTest.cpp
     )
@@ -28,7 +28,7 @@ else()
     )
 endif()
 target_link_libraries(DynamicLibraryTests PRIVATE DynamicLibraryLib)
-if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   export_executable_symbols(DynamicLibraryTests)
 endif()
 
@@ -64,7 +64,7 @@ endfunction(dynlib_add_module)
 
 # Revert -Wl,-z,nodelete on this test since it relies on the file
 # being unloaded.
-if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
   string(REPLACE "-Wl,-z,nodelete" "" CMAKE_MODULE_LINKER_FLAGS
     ${CMAKE_MODULE_LINKER_FLAGS})
 endif()
diff --git a/mlir/cmake/modules/FindSyclRuntime.cmake 
b/mlir/cmake/modules/FindSyclRuntime.cmake
index 9e6ae04025848..5986895cb1628 100644
--- a/mlir/cmake/modules/FindSyclRuntime.cmake
+++ b/mlir/cmake/modules/FindSyclRuntime.cmake
@@ -19,7 +19,7 @@ if(NOT DEFINED ENV{CMPLR_ROOT})
 else()
     get_filename_component(ONEAPI_VER "$ENV{CMPLR_ROOT}" NAME)
     if(ONEAPI_VER VERSION_LESS 2024.0)
-        if(LINUX OR (${CMAKE_SYSTEM_NAME} MATCHES "Linux"))
+        if(LINUX OR ("${CMAKE_SYSTEM_NAME}" MATCHES "Linux"))
             set(SyclRuntime_ROOT "$ENV{CMPLR_ROOT}/linux")
         elseif(WIN32)
             set(SyclRuntime_ROOT "$ENV{CMPLR_ROOT}/windows")
diff --git a/offload/cmake/OpenMPTesting.cmake 
b/offload/cmake/OpenMPTesting.cmake
index 8e955ff399275..ef8cf34ba0c85 100644
--- a/offload/cmake/OpenMPTesting.cmake
+++ b/offload/cmake/OpenMPTesting.cmake
@@ -57,7 +57,7 @@ if (${OPENMP_STANDALONE_BUILD})
   if (MSVC OR XCODE)
     set(DEFAULT_LIT_ARGS "${DEFAULT_LIT_ARGS} --no-progress-bar")
   endif()
-  if (${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+  if ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
     set(DEFAULT_LIT_ARGS "${DEFAULT_LIT_ARGS} --time-tests --timeout=1800")
   endif()
   set(OPENMP_LIT_ARGS "${DEFAULT_LIT_ARGS}" CACHE STRING "Options for lit.")
diff --git a/openmp/CMakeLists.txt b/openmp/CMakeLists.txt
index edd79df7fb767..beaba1d122efb 100644
--- a/openmp/CMakeLists.txt
+++ b/openmp/CMakeLists.txt
@@ -117,7 +117,7 @@ set(ENABLE_LIBOMPTARGET ON)
 # there is no point in trying to compile libomptarget on other OSes.
 # 32-bit systems are not supported either.
 if (APPLE OR WIN32 OR WASM OR NOT "cxx_std_17" IN_LIST 
CMAKE_CXX_COMPILE_FEATURES
-    OR NOT CMAKE_SIZEOF_VOID_P EQUAL 8 OR ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+    OR NOT CMAKE_SIZEOF_VOID_P EQUAL 8 OR "${CMAKE_SYSTEM_NAME}"MATCHES "AIX")
   set(ENABLE_LIBOMPTARGET OFF)
 endif()
 
diff --git a/openmp/cmake/OpenMPTesting.cmake b/openmp/cmake/OpenMPTesting.cmake
index 14cc5c67d84c2..85240aede728d 100644
--- a/openmp/cmake/OpenMPTesting.cmake
+++ b/openmp/cmake/OpenMPTesting.cmake
@@ -57,7 +57,7 @@ if (${OPENMP_STANDALONE_BUILD})
   if (MSVC OR XCODE)
     set(DEFAULT_LIT_ARGS "${DEFAULT_LIT_ARGS} --no-progress-bar")
   endif()
-  if (${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+  if ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
     set(DEFAULT_LIT_ARGS "${DEFAULT_LIT_ARGS} --time-tests --timeout=3000")
   endif()
   set(OPENMP_LIT_ARGS "${DEFAULT_LIT_ARGS}" CACHE STRING "Options for lit.")
diff --git a/openmp/runtime/CMakeLists.txt b/openmp/runtime/CMakeLists.txt
index b6c4759ec03f7..93eb14f10a50a 100644
--- a/openmp/runtime/CMakeLists.txt
+++ b/openmp/runtime/CMakeLists.txt
@@ -136,7 +136,7 @@ set(LIBOMP_ASMFLAGS "" CACHE STRING
   "Appended user specified assembler flags.")
 set(LIBOMP_LDFLAGS "" CACHE STRING
   "Appended user specified linker flags.")
-if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   set(LIBOMP_LIBFLAGS "-lperfstat" CACHE STRING
     "Appended user specified linked libs flags. (e.g., -lm)")
   if("${LIBOMP_ARCH}" STREQUAL "ppc")
diff --git a/openmp/runtime/cmake/LibompHandleFlags.cmake 
b/openmp/runtime/cmake/LibompHandleFlags.cmake
index 61fc31d0fc7fd..c36a88fb862ae 100644
--- a/openmp/runtime/cmake/LibompHandleFlags.cmake
+++ b/openmp/runtime/cmake/LibompHandleFlags.cmake
@@ -140,14 +140,14 @@ function(libomp_get_libflags libflags)
   if(LIBOMP_HAVE_SHM_OPEN_WITH_LRT)
     libomp_append(libflags_local -lrt)
   endif()
-  if(${CMAKE_SYSTEM_NAME} MATCHES "DragonFly|FreeBSD|OpenBSD")
+  if("${CMAKE_SYSTEM_NAME}" MATCHES "DragonFly|FreeBSD|OpenBSD")
     libomp_append(libflags_local "-Wl,--no-as-needed" 
LIBOMP_HAVE_AS_NEEDED_FLAG)
     libomp_append(libflags_local "-lm")
     libomp_append(libflags_local "-Wl,--as-needed" LIBOMP_HAVE_AS_NEEDED_FLAG)
-    if (${CMAKE_SYSTEM_NAME} STREQUAL "DragonFly")
+    if ("${CMAKE_SYSTEM_NAME}" STREQUAL "DragonFly")
       libomp_append(libflags_local "-lkvm")
     endif()
-  elseif(${CMAKE_SYSTEM_NAME} MATCHES "Linux|NetBSD|SunOS")
+  elseif("${CMAKE_SYSTEM_NAME}" MATCHES "Linux|NetBSD|SunOS")
     libomp_append(libflags_local -lm)
   endif()
   set(libflags_local ${libflags_local} ${LIBOMP_LIBFLAGS})
diff --git a/openmp/runtime/src/CMakeLists.txt 
b/openmp/runtime/src/CMakeLists.txt
index 569061c6494b8..08e1753b93636 100644
--- a/openmp/runtime/src/CMakeLists.txt
+++ b/openmp/runtime/src/CMakeLists.txt
@@ -121,7 +121,7 @@ else()
     # Unix specific files
     libomp_append(LIBOMP_CXXFILES z_Linux_util.cpp)
     libomp_append(LIBOMP_CXXFILES kmp_gsupport.cpp)
-    if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+    if("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
       libomp_append(LIBOMP_GNUASMFILES z_AIX_asm.S) # AIX assembly file
     else()
       libomp_append(LIBOMP_GNUASMFILES z_Linux_asm.S) # Unix assembly file
@@ -218,7 +218,7 @@ if(OPENMP_MSVC_NAME_SCHEME)
     LINK_FLAGS "${LIBOMP_CONFIGURED_LDFLAGS}"
     LINKER_LANGUAGE ${LIBOMP_LINKER_LANGUAGE}
  )
-elseif(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+elseif("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   set(LIBOMP_SHARED_OUTPUT_NAME "omp" CACHE STRING "Output name for the shared 
libomp runtime library.")
   set_target_properties(omp PROPERTIES
     OUTPUT_NAME "${LIBOMP_SHARED_OUTPUT_NAME}"
diff --git a/third-party/benchmark/src/CMakeLists.txt 
b/third-party/benchmark/src/CMakeLists.txt
index 943594b70bcd0..0357dcce3f831 100644
--- a/third-party/benchmark/src/CMakeLists.txt
+++ b/third-party/benchmark/src/CMakeLists.txt
@@ -57,12 +57,12 @@ endif(HAVE_LIB_RT)
 
 
 # We need extra libraries on Windows
-if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "Windows")
   target_link_libraries(benchmark PRIVATE shlwapi)
 endif()
 
 # We need extra libraries on Solaris
-if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "SunOS")
   target_link_libraries(benchmark PRIVATE kstat)
 endif()
 
diff --git a/third-party/unittest/CMakeLists.txt 
b/third-party/unittest/CMakeLists.txt
index b9f3593320d77..3fa885a16ea1e 100644
--- a/third-party/unittest/CMakeLists.txt
+++ b/third-party/unittest/CMakeLists.txt
@@ -16,7 +16,7 @@ if(WIN32)
 endif()
 
 # Google Test requires headers which need _ALL_SOURCE to build on AIX
-if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   remove_definitions("-D_XOPEN_SOURCE=700")
   add_definitions("-D_ALL_SOURCE")
 endif()

>From 2434965d7dcf1fee8eac88a8599086901a1be94e Mon Sep 17 00:00:00 2001
From: David Tenty <daltenty....@gmail.com>
Date: Wed, 20 Aug 2025 10:40:51 -0400
Subject: [PATCH 2/4] Update openmp/CMakeLists.txt

Co-authored-by: Hubert Tong <hubert.reinterpretc...@gmail.com>
---
 openmp/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/openmp/CMakeLists.txt b/openmp/CMakeLists.txt
index beaba1d122efb..f3de4bc4ee87b 100644
--- a/openmp/CMakeLists.txt
+++ b/openmp/CMakeLists.txt
@@ -117,7 +117,7 @@ set(ENABLE_LIBOMPTARGET ON)
 # there is no point in trying to compile libomptarget on other OSes.
 # 32-bit systems are not supported either.
 if (APPLE OR WIN32 OR WASM OR NOT "cxx_std_17" IN_LIST 
CMAKE_CXX_COMPILE_FEATURES
-    OR NOT CMAKE_SIZEOF_VOID_P EQUAL 8 OR "${CMAKE_SYSTEM_NAME}"MATCHES "AIX")
+    OR NOT CMAKE_SIZEOF_VOID_P EQUAL 8 OR "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   set(ENABLE_LIBOMPTARGET OFF)
 endif()
 

>From 8d0c787337a3aafa82ae3a38478ff735dbbcf18b Mon Sep 17 00:00:00 2001
From: David Tenty <dalte...@ibm.com>
Date: Wed, 20 Aug 2025 12:03:08 -0400
Subject: [PATCH 3/4] Add cases I missed initially

---
 clang-tools-extra/clangd/CMakeLists.txt            |  4 ++--
 clang/bindings/python/tests/CMakeLists.txt         |  2 +-
 clang/tools/libclang/CMakeLists.txt                |  6 +++---
 compiler-rt/cmake/config-ix.cmake                  |  2 +-
 compiler-rt/lib/asan/CMakeLists.txt                |  4 ++--
 libcxx/CMakeLists.txt                              |  4 ++--
 libcxxabi/CMakeLists.txt                           |  4 ++--
 libcxxabi/src/CMakeLists.txt                       |  2 +-
 libunwind/src/CMakeLists.txt                       |  2 +-
 lldb/source/Host/CMakeLists.txt                    |  2 +-
 .../Plugins/Process/FreeBSDKernel/CMakeLists.txt   |  2 +-
 lldb/tools/driver/CMakeLists.txt                   |  2 +-
 llvm/CMakeLists.txt                                | 14 +++++++-------
 llvm/cmake/config-ix.cmake                         |  8 ++++----
 llvm/lib/Support/CMakeLists.txt                    |  4 ++--
 openmp/runtime/cmake/config-ix.cmake               |  2 +-
 16 files changed, 32 insertions(+), 32 deletions(-)

diff --git a/clang-tools-extra/clangd/CMakeLists.txt 
b/clang-tools-extra/clangd/CMakeLists.txt
index 06920a97ddc88..fb3f05329be21 100644
--- a/clang-tools-extra/clangd/CMakeLists.txt
+++ b/clang-tools-extra/clangd/CMakeLists.txt
@@ -6,7 +6,7 @@ add_subdirectory(support)
 
 # Configure the Features.inc file.
 if (NOT DEFINED CLANGD_BUILD_XPC)
-  if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+  if("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
     set(CLANGD_BUILD_XPC_DEFAULT ON)
   else ()
     set(CLANGD_BUILD_XPC_DEFAULT OFF)
@@ -193,7 +193,7 @@ if(CLANGD_TIDY_CHECKS)
 endif()
 
 add_subdirectory(refactor/tweaks)
-if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
+if ("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
   # FIXME: Make fuzzer not use linux-specific APIs, build it everywhere.
   add_subdirectory(fuzzer)
 endif()
diff --git a/clang/bindings/python/tests/CMakeLists.txt 
b/clang/bindings/python/tests/CMakeLists.txt
index a0ddabc21bb41..d9a6bbf452bd6 100644
--- a/clang/bindings/python/tests/CMakeLists.txt
+++ b/clang/bindings/python/tests/CMakeLists.txt
@@ -35,7 +35,7 @@ if(WIN32)
 endif()
 
 # The Python FFI interface is broken on AIX: 
https://bugs.python.org/issue38628.
-if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   set(RUN_PYTHON_TESTS FALSE)
 endif()
 
diff --git a/clang/tools/libclang/CMakeLists.txt 
b/clang/tools/libclang/CMakeLists.txt
index 2b1e266f07392..e0ff7605b68b8 100644
--- a/clang/tools/libclang/CMakeLists.txt
+++ b/clang/tools/libclang/CMakeLists.txt
@@ -93,7 +93,7 @@ if(MSVC)
   set(LLVM_EXPORTED_SYMBOL_FILE)
 endif()
 
-if (UNIX AND NOT APPLE AND NOT ${CMAKE_SYSTEM_NAME} MATCHES "AIX" AND NOT 
CYGWIN)
+if (UNIX AND NOT APPLE AND NOT "${CMAKE_SYSTEM_NAME}" MATCHES "AIX" AND NOT 
CYGWIN)
   set(LLVM_EXPORTED_SYMBOL_FILE)
   set(USE_VERSION_SCRIPT ${LLVM_HAVE_LINK_VERSION_SCRIPT})
 endif()
@@ -125,7 +125,7 @@ else()
   set(output_name "clang")
 endif()
 
-if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
     set(CMAKE_AIX_EXPORT_ALL_SYMBOLS OFF)
     # libclang requires headers which need _ALL_SOURCE to build on AIX
     remove_definitions("-D_XOPEN_SOURCE=700")
@@ -186,7 +186,7 @@ if(ENABLE_SHARED)
     endif()
   endif()
   if (USE_VERSION_SCRIPT)
-    if (${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+    if ("${CMAKE_SYSTEM_NAME}" MATCHES "SunOS")
       include(CheckLinkerFlag)
       # The Solaris 11.4 linker supports a subset of GNU ld version scripts,
       # but requires a special option to enable it.
diff --git a/compiler-rt/cmake/config-ix.cmake 
b/compiler-rt/cmake/config-ix.cmake
index e3310b1ff0e2c..67db4383ec3dc 100644
--- a/compiler-rt/cmake/config-ix.cmake
+++ b/compiler-rt/cmake/config-ix.cmake
@@ -204,7 +204,7 @@ check_library_exists(stdc++ __cxa_throw "" 
COMPILER_RT_HAS_LIBSTDCXX)
 llvm_check_compiler_linker_flag(C "-Wl,-z,text" COMPILER_RT_HAS_Z_TEXT)
 llvm_check_compiler_linker_flag(C "-fuse-ld=lld" 
COMPILER_RT_HAS_FUSE_LD_LLD_FLAG)
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS" AND LLVM_LINKER_IS_SOLARISLD)
+if("${CMAKE_SYSTEM_NAME}" MATCHES "SunOS" AND LLVM_LINKER_IS_SOLARISLD)
   set(VERS_COMPAT_OPTION "-Wl,-z,gnu-version-script-compat")
   llvm_check_compiler_linker_flag(C "${VERS_COMPAT_OPTION}" 
COMPILER_RT_HAS_GNU_VERSION_SCRIPT_COMPAT)
 endif()
diff --git a/compiler-rt/lib/asan/CMakeLists.txt 
b/compiler-rt/lib/asan/CMakeLists.txt
index 97cc5c85703e1..d1d229e3e6d40 100644
--- a/compiler-rt/lib/asan/CMakeLists.txt
+++ b/compiler-rt/lib/asan/CMakeLists.txt
@@ -282,7 +282,7 @@ else()
   endif()
 
   # On AIX, we only need the static libraries.
-  if (NOT ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+  if (NOT "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   foreach(arch ${ASAN_SUPPORTED_ARCH})
     if (COMPILER_RT_HAS_VERSION_SCRIPT)
       if(WIN32)
@@ -392,7 +392,7 @@ add_compiler_rt_resource_file(asan_ignorelist 
asan_ignorelist.txt asan)
 # On AIX, static sanitizer libraries are not added to the DSO, so we need to 
put 
 # asan.link_with_main_exec.txt and asan_cxx.link_with_main_exec.txt to the 
build
 # and install dir for use in resolving undefined sanitizer symbols at runtime.
-if (${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   foreach(arch ${ASAN_SUPPORTED_ARCH})
     add_compiler_rt_cfg(asan_symbols_${arch} asan.link_with_main_exec.txt asan 
${arch})
     add_compiler_rt_cfg(asan_cxx_symbols_${arch} 
asan_cxx.link_with_main_exec.txt asan ${arch})
diff --git a/libcxx/CMakeLists.txt b/libcxx/CMakeLists.txt
index 85514cc7547a9..8f653efa59665 100644
--- a/libcxx/CMakeLists.txt
+++ b/libcxx/CMakeLists.txt
@@ -113,7 +113,7 @@ option(LIBCXX_ENABLE_MONOTONIC_CLOCK
 #
 # TODO TZDB make the default always ON when most platforms ship with the IANA
 # database.
-if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
   set(ENABLE_TIME_ZONE_DATABASE_DEFAULT ON)
 else()
   set(ENABLE_TIME_ZONE_DATABASE_DEFAULT OFF)
@@ -466,7 +466,7 @@ include(HandleLibcxxFlags)
 # 'config-ix' use them during feature checks. It also adds them to both
 # 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'
 
-if (${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   add_flags_if_supported("-mdefault-visibility-export-mapping=explicit")
   set(CMAKE_AIX_EXPORT_ALL_SYMBOLS OFF)
 endif()
diff --git a/libcxxabi/CMakeLists.txt b/libcxxabi/CMakeLists.txt
index cf478bcee01fa..3dabd87b9c587 100644
--- a/libcxxabi/CMakeLists.txt
+++ b/libcxxabi/CMakeLists.txt
@@ -244,7 +244,7 @@ include(HandleLibcxxabiFlags)
 
#===============================================================================
 
 # Configure target flags
-if (${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   add_flags_if_supported("-mdefault-visibility-export-mapping=explicit")
   set(CMAKE_AIX_EXPORT_ALL_SYMBOLS OFF)
 endif()
@@ -458,7 +458,7 @@ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${LIBCXXABI_C_FLAGS}")
 
 # On AIX, avoid picking up VMX extensions(i.e. vec_malloc) which would change
 # the default alignment of the allocators here.
-if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   add_definitions("-D_XOPEN_SOURCE=700")
 endif()
 
diff --git a/libcxxabi/src/CMakeLists.txt b/libcxxabi/src/CMakeLists.txt
index 0675577aed6a1..38a54b16278a7 100644
--- a/libcxxabi/src/CMakeLists.txt
+++ b/libcxxabi/src/CMakeLists.txt
@@ -37,7 +37,7 @@ else()
 endif()
 
 if (LIBCXXABI_ENABLE_THREADS AND (UNIX OR FUCHSIA) AND NOT (APPLE OR CYGWIN)
-    AND NOT (${CMAKE_SYSTEM_NAME} MATCHES "AIX"))
+    AND NOT ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX"))
   list(APPEND LIBCXXABI_SOURCES
     cxa_thread_atexit.cpp
   )
diff --git a/libunwind/src/CMakeLists.txt b/libunwind/src/CMakeLists.txt
index 71663a22cdf41..514c2fcd5bf4e 100644
--- a/libunwind/src/CMakeLists.txt
+++ b/libunwind/src/CMakeLists.txt
@@ -6,7 +6,7 @@ set(LIBUNWIND_CXX_SOURCES
     Unwind-seh.cpp
     )
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   list(APPEND LIBUNWIND_CXX_SOURCES
     Unwind_AIXExtras.cpp
     )
diff --git a/lldb/source/Host/CMakeLists.txt b/lldb/source/Host/CMakeLists.txt
index b15d72e61b6e5..c9e8afe48fcde 100644
--- a/lldb/source/Host/CMakeLists.txt
+++ b/lldb/source/Host/CMakeLists.txt
@@ -7,7 +7,7 @@ if (APPLE AND LLVM_ENABLE_LOCAL_SUBMODULE_VISIBILITY)
   endif()
 endif()
 
-if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   add_definitions("-D_ALL_SOURCE")
 endif()
 
diff --git a/lldb/source/Plugins/Process/FreeBSDKernel/CMakeLists.txt 
b/lldb/source/Plugins/Process/FreeBSDKernel/CMakeLists.txt
index b0d1370286a8c..c35b4def24e25 100644
--- a/lldb/source/Plugins/Process/FreeBSDKernel/CMakeLists.txt
+++ b/lldb/source/Plugins/Process/FreeBSDKernel/CMakeLists.txt
@@ -2,7 +2,7 @@ set(FBSDKERNEL_LIBS)
 if(FBSDVMCore_FOUND)
   list(APPEND FBSDKERNEL_LIBS fbsdvmcore)
 endif()
-if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "FreeBSD")
   list(APPEND FBSDKERNEL_LIBS kvm)
 endif()
 
diff --git a/lldb/tools/driver/CMakeLists.txt b/lldb/tools/driver/CMakeLists.txt
index 5c0cac484cc94..446bf68d09622 100644
--- a/lldb/tools/driver/CMakeLists.txt
+++ b/lldb/tools/driver/CMakeLists.txt
@@ -11,7 +11,7 @@ if(APPLE)
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} 
-Wl,-sectcreate,__TEXT,__info_plist,${CMAKE_CURRENT_BINARY_DIR}/lldb-Info.plist")
 endif()
 
-if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")                               
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   remove_definitions("-D_XOPEN_SOURCE=700")                                    
   add_definitions("-D_ALL_SOURCE")                                             
 endif()
diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index 565f5caa561fd..970eb7be8af8f 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -110,7 +110,7 @@ endif()
 # one for llvm+clang+... using the same sources.
 # These projects will be included when "all" is included in 
LLVM_ENABLE_PROJECTS.
 set(LLVM_ALL_PROJECTS 
"bolt;clang;clang-tools-extra;compiler-rt;cross-project-tests;libclc;lld;lldb;mlir;openmp;polly")
-if (${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   # Disallow 'openmp' as a LLVM PROJECT on AIX as the supported way is to use
   # LLVM_ENABLE_RUNTIMES.
   list(REMOVE_ITEM LLVM_ALL_PROJECTS openmp)
@@ -682,7 +682,7 @@ if (NOT CMAKE_SYSTEM_NAME MATCHES "OS390")
   option(LLVM_ENABLE_PIC "Build Position-Independent Code" ON)
 endif()
 option(LLVM_ENABLE_MODULES "Compile with C++ modules enabled." OFF)
-if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+if("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
   option(LLVM_ENABLE_MODULE_DEBUGGING "Compile with -gmodules." ON)
 else()
   option(LLVM_ENABLE_MODULE_DEBUGGING "Compile with -gmodules." OFF)
@@ -786,7 +786,7 @@ option(LLVM_USE_SPLIT_DWARF
 
 # Define an option controlling whether we should build for 32-bit on 64-bit
 # platforms, where supported.
-if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT (WIN32 OR ${CMAKE_SYSTEM_NAME} MATCHES 
"AIX"))
+if( CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT (WIN32 OR "${CMAKE_SYSTEM_NAME}" 
MATCHES "AIX"))
   # TODO: support other platforms and toolchains.
   option(LLVM_BUILD_32_BITS "Build 32 bits executables and libraries." OFF)
 endif()
@@ -1256,7 +1256,7 @@ 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 ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
           add_compile_definitions(_XOPEN_SOURCE=700)
           add_compile_definitions(_LARGE_FILE_API)
           add_compile_options(-pthread)
@@ -1284,7 +1284,7 @@ if (CMAKE_SYSTEM_NAME MATCHES "OS390")
 endif()
 
 # Build with _FILE_OFFSET_BITS=64 on Solaris to match g++ >= 9.
-if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "SunOS")
           add_compile_definitions(_FILE_OFFSET_BITS=64)
 endif()
 
@@ -1302,10 +1302,10 @@ if(LLVM_TARGET_IS_CROSSCOMPILE_HOST)
 # (this is a variable that CrossCompile sets on recursive invocations)
 endif()
 
-if( ${CMAKE_SYSTEM_NAME} MATCHES SunOS )
+if( "${CMAKE_SYSTEM_NAME}" MATCHES SunOS )
    # special hack for Solaris to handle crazy system sys/regset.h
    include_directories("${LLVM_MAIN_INCLUDE_DIR}/llvm/Support/Solaris")
-endif( ${CMAKE_SYSTEM_NAME} MATCHES SunOS )
+endif( "${CMAKE_SYSTEM_NAME}" MATCHES SunOS )
 
 # Make sure we don't get -rdynamic in every binary. For those that need it,
 # use EXPORT_SYMBOLS argument.
diff --git a/llvm/cmake/config-ix.cmake b/llvm/cmake/config-ix.cmake
index a8e4e5a63244d..ed2bfa6df68f4 100644
--- a/llvm/cmake/config-ix.cmake
+++ b/llvm/cmake/config-ix.cmake
@@ -69,14 +69,14 @@ endif()
 
 # Do checks with _XOPEN_SOURCE and large-file API on AIX, because we will build
 # with those too.
-if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
           list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D_XOPEN_SOURCE=700")
           list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D_LARGE_FILE_API")
 endif()
 
 # Do checks with _FILE_OFFSET_BITS=64 on Solaris, because we will build
 # with those too.
-if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "SunOS")
           list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D_FILE_OFFSET_BITS=64")
 endif()
 
@@ -122,7 +122,7 @@ if(APPLE)
     HAVE_CRASHREPORTER_INFO)
 endif()
 
-if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
+if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
   check_include_file(linux/magic.h HAVE_LINUX_MAGIC_H)
   if(NOT HAVE_LINUX_MAGIC_H)
     # older kernels use split files
@@ -411,7 +411,7 @@ endif()
 
 CHECK_STRUCT_HAS_MEMBER("struct stat" st_mtimespec.tv_nsec
     "sys/types.h;sys/stat.h" HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
-if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
 # The st_mtim.tv_nsec member of a `stat` structure is not reliable on some AIX
 # environments.
   set(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC 0)
diff --git a/llvm/lib/Support/CMakeLists.txt b/llvm/lib/Support/CMakeLists.txt
index b7578dd580072..6646af6db5d3c 100644
--- a/llvm/lib/Support/CMakeLists.txt
+++ b/llvm/lib/Support/CMakeLists.txt
@@ -62,7 +62,7 @@ elseif( CMAKE_HOST_UNIX )
   if( UNIX AND NOT (BEOS OR HAIKU) )
     set(system_libs ${system_libs} m)
   endif()
-  if( UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "SunOS" )
+  if( UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "SunOS" )
     set(system_libs ${system_libs} kstat socket)
   endif()
   if( FUCHSIA )
@@ -130,7 +130,7 @@ endif()
 # unistd.h and it is guarded by _ALL_SOURCE, so we remove the _XOPEN_SOURCE
 # guard here. We should remove the guards all together once AIX cleans up
 # the system headers.
-if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+if (UNIX AND "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
   remove_definitions("-D_XOPEN_SOURCE=700")
 endif()
 
diff --git a/openmp/runtime/cmake/config-ix.cmake 
b/openmp/runtime/cmake/config-ix.cmake
index 144c657be67e8..30b69d46a8bd1 100644
--- a/openmp/runtime/cmake/config-ix.cmake
+++ b/openmp/runtime/cmake/config-ix.cmake
@@ -321,7 +321,7 @@ else()
       (LIBOMP_ARCH STREQUAL sparcv9))
      AND # OS supported?
      ((WIN32 AND LIBOMP_HAVE_PSAPI) OR APPLE OR
-      (NOT (WIN32 OR ${CMAKE_SYSTEM_NAME} MATCHES "AIX") AND 
LIBOMP_HAVE_WEAK_ATTRIBUTE)))
+      (NOT (WIN32 OR "${CMAKE_SYSTEM_NAME}" MATCHES "AIX") AND 
LIBOMP_HAVE_WEAK_ATTRIBUTE)))
     set(LIBOMP_HAVE_OMPT_SUPPORT TRUE)
   else()
     set(LIBOMP_HAVE_OMPT_SUPPORT FALSE)

>From 810bf83fb2ce05910ae739f13a1d7ba40a299662 Mon Sep 17 00:00:00 2001
From: David Tenty <dalte...@ibm.com>
Date: Wed, 20 Aug 2025 12:10:45 -0400
Subject: [PATCH 4/4] Add one more case

---
 libcxx/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libcxx/CMakeLists.txt b/libcxx/CMakeLists.txt
index 8f653efa59665..5162963bafd63 100644
--- a/libcxx/CMakeLists.txt
+++ b/libcxx/CMakeLists.txt
@@ -159,7 +159,7 @@ set(LIBCXX_TEST_PARAMS "" CACHE STRING
     "A list of parameters to run the Lit test suite with.")
 
 # TODO: Figure out how to build GoogleBenchmark on those platforms, and how to 
build when exceptions or RTTI is disabled
-if (WIN32 OR MINGW OR ANDROID OR ${CMAKE_SYSTEM_NAME} MATCHES "AIX"
+if (WIN32 OR MINGW OR ANDROID OR "${CMAKE_SYSTEM_NAME}" MATCHES "AIX"
     OR NOT LIBCXX_ENABLE_LOCALIZATION
     OR NOT LIBCXX_ENABLE_THREADS
     OR NOT LIBCXX_ENABLE_FILESYSTEM

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