commit 79622d4a3eece8e95c31525e1485274d4adaefe1
author Nicole Rabjohn <Nicole.Rabjohn@ibm.com> Wed Mar 22 11:59:06 2023 -0400
committer Brad King <brad.king@kitware.com> Thu Mar 23 11:46:17 2023 -0400
tree a5ea72b9ee900526923fa19a726178d4ff4324ff
parent b69441c796827f28742e2b0a4a611c55c7d0ce45

IBMClang: No thin LTO on AIX

AIX does not yet support thin LTO.

Modules/Compiler/IBMClang.cmake

diff --git a/Modules/Compiler/IBMClang.cmake b/Modules/Compiler/IBMClang.cmake
index a9d760f..169a0f0 100644
--- a/Modules/Compiler/IBMClang.cmake
+++ b/Modules/Compiler/IBMClang.cmake
@@ -43,7 +43,10 @@
   set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
   set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
 
-  set(_CMAKE_LTO_THIN TRUE)
+  # Thin LTO is not yet supported on AIX.
+  if(NOT (CMAKE_SYSTEM_NAME STREQUAL "AIX"))
+    set(_CMAKE_LTO_THIN TRUE)
+  endif()
 
   if(_CMAKE_LTO_THIN)
     set(CMAKE_${lang}_COMPILE_OPTIONS_IPO "-flto=thin")