[llvm] 81a8b20 - [SystemZ][z/OS] Define _XOPEN_SOURCE=600 for dlopen (#127254)

[via llvm-commits]

Author: Abhina Sree
Date: 2025-02-17T07:57:09-05:00
New Revision: 81a8b2004508a47f733bd8d1c063f7333577cf59

URL: https://github.com/llvm/llvm-project/commit/81a8b2004508a47f733bd8d1c063f7333577cf59
DIFF: https://github.com/llvm/llvm-project/commit/81a8b2004508a47f733bd8d1c063f7333577cf59.diff

LOG: [SystemZ][z/OS] Define _XOPEN_SOURCE=600 for dlopen (#127254)

On z/OS, dlopen is guarded by _XOPEN_SOURCE=600 so define it when
checking for the symbol.

Added: 
    

Modified: 
    llvm/cmake/config-ix.cmake

Removed: 
    


################################################################################
diff  --git a/llvm/cmake/config-ix.cmake b/llvm/cmake/config-ix.cmake
index c128fd2ed125c..15ae04f5a6913 100644
--- a/llvm/cmake/config-ix.cmake
+++ b/llvm/cmake/config-ix.cmake
@@ -390,7 +390,14 @@ if (NOT PURE_WINDOWS)
   if( HAVE_LIBDL )
     list(APPEND CMAKE_REQUIRED_LIBRARIES dl)
   endif()
+  # Add the _XOPEN_SOURCE macro on z/OS, as certain test(s) use dlopen
+  if (ZOS)
+    list(APPEND CMAKE_REQUIRED_DEFINITIONS "-D_XOPEN_SOURCE=600")
+  endif()
   check_symbol_exists(dlopen dlfcn.h HAVE_DLOPEN)
+  if (ZOS)
+    list(REMOVE_ITEM CMAKE_REQUIRED_DEFINITIONS "-D_XOPEN_SOURCE=600")
+  endif()
   if( HAVE_LIBDL )
     list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES dl)
   endif()