Revert "Fix MC builds after my fix for Mac OSX around libunwind :-("

This reverts commit 182a4405d85c87f52db5fcd8eaf8b04d3b27a3c8.

diff --git a/tools/cmake/Modules/FindLibunwind.cmake b/tools/cmake/Modules/FindLibunwind.cmake
index bce74ff..711f0ca 100644 (file)
--- a/tools/cmake/Modules/FindLibunwind.cmake
+++ b/tools/cmake/Modules/FindLibunwind.cmake
@@ -15,9 +15,13 @@ if(PROCESSOR_x86_64)
 endif()
 
 if(NOT PATH_LIBUNWIND_LIB)
-  find_library(PATH_LIBUNWIND_LIB
-    NAMES unwind
-    HINTS
+  # Mac OSX has a libunwind that is not the one we need
+  CHECK_LIBRARY_EXISTS(unwind unw_init_local "Whether libunwind is usable" RIGHT_LIBUNWIND)
+
+  if (RIGHT_LIBUNWIND)
+    find_library(PATH_LIBUNWIND_LIB
+      NAMES unwind
+      HINTS
       $ENV{SIMGRID_LIBUNWIND_LIBRARY_PATH}
       $ENV{LD_LIBRARY_PATH}
       $ENV{LIBUNWIND_LIBRARY_PATH}
@@ -29,13 +33,6 @@ if(NOT PATH_LIBUNWIND_LIB)
       /sw
       /usr
       /usr/lib/)
-      
-  # Mac OSX has a libunwind that is not the one we need, so double check
-  if (PATH_LIBUNWIND_LIB)
-    CHECK_LIBRARY_EXISTS(unwind unw_init_local PATH_LIBUNWIND_LIB RIGHT_LIBUNWIND)
-    if (NOT RIGHT_LIBUNWIND)
-      unset(PATH_LIBUNWIND_LIB)
-    endif()
   endif()
 endif()