another try to fix mac OSX (libunwind is not the one we think there)

[simgrid.git] / tools / cmake / Modules / FindLibunwind.cmake

diff --git a/tools/cmake/Modules/FindLibunwind.cmake b/tools/cmake/Modules/FindLibunwind.cmake
index aadb692..711f0ca 100644 (file)
--- a/tools/cmake/Modules/FindLibunwind.cmake
+++ b/tools/cmake/Modules/FindLibunwind.cmake
@@ -15,20 +15,25 @@ if(PROCESSOR_x86_64)
 endif()
 
 if(NOT PATH_LIBUNWIND_LIB)
-  find_library(PATH_LIBUNWIND_LIB
-    NAMES unwind
-    HINTS
-    $ENV{SIMGRID_LIBUNWIND_LIBRARY_PATH}
-    $ENV{LD_LIBRARY_PATH}
-    $ENV{LIBUNWIND_LIBRARY_PATH}
-    PATH_SUFFIXES lib/ GnuWin32/lib lib/system
-    PATHS
-    /opt
-    /opt/local
-    /opt/csw
-    /sw
-    /usr
-    /usr/lib/)
+  # 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}
+      PATH_SUFFIXES lib/ GnuWin32/lib lib/system
+      PATHS
+      /opt
+      /opt/local
+      /opt/csw
+      /sw
+      /usr
+      /usr/lib/)
+  endif()
 endif()
 
 find_path(PATH_LIBUNWIND_H "libunwind.h"
@@ -64,10 +69,12 @@ if(PATH_LIBUNWIND_LIB AND PATH_LIBUNWIND_H)
       
   include_directories(${PATH_LIBUNWIND_H})
   link_directories(${PATH_LIBUNWIND_LIB})
-  
+  SET(HAVE_LIBUNWIND 1)
 else()
-  message(FATAL_ERROR "Please either install the libunwind7-dev package (or equivalent) or turn off the model-checking option of SimGrid.")
+  SET(HAVE_LIBUNWIND 0)
 endif()
 
 mark_as_advanced(PATH_LIBDW_H)
 mark_as_advanced(PATH_LIBDW_LIB)
+mark_as_advanced(PATH_LIBUNWIND_LIB)
+mark_as_advanced(PATH_LIBUNWIND_H)