From 3d7e7eee763c2f0b71df75a4da2306a6bb01f2b0 Mon Sep 17 00:00:00 2001
From: Navarrop <Pierre.Navarro@imag.fr>
Date: Thu, 23 Jun 2011 16:45:18 +0200
Subject: [PATCH] To use ucontext on OSX gcc must be greater than 4.5

---
 CMakeLists.txt                         |  3 +--
 buildtools/Cmake/CompleteInFiles.cmake | 10 ++++++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 67a7a81a95..b4f48f4f75 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,13 +18,12 @@ set(SIMGRID_VERSION_MAJOR "3")
 set(SIMGRID_VERSION_MINOR "6")
 set(SIMGRID_VERSION_PATCH "0")
 
-
-
 set(release_version "${SIMGRID_VERSION_MAJOR}.${SIMGRID_VERSION_MINOR}")
 set(libsimgrid_version "${release_version}")
 set(libgras_version "${release_version}")
 set(libsmpi_version "${release_version}")
 set(GCC_NEED_VERSION "4.0")
+set(APPLE_NEED_GCC_VERSION "4.6")
 
 ### SET THE LIBRARY EXTENSION AND GCC VERSION
 if(APPLE) #MAC
diff --git a/buildtools/Cmake/CompleteInFiles.cmake b/buildtools/Cmake/CompleteInFiles.cmake
index 492c173224..49d1d001f0 100644
--- a/buildtools/Cmake/CompleteInFiles.cmake
+++ b/buildtools/Cmake/CompleteInFiles.cmake
@@ -697,6 +697,16 @@ if(ADDR2LINE)
 set(ADDR2LINE "${ADDR2LINE}/addr2line")
 endif(ADDR2LINE)
 
+
+
+### Check if OSX can compile with ucontext (with gcc 4.[1-5] it is broken)
+if(APPLE)
+    if(APPLE_NEED_GCC_VERSION GREATER COMPILER_C_VERSION_MAJOR_MINOR)
+        message(STATUS "Ucontext can't be used with this version of gcc (must be greater than 4.5")
+        set(HAVE_UCONTEXT_H 0)
+    endif(APPLE_NEED_GCC_VERSION GREATER COMPILER_C_VERSION_MAJOR_MINOR)
+endif(APPLE)
+
 ### File to create
 
 configure_file("${CMAKE_HOME_DIRECTORY}/src/context_sysv_config.h.in" 			"${CMAKE_BINARY_DIR}/src/context_sysv_config.h" @ONLY IMMEDIATE)
-- 
2.20.1