tools: Fix cmake build on FreeBSD 10.1

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

SVN-Revision: 44281

tools/cmake/patches/110-freebsd-compat.patch

+From 6eab64c3adc7a38c322cd4d9a1a1881f2d49cb9c Mon Sep 17 00:00:00 2001
+From: Raphael Kubo da Costa <rakuco@FreeBSD.org>
+Date: Tue, 15 Oct 2013 00:10:56 +0300
+Subject: [PATCH] SystemInformation: Include backtrace-related headers on
+ FreeBSD
+
+This was probably broken for a long while, but the problem was not apparent
+because the check for execinfo.h would fail by default because
+-I/usr/local/include was not being passed to the compiler when making the
+checks for the header's existence.
+
+Now that very recent FreeBSD versions (ie. 10-CURRENT) have NetBSD's
+libexecinfo in base (and it is thus installed into /usr), the
+backtrace-related checks would pass, but the required headers were not being
+included in SystemInformation.cxx.
+
+Change-Id: I3b91ed7ac0e6878035aee202b3336c536cc6d2ff
+---
+ Source/kwsys/SystemInformation.cxx |    9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/Source/kwsys/SystemInformation.cxx b/Source/kwsys/SystemInformation.cxx
+index 7c31f3a..2672730 100644
+--- a/Source/kwsys/SystemInformation.cxx
++++ b/Source/kwsys/SystemInformation.cxx
+@@ -88,6 +88,15 @@ typedef int siginfo_t;
+ #  include <ifaddrs.h>
+ #  define KWSYS_SYSTEMINFORMATION_IMPLEMENT_FQDN
+ # endif
++# if defined(KWSYS_SYSTEMINFORMATION_HAS_BACKTRACE)
++#  include <execinfo.h>
++#  if defined(KWSYS_SYSTEMINFORMATION_HAS_CPP_DEMANGLE)
++#    include <cxxabi.h>
++#  endif
++#  if defined(KWSYS_SYSTEMINFORMATION_HAS_SYMBOL_LOOKUP)
++#    include <dlfcn.h>
++#  endif
++# endif
+ #endif
+ 
+ #if defined(__OpenBSD__) || defined(__NetBSD__)
+-- 
+1.7.10.4
+