From bc59b72fa97d362dd56b856d84e02638d8a9bb91 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Sat, 25 Jun 2011 12:40:57 +1000
Subject: [PATCH] Add prelim backtrace support detection in build

---
 Makefile.am                             | 7 ++++++-
 backtrace.cpp => backtrace_execinfo.cpp | 0
 configure.ac                            | 6 +++++-
 3 files changed, 11 insertions(+), 2 deletions(-)
 rename backtrace.cpp => backtrace_execinfo.cpp (100%)

diff --git a/Makefile.am b/Makefile.am
index 7e20a0b1..de292f44 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -27,7 +27,6 @@ UTIL_INCLUDE =  \
     version.hpp
 
 UTIL_FILES   =	\
-    backtrace.cpp \
     debug.cpp   \
     except.cpp  \
     float.cpp	\
@@ -44,6 +43,12 @@ UTIL_FILES   =	\
     vector.cpp  \
     version.cpp
 
+
+if HAVE_EXECINFO
+UTIL_FILES += backtrace_execinfo.cpp
+endif
+
+
 CLEANFILES = json.cpp version.cpp ip.cpp
 EXTRA_DIST = json.cpp.rl version.cpp.rl ip.cpp.rl
 
diff --git a/backtrace.cpp b/backtrace_execinfo.cpp
similarity index 100%
rename from backtrace.cpp
rename to backtrace_execinfo.cpp
diff --git a/configure.ac b/configure.ac
index c52bbcd7..ae9ef701 100644
--- a/configure.ac
+++ b/configure.ac
@@ -67,9 +67,13 @@ AC_C_INLINE
 AC_C_BIGENDIAN
 
 ##
-## stdlib features
+## platform features
 AC_FUNC_MMAP
 
+AC_CHECK_HEADER([execinfo.h], [break], [AC_MSG_ERROR([Missing backtrace support])])
+
+AM_CONDITIONAL([HAVE_EXECINFO], [test x$ac_cv_header_execinfo_h = "xyes"])
+
 
 ##
 ## Documentation