From 34c29ea88b8e9f6dead1a39cebe652f994ac0608 Mon Sep 17 00:00:00 2001
From: o9000 <mrovi9000@gmail.com>
Date: Sun, 3 Jan 2016 02:17:44 +0100
Subject: [PATCH] Show warning on missing backtrace libs

---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0af5296..cc00d5b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -56,6 +56,10 @@ if( NOT IMLIB_BUILD_WITH_X )
   message( FATAL_ERROR "Imlib is not built with X support" )
 endif( NOT IMLIB_BUILD_WITH_X )
 
+if( NOT BACKTRACE_LIBC_FOUND AND NOT UNWIND_FOUND AND NOT EXECINFO_FOUND )
+  message( WARNING "Backtrace support not available. You can enable it with libexecinfo/libunwind or libc." )
+endif()
+
 add_definitions( -D_GNU_SOURCE )
 
 include_directories( ${PROJECT_BINARY_DIR}