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From 19d00c15710840910a7397252c14d612746631fe Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Mon, 8 Mar 2021 14:58:40 -0800
Subject: [PATCH] Link libexecinfo if its found, this is needed for musl based
 systems

Fixes
ld: libglog.so.0.4.0: undefined reference to `backtrace'
| collect2: error: ld returned 1 exit status

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

---
 CMakeLists.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 846b444..1553358 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -162,6 +162,7 @@ cmake_pop_check_state ()
 check_cxx_symbol_exists (snprintf cstdio HAVE_SNPRINTF)
 
 check_library_exists (dbghelp UnDecorateSymbolName "" HAVE_DBGHELP)
+check_library_exists (execinfo backtrace "" HAVE_EXECINFO)
 
 check_cxx_source_compiles ("
 #include <cstdlib>
@@ -629,6 +630,10 @@ if (Unwind_FOUND)
   set (Unwind_DEPENDENCY "find_dependency (Unwind ${Unwind_VERSION})")
 endif (Unwind_FOUND)
 
+if (HAVE_EXECINFO)
+  target_link_libraries (glog PUBLIC execinfo)
+endif (HAVE_EXECINFO)
+
 if (HAVE_DBGHELP)
   target_link_libraries (glog PRIVATE dbghelp)
   set (glog_libraries_options_for_static_linking "${glog_libraries_options_for_static_linking} -ldbghelp")