Merge pull request #3090 from diffblue/macos_backtrace

added backtrace output on the Mac

Author: tautschnig

src/util/invariant.cpp

@@ -20,7 +20,7 @@ Author: Martin Brain, [email protected]
 // So we should include something explicitly from the C library
 // to check if the C library is glibc.
 #include <assert.h>
-#ifdef __GLIBC__
+#if defined(__GLIBC__) || defined(__APPLE__)
 
 // GCC needs LINKFLAGS="-rdynamic" to give function names in the backtrace
 #include <execinfo.h>
@@ -78,7 +78,7 @@ static bool output_demangled_name(
 void print_backtrace(
   std::ostream &out)
 {
-#ifdef __GLIBC__
+#if defined(__GLIBC__) || defined(__APPLE__)
     void * stack[50] = {};
 
     std::size_t entries=backtrace(stack, sizeof(stack) / sizeof(void *));