From ad48c32e1e64462a82d0cd24b0aa256b8b3a2b6b Mon Sep 17 00:00:00 2001
From: Arvid Gerstmann <dev@arvid-g.de>
Date: Sat, 14 Jul 2018 11:08:17 +0200
Subject: [PATCH] Support for callstacks on Linux without glibc

---
 client/TracyCallstack.cpp | 10 +++++-----
 client/TracyCallstack.hpp | 21 +++++++++++++--------
 2 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/client/TracyCallstack.cpp b/client/TracyCallstack.cpp
index 94a5afd4..8e549b65 100644
--- a/client/TracyCallstack.cpp
+++ b/client/TracyCallstack.cpp
@@ -3,10 +3,10 @@
 
 #ifdef TRACY_HAS_CALLSTACK
 
-#if defined _WIN32 || defined __CYGWIN__
+#if TRACY_HAS_CALLSTACK == 1
 #  include <windows.h>
 #  include <dbghelp.h>
-#elif defined _GNU_SOURCE
+#elif TRACY_HAS_CALLSTACK >= 2
 #  include <dlfcn.h>
 #  include <cxxabi.h>
 #endif
@@ -14,7 +14,7 @@
 namespace tracy
 {
 
-#if defined _WIN32 || defined __CYGWIN__
+#if TRACY_HAS_CALLSTACK == 1
 
 extern "C" t_RtlWalkFrameChain RtlWalkFrameChain = 0;
 
@@ -77,7 +77,7 @@ CallstackEntry DecodeCallstackPtr( uint64_t ptr )
     return ret;
 }
 
-#elif defined __ANDROID__
+#elif TRACY_HAS_CALLSTACK == 2
 
 CallstackEntry DecodeCallstackPtr( uint64_t ptr )
 {
@@ -156,7 +156,7 @@ CallstackEntry DecodeCallstackPtr( uint64_t ptr )
     return ret;
 }
 
-#elif defined _GNU_SOURCE
+#elif TRACY_HAS_CALLSTACK == 3
 
 CallstackEntry DecodeCallstackPtr( uint64_t ptr )
 {
diff --git a/client/TracyCallstack.hpp b/client/TracyCallstack.hpp
index 0f46ebc1..c9a4b235 100644
--- a/client/TracyCallstack.hpp
+++ b/client/TracyCallstack.hpp
@@ -2,18 +2,23 @@
 #define __TRACYCALLSTACK_HPP__
 
 #if defined _WIN32 || defined __CYGWIN__
-#  define TRACY_HAS_CALLSTACK
+#  define TRACY_HAS_CALLSTACK 1
 extern "C"
 {
     typedef unsigned long (__stdcall *t_RtlWalkFrameChain)( void**, unsigned long, unsigned long );
     extern t_RtlWalkFrameChain RtlWalkFrameChain;
 }
 #elif defined __ANDROID__
-#  define TRACY_HAS_CALLSTACK
+#  define TRACY_HAS_CALLSTACK 2
 #  include <unwind.h>
-#elif defined _GNU_SOURCE
-#  define TRACY_HAS_CALLSTACK
-#  include <execinfo.h>
+#elif defined __linux
+#  if defined _GNU_SOURCE && defined __has_include && __has_include(<execinfo.h>)
+#    define TRACY_HAS_CALLSTACK 3
+#    include <execinfo.h>
+#  elif defined __has_include && __has_include(<unwind.h>)
+#    define TRACY_HAS_CALLSTACK 2
+#    include <unwind.h>
+#  endif
 #endif
 
 
@@ -38,7 +43,7 @@ struct CallstackEntry
 
 CallstackEntry DecodeCallstackPtr( uint64_t ptr );
 
-#if defined _WIN32 || defined __CYGWIN__
+#if TRACY_HAS_CALLSTACK == 1
 
 void InitCallstack();
 
@@ -53,7 +58,7 @@ static tracy_force_inline void* Callstack( int depth )
     return trace;
 }
 
-#elif defined __ANDROID__
+#elif TRACY_HAS_CALLSTACK == 2
 
 static tracy_force_inline void InitCallstack() {}
 
@@ -88,7 +93,7 @@ static tracy_force_inline void* Callstack( int depth )
     return trace;
 }
 
-#elif defined _GNU_SOURCE
+#elif TRACY_HAS_CALLSTACK == 3
 
 static tracy_force_inline void InitCallstack() {}