--- ./base/debug/stack_trace_posix.cc.orig
+++ ./base/debug/stack_trace_posix.cc
@@ -22,7 +22,7 @@
 #if defined(__GLIBCXX__)
 #include <cxxabi.h>
 #endif
-#if !defined(__UCLIBC__)
+#if defined(HAVE_BACKTRACE)
 #include <execinfo.h>
 #endif
 
@@ -73,7 +73,7 @@
   // Note: code in this function is NOT async-signal safe (std::string uses
   // malloc internally).
 
-#if defined(__GLIBCXX__) && !defined(__UCLIBC__)
+#if defined(__GLIBCXX__) && defined(HAVE_BACKTRACE)
 
   std::string::size_type search_from = 0;
   while (search_from < text->size()) {
@@ -169,7 +169,7 @@
 
     handler->HandleOutput("\n");
   }
-#elif !defined(__UCLIBC__)
+#elif defined(HAVE_BACKTRACE)
   bool printed = false;
 
   // Below part is async-signal unsafe (uses malloc), so execute it only
@@ -738,7 +738,7 @@
   // NOTE: This code MUST be async-signal safe (it's used by in-process
   // stack dumping signal handler). NO malloc or stdio is allowed here.
 
-#if !defined(__UCLIBC__)
+#if defined(HAVE_BACKTRACE)
   // Though the backtrace API man page does not list any possible negative
   // return values, we take no chance.
   count_ = base::saturated_cast<size_t>(backtrace(trace_, arraysize(trace_)));
@@ -751,13 +751,13 @@
   // NOTE: This code MUST be async-signal safe (it's used by in-process
   // stack dumping signal handler). NO malloc or stdio is allowed here.
 
-#if !defined(__UCLIBC__)
+#if defined(HAVE_BACKTRACE)
   PrintBacktraceOutputHandler handler;
   ProcessBacktrace(trace_, count_, &handler);
 #endif
 }
 
-#if !defined(__UCLIBC__)
+#if defined(HAVE_BACKTRACE)
 void StackTrace::OutputToStream(std::ostream* os) const {
   StreamBacktraceOutputHandler handler(os);
   ProcessBacktrace(trace_, count_, &handler);
--- ./third_party/WebKit/Source/wtf/Assertions.cpp.orig
+++ ./third_party/WebKit/Source/wtf/Assertions.cpp
@@ -61,7 +61,7 @@
 #define HAVE_ISDEBUGGERPRESENT 1
 #endif
 
-#if OS(MACOSX) || (OS(LINUX) && !defined(__UCLIBC__))
+#if defined(HAVE_BACKTRACE)
 #include <cxxabi.h>
 #include <dlfcn.h>
 #include <execinfo.h>
@@ -222,7 +222,7 @@
 
 void WTFGetBacktrace(void** stack, int* size)
 {
-#if OS(MACOSX) || (OS(LINUX) && !defined(__UCLIBC__))
+#if defined(HAVE_BACKTRACE)
     *size = backtrace(stack, *size);
 #elif OS(WIN)
     // The CaptureStackBackTrace function is available in XP, but it is not defined
@@ -260,7 +260,7 @@
     : m_name(0)
     , m_cxaDemangled(0)
 {
-#if OS(MACOSX) || (OS(LINUX) && !defined(__UCLIBC__))
+#if defined(HAVE_BACKTRACE)
     Dl_info info;
     if (!dladdr(addr, &info) || !info.dli_sname)
         return;
--- ./third_party/webrtc/base/checks.cc.orig
+++ ./third_party/webrtc/base/checks.cc
@@ -16,7 +16,7 @@
 #include <cstdio>
 #include <cstdlib>
 
-#if defined(__GLIBCXX__) && !defined(__UCLIBC__)
+#if defined(HAVE_BACKTRACE)
 #include <cxxabi.h>
 #include <execinfo.h>
 #endif
@@ -55,7 +55,7 @@
 // to get usable symbols on Linux. This is copied from V8. Chromium has a more
 // advanced stace trace system; also more difficult to copy.
 void DumpBacktrace() {
-#if defined(__GLIBCXX__) && !defined(__UCLIBC__)
+#if defined(HAVE_BACKTRACE)
   void* trace[100];
   int size = backtrace(trace, sizeof(trace) / sizeof(*trace));
   char** symbols = backtrace_symbols(trace, size);