diff --git a/Source/kwsys/SystemInformation.cxx b/Source/kwsys/SystemInformation.cxx
index ed1cdc0..d3afe21 100644
--- a/Source/kwsys/SystemInformation.cxx
+++ b/Source/kwsys/SystemInformation.cxx
@@ -150,18 +150,8 @@ typedef struct rlimit ResourceLimitType;
 #  include <OS.h>
 #endif
 
-#if defined(KWSYS_SYSTEMINFORMATION_HAS_BACKTRACE)
-#  include <execinfo.h>
-#  if defined(KWSYS_SYSTEMINFORMATION_HAS_CPP_DEMANGLE)
-#    include <cxxabi.h>
-#  endif
-#  if defined(KWSYS_SYSTEMINFORMATION_HAS_SYMBOL_LOOKUP)
-#    include <dlfcn.h>
-#  endif
-#else
 #  undef KWSYS_SYSTEMINFORMATION_HAS_CPP_DEMANGLE
 #  undef KWSYS_SYSTEMINFORMATION_HAS_SYMBOL_LOOKUP
-#endif
 
 #include <cctype> // int isdigit(int c);
 #include <cstdio>
diff --git a/Source/kwsys/kwsysPlatformTestsCXX.cxx b/Source/kwsys/kwsysPlatformTestsCXX.cxx
index 0bfa20e..0208417 100644
--- a/Source/kwsys/kwsysPlatformTestsCXX.cxx
+++ b/Source/kwsys/kwsysPlatformTestsCXX.cxx
@@ -102,24 +102,6 @@ int main()
 }
 #endif
 
-#ifdef TEST_KWSYS_CXX_HAS_BACKTRACE
-#  if defined(__PATHSCALE__) || defined(__PATHCC__) ||                        \
-    (defined(__LSB_VERSION__) && (__LSB_VERSION__ < 41))
-backtrace does not work with this compiler or os
-#  endif
-#  if (defined(__GNUC__) || defined(__PGI)) && !defined(_GNU_SOURCE)
-#    define _GNU_SOURCE
-#  endif
-#  include <execinfo.h>
-int main()
-{
-  void* stackSymbols[256];
-  backtrace(stackSymbols, 256);
-  backtrace_symbols(&stackSymbols[0], 1);
-  return 0;
-}
-#endif
-
 #ifdef TEST_KWSYS_CXX_HAS_DLADDR
 #  if (defined(__GNUC__) || defined(__PGI)) && !defined(_GNU_SOURCE)
 #    define _GNU_SOURCE