Allow CMake user to disable Symbolize functionality

Currently the user has to rely on the HAVE_SYMBOLIZE detection inside
CMakeLists.txt without having any control over whether it should be used.

Add support for disabling HAVE_SYMBOLIZE at configure time so user can specify
`cmake -DHAVE_SYMBOLIZE=0`.
Signed-off-by: Ed Baunton <ebaunton1@bloomberg.net>

CMakeLists.txt

@@ -25,6 +25,7 @@ option (PRINT_UNSYMBOLIZED_STACK_TRACES
   "Print file offsets in traces instead of symbolizing" OFF)
 option (WITH_PKGCONFIG "Enable pkg-config support" ON)
 option (WITH_UNWIND "Enable libunwind support" ON)
+option (WITH_SYMBOLIZE "Enable symbolize module" ON)
 
 if (NOT WITH_UNWIND)
   set (CMAKE_DISABLE_FIND_PACKAGE_Unwind ON)
@@ -365,7 +366,8 @@ if (HAVE_EXECINFO_H)
   set (HAVE_STACKTRACE 1)
 endif (HAVE_EXECINFO_H)
 
-if (WIN32 OR CYGWIN)
+if (WITH_SYMBOLIZE)
+  if (WIN32 OR CYGWIN)
     cmake_push_check_state (RESET)
     set (CMAKE_REQUIRED_LIBRARIES DbgHelp)
 
@@ -400,9 +402,10 @@ if (WIN32 OR CYGWIN)
     if (HAVE_SYMBOLIZE)
       set (HAVE_STACKTRACE 1)
     endif (HAVE_SYMBOLIZE)
-elseif (UNIX OR (APPLE AND HAVE_DLADDR))
+  elseif (UNIX OR (APPLE AND HAVE_DLADDR))
     set (HAVE_SYMBOLIZE 1)
-endif (WIN32 OR CYGWIN)
+  endif (WIN32 OR CYGWIN)
+endif (WITH_SYMBOLIZE)
 
 check_cxx_source_compiles ("
 #include <cstdlib>