GCC-6: WARNING unordered_map: present but cannot be compiled

[ppericard]

Hi,
I am trying to compile SGA with gcc 6.2.0 on a debian system.
I encountered a few kinks with the bamtools library until I checked out the very last version which repaired support with gcc 6. And then I compiled SGA using gcc 6.
The compilation terminated with no error, but there is 2 warnings that seemed surprising and needed to be reported:

configure: WARNING: unordered_map: present but cannot be compiled
configure: WARNING: unordered_map: check for missing prerequisite headers?
configure: WARNING: unordered_map: see the Autoconf documentation
configure: WARNING: unordered_map: section "Present But Cannot Be Compiled"
configure: WARNING: unordered_map: proceeding with the compiler's result
configure: WARNING: ## -------------------------------- ##
configure: WARNING: ## Report this to [email protected] ##
configure: WARNING: ## -------------------------------- ##

configure: WARNING: unordered_set: present but cannot be compiled
configure: WARNING: unordered_set: check for missing prerequisite headers?
configure: WARNING: unordered_set: see the Autoconf documentation
configure: WARNING: unordered_set: section "Present But Cannot Be Compiled"
configure: WARNING: unordered_set: proceeding with the compiler's result
configure: WARNING: ## -------------------------------- ##
configure: WARNING: ## Report this to [email protected] ##
configure: WARNING: ## -------------------------------- ##

The full compiling log is attached here: sga_compile.txt

[jts]

Thanks - I'll look into resolving these warnings.