SpiderNode assumes libstdc++ on Mac; fails on "'tr1/type_traits' file not found" with libc++

[mykmelez]

SpiderNode assumes libstdc++ on Mac, where it includes the <tr1/type_traits> header, which is only available in libstdc++:

spidernode/src/util.h

Lines 13 to 17 in f9cd4f6

	#ifdef __APPLE__
	#include <tr1/type_traits>
	#else
	#include <type_traits> // std::remove_reference
	#endif

But Electron builds with libc++:

https://github.com/electron/electron/blob/master/toolchain.gypi#L115-L116

So when I configure Electron to build SpiderNode, the build fails with "'tr1/type_traits' file not found."

[ehsan]

I have a fix for this which I'll push to master shortly, but note that per nodejs/node-gyp#469, you shouldn't be changing the gyp flags to build with libc++, just target OSX 10.9, by setting:

export CXXFLAGS="-mmacosx-version-min=10.9"
export LDFLAGS="-mmacosx-version-min=10.9"

before configuring.

I will also upstream this fix to node.

[ehsan]

Upstream fix: nodejs/node#7778