[PATCHv2] feature_test_macros.7: document clang fortify support

[Mingye Wang <arthur200126@xxxxxxxxx>]

Hi Alex,

Attached is the revised patch.

> That means, unformatted GCC 4.0 and Clang 2.6.

I've done that in the new version, but there are still a lot of ".BR
gcc (1)" in my version
of the tree from other pages. Are these to be changed in the future?

Best,
Mingye

Attachment: 0001-feature_test_macros.7-document-clang-fortify-support.patch
Description: Binary data