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include/u.h: define _DEFAULT_SOURCE for new glibc

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glibc devs have apparently decided _BSD_SOURCE will be
deprecated on Linux, and issue a preprocessor warning if
declaring _BSD_SOURCE without _DEFAULT_SOURCE.

https://sourceware.org/glibc/wiki/Release/2.20

Fixes #8397.

LGTM=iant
R=dave, gobot, iant
CC=golang-codereviews
https://golang.org/cl/112530043
This commit is contained in:
Bobby Powers 2014-07-25 08:54:09 -07:00 committed by Ian Lance Taylor
parent 0f2cde8bdc
commit da8f677815
1 changed files with 1 additions and 0 deletions
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include/u.h
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@ -40,6 +40,7 @@ extern "C" {
#endif
#define _BSD_SOURCE 1
#define _NETBSD_SOURCE 1 /* NetBSD */
#define _DEFAULT_SOURCE 1 /* glibc > 2.19 */
#define _SVID_SOURCE 1
#if !defined(__APPLE__) && !defined(__OpenBSD__)
# define _XOPEN_SOURCE 1000