Merge pull request #3735 from gilles-peskine-arm/entropy_poll-_gnu_source-2.16

Backport 2.16: Don't redefine _GNU_SOURCE if it's already defined
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Gilles Peskine 2020-10-05 17:25:29 +02:00 committed by GitHub
commit 2f26bf7e88
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2 changed files with 4 additions and 1 deletions

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Bugfix
* Fix the build when the macro _GNU_SOURCE is defined to a non-empty value.
Fix #3432.

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* ********** * **********
*/ */
#if defined(__linux__) #if defined(__linux__) && !defined(_GNU_SOURCE)
/* Ensure that syscall() is available even when compiling with -std=c99 */ /* Ensure that syscall() is available even when compiling with -std=c99 */
#define _GNU_SOURCE #define _GNU_SOURCE
#endif #endif