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ssp: further refine the conditional used for constructor priority

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__has_attribute(__constructor__) is a better test for clang than
defined(__clang__). Switch to it instead.

While we're already here and touching it, pfg@ nailed down when GCC actually
introduced the priority argument -- 4.3. Use that instead of our
hammer-guess of GCC >= 5 for the sake of correctness.
This commit is contained in:
Kyle Evans 2019-11-13 18:21:06 +00:00
parent 301b49d2e5
commit 4e0706cbdf
1 changed files with 1 additions and 1 deletions
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2
lib/libc/secure/stack_protector.c
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@ -50,7 +50,7 @@ __FBSDID("$FreeBSD$");
*
* This conditional should be removed when GCC 4.2 is removed.
*/
#if defined(__clang__) || (defined(__GNUC__) && __GNUC__ > 4)
#if __has_attribute(__constructor__) || __GNUC_PREREQ__(4, 3)
#define _GUARD_SETUP_CTOR_ATTR \
__attribute__((__constructor__ (200), __used__));
#else