diff options
author | Johann Koenig <johannkoenig@google.com> | 2019-11-26 14:44:15 +0000 |
---|---|---|
committer | Gerrit Code Review <noreply-gerritcodereview@google.com> | 2019-11-26 14:44:15 +0000 |
commit | b8549ed8895303019730da9e7ffa7945d3ac4d0d (patch) | |
tree | cc379acad411499d80b61ed2bbfbeb5840ab67b2 | |
parent | 8d211a3969ecf2d942edd5063a6d19317e5c28ec (diff) | |
parent | 2ed1830ca5bae0e8cd2e63dddbcc32261e838231 (diff) | |
download | libvpx-b8549ed8895303019730da9e7ffa7945d3ac4d0d.tar.gz |
Merge "fix __has_attribute in visual studio"
-rw-r--r-- | vpx_ports/mem.h | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/vpx_ports/mem.h b/vpx_ports/mem.h index 737e9e071..4e9041304 100644 --- a/vpx_ports/mem.h +++ b/vpx_ports/mem.h @@ -51,13 +51,19 @@ #define VPX_WITH_ASAN 0 #endif // __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__) +#if !defined(__has_attribute) +#define __has_attribute(x) 0 +#endif // !defined(__has_attribute) + #if __has_attribute(uninitialized) -// Attribute disables -ftrivial-auto-var-init=pattern for specific variables. +// Attribute "uninitialized" disables -ftrivial-auto-var-init=pattern for +// the specified variable. +// // -ftrivial-auto-var-init is security risk mitigation feature, so attribute // should not be used "just in case", but only to fix real performance -// bottlenecks when other approaches do not work. In general compiler is quite -// effective eleminating unneeded initializations introduced by the flag, e.g. -// when they are followed by actual initialization by a program. +// bottlenecks when other approaches do not work. In general the compiler is +// quite effective at eliminating unneeded initializations introduced by the +// flag, e.g. when they are followed by actual initialization by a program. // However if compiler optimization fails and code refactoring is hard, the // attribute can be used as a workaround. #define VPX_UNINITIALIZED __attribute__((uninitialized)) |