From 7f60edb1d696c8dc849b92c50b03ded536497b2c Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Sun, 20 Feb 2022 13:11:32 -0800 Subject: [PROPOSED 2/2] * private.h (UNINIT_TRAP): Add comment. --- private.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/private.h b/private.h index 4c03324..e8c0942 100644 --- a/private.h +++ b/private.h @@ -689,6 +689,12 @@ time_t time2posix_z(timezone_t, time_t) ATTRIBUTE_PURE; # define INITIALIZE(x) #endif +/* Whether memory access must strictly follow the C standard. + If 0, it's OK to read uninitialized storage so long as the value is + not relied upon. Defining it to 0 lets mktime access parts of + struct tm that might be uninitialized, as a heuristic when the + standard doesn't say what to return and when tm_gmtoff can help + mktime likely infer a better value. */ #ifndef UNINIT_TRAP # define UNINIT_TRAP 0 #endif -- 2.32.0