From: Yann Collet <cyan@fb.com>
Date: Mon, 4 Dec 2017 23:57:01 +0000 (-0800)
Subject: fix #911 : changed detection macro for clock_gettime()
X-Git-Tag: v1.3.3^2~19^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e46194bbf95aa11b81f3cc1be83f13d3f888421d;p=thirdparty%2Fzstd.git

fix #911 : changed detection macro for clock_gettime()

The new macro might be a bit too restrictive.
Systems which do not support new test will simply default to <time.h>'s `clock_t clock()`,
suffering lesser benchmark accuracy.
Should it matter, the detection macro will have to be upgraded.
---

diff --git a/programs/util.h b/programs/util.h
index 37098f2f7..f510bc5e0 100644
--- a/programs/util.h
+++ b/programs/util.h
@@ -168,7 +168,7 @@ static int g_utilDisplayLevel;
         }
         return ((clockEnd - clockStart) * (U64)rate.numer) / ((U64)rate.denom);
     }
-#elif (PLATFORM_POSIX_VERSION >= 200112L)
+#elif defined __UCLIBC__ || ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 17) || __GLIBC__ > 2)
     #include <time.h>
     #define UTIL_TIME_INITIALIZER { 0, 0 }
     typedef struct timespec UTIL_freq_t;