From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Thu, 29 Nov 2018 18:01:59 +0000 (+0300)
Subject: Using acosh(0) to get NaN in runtime.
X-Git-Tag: 0.2.7~14
X-Git-Url: http://git.kaiwu.me/postgresql/log/contrib/postgres_fdw/static/gitweb.js?a=commitdiff_plain;h=d8829f433393a84a1c0bc758dc540f6c3c35f887;p=njs.git

Using acosh(0) to get NaN in runtime.

macOS clang 10 optimizes sqrt(-1) out using garbage value
instead.
---

diff --git a/nxt/auto/clang b/nxt/auto/clang
index b79abef4..7aa675a1 100644
--- a/nxt/auto/clang
+++ b/nxt/auto/clang
@@ -314,7 +314,7 @@ nxt_feature_test="#include <math.h>
                   #include <stdint.h>
 
                   int main(void) {
-                      int64_t  i64 = sqrt(-1);
+                      int64_t  i64 = acosh(0);
                       printf(\"%x\", (uint32_t) i64);
                       return 0;
                   }"