From 8034a70bd3122005aab485013f85cebe12989cd2 Mon Sep 17 00:00:00 2001
From: Yichen <oraluben@outlook.com>
Date: Mon, 5 Apr 2021 11:24:46 +0800
Subject: [PATCH] Check for libc++ instead of clang to workaround a libc++ bug.
 (#3194)

---
 lib/mathlib.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/mathlib.cpp b/lib/mathlib.cpp
index dab7a3fd2..8f04f8b8b 100644
--- a/lib/mathlib.cpp
+++ b/lib/mathlib.cpp
@@ -603,7 +603,7 @@ double MathLib::toDoubleNumber(const std::string &str)
     // nullcheck
     if (isNullValue(str))
         return 0.0;
-#ifdef __clang__
+#ifdef _LIBCPP_VERSION
     if (isFloat(str)) // Workaround libc++ bug at http://llvm.org/bugs/show_bug.cgi?id=17782
         // TODO : handle locale
         return std::strtod(str.c_str(), nullptr);