Provide std::abs(<floating-point>) in <cmath> on Solaris.
1) <cstdlib> header should define std::abs([int|long|long long])
functions. They use "using ::abs" to import these functions (which are
declared in <stdlib.h>) into std namespace.
2) <cmath> header should define std::abs([float|double|long double])
function. If we try define new functions in std namespace, then it
will cause compile error in <cstdlib> because "using ::abs" will try
import not only [int|long|long long] functions, but also
[float|double|long double] which are defined in <math.h> header on
solaris.
Patch by C Bergstrom.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@232641 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/cmath b/include/cmath
index b340b4d..5f9aaed 100644
--- a/include/cmath
+++ b/include/cmath
@@ -654,6 +654,10 @@
// abs
+#if defined(__sun__)
+using ::abs;
+#endif
+
#if !defined(_AIX) && !defined(__sun__)
inline _LIBCPP_INLINE_VISIBILITY
float