https://llvm.org/bugs/show_bug.cgi?id=26754
Bug ID: 26754
Summary: c++11 name inclusion without std=c++11
Product: libc++
Version: unspecified
Hardware: PC
OS: FreeBSD
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: fernando.apesteg...@gmail.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
Classification: Unclassified
It seems that 'array' name is included into std namespace even if no -std=c++11
is specified.
Here is a test program:
#include <iostream>
using namespace std;
template<typename T>
struct array {
array(T t);
};
using ::array;
template<typename T>
::array<T>::array(T t) {}
array<int> x(1);
Compile with clang++ -c foo.cpp unless otherwise specified. Some results:
FreeBSD 10.2
_LIBCPP_VERSION 1101
clang++ --version
FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) 20140512
Target: x86_64-unknown-freebsd10.2
Thread model: posix
Compilation OK.
-----------------------
FreeBSD 11.0-CURRENT
foo.cpp:12:1: error: unknown type name 'array'
array<int> x(1);
^
2 errors generated
clang 3.7.1 (tags/RELEASE_371/final 255217)
Compilation FAILS
-----------------------------
Ubuntu 14.04
clang++ --version
Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on LLVM 3.4)
Target: x86_64-pc-linux-gnu
Thread model: posix
Compilation OK
If compiled with libc++
clang++ -c -stdlib=libc++ foo.cpp
Compilation OK.
-----------------------------
The problem was detected with cad/OpenVsp from our ports tree:
http://www.freshports.org/cad/openvsp/
That program compiled fine in FreeBSD 9.x and 10.x but fails with the new
clang/libc++ in 11-current.
You can see the discussion here:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207253
I don't know if maybe I'm missing something obvious here...
Please, let me know should you need me to run some tests.
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