[cfe-dev] Problem with libc++

Howard Hinnant hhinnant at apple.com
Tue Apr 3 08:20:34 PDT 2012

On Apr 3, 2012, at 10:36 AM, Dix Lorenz wrote:

> I don't know if this is the right place for this, if not please direct me to a better place.
> I just downloaded clang and libc++ trunk. This code fails:
> #include <string>
> #include <vector>
> using namespace std;
> int main(int argc, const char * argv[])
> {
> 	vector<string> v;
> 	v.push_back("Hello"); // <--- error here
>    return 0;
> }
> The error is "no viable overloaded '='". It seems as if moving strings is broken...
> This is in Xcode 4.3.2 (with the include directory from libc++ trunk replacing /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/usr/include/c++/v1). If I switch to the "normal" clang Compiler in Xcode it works. If I switch from using "libc++" to "libstdc++" it also works, its the combination of the current clang and libc++ that have this problem.
> /opt/bin/clang --version
> clang version 3.1 (trunk 153948)
> Target: x86_64-apple-darwin11.3.0

This is looking like a clang problem.  I've got TOT libc++, but a slightly older clang and I'm not seeing this behavior.


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