Link Error Using gcc49 port on Mac OS 10.9

Geoffrey Odhner Geoffrey at
Fri Dec 6 13:38:09 PST 2013

Thanks, Ryan,

I adding /opt/local/lib/gcc49/libstdc++.a  to the compile line, 
following the working case described in the post you found. (It's funny 
how selective search engines can be for different people.)  While it's 
not an ideal solution, this gets me running.  I really appreciate your 
pointing me to it.  Thanks.


On 6 Dec 2013, at 2:59, Ryan Schmidt wrote:

> On Dec 5, 2013, at 23:10, Geoffrey Odhner wrote:
>> I just installed MacPorts, and gcc49, and tried to compile a simple 
>> program, which really should work, but I'm getting a link error.  I 
>> narrowed it down, and if I take out the use of any regex then it will 
>> link.  I can leave in the #include <regex> line, but if I have any 
>> line that actually does a regex_search or a regex_replace, then I get 
>> the following error output when I compile and link (with my compile 
>> line shown first):
>> g++-mp-4.9 -std=c++11 -ggdb test-program.cxx -o test-program
>> Undefined symbols for architecture x86_64:
>> "__istype(int, unsigned long)", referenced from:
>> std::ctype<char>::is(unsigned long, char) const in test-program.o
>> ld: symbol(s) not found for architecture x86_64
>> collect2: error: ld returned 1 exit status
>> Can anyone help me?  I don't know what to do next.
> I don’t know the answer but I Googled the error message and found 
> this post; does that help?
> I’d also ask if you really need to use gcc. Could you use clang 
> instead?

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