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POG++ not finding symbols from regex system header
 

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  1. POG++ not finding symbols from regex system header
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    <p>I am trying to use the GNU C library regex functionality in my C++ project, particularly I'm trying to use the regex_t regcomp, regexec, regfree functions. Upon compilation I get errors stating that these symbols are undefined:</p> <pre><code>me&gt; g++ -I/me/myheaders/ -c RootGenerator.cpp -o RootGenerator.o -std=gnu++0x -Wall RootGenerator.cpp: In function ‘std::string findFirstFileInCurrentDirectory(std::string)’: RootGenerator.cpp:1072: error: ‘regex_t’ was not declared in this scope RootGenerator.cpp:1072: error: expected ‘;’ before ‘re’ RootGenerator.cpp:1073: error: ‘re’ was not declared in this scope RootGenerator.cpp:1073: error: ‘REG_EXTENDED’ was not declared in this scope RootGenerator.cpp:1073: error: ‘REG_NOSUB’ was not declared in this scope RootGenerator.cpp:1073: error: ‘regcomp’ was not declared in this scope RootGenerator.cpp:1074: error: expected ‘;’ before ‘int’ RootGenerator.cpp:1084: error: ‘status’ was not declared in this scope RootGenerator.cpp:1084: error: ‘regexec’ was not declared in this scope RootGenerator.cpp:1092: error: ‘REG_NOMATCH’ was not declared in this scope RootGenerator.cpp:1108: error: ‘regfree’ was not declared in this scope </code></pre> <p>I realize that the regex header is a TR1 implementation and is therefore experimental for my version of GCC. I added the <code>-std=gnu++0x</code> compiler option according to the compiler warning recieved when first trying to compile but this doesn't seem to fix the issue. Is this an issue of the system not recognizing and adding paths to "experimental" headers? Are there additional include paths or compiler options that I need to specify?</p> <p>As an additional note, I noticed in Eclipse/CDT that under the "includes" tab in the Project Explorer view, it shows a list of the system header paths. It lists many header files under the /user/include/c++/4.4.4 path tab, but It doesn't list the regex header. I think this is also reaffirming that there is a setting issue.</p>
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    1. USJonnyB
    1. USJonnyB
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    1. COJust a sanity check; your source file is definitely #including the relevant header?
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      1. POG++ not finding symbols from regex system header
      1. USOliver Charlesworth
    2. COWhen it comes to regex, a lot is missing> http://stackoverflow.com/questions/12530406/is-gcc4-7-buggy-about-regular-expressions http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2011
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      1. POG++ not finding symbols from regex system header
      1. USJohan Lundberg
    3. COYeah, GCC hasn't implemented `<regex>` yet.
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      1. POG++ not finding symbols from regex system header
      1. USchris
 

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