Regexec() & regcomp(). In which library do they reside?

This is a discussion on Regexec() & regcomp(). In which library do they reside? within the C Programming forums, part of the General Programming Boards category; Hi, I'm using the Android NDK to compile some C code however during compile time it complains of undefined references ...

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    Regexec() & regcomp(). In which library do they reside?

    Hi,

    I'm using the Android NDK to compile some C code however during compile time it complains of undefined references to regcomp() and regexec() (Regular expression functions).

    The Android NDK is a stripped down C environment and it's possible these functions are not available but to check this could someone tell me in which library they reside on a standard (Linux) C environment?

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    They are part of POSIX. If the NDK doesn't have the regex.h header you most likely do not have these functions.

    Just a curious question, why doing C development for Android? As far as I know your program will still run under the virtual machine that all programs run on in android, and since java has a much bigger framework it doesn't really make sense for me. Or is it just a matter of doing it to poke around and because it is fun?

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    Quote Originally Posted by Shakti View Post
    They are part of POSIX. If the NDK doesn't have the regex.h header you most likely do not have these functions.

    Just a curious question, why doing C development for Android? As far as I know your program will still run under the virtual machine that all programs run on in android, and since java has a much bigger framework it doesn't really make sense for me. Or is it just a matter of doing it to poke around and because it is fun?
    Hello Shakti,

    Thanks for your quick reply. I did think they should be part of POSIX but I've just discovered that the Android NDK does give me the regex.h and includes the functions I need. Checking the source code I have it appears not to #include regex for some weird reason! (Even though I've compiled this very same code for the build machine ok)

    The reason I'm doing C work for Android is because I need to access some remote devices via a network. Unfortunately the protocol they use is buried in the source code for the Linux drivers and I didn't want the laborious of wading though it to try and work it out. Much better to try and compile what I do have under the android NDK and use that.

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    Is it a linker error or a compiler error you are getting?

    this might shed some light on the issue, it is a little dated but might still be relevant:
    Regular expression support in Android - android-ndk | Google Groups

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    Quote Originally Posted by Shakti View Post
    Is it a linker error or a compiler error you are getting?

    this might shed some light on the issue, it is a little dated but might still be relevant:
    Regular expression support in Android - android-ndk | Google Groups
    Thanks Shakti, that is still relevant. It appears to be a linker error as the modules #including regex.h compile. Anyway I'm trying to just incorporate the missing regex code from OpenBSD as suggested in the link you provided.

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