GCC does not compile anymore

This is a discussion on GCC does not compile anymore within the Linux Programming forums, part of the Platform Specific Boards category; Hello, I have written 2 programs with GCC and they worked. I upgraded to ubuntu 8.10 and reinstalled code:blocks. Now ...

  1. #1
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    GCC does not compile anymore

    Hello,

    I have written 2 programs with GCC and they worked. I upgraded to ubuntu 8.10 and reinstalled code:blocks. Now i get this message

    Code:
    ||=== GraphVizConverter, Release ===|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp|3|warning: ignoring #pragma warn |
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp||In function ‘std::string filename_(int, std::string)’:|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp|36|error: ‘strlen’ was not declared in this scope|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp||In function ‘void str_print(std::string)’:|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp|47|warning: comparison between signed and unsigned integer expressions|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp||In function ‘void print(std::ofstream&, std::string)’:|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp|95|warning: comparison between signed and unsigned integer expressions|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp||In function ‘void color(std::ofstream&, std::string)’:|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp|109|warning: comparison between signed and unsigned integer expressions|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp||In function ‘void get_all(std::ifstream&)’:|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp|138|error: ‘memcpy’ was not declared in this scope|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp||In function ‘void GrapheViz()’:|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp|320|error: ‘system’ was not declared in this scope|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp||In function ‘int main()’:|
    /home/taghawi/Documents/Thesis/GraphVizConverter Video/GraphVizConverter.cpp|329|error: ‘system’ was not declared in this scope|
    ||=== Build finished: 4 errors, 4 warnings ===|
    What is wrong? How can I fixe this?

    David

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    To use strlen and memcpy, you need #include<cstring>; to use system you need #include <cstdlib>. That shouldn't have compiled previously, I don't think, as C++ (it might have compiled as straight C, except for the std::string part).

  3. #3
    Registered User carrotcake1029's Avatar
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    Seeing as your source files are .cpp, try using g++.

  4. #4
    Captain Crash brewbuck's Avatar
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    Quote Originally Posted by carrotcake1029 View Post
    Seeing as your source files are .cpp, try using g++.
    gcc and g++ can both compile C++ code. The difference between the two comes up during link time.
    Code:
    //try
    //{
    	if (a) do { f( b); } while(1);
    	else   do { f(!b); } while(1);
    //}

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