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Re: [G++ n00b] Include and lib files
From: |
Lionel B |
Subject: |
Re: [G++ n00b] Include and lib files |
Date: |
Mon, 19 Nov 2007 13:16:21 +0000 (UTC) |
User-agent: |
Pan/0.132 (Waxed in Black) |
On Mon, 19 Nov 2007 12:45:35 +0100, Stefan Kristensen wrote:
>>>> #include "mysql/mysql.h"
>>
>> Ah, I think perhaps that should be:
>>
>> #include <mysql/mysql.h>
>
> That doesn't work either. Is there a way to check where g++ looks for
> include files when not using the -I option?
It's actually the preprocessor that does include path processing. The -v
option should tell you the final form of the include path, whether you
specify -I options or not.
Eg. on my system I get:
$ cpp -I/tmp -v
[other stuff]
#include "..." search starts here:
#include <...> search starts here:
/tmp
/usr/local/include
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/include
/usr/include
End of search list.
By the way, earlier you said:
>> Most likely /usr/local/include will be on the include path for your g++
>> by default, so:
>
> It is.
... so how did you know that?
>> You also have to link to the appropriate library(s). Hopefully the docs
>> will tell you how to do that.
>
> Yup. When using -I, -L and -l, everything works.
Note that -I doesn't specify anything about libraries, just included
headers. -l tells the linker which libraries to link to, while -L tells
the linker where to look (besides default locations) for them.
> I'm just a little curious why I have to use the -I option when the
> files are in a standard path?
You shouldn't have to. Perhaps you could post your *exact* compile
command, without -I options, but with -v, and the *complete* output.
Cheers,
--
Lionel B
- [G++ n00b] Include and lib files, Stefan Kristensen, 2007/11/16
- Re: [G++ n00b] Include and lib files, Lionel B, 2007/11/16
- Re: [G++ n00b] Include and lib files, Stefan Kristensen, 2007/11/16
- Re: [G++ n00b] Include and lib files, Stefan Kristensen, 2007/11/16
- Re: [G++ n00b] Include and lib files, Lionel B, 2007/11/19
- Re: [G++ n00b] Include and lib files, Stefan Kristensen, 2007/11/19
- Re: [G++ n00b] Include and lib files,
Lionel B <=
- Re: [G++ n00b] Include and lib files, Stefan Kristensen, 2007/11/19
- Re: [G++ n00b] Include and lib files, Lionel B, 2007/11/19