Re: [Mingw-users] regex.h GNU Debian vs. regex.h MinGW

[JonY <10...@gm...>]

Boyd, Todd M. wrote:
> Are there any serious differences between the regex.h/regex.c from GNU
> Linux (particularly Debian, as that is my current distro) and the MinGW
> version of regex.h/regex.c?
>
> I have converted my program to Windows-compatible code, with “#include
> <regex.h>” in the appropriate place, and using the regex_t type does not
> throw any errors, but when I try to compile my source I get the following:
>
> C:\temp>c:\mingw\bin\gcc.exe qcrawl-1.4.c
>
> C:\DOCUME~1\tmboyd1\LOCALS~1\Temp/cc2JieWn.o:qcrawl-1.4.c:(.text+0x43):
> undefined reference to `regcomp'
>
> C:\DOCUME~1\tmboyd1\LOCALS~1\Temp/cc2JieWn.o:qcrawl-1.4.c:(.text+0x64):
> undefined reference to `regcomp'
>
> C:\DOCUME~1\tmboyd1\LOCALS~1\Temp/cc2JieWn.o:qcrawl-1.4.c:(.text+0x97):
> undefined reference to `regfree'
>
> C:\DOCUME~1\tmboyd1\LOCALS~1\Temp/cc2JieWn.o:qcrawl-1.4.c:(.text+0xa3):
> undefined reference to `regfree'
>
> C:\DOCUME~1\tmboyd1\LOCALS~1\Temp/cc2JieWn.o:qcrawl-1.4.c:(.text+0x4d0):
> undefined reference to `regexec'
>
> C:\DOCUME~1\tmboyd1\LOCALS~1\Temp/cc2JieWn.o:qcrawl-1.4.c:(.text+0x63a):
> undefined reference to `regexec'
>
> collect2: ld returned 1 exit status
>
> It’s awful confusing to me, as I see those functions inside the regex.h
> that MinGW uses. I’ve even tried copying regex.h/regex.c into the
> directory I am compiling from and referencing them locally (#include
> “regex.h”), but the same errors happen.

MinGW doesn't have regex, are you sure you're not using a third party regex?

>
> Is there some DLL I need to link to while I’m compiling? I am relatively
> unfamiliar with the linking process, as 99% of the code I have written
> in my life either doesn’t involve anything beyond #includes, or I’ve
> used an IDE that does the linking for me. (For shame, I know… *sniffle*…)
>

Check the MinGW downloads page, there is a regex implementation for 
download.

http://sourceforge.net/project/showfiles.php?group_id=2435

I don't know about IDEs but you should link with libregex.a or use 
"-lregex" if you use GCC to link.

Don't forget to bundle libgnurx-0.dll if you distribute your app.

> Sorry to keep posting to the list about this problematic programming
> experience of mine—but at least I’m back on topic, eh? J
>
> Todd Boyd
>
> Web Programmer
>
>