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Date: Thu, 27 Dec 2001 12:42:39 -0500
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: duplicate regexec/regcomp functions detected
Message-ID: <20011227174239.GA24897@redhat.com>
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References: <20011214113619 DOT J740 AT cygbert DOT vinschen DOT de> <000401c18efb$18115890$0e6307d5 AT BRAMSCHE>
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On Thu, Dec 27, 2001 at 06:22:43PM +0100, Ralf Habacker wrote:
>> -----Original Message-----
>> From: cygwin-owner AT cygwin DOT com [mailto:cygwin-owner AT cygwin DOT com]On Behalf
>> Of Corinna Vinschen
>> Sent: Friday, December 14, 2001 11:36 AM
>> To: cygwin
>> Subject: Re: duplicate regexec/regcomp functions detected
>>
>>
>> On Thu, Dec 13, 2001 at 09:18:39PM +0100, Ralf Habacker wrote:
>> > Hi all,
>> >
>> > kde needs the regexp functions regexec and regcomp.
>> >
>> > The cygwin lib contains the System V8 function call style, while the pcre
>> package (pcreposix)
>> > provides another style (the system V style I guess). The problem is now, that both libs
>> > supports the same names for regexec and regcomp but with different
>> parameter/return types.
>> > This results sometimes in execution failures if the libs are not in the right order like
>> > shown in the following example.
>> >
>> > pcre regexp wanted
>> >
>> > $ gcc ... -lpcreposix -lcygwin   -> okay
>> >
>> > $ gcc ... -lpthreads|-lm|-lc -lpcreposix -lcygwin   -> failure: the functions in
>> cygwin lib
>> > are used
>>
>> But that order should never happen EXCEPT you're making the big
>> mistake to give `-lm' or `-lc' on the command line explicitly.
>> Since -lcygwin is appended automagically and libc.a and libm.a
>> are the same library anyway, the answer is simply, "Don't do that."
>
>This may be for -lm and -lc, but what about libpthread
>
>Think about this link line:
>
>gcc -o test -lpthread main.o [-lcygwin]
>
>This will result in multiple defined symbols for WinMain (expected that
>main.o contains a main function).  You can say don't do this, but what
>about bigger packages like qt.  The qt configuring process does only
>allow like the above link line.

The above link line makes no sense.  It is wrong.  It should be
corrected.

cgf

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