Re: Beta release of gawk 3.1.6 now available

[Manuel Collado]

Eli Zaretskii escribió:
> > Date: Thu, 31 May 2007 12:20:16 +0200
> > From: "M. Collado" <address@hidden>
> >
> > This is to report some success in building gawk-3.1.5g on MinGW/Msys.

Well, just "some success". I don't claim to be a GNU porting expert, so 
perhaps there are better ways to build on MinGW. Or it may be that my 
MinGW installation is not enought up to date.

> > Requires a small patch (sorry for not providing a 'patch' file, but it 
> > is really trivial).
>
> Thank you for your report.
>
> > - Add the following section and the end of pc/configure.h'
> > --------------------------------
> > #if defined(__MINGW32__)
> > #undef HAVE_ALLOCA
> > #define HAVE_TMPFILE 1
> > #define restrict    /* nothing */
> > #endif
> > -------------------------------
>
> ??? Can you explain why you need to undef HAVE_TMPFILE and define away
> `restrict'?  You _are_ using GCC, right?  If so, GCC supports both of
> these features.

A) #undef HAVE_ALLOCA
   #define HAVE_TMPFILE 1

Compilation of the distributed sources produced some error messages for 
conditional code sections controled by these switches. I've run 
./configure on MinGW/Msys to check the capabilities of my environment, 
and looked at the generated 'config.h' for the appropriate setting of 
these switches.

B) #define restrict    /* nothing */

The "current" distribution of MinGW provides gcc 3.4.4. It seems not to 
support 'restrict' by default. The -c99 gcc flag lets it to recognize 
the keyword, but then it complains about syntax errors on some source 
files. I've not been able to diagnose these errors, so I simply disabled 
the use of 'restrict'.


Overall, the reported patch is a simple one (just a single small code 
block in a single source file). Can be a workaround until more expert 
MinGW porters find a better solution.

BTW. I wonder why DJGPP and MinGW/Msys are not supported as gawk targets 
the same way as Cygwin. All of them have enought tools to run 
./configure and make.

Regards.
--
Manuel Collado - http://lml.ls.fi.upm.es/~mcollado