[postgis-devel] flex problems on RHEL 5.1
Jorgen Austvik - Sun Norway
Jorgen.Austvik at Sun.COM
Fri Jul 25 05:23:48 PDT 2008
Greg Troxel wrote:
> This might be a difference between traditional BSD flex and GNU flex.
> On my NetBSD 4 system the system flex is 2.5.4, and the man page says
> -ofile, with no space. I also have 2.5.35 installed (the GNU version),
> and that man page says
>
> -o, --outfile=FILE
> specify output filename
>
> which implies that "-o lex.yy.c" or --outfile=lex.yy.c" are ok.
> However, testing GNU flex shows that -ofoo works.
OK, this is Linux:
------------8<------------------8<------------------8<------------------8<------
Red Hat Enterprise Linux Server release 5.1 (Tikanga)
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The man page says:
------------8<------------------8<------------------8<------------------8<------
<snip>
-ooutput
directs flex to write the scanner to the file output
instead of lex.yy.c. If you combine -o
with the -t option, then the scanner is written to
stdout but its #line directives (see the
-L option above) refer to the file output.
<snip>
Version 2.5 April 1995
FLEX(1)
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> Why don't we just accept the default of lex.yy.c and not put it in the
> Makefile at all? Both traditional BSD and GNU flex document that the
> output goes to lex.yy.c.
>
> (In case it's not totally obvious, I recently had flex compatibility
> issues in another area.)
OK, I know very little about it. Getting rid of -o would solve my
problem on RHEL 5.1.
> What version of flex do you have?
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[autopg at frigg24]~/bld/postgis: flex -V
flex version 2.5.4
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-J
--
Jørgen Austvik, Software Engineering - QA
Sun Microsystems Database Group
http://blogs.sun.com/austvik/
http://www.austvik.net/
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