Re: [Cscope-devel] autoconf setup

[Mike Hopkirk(hops) <ho...@sc...>]

On Wed Apr 26,2000 (01:53:16PM -0700), uz...@li...(Joshua Uziel) wrote:
> * Mike Hopkirk(hops) <ho...@sc...> [000426 13:21]:
> > I downloaded the tarball a coupla hours ago and have been run 
> > testing it on OSr5. 
> > Good job it works pretty well. - No problems with building using lex
> > 
> > with flex however....
> > 
> > On our systems flex gets installed under /usr/local. 
> > The configure run doesn't setup to search there so the yywrap test fails 
> > and -lfl doesn't get added to the build line.
> > 
> > I hand coded round that wiring -L/usr/local/lib for the probe compile
> > but then the build fails cos even tho its been told to use sysvcurses 
> > it picks up the ncurses library (as curses) from /usr/local/lib (:-(
> 
> Hrmm... any you tried doing a "make distclean" and/or killing the
> config.cache?  

yeah - I went through several iterations of that..

> The flex/lex detector is standard with automake,

Yees - looks like its not working for flex lib in a non system location
 I wonder if thats not been an issue for anything else cos they make the 
assumption flex is not available on sco platforms and go explicitly to lex ...


> the curses detection is something I swiped from elsewhere (that was
> also swiped from elsewhere).  Actually, on second thought, yes... I'll
> look at ways of doing that...
> 
> > What I suggest is this:
> > 
> > Can we modify the configure to probe for the existance of the library and 
> > if its not in /lib or /usr/lib add a -L/usr/local/lib to the macro 
> > containing 'fl'
> > (or alternatively add a -L/usr/local/lib regardless on the assumption
> >     that if its not there it'll be found in the course of the normal
> > system places search  .. ?? )
> 
> Sure... I'll see if that's possible...

Can get it to work by setting LEX and LEXLIB explicitly to include
-L/usr/local/lib.. ( that configure test is then skipped)

probably all it needs is a redefinition of 
AC_PROG_LEX in aclocal.m4 such that the 
AC_CHECK_LIB line becomes sommat like

  AC_CHECK_LIB($ac_lib, yywrap, LEXLIB="-L/usr/local/lib -l$ac_lib")



> > In addition change the assembly of the link line so that 
> > LEXLIB is after CURSES_LIBS ( i.e last)
> > 
> > i.e Makefile.{am,in}
> > cscope_LDADD = @LEXLIB@ @CURSES_LIBS@ 
> > becomes 
> > cscope_LDADD = @CURSES_LIBS@ @LEXLIB@
> 
> No problem.
> 
> > Is it possible to get a configure switch specifying which of 
> > flex or lex to use ( for where flex is installed but want to build with lex)
> > (I guess ditto for bison/lex)
>  
> Not sure... you could just "setenv LEX lex" or "setenv YACC yacc"
> to override it... but a --with-lex= would take some work... maybe
> for the future... I don't know how to do it off-hand.

The env variable override works well enough to be going on with ..
 
> > Whats with the SCO_FLAVOR settings in config.h and -D_SVID3 on build line ?
> > Nothing in the sources uses them.
> 
> Those are as a result of the curses stuff I've put in... they're
> there just in case we can use them to our benefit.

I think we can probably dispense with them - if we have a need for
platform tweaks we should probably trigger them individually per
tweak rather than on a platform basis...
 

-- 
- hops

Everything disclaimed (including disclaimer)
------<ho...@sc...>--------------------------------------
Mike Hopkirk (hops)  |       Whenever possible steal code.
SCO Inc              |          Tom Duff. (ex) Bell Labs