Re: [LTP] cap_bset_inh_bounds.c build failure

["Serge E. Hallyn" <serue@us.ibm.com>]

Quoting Mitani (mitani@ryobi.co.jp):
> Hi,
> 
> > -----Original Message-----
> > From: Serge E. Hallyn [mailto:serue@us.ibm.com]
> > Sent: Monday, April 05, 2010 10:22 PM
> > To: Mitani
> > Cc: ltp-list@lists.sourceforge.net
> > Subject: Re: [LTP] cap_bset_inh_bounds.c build failure
> > 
> > Quoting Mitani (mitani@ryobi.co.jp):
> > > Hi,
> > >
> > > I tried to build by using yesterday's git in my system (RHEL4.8 x86).
> > >  (ltp-dev-4837fee8a7c2de6a83c8927a574c792ca6dabe4e.tar.gz)
> > > But build failed in "cap_bset_inh_bounds.c" with following message.
> > > This is different from "cap_bounds_r.c"'s problem (another thread),
> > I think
> > >
> > > ------------
> > > gcc -g -O2 -g -O2 -fno-strict-aliasing -pipe -Wall
> > > -I/home/LTP/ltp-dev-20100401-3/testcases/kernel/include
> > > -I../../../../include -I../../../../include   -L../../../../lib
> > > cap_bset_inh_bounds.c   -lltp -lcap -o cap_bset_inh_bounds
> > > cap_bset_inh_bounds.c:124: error: syntax error before numeric
> > constant
> > > cap_bset_inh_bounds.c:124: warning: type defaults to `int' in
> > declaration of
> > > `tst_resm'
> > > cap_bset_inh_bounds.c:124: error: conflicting types for 'tst_resm'
> > > ../../../../include/test.h:192: error: previous declaration of
> > 'tst_resm'
> > > was here
> > > cap_bset_inh_bounds.c:124: error: conflicting types for 'tst_resm'
> > > ../../../../include/test.h:192: error: previous declaration of
> > 'tst_resm'
> > > was here
> > > cap_bset_inh_bounds.c:124: warning: data definition has no type or
> > storage
> > > class
> > > cap_bset_inh_bounds.c:129: warning: type defaults to `int' in
> > declaration of
> > > `tst_exit'
> > > cap_bset_inh_bounds.c:129: error: conflicting types for 'tst_exit'
> > > ../../../../include/test.h:203: error: previous declaration of
> > 'tst_exit'
> > > was here
> > > cap_bset_inh_bounds.c:129: error: conflicting types for 'tst_exit'
> > > ../../../../include/test.h:203: error: previous declaration of
> > 'tst_exit'
> > > was here
> > > cap_bset_inh_bounds.c:129: warning: data definition has no type or
> > storage
> > > class
> > > cap_bset_inh_bounds.c:130: error: syntax error before '}' token
> > > ------------
> > >
> > > In this source, the pair of "ifdef" start/end and the pair of
> > > main() function's "parenthesis" are alternate, I think.
> > >
> > >
> > > How about following patch?
> > >
> > > Signed-off-by : Tomonori Mitani <mitani@ryobi.co.jp>
> > 
> > Yup - although really the #ifdef HAVE_LIBCAP should be redundant as
> > the testcases/kernel/security/cap_bound/Makefile shouldn't compile
> > cap_bounds at all if HAVE_LIBCAP is not defined.
> > 
> 
> Yes. - In my system, this source is not problem. Your indication is 
> right. :-)
> But, I manually had updated "libcap2" once. And after "./configure", 
> HAVE_LIBCAP is defined. Therefore, I noticed this error.
> 
> The system which updated to "libcap2" will need solution of this 
> problem, I think.

Agreed, since this is LTP it's not right to expect "sane"
userspace-kernel combos.  So we need to check both.  Unfortunately
I won't have time to work with that this week.

Even if I did, I'd have a guidance question for Garrett:  Do we
want to assume that people will change kernels, but not libraries,
between compile/install and run of ltp?  If so, then we can stick
with the autoconf checks for libraries+includes, and add a check
at runtime (as I believe was there originally) for the requisite
kernel support - file capabilities, bounding sets, and 64-bit
capabilities.

OTOH if you're ok with assuming kernel is same at ltp configure
and run, then we can do a test in autoconf which makes for a cleaner
run.

thanks,
-serge

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