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Re: [libvirt] Build fails on RHEL-5




Chris Lalancette <clalance redhat com> wrote on 04/05/2010 04:55:10 PM:


>
> On 04/05/2010 04:33 PM, Chris Lalancette wrote:
> > #ifndef ETHERTYPE_IPV6
> > #define ETHERTYPE_IPV6 0x86dd
> > #endif
>
> I did test this quickly, and while this helps, I then run into this
> error:
>
>  gcc -DHAVE_CONFIG_H -I. -I. -I.. -I../gnulib/lib -I../gnulib/lib -
> I../include -I../src/util -I../include -I/usr/include/libxml2 -
> DLIBDIR=\"/usr/local/lib\" -DBINDIR=\"/usr/local/libexec\" -
> DSBINDIR=\"/usr/local/sbin\" -DSYSCONF_DIR=\"/usr/local/etc\" -
> DLOCALEBASEDIR=\"/usr/local/share/locale\" -DPKGDATADIR=\"/usr/
> local/share/libvirt\" -DLOCAL_STATE_DIR=\"/usr/local/var\" -
> DGETTEXT_PACKAGE=\"libvirt\" -Wall -Wformat -Wformat-security -
> Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wextra -
> Wshadow -Wcast-align -Wwrite-strings -Waggregate-return -Wstrict-
> prototypes -Winline -Wredundant-decls -Wno-sign-compare -Wp,-
> D_FORTIFY_SOURCE=2 -fexceptions -fasynchronous-unwind-tables -
> fdiagnostics-show-option -Werror -DIN_LIBVIRT -g -O2 -MT
> libvirt_conf_la-nwfilter_conf.lo -MD -MP -MF .deps/libvirt_conf_la-
> nwfilter_conf.Tpo -c conf/nwfilter_conf.c  -fPIC -DPIC -o .libs/
> libvirt_conf_la-nwfilter_conf.o
> cc1: warnings being treated as errors
> conf/nwfilter_conf.c: In function 'virNWFilterDefParseNode':
> conf/nwfilter_conf.c:1130: warning: 'data_ptr' may be used
> uninitialized in this function
> conf/nwfilter_conf.c:1556: warning: 'found_i' may be used
> uninitialized in this function
> make[3]: *** [libvirt_conf_la-nwfilter_conf.lo] Error 1
>
> It seems like the gcc in RHEL-5 might not be able to figure out that data_ptr
> can never be used uninitialized because it is protected by found.  
> The situation
> with found_i is similar.  Should we set these to default values to
> shut the compiler up?


That's probably the right thing to do.
I'll post a patch shortly.

  Stefan

>
> --
> Chris Lalancette

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