[Bug build/11359] New: Build fails: dereferencing pointer '__u' does break strict-aliasing rules

["far at illumenos dot com" <sourceware-bugzilla at sourceware dot org>]

Building GDB 7.0.1 or 7.0.0 with GCC 4.4.3 fails.   I get the following error during the build of bfd.  As 
a simple workaround I removed the -O2 option from bfd/Makefile.

/bin/sh ./libtool --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -DTRAD_CORE   -I. -I. -
I./../include   -DBINDIR='"/usr/bin"'  -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Werror -g 
-O2 -MT archive.lo -MD -MP -MF .deps/archive.Tpo -c -o archive.lo archive.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -DTRAD_CORE -I. -I. -I./../include -DBINDIR=\"/usr/bin\" 
-W -Wall -Wstrict-prototypes -Wmissing-prototypes -Werror -g -O2 -MT archive.lo -MD -MP -MF 
.deps/archive.Tpo -c archive.c -o archive.o
cc1: warnings being treated as errors
archive.c: In function '_bfd_archive_bsd_update_armap_timestamp':
archive.c:2357: error: dereferencing pointer '__u' does break strict-aliasing rules
archive.c:2357: note: initialized from here
archive.c:2357: error: dereferencing pointer '__u' does break strict-aliasing rules
archive.c:2357: note: initialized from here
archive.c:2357: error: dereferencing pointer '__u' does break strict-aliasing rules
archive.c:2357: note: initialized from here
make[4]: *** [archive.lo] Error 1

-- 
           Summary: Build fails: dereferencing pointer '__u' does break
                    strict-aliasing rules
           Product: gdb
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: build
        AssignedTo: unassigned at sourceware dot org
        ReportedBy: far at illumenos dot com
                CC: gdb-prs at sourceware dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://sourceware.org/bugzilla/show_bug.cgi?id=11359

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