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From: "sandmann at daimi dot au dot dk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/39808]  New: warn_unused_result fails to produce warning
Date: Sat, 18 Apr 2009 17:31:00 -0000	[thread overview]
Message-ID: <bug-39808-9875@http.gcc.gnu.org/bugzilla/> (raw)

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The program to be attached produces the warning

[ssp@dhcp-100-2-40 ~]$ gcc gb.c
gb.c: In function ‘main’:
gb.c:11: warning: ignoring return value of ‘foo’, declared with attribute
warn_unused_result

which is expected. However, it should also produce a warning for line 12, which
is exactly the same except a dummy variable is declared.



Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --enable-plugin
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-cpu=generic --build=i386-redhat-linux
Thread model: posix
gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC)


-- 
           Summary: warn_unused_result fails to produce warning
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sandmann at daimi dot au dot dk
 GCC build triplet: i386-redhat-linux
  GCC host triplet: i386-redhat-linux
GCC target triplet: i386-redhat-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39808


             reply	other threads:[~2009-04-18 17:31 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-18 17:31 sandmann at daimi dot au dot dk [this message]
2009-04-18 17:33 ` [Bug c/39808] " sandmann at daimi dot au dot dk
2009-04-21 17:59 ` pinskia at gcc dot gnu dot org
2009-04-22 17:04 ` sandmann at daimi dot au dot dk

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