------- Comment #10 from gcc at abeckmann dot de 2009-10-16 13:11 -------
=== compile command (shows the spurious warning) ===
x86_64-linux-gnu-g++-4.4.x -O2 -W -Wall -DSPURIOUS_WARNING -c
anonymous-iuuitf.cpp
=== ===
=== compile command (no spurious warning) ===
x86_64-linux-gnu-g++-4.4.x -O2 -W -Wall -c anonymous-iuuitf.cpp
=== ===
=== spurious warning reported: ===
anonymous-iuuitf.cpp: In function (static initializers for
anonymous-iuuitf.cpp):
anonymous-iuuitf.cpp:45: warning: <anonymous> is used uninitialized in this
function
=== ===
The spurious warning also occurs with a i686 4.4.x compiler.
It does not happen with 4.3.x or trunk/4.5.x (both x86_64 and i686).
The warning also disappears if optimization is reduced from -O2 to -O1.
=== verbose output ===
$ x86_64-linux-gnu-g++-4.4.x -v -O2 -W -Wall -DSPURIOUS_WARNING -c
anonymous-iuuitf.cpp
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4_4-branch/configure
--prefix=/opt/software/x86_64/gcc-4.4.x --program-suffix=-4.4.x
--enable-languages=c,c++ --enable-checking
Thread model: posix
gcc version 4.4.3 20091016 (prerelease) (GCC)
COLLECT_GCC_OPTIONS='-v' '-O2' '-W' '-Wall' '-DSPURIOUS_WARNING' '-c'
'-shared-libgcc' '-mtune=generic'
/opt/software/x86_64/gcc-4.4.x/libexec/gcc/x86_64-unknown-linux-gnu/4.4.3/cc1plus
-quiet -v -D_GNU_SOURCE -DSPURIOUS_WARNING anonymous-iuuitf.cpp -quiet
-dumpbase anonymous-iuuitf.cpp -mtune=generic -auxbase anonymous-iuuitf -O2 -W
-Wall -version -o /tmp/ccrjG8Y8.s
ignoring nonexistent directory
"/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/4.4.3/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/4.4.3/../../../../include/c++/4.4.3
/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/4.4.3/../../../../include/c++/4.4.3/x86_64-unknown-linux-gnu
/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/4.4.3/../../../../include/c++/4.4.3/backward
/usr/local/include
/opt/software/x86_64/gcc-4.4.x/include
/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/4.4.3/include
/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/4.4.3/include-fixed
/usr/include
End of search list.
GNU C++ (GCC) version 4.4.3 20091016 (prerelease) (x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.3 20091016 (prerelease), GMP version
4.3.1, MPFR version 2.4.1-p2.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 2f5c889faec03641af0e9a45c39b0565
anonymous-iuuitf.cpp: In function (static initializers for
anonymous-iuuitf.cpp):
anonymous-iuuitf.cpp:45: warning: <anonymous> is used uninitialized in this
function
COLLECT_GCC_OPTIONS='-v' '-O2' '-W' '-Wall' '-DSPURIOUS_WARNING' '-c'
'-shared-libgcc' '-mtune=generic'
as -V -Qy -o anonymous-iuuitf.o /tmp/ccrjG8Y8.s
GNU assembler version 2.19.91 (x86_64-linux-gnu) using BFD version (GNU
Binutils for Debian) 2.19.91.20091006
COMPILER_PATH=/opt/software/x86_64/gcc-4.4.x/libexec/gcc/x86_64-unknown-linux-gnu/4.4.3/:/opt/software/x86_64/gcc-4.4.x/libexec/gcc/x86_64-unknown-linux-gnu/4.4.3/:/opt/software/x86_64/gcc-4.4.x/libexec/gcc/x86_64-unknown-linux-gnu/:/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/4.4.3/:/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/
LIBRARY_PATH=/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/4.4.3/:/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/4.4.3/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/opt/software/x86_64/gcc-4.4.x/lib/gcc/x86_64-unknown-linux-gnu/4.4.3/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-O2' '-W' '-Wall' '-DSPURIOUS_WARNING' '-c'
'-shared-libgcc' '-mtune=generic'
=== ===
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40146
