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Re: [PATCH v2 4/8] DWARF-5 basic functionality
On Wed, 22 Feb 2017 18:38:11 +0100, Andreas Arnez wrote:
> On Wed, Feb 22 2017, Jan Kratochvil wrote:
>
> > What compiler/version/options do you use? I have tried now
> > gcc-4.8.5-11.el7.x86_64
> > CFLAGS=-O3 CXXFLAGS=-O3 ./configure;make
>
> I saw the warning with an upstream GCC I recently built myself for
> s390x. Today I retried with a fresh version from GCC git, with the same
> result: gcc (GCC) 7.0.1 20170222 (experimental)
g++ (GCC) 7.0.1 20170218 (experimental)
~/redhat/gcchead-root/bin/g++ -m64 -g3 -pipe -Wall -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -fno-diagnostics-show-caret -I. -I. -I./common -I./config -DLOCALEDIR="\"/usr/local/share/locale\"" -DHAVE_CONFIG_H -I./../include/opcode -I./../opcodes/.. -I./../readline/.. -I./../zlib -I../bfd -I./../bfd -I./../include -I../libdecnumber -I./../libdecnumber -I./gnulib/import -Ibuild-gnulib/import -DTUI=1 -I/usr/include/python3.5m -I/usr/include/python3.5m -Wall -Wpointer-arith -Wno-unused -Wunused-value -Wunused-function -Wno-switch -Wno-char-subscripts -Wempty-body -Wunused-but-set-parameter -Wunused-but-set-variable -Wno-sign-compare -Wno-write-strings -Wno-narrowing -Wformat-nonliteral -Werror -c -o dwarf2read.o -MT dwarf2read.o -MMD -MP -MF .deps/dwarf2read.Tpo dwarf2read.c -O3
But on x86_64. I can try building trunk GCC on s390x but do you really have
the warnings unreproducible on x86_64?
> Sure. Unfortunately the maybe-uninitialized warnings highly depend on
> compiler version, platform, optimization level, etc. Since this is a
> false positive, I don't necessarily propose a change in this case.
Also there are already many warnings just with RHEL-7.3 x86_64 GCC for
example.
Jan