On 15/03/2021 16.14, Christian Borntraeger wrote:
For some time now I do see the following, when I compile x86-softmmu on s390:
FAILED: libcommon.fa.p/hw_intc_i8259.c.o
cc -Ilibcommon.fa.p -I. -I.. -Iqapi -Itrace -Iui -Iui/shader
-I/usr/include/capstone -I/usr/include/glib-2.0
-I/usr/lib64/glib-2.0/include -I/usr/include/libmount -I/usr/include/blkid
-I/usr/include/gio-unix-2.0 -I/usr/include/libusb-1.0
-I/usr/include/vte-2.91 -I/usr/include/pango-1.0 -I/usr/include/harfbuzz
-I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/fribidi
-I/usr/include/libxml2 -I/usr/include/cairo -I/usr/include/pixman-1
-I/usr/include/gtk-3.0 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/atk-1.0
-I/usr/include/at-spi2-atk/2.0 -I/usr/include/dbus-1.0
-I/usr/lib64/dbus-1.0/include -I/usr/include/at-spi-2.0 -I/usr/include/virgl
-I/usr/include/p11-kit-1 -I/usr/include/SDL2 -I/usr/include/cacard
-I/usr/include/nss3 -I/usr/include/nspr4 -I/usr/include/slirp
-fdiagnostics-color=auto -pipe -Wall -Winvalid-pch -Werror -std=gnu99 -O2 -g
-isystem /home/cborntra/REPOS/qemu/linux-headers -isystem linux-headers
-iquote . -iquote /home/cborntra/REPOS/qemu -iquote
/home/cborntra/REPOS/qemu/include -iquote
/home/cborntra/REPOS/qemu/disas/libvixl -iquote
/home/cborntra/REPOS/qemu/tcg/s390 -iquote
/home/cborntra/REPOS/qemu/accel/tcg -pthread -U_FORTIFY_SOURCE
-D_FORTIFY_SOURCE=2 -m64 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wundef
-Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common
-fwrapv -Wold-style-declaration -Wold-style-definition -Wtype-limits
-Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wempty-body
-Wnested-externs -Wendif-labels -Wexpansion-to-defined
-Wimplicit-fallthrough=2 -Wno-missing-include-dirs -Wno-shift-negative-value
-Wno-psabi -fstack-protector-strong -fPIC -DSTRUCT_IOVEC_DEFINED
-D_REENTRANT -Wno-undef -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600
-DNCURSES_WIDECHAR -MD -MQ libcommon.fa.p/hw_intc_i8259.c.o -MF
libcommon.fa.p/hw_intc_i8259.c.o.d -o libcommon.fa.p/hw_intc_i8259.c.o -c
../hw/intc/i8259.c
../hw/intc/i8259.c: In function ‘pic_read_irq’:
../hw/intc/i8259.c:203:13: error: ‘irq2’ may be used uninitialized in this
function [-Werror=maybe-uninitialized]
203 | irq = irq2 + 8;
| ~~~~^~~~~~~~~~
cc1: all warnings being treated as errors
Due to other compile warnings I find this hard to bisect. Has anyone seen
this as well?
I've never seen this warnings so far... which compiler version is this?
Looking at the code, it seems to be a false positive to me.
Thomas
