Re: [Qemu-devel] git master build failure

[Andrew Jones]

On Wed, Jun 15, 2016 at 11:08:26AM +0100, Mark Cave-Ayland wrote:
> On 15/06/16 10:48, Andrew Jones wrote:
> 
> > On Wed, Jun 15, 2016 at 08:14:18AM +0100, Mark Cave-Ayland wrote:
> >> Hi Peter,
> >>
> >> Just to let you know that after pulling git master
> >> (49237b856ae58ee7955be0b959c504c51b014f20) I see the following build
> >> failure here:
> > 
> > Just pulled and successfully compiled,
> >   configure --target-list=aarch64-softmmu
> > 
> > And, I'm not sure how it's possible to this warning below. See below
> > 
> >>
> >> cc -I/home/build/src/qemu/git/qemu/tcg
> >> -I/home/build/src/qemu/git/qemu/tcg/i386
> >> -I/home/build/src/qemu/git/qemu/linux-headers
> >> -I/home/build/src/qemu/git/qemu/linux-headers -I.
> >> -I/home/build/src/qemu/git/qemu -I/home/build/src/qemu/git/qemu/include
> >> -I/home/build/src/qemu/git/qemu/hw/arm -Ihw/arm -I/usr/include/pixman-1
> >>   -I/home/build/src/qemu/git/qemu/dtc/libfdt -Werror -m64 -D_GNU_SOURCE
> >> -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes
> >> -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes
> >> -fno-strict-aliasing -fno-common  -Wendif-labels -Wmissing-include-dirs
> >> -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self
> >> -Wignored-qualifiers -Wold-style-declaration -Wold-style-definition
> >> -Wtype-limits -fstack-protector-all -I/usr/include/p11-kit-1
> >> -I/usr/include/libpng12    -I../linux-headers -I..
> >> -I/home/build/src/qemu/git/qemu/target-arm -DNEED_CPU_H
> >> -I/home/build/src/qemu/git/qemu/include -MMD -MP -MT hw/arm/vexpress.o
> >> -MF hw/arm/vexpress.d -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -pthread
> >> -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include
> >> -g   -c -o hw/arm/vexpress.o 
> >> /home/build/src/qemu/git/qemu/hw/arm/vexpress.c
> >> cc -I/home/build/src/qemu/git/qemu/tcg
> >> -I/home/build/src/qemu/git/qemu/tcg/i386
> >> -I/home/build/src/qemu/git/qemu/linux-headers
> >> -I/home/build/src/qemu/git/qemu/linux-headers -I.
> >> -I/home/build/src/qemu/git/qemu -I/home/build/src/qemu/git/qemu/include
> >> -I/home/build/src/qemu/git/qemu/hw/arm -Ihw/arm -I/usr/include/pixman-1
> >>   -I/home/build/src/qemu/git/qemu/dtc/libfdt -Werror -m64 -D_GNU_SOURCE
> >> -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes
> >> -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes
> >> -fno-strict-aliasing -fno-common  -Wendif-labels -Wmissing-include-dirs
> >> -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self
> >> -Wignored-qualifiers -Wold-style-declaration -Wold-style-definition
> >> -Wtype-limits -fstack-protector-all -I/usr/include/p11-kit-1
> >> -I/usr/include/libpng12    -I../linux-headers -I..
> >> -I/home/build/src/qemu/git/qemu/target-arm -DNEED_CPU_H
> >> -I/home/build/src/qemu/git/qemu/include -MMD -MP -MT hw/arm/virt.o -MF
> >> hw/arm/virt.d -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -pthread
> >> -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include
> >> -g   -c -o hw/arm/virt.o /home/build/src/qemu/git/qemu/hw/arm/virt.c
> >> /home/build/src/qemu/git/qemu/hw/arm/virt.c: In function
> >> ‘virt_2_6_class_init’:
> >> /home/build/src/qemu/git/qemu/hw/arm/virt.c:1509:5: error: array
> >> subscript is above array bounds [-Werror=array-bounds]
> > 
> > hw/arm/virt.c:1509 is SET_MACHINE_COMPAT(mc, VIRT_COMPAT_2_6), and
> > VIRT_COMPAT_2_6 is HW_COMPAT_2_6 (which is currently nothing).
> > 
> > SET_MACHINE_COMPAT is
> > 
> > #define SET_MACHINE_COMPAT(m, COMPAT) \
> >     do {                              \
> >         int i;                        \
> >         static GlobalProperty props[] = {       \
> >             COMPAT                              \
> >             { /* end of list */ }               \
> >         };                                      \
> >         if (!m->compat_props) { \
> >             m->compat_props = g_array_new(false, false, sizeof(void *));
> > \
> >         } \
> >         for (i = 0; props[i].driver != NULL; i++) {    \
> >             GlobalProperty *prop = &props[i];          \
> >             g_array_append_val(m->compat_props, prop); \
> >         }                                              \
> >     } while (0)
> > 
> > 
> > so props[] is { {} }, which means props[0].driver == NULL. 0 should
> > be a valid subscript, and we shouldn't try any others.
> > 
> > Are you using special config options or a special compiler?
> > 
> > Thanks,
> > drew
> 
> Hi Andrew,
> 
> Is that from a clean clone of the repository? I wonder if a change to a
> generated file isn't being picked up somewhere by "make distclean". My
> standard build script is this:

Not a clean clone, but a clean build dir. I build in a separate build dir.
mkdir builddir
cd builddir
../srcdir/configure ...
make

> 
> make distclean
> './configure' '--target-list=x86_64-softmmu sparc64-softmmu
> sparc-softmmu ppc-softmmu arm-softmmu' '--disable-pie'

Tried this config and still compiles for me.

> 
> System is standard Debian wheezy on amd64.

For me Fedora22, Intel

Thanks,
drew