[Pkg-xen-devel] Bug#812166: xen: FTBFS with GCC 6: statement is indented as if...

[Martin Michlmayr]

Package: xen
Version: 4.6.0-1
Severity: important
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-6 gcc-6-misleading-indentation

This package fails to build with GCC 6.  GCC 6 has not been released
yet, but it's expected that GCC 6 will become the default compiler for
stretch.

Note that only the first error is reported; there might be more.  You
can find a snapshot of GCC 6 in experimental.  To build with GCC 6,
you can set CC=gcc-6 CXX=g++-6 explicitly.

You may be able to find out more about this issue at
https://gcc.gnu.org/gcc-6/changes.html

> sbuild (Debian sbuild) 0.67.0 (26 Dec 2015) on dl580gen9-02.hlinux
...
> gcc -O2 -fomit-frame-pointer -m64 -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes -Wdeclaration-after-statement -Wno-unused-but-set-variable -Wno-unused-local-typedefs   -DNDEBUG -I/<<PKGBUILDDIR>>/debian/build/build-hypervisor_amd64_amd64/xen/include  -I/<<PKGBUILDDIR>>/debian/build/build-hypervisor_amd64_amd64/xen/include/asm-x86/mach-generic -I/<<PKGBUILDDIR>>/debian/build/build-hypervisor_amd64_amd64/xen/include/asm-x86/mach-default -msoft-float -fno-stack-protector -fno-exceptions -Wnested-externs -DHAVE_GAS_VMX -DHAVE_GAS_EPT -DHAVE_GAS_FSGSBASE -mno-red-zone -mno-sse -fpic -fno-asynchronous-unwind-tables -DGCC_HAS_VISIBILITY_ATTRIBUTE -fno-builtin -fno-common -Werror -Wredundant-decls -Wno-pointer-arith -pipe -g -D__XEN__ -include /<<PKGBUILDDIR>>/debian/build/build-hypervisor_amd64_amd64/xen/include/xen/config.h -nostdinc -DCONFIG_SHADOW_PAGING -DHAS_ACPI -DHAS_GDBSX -DHAS_PASSTHROUGH -DHAS_MEM_ACCESS -DHAS_MEM_PAGING -DHAS_MEM_SHARING -DHAS_PCI -DHAS_IOPORT
> S -DHAS_PDX -MMD -MF .non-fatal.o.d -c non-fatal.c -o non-fatal.o
> non-fatal.c: In function 'init_nonfatal_mce_checker':
> non-fatal.c:103:2: error: statement is indented as if it were guarded by... [-Werror=misleading-indentation]
>   switch (c->x86_vendor) {
>   ^~~~~~
> 
> non-fatal.c:97:5: note: ...this 'if' clause, but it is not
>      if ( __get_cpu_var(poll_bankmask) == NULL )
>      ^~
> 
> cc1: all warnings being treated as errors

-- 
Martin Michlmayr
Linux for HPE Helion, Hewlett Packard Enterprise