Pkg xen devel - Mar 2015 - Bug#778181: Bug#778181: xen: ftbfs with GCC-5

Package: src:xen
Version: 4.4.1-6
Severity: normal
Tags: sid stretch
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-5

Please keep this issue open in the bug tracker for the package it
was filed for.  If a fix in another package is required, please
file a bug for the other package (or clone), and add a block in this
package. Please keep the issue open until the package can be built in
a follow-up test rebuild.

The package fails to build in a test rebuild on at least amd64 with
gcc-5/g++-5, but succeeds to build with gcc-4.9/g++-4.9. The
severity of this report may be raised before the stretch release.

The full build log can be found at:
http://people.debian.org/~doko/logs/gcc5-20150205/xen_4.4.1-6_unstable_gcc5.log
The last lines of the build log are at the end of this report.

To build with GCC 5, either set CC=gcc-5 CXX=g++-5 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t experimental install g++ 

Common build failures are C11 as the default C mode, new warnings
resulting in build failures with -Werror turned on, or new/dropped
symbols in Debian symbols files.  For other C/C++ related build failures
see the porting guide at http://gcc.gnu.org/gcc-5/porting_to.html

[...]
objdump -h reloc.o | sed -n '/[0-9]/{s,00*,0,g;p}' |\
	while read idx name sz rest; do \
		case "$name" in \
		.data|.data.*|.rodata|.rodata.*|.bss|.bss.*) \
			test $sz != 0 || continue; \
			echo "Error: non-empty $name: 0x$sz" >&2; \
			exit $(expr $idx + 1);; \
		esac; \
	done
ld -melf_i386 -N -Ttext 0 -o reloc.lnk reloc.o
objcopy -O binary reloc.lnk reloc.bin
(od -v -t x reloc.bin | tr -s ' ' | awk 'NR > 1 {print s}
{s=$0}' | \
sed 's/ /,0x/g' | sed 's/,0x$//' | sed 's/^[0-9]*,/ .long
/') >reloc.S
make[7]: Leaving directory
'/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/arch/x86/boot'
gcc -D__ASSEMBLY__ -include
/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/include/xen/config.h
-O2 -fomit-frame-pointer -m64 -fno-strict-aliasing -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 -DHAS_ACPI -DHAS_GDBSX -DHAS_PASSTHROUGH -DHAS_PCI -DHAS_IOPORTS -MMD
-MF .head.o.d -c head.S -o head.o
ld    -melf_x86_64  -r -o built_in.o head.o
make[6]: Leaving directory
'/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/arch/x86/boot'
/usr/bin/make -f
/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/Rules.mk -C
/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/arch/x86/efi
built_in.o
make[6]: Entering directory
'/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/arch/x86/efi'
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 -DHAS_ACPI -DHAS_GDBSX -DHAS_PASSTHROUGH -DHAS_PCI -DHAS_IOPORTS -MMD
-MF .boot.o.d -fshort-wchar -DINIT_SECTIONS_ONLY -c boot.c -o boot.o
objdump -h boot.o | sed -n '/[0-9]/{s,00*,0,g;p}' | while read idx name
sz rest; do \
	case "$name" in \
	.text|.text.*|.data|.data.*|.bss) \
		test $sz != 0 || continue; \
		echo "Error: size of boot.o:$name is 0x$sz" >&2; \
		exit $(expr $idx + 1);; \
	esac; \
done
Error: size of boot.o:.text is 0x01e9
make[6]: *** [boot.init.o] Error 1
/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/Rules.mk:174:
recipe for target 'boot.init.o' failed
make[6]: Leaving directory
'/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/arch/x86/efi'
make[5]: ***
[/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/arch/x86/efi/built_in.o]
Error 2
/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/Rules.mk:153:
recipe for target
'/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/arch/x86/efi/built_in.o'
failed
make[5]: Leaving directory
'/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/arch/x86'
make[4]: ***
[/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/xen] Error 2
Makefile:100: recipe for target
'/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen/xen'
failed
make[4]: Leaving directory
'/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen'
make[3]: *** [build] Error 2
Makefile:26: recipe for target 'build' failed
make[3]: Leaving directory
'/??PKGBUILDDIR??/debian/build/build-hypervisor_amd64_amd64/xen'
make[2]: *** [debian/stamps/build-hypervisor_amd64_amd64] Error 2
debian/rules.real:83: recipe for target
'debian/stamps/build-hypervisor_amd64_amd64' failed
make[2]: Leaving directory '/??PKGBUILDDIR??'
make[1]: *** [build-arch_amd64_none_amd64] Error 2
debian/rules.gen:50: recipe for target 'build-arch_amd64_none_amd64'
failed
make[1]: Leaving directory '/??PKGBUILDDIR??'
make: *** [build-arch] Error 2
debian/rules:20: recipe for target 'build-arch' failed
dpkg-buildpackage: error: debian/rules build-arch gave error exit status 2

Control: found -1 4.5.0-1
Control: forwarded -1
http://lists.xen.org/archives/html/xen-devel/2015-03/msg01678.html

On Thu, 2015-02-12 at 10:38 +0000, Matthias Klose wrote:
> Package: src:xen
> Version: 4.4.1-6
FWIW I see exactly the same issue with Xen 4.5.0-1 from experimental the
4.6 development branch upstream, when built with debug=n.

I've asked upstream, I'm not sure if this is a gcc5 issue or not.

Ian.

Processing control commands:
> found -1 4.5.0-1
Bug #778181 [src:xen] xen: ftbfs with GCC-5
Marked as found in versions xen/4.5.0-1.
> forwarded -1
http://lists.xen.org/archives/html/xen-devel/2015-03/msg01678.html
Bug #778181 [src:xen] xen: ftbfs with GCC-5
Set Bug forwarded-to-address to
'http://lists.xen.org/archives/html/xen-devel/2015-03/msg01678.html'.

-- 
778181: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=778181
Debian Bug Tracking System
Contact owner at bugs.debian.org with problems

Control: reassign -1 gcc-5 5-20150205-1

On Fri, 2015-03-13 at 12:04 +0000, Ian Campbell wrote:
> Control: found -1 4.5.0-1
> Control: forwarded -1
http://lists.xen.org/archives/html/xen-devel/2015-03/msg01678.html
> 
> On Thu, 2015-02-12 at 10:38 +0000, Matthias Klose wrote:
> > Package: src:xen
> > Version: 4.4.1-6
> 
> FWIW I see exactly the same issue with Xen 4.5.0-1 from experimental the
> 4.6 development branch upstream, when built with debug=n.
> 
> I've asked upstream, I'm not sure if this is a gcc5 issue or not.
The response, from
http://lists.xen.org/archives/html/xen-devel/2015-03/msg01690.html: 
        they're properly
        annotated. I.e. the compiler forgets to propagate the section
        attribute when generating variants of the functions (e.g. after
        having detected that it always gets called with some argument
        set to some specific value).
        
And then
http://lists.xen.org/archives/html/xen-devel/2015-03/msg01692.html
points to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57725 which does
seem to be correct.

Ian.

Processing control commands:
> reassign -1 gcc-5 5-20150205-1
Bug #778181 [src:xen] xen: ftbfs with GCC-5
Bug reassigned from package 'src:xen' to 'gcc-5'.
No longer marked as found in versions xen/4.5.0-1 and xen/4.4.1-6.
Ignoring request to alter fixed versions of bug #778181 to the same values
previously set
Bug #778181 [gcc-5] xen: ftbfs with GCC-5
Marked as found in versions gcc-5/5-20150205-1.

-- 
778181: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=778181
Debian Bug Tracking System
Contact owner at bugs.debian.org with problems