Re: [kbuild-all] Re: gcc-5: error: -gz is not supported in this configuration

Rong Chen Tue, 09 Jun 2020 18:49:48 -0700



On 6/10/20 8:58 AM, Fangrui Song wrote:

On 2020-06-10, Rong Chen wrote:
On 6/10/20 1:49 AM, Fangrui Song wrote:
On 2020-06-09, Nick Desaulniers wrote:
On Tue, Jun 9, 2020 at 6:12 AM kernel test robot <l...@intel.com>wrote:
tree:https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.gitmaster
head:   abfbb29297c27e3f101f348dc9e467b0fe70f919
commit: 10e68b02c861ccf2b3adb59d3f0c10dc6b5e3ace Makefile: supportcompressed debug info
date:   12 days ago
config: x86_64-randconfig-r032-20200609 (attached as .config)
compiler: gcc-5 (Ubuntu 5.5.0-12ubuntu1) 5.5.0 20171010
reproduce (this is a W=1 build):
        git checkout 10e68b02c861ccf2b3adb59d3f0c10dc6b5e3ace
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):
gcc-5: error: -gz is not supported in this configuration
Hmm...I wonder if the feature detection is incomplete?  I suspect it's
possible to not depend on zlib.
make[2]: *** [scripts/Makefile.build:277: scripts/mod/empty.o]Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [Makefile:1169: prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:185: __sub-make] Error 2
The output of gcc-5 -v --version on that machine may help. The
convoluted gcc_cv_ld_compress_de logic in gcc/configure.ac may be
related, but I can't find any mistake that our
CONFIG_DEBUG_INFO_COMPRESSED conditions may make.
Hi Fangrui,

Here is the output:

$gcc-5 -v --version
Using built-in specs.
COLLECT_GCC=gcc-5
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
gcc-5 (Ubuntu 5.5.0-12ubuntu1) 5.5.0 20171010
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. Thereis NOwarranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULARPURPOSE.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu5.5.0-12ubuntu1'--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ --prefix=/usr--program-suffix=-5 --enable-shared --enable-linker-build-id--libexecdir=/usr/lib --without-included-gettext--enable-threads=posix --libdir=/usr/lib --enable-nls--with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new--enable-gnu-unique-object --disable-vtable-verify --enable-libmpx--enable-plugin --enable-default-pie --with-system-zlib--enable-objc-gc --enable-multiarch --disable-werror--with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32--enable-multilib --with-tune=generic --enable-checking=release--build=x86_64-linux-gnu --host=x86_64-linux-gnu--target=x86_64-linux-gnu
Thread model: posix
gcc version 5.5.0 20171010 (Ubuntu 5.5.0-12ubuntu1)
COLLECT_GCC_OPTIONS='-v' '--version' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1 -quiet -v -imultiarchx86_64-linux-gnu help-dummy -quiet -dumpbase help-dummy-mtune=generic -march=x86-64 -auxbase help-dummy -version --version-fstack-protector-strong -Wformat -Wformat-security -o /tmp/ccqnZumV.sGNU C11 (Ubuntu 5.5.0-12ubuntu1) version 5.5.0 20171010(x86_64-linux-gnu) compiled by GNU C version 5.5.0 20171010, GMP version 6.1.2,MPFR version 4.0.1, MPC version 1.1.0
warning: MPFR header version 4.0.1 differs from library version 4.0.2.
GGC heuristics: --param ggc-min-expand=100 --paramggc-min-heapsize=131072
COLLECT_GCC_OPTIONS='-v' '--version' '-mtune=generic' '-march=x86-64'
 as -v --64 --version -o /tmp/ccRPgs9J.o /tmp/ccqnZumV.s
GNU assembler version 2.34 (x86_64-linux-gnu) using BFD version (GNUBinutils for Ubuntu) 2.34
GNU assembler (GNU Binutils for Ubuntu) 2.34
Copyright (C) 2020 Free Software Foundation, Inc.
This program is free software; you may redistribute it under theterms of
the GNU General Public License version 3 or later.
This program has absolutely no warranty.
This assembler was configured for a target of `x86_64-linux-gnu'.
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '--version' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/collect2 -plugin/usr/lib/gcc/x86_64-linux-gnu/5/liblto_plugin.so-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper-plugin-opt=-fresolution=/tmp/ccJLhs3y.res-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s-plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc-plugin-opt=-pass-through=-lgcc_s --sysroot=/ --build-id--eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed-dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -z now -z relro--version/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crti.o/usr/lib/gcc/x86_64-linux-gnu/5/crtbeginS.o-L/usr/lib/gcc/x86_64-linux-gnu/5-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib-L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu-L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/5/../../../tmp/ccRPgs9J.o -lgcc --push-state --as-needed -lgcc_s --pop-state-lc -lgcc --push-state --as-needed -lgcc_s --pop-state/usr/lib/gcc/x86_64-linux-gnu/5/crtend.o/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crtn.o
collect2 version 5.5.0 20171010
/usr/bin/ld -plugin /usr/lib/gcc/x86_64-linux-gnu/5/liblto_plugin.so-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper-plugin-opt=-fresolution=/tmp/ccJLhs3y.res-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s-plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc-plugin-opt=-pass-through=-lgcc_s --sysroot=/ --build-id--eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed-dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -z now -z relro--version/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crti.o/usr/lib/gcc/x86_64-linux-gnu/5/crtbeginS.o-L/usr/lib/gcc/x86_64-linux-gnu/5-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu-L/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib-L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu-L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/5/../../../tmp/ccRPgs9J.o -lgcc --push-state --as-needed -lgcc_s --pop-state-lc -lgcc --push-state --as-needed -lgcc_s --pop-state/usr/lib/gcc/x86_64-linux-gnu/5/crtend.o/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crtn.o
GNU ld (GNU Binutils for Ubuntu) 2.34
Copyright (C) 2020 Free Software Foundation, Inc.
This program is free software; you may redistribute it under theterms ofthe GNU General Public License version 3 or (at your option) a laterversion.
This program has absolutely no warranty.

Best Regards,
Rong Chen
Hi Rong,

binutils (both GNU as and GNU ld) is new. It oughts to support
--compress-debug-sections=zlib . The failure looks strange to me.

Can you extract the gcc-5 command line building scripts/mod/empty.o
and run it manually?

$ gcc-5 -Wp,-MMD,scripts/mod/.empty.o.d -nostdinc -isystem/usr/lib/gcc/x86_64-linux-gnu/5/include -I./arch/x86/include-I./arch/x86/include/generated -I./include -I./arch/x86/include/uapi-I./arch/x86/include/generated/uapi -I./include/uapi-I./include/generated/uapi -include ./include/linux/kconfig.h -include./include/linux/compiler_types.h -D__KERNEL__ -Wall -Wundef-Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing-fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration-Werror=implicit-int -Wno-format-security -std=gnu89 -mno-sse -mno-mmx-mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1-mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3-mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel-DCONFIG_X86_X32_ABI -Wno-sign-compare -fno-asynchronous-unwind-tables-mindirect-branch=thunk-extern -mindirect-branch-register-fno-jump-tables -fno-delete-null-pointer-checks -Os--param=allow-store-data-races=0 -Wframe-larger-than=2048-fstack-protector-strong -Wno-unused-but-set-variable-fno-omit-frame-pointer -fno-optimize-sibling-calls-fno-var-tracking-assignments -g -gdwarf-4 -femit-struct-debug-baseonly-fno-var-tracking -gz=zlib -Wdeclaration-after-statement -Wvla-Wno-pointer-sign -DKBUILD_MODFILE='"scripts/mod/empty"'-DKBUILD_BASENAME='"empty"' -DKBUILD_MODNAME='"empty"' -c -oscripts/mod/empty.o scripts/mod/empty.c

gcc-5: error: -gz is not supported in this configuration

Also run gcc-5 -g -gz=zlib a.c -c on a trivial file and check whether`readelf -WS a.o`
has the section flag C ("compressed").


$ gcc-5 -g -gz=zlib a.c -c
gcc-5: error: -gz is not supported in this configuration

and no a.o generated.

Best Regards,
Rong Chen

Re: [kbuild-all] Re: gcc-5: error: -gz is not supported in this configuration

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