https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81926
Bug ID: 81926
Summary: go/parse.o differs between stage2 and stage3 for gcc
7.2.0
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
Assignee: ian at airs dot com
Reporter: dclarke at blastwave dot org
CC: cmang at google dot com
Target Milestone: ---
configure ran thus :
$ ../gcc-7.2.0/configure --build=sparc64-sun-solaris2.10 \
--target=sparc64-sun-solaris2.10 \
--host=sparc64-sun-solaris2.10 \
--prefix=/usr/local/gcc7 \
--without-gnu-as --without-gnu-ld \
--with-as=/usr/ccs/bin/as --with-ld=/usr/ccs/bin/sparcv9/ld \
--disable-nls --enable-threads=posix --enable-shared \
--with-gmp=/usr/local --with-mpfr=/usr/local --with-mpc=/usr/local \
--with-isl=/usr/local \
--with-build-time-tools=/usr/local/bin --with-cpu=v9 \
--enable-bootstrap \
--enable-languages=ada,c,c++,fortran,go,objc,obj-c++ \
--with-pkgversion=genunix Tue Aug 22 00:36:56 GMT 2017
This resulted in :
checking build system type... sparc64-sun-solaris2.10
checking host system type... sparc64-sun-solaris2.10
checking target system type... sparc64-sun-solaris2.10
checking for a BSD-compatible install... ../gcc-7.2.0/install-sh -c
checking whether ln works... yes
checking whether ln -s works... yes
checking for a sed that does not truncate output... /usr/local/bin/sed
checking for gawk... /usr/local/bin/gawk
checking for libatomic support... yes
checking for libcilkrts support... yes
checking for libitm support... yes
checking for libsanitizer support... no
checking for libvtv support... no
checking for libmpx support... no
checking for libhsail-rt support... no
checking for sparc64-sun-solaris2.10-gcc... sparc64-sun-solaris2.10-gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether sparc64-sun-solaris2.10-gcc accepts -g... yes
checking for sparc64-sun-solaris2.10-gcc option to accept ISO C89... none
needed
checking for sparc64-sun-solaris2.10-g++... sparc64-sun-solaris2.10-g++
checking whether we are using the GNU C++ compiler... yes
checking whether sparc64-sun-solaris2.10-g++ accepts -g... yes
checking whether g++ accepts -static-libstdc++ -static-libgcc... yes
checking for sparc64-sun-solaris2.10-gnatbind... no
checking for gnatbind... gnatbind
checking for sparc64-sun-solaris2.10-gnatmake... no
checking for gnatmake... gnatmake
checking whether compiler driver understands Ada... yes
checking how to compare bootstrapped objects... cmp $$f1 $$f2 16 16
checking for objdir... .libs
checking for the correct version of gmp.h... yes
checking for the correct version of mpfr.h... yes
checking for the correct version of mpc.h... yes
checking for the correct version of the gmp/mpfr/mpc libraries... yes
checking for isl 0.15 or later... yes
The following languages will be built: c,ada,c++,fortran,go,lto,objc,obj-c++
*** This configuration is not supported in the following subdirectories:
target-libsanitizer target-libvtv target-libmpx target-libhsail-rt
target-liboffloadmic
(Any other directories should still work fine.)
checking for default BUILD_CONFIG...
checking for --enable-vtable-verify... no
checking for bison... bison -y
checking for bison... bison
checking for gm4... /usr/local/bin/m4
checking for flex... flex
checking for flex... flex
checking for makeinfo... makeinfo
checking for expect... expect
checking for runtest... runtest
checking for ar... (cached) /usr/xpg4/bin/ar
checking for sparc64-sun-solaris2.10-ar... (cached) /usr/xpg4/bin/ar
checking for as... (cached) /usr/ccs/bin/as
checking for sparc64-sun-solaris2.10-as... (cached) /usr/ccs/bin/as
checking for sparc64-sun-solaris2.10-dlltool... no
checking for dlltool... no
checking for ld... (cached) /usr/ccs/bin/ld
checking for sparc64-sun-solaris2.10-ld... (cached) /usr/ccs/bin/ld
checking for sparc64-sun-solaris2.10-lipo... no
checking for lipo... no
checking for nm... (cached) /usr/ccs/bin/sparcv9/nm -p
checking for sparc64-sun-solaris2.10-nm... (cached) /usr/ccs/bin/sparcv9/nm -p
checking for ranlib... (cached) /usr/ccs/bin/ranlib
checking for sparc64-sun-solaris2.10-ranlib... (cached) /usr/ccs/bin/ranlib
checking for strip... (cached) /usr/ccs/bin/strip
checking for sparc64-sun-solaris2.10-strip... (cached) /usr/ccs/bin/strip
checking for sparc64-sun-solaris2.10-windres... no
checking for windres... no
checking for sparc64-sun-solaris2.10-windmc... no
checking for windmc... no
checking for sparc64-sun-solaris2.10-objcopy... no
checking for objcopy... no
checking for sparc64-sun-solaris2.10-objdump... no
checking for objdump... no
checking for sparc64-sun-solaris2.10-readelf... no
checking for readelf... no
checking for cc in /usr/local/bin... no
checking for gcc in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-cc... no
checking for cc... cc
checking for c++ in /usr/local/bin... no
checking for g++ in /usr/local/bin... no
checking for cxx in /usr/local/bin... no
checking for gxx in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-c++... sparc64-sun-solaris2.10-c++
checking for gcc in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-gcc... sparc64-sun-solaris2.10-gcc
checking for gfortran in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-gfortran...
sparc64-sun-solaris2.10-gfortran
checking for gccgo in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-gccgo... no
checking for gccgo... no
checking for ar in /usr/local/bin... no
checking for ar... no
checking for ar in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-ar... no
checking for ar... ar
checking for as in /usr/local/bin... no
checking for as... no
checking for as in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-as... no
checking for as... as
checking for dlltool in /usr/local/bin... no
checking for dlltool... no
checking for dlltool in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-dlltool... no
checking for dlltool... no
checking for ld in /usr/local/bin... no
checking for ld... no
checking for ld in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-ld... no
checking for ld... ld
checking for lipo in /usr/local/bin... no
checking for lipo... no
checking for lipo in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-lipo... no
checking for lipo... no
checking for nm in /usr/local/bin... no
checking for nm... no
checking for nm in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-nm... no
checking for nm... nm
checking for objcopy in /usr/local/bin... no
checking for objcopy... no
checking for objcopy in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-objcopy... no
checking for objcopy... no
checking for objdump in /usr/local/bin... no
checking for objdump... no
checking for objdump in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-objdump... no
checking for objdump... no
checking for ranlib in /usr/local/bin... no
checking for ranlib... no
checking for ranlib in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-ranlib... no
checking for ranlib... ranlib
checking for readelf in /usr/local/bin... no
checking for readelf... no
checking for readelf in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-readelf... no
checking for readelf... no
checking for strip in /usr/local/bin... no
checking for strip... no
checking for strip in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-strip... no
checking for strip... strip
checking for windres in /usr/local/bin... no
checking for windres... no
checking for windres in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-windres... no
checking for windres... no
checking for windmc in /usr/local/bin... no
checking for windmc... no
checking for windmc in /usr/local/bin... no
checking for sparc64-sun-solaris2.10-windmc... no
checking for windmc... no
checking where to find the target ar... host tool
checking where to find the target as... host tool
checking where to find the target cc... just compiled
checking where to find the target c++... just compiled
checking where to find the target c++ for libstdc++... just compiled
checking where to find the target dlltool... host tool
checking where to find the target gcc... just compiled
checking where to find the target gfortran... just compiled
checking where to find the target gccgo... just compiled
checking where to find the target ld... host tool
checking where to find the target lipo... host tool
checking where to find the target nm... host tool
checking where to find the target objcopy... host tool
checking where to find the target objdump... host tool
checking where to find the target ranlib... host tool
checking where to find the target readelf... host tool
checking where to find the target strip... host tool
checking where to find the target windres... host tool
checking where to find the target windmc... host tool
checking whether to enable maintainer-specific portions of Makefiles... no
configure: creating ./config.status
config.status: creating Makefile
System is an Oracle SPARC M4000 running Solaris 10 with recent updates applied.
The compiler to be used for the initial stage of bootstrap is gcc 6.4.0 thus :
d$ /usr/local/gcc6/bin/gcc --version
gcc (genunix Wed Jul 26 02:41:24 GMT 2017) 6.4.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
That had reasonable test results previously :
https://gcc.gnu.org/ml/gcc-testresults/2017-07/msg02881.html
The usual GNU tools but not binutils.
The bootstrap halts between stage2 and stage3 with a comparison failure in a
single file :
gmake[2]: Entering directory
'/usr/local/build/gcc-7.2.0_SunOS5.10_sparc64vii+.004'
gmake[3]: Entering directory
'/usr/local/build/gcc-7.2.0_SunOS5.10_sparc64vii+.004'
rm -f stage_current
gmake[3]: Leaving directory
'/usr/local/build/gcc-7.2.0_SunOS5.10_sparc64vii+.004'
Comparing stages 2 and 3
warning: gcc/cc1objplus-checksum.o differs
warning: gcc/cc1obj-checksum.o differs
Bootstrap comparison failure!
gcc/go/parse.o differs
gmake[2]: *** [Makefile:28094: compare] Error 1
gmake[2]: Leaving directory
'/usr/local/build/gcc-7.2.0_SunOS5.10_sparc64vii+.004'
gmake[1]: *** [Makefile:28074: stage3-bubble] Error 2
gmake[1]: Leaving directory
'/usr/local/build/gcc-7.2.0_SunOS5.10_sparc64vii+.004'
gmake: *** [Makefile:28137: bootstrap] Error 2
There seems to be only an 8 byte size difference :
d$ ls -lo ./stage2-gcc/go/parse.o ./stage3-gcc/go/parse.o
-rw-r--r-- 1 dclarke 3904088 Aug 22 04:00 ./stage2-gcc/go/parse.o
-rw-r--r-- 1 dclarke 3904080 Aug 22 04:57 ./stage3-gcc/go/parse.o
Also the various symbols in these object files are identical but the location
of data inside the ELF files is slightly different :
stage 2 :
Section Header[44]: sh_name: .bss
sh_addr: 0 sh_flags: [ SHF_WRITE SHF_ALLOC ]
sh_size: 0x11 sh_type: [ SHT_NOBITS ]
sh_offset: 0x204458 sh_entsize: 0
sh_link: 0 sh_info: 0
sh_addralign: 0x4
stage 3 :
Section Header[44]: sh_name: .bss
sh_addr: 0 sh_flags: [ SHF_WRITE SHF_ALLOC ]
sh_size: 0x11 sh_type: [ SHT_NOBITS ]
sh_offset: 0x204450 sh_entsize: 0
sh_link: 0 sh_info: 0
sh_addralign: 0x4
That sort of difference lay between the two files in many many places.
Slightly different by 8 bytes again however nm tells me that the symbol
listing is identical between the two files. Perhaps there is no actual
"functional" difference between the files at all.
Dennis
