Hi Richard, Thanks for the kind help. On Thu, Aug 25, 2022 at 12:28 PM Richard Earnshaw <Richard.Earnshaw@xxxxxxxxxxxx> wrote: > > > > On 25/08/2022 07:40, Mathieu Malaterre via Gcc-help wrote: > > Hi all, > > > > I am seeing a flood of warnings when compiling openvdb+tbb on Debian/armel: > > > > [...] > > [ 2%] Building CXX object > > openvdb/openvdb/CMakeFiles/openvdb_shared.dir/io/Archive.cc.o > > cd /<<PKGBUILDDIR>>/obj-arm-linux-gnueabi/openvdb/openvdb && > > /usr/bin/c++ -DBOOST_ALL_NO_LIB -DBOOST_IOSTREAMS_DYN_LINK > > -DOPENVDB_DLL -DOPENVDB_PRIVATE -DOPENVDB_USE_LOG4CPLUS > > -Dopenvdb_shared_EXPORTS -I/<<PK > > GBUILDDIR>>/openvdb/openvdb/.. > > -I/<<PKGBUILDDIR>>/obj-arm-linux-gnueabi/openvdb/openvdb > > -I/<<PKGBUILDDIR>>/obj-arm-linux-gnueabi/openvdb/openvdb/openvdb > > -I/<<PKGBUILDDIR>>/openvdb/openvdb/. -I/usr/include/Imat > > h -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong > > -Wformat -Werror=format-security -Wno-psabi -fvisibility=hidden > > -fvisibility-inlines-hidden -Wa,-mimplicit-it=thumb -Wdate-time > > -D_FORTIFY > > _SOURCE=2 -fPIC -std=c++17 -MD -MT > > openvdb/openvdb/CMakeFiles/openvdb_shared.dir/Grid.cc.o -MF > > CMakeFiles/openvdb_shared.dir/Grid.cc.o.d -o > > CMakeFiles/openvdb_shared.dir/Grid.cc.o -c /<<PKGBUILDDIR>>/openvdb/o > > penvdb/Grid.cc > > cd /<<PKGBUILDDIR>>/obj-arm-linux-gnueabi/openvdb/openvdb && > > /usr/bin/c++ -DBOOST_ALL_NO_LIB -DBOOST_IOSTREAMS_DYN_LINK > > -DOPENVDB_DLL -DOPENVDB_PRIVATE -DOPENVDB_USE_LOG4CPLUS > > -Dopenvdb_shared_EXPORTS -I/<<PK > > GBUILDDIR>>/openvdb/openvdb/.. > > -I/<<PKGBUILDDIR>>/obj-arm-linux-gnueabi/openvdb/openvdb > > -I/<<PKGBUILDDIR>>/obj-arm-linux-gnueabi/openvdb/openvdb/openvdb > > -I/<<PKGBUILDDIR>>/openvdb/openvdb/. -I/usr/include/Imat > > h -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong > > -Wformat -Werror=format-security -Wno-psabi -fvisibility=hidden > > -fvisibility-inlines-hidden -Wa,-mimplicit-it=thumb -Wdate-time > > -D_FORTIFY > > _SOURCE=2 -fPIC -std=c++17 -MD -MT > > openvdb/openvdb/CMakeFiles/openvdb_shared.dir/io/Archive.cc.o -MF > > CMakeFiles/openvdb_shared.dir/io/Archive.cc.o.d -o > > CMakeFiles/openvdb_shared.dir/io/Archive.cc.o -c /<<PKGBU > > ILDDIR>>/openvdb/openvdb/io/Archive.cc > > /tmp/ccFlliCl.s: Assembler messages: > > /tmp/ccFlliCl.s:294: Warning: conditional outside an IT block for Thumb. > > /tmp/ccFlliCl.s:338: Warning: conditional outside an IT block for Thumb. > > [...] > > > > There are so many warnings that it eventually times out the compilation. > > > > I could not find a way to tell gcc not to print a warning. Is there a > > way to remove this warning ? > > The warning is coming from the assembler. But I don't think it should > be just 'ignored'. You'll need to track down why it's happening at all. > The most likely case is that there is some inlined assembly code > somewhere that was written on the assumption that the compiler would be > targeting the A32 state rather than the T32 state (thumb), but there's > not enough information here to work out what's happened for sure. > > What we need is a snippet of the assembler output when compiled with > debugging information, so that we can track back to the source code that > is generating this. > > > > > For reference the very large log: > > > > * https://buildd.debian.org/status/fetch.php?pkg=openvdb&arch=armel&ver=9.1.0-4&stamp=1661358853&raw=0 > > > > Thanks much, > > The log isn't much help, it's the contents of the file that's being > assembled that will tell us what we need to know. I did add '-save-temps' to one TU compilation: % cd /home/malat/openvdb-9.1.0/obj-arm-linux-gnueabi/openvdb/openvdb && /usr/bin/c++ -DBOOST_ALL_NO_LIB -DBOOST_IOSTREAMS_DYN_LINK -DOPENVDB_DLL -DOPENVDB_PRIVATE -DOPENVDB_USE_LOG4CPLUS -Dopenvdb_shared_EXPORTS -I/home/malat/openvdb-9.1.0/openvdb/openvdb/.. -I/home/malat/openvdb-9.1.0/obj-arm-linux-gnueabi/openvdb/openvdb -I/home/malat/openvdb-9.1.0/obj-arm-linux-gnueabi/openvdb/openvdb/openvdb -I/home/malat/openvdb-9.1.0/openvdb/openvdb/. -I/usr/include/Imath -g -O2 -ffile-prefix-map=/home/malat/openvdb-9.1.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wno-psabi -fvisibility=hidden -fvisibility-inlines-hidden -Wa,-mimplicit-it=thumb -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -std=c++17 -MD -MT openvdb/openvdb/CMakeFiles/openvdb_shared.dir/io/Compression.cc.o -MF CMakeFiles/openvdb_shared.dir/io/Compression.cc.o.d -o CMakeFiles/openvdb_shared.dir/io/Compression.cc.o -save-temps -c /home/malat/openvdb-9.1.0/openvdb/openvdb/io/Compression.cc Output is: % cd /home/malat/openvdb-9.1.0/obj-arm-linux-gnueabi/openvdb/openvdb && /usr/bin/c++ -DBOOST_ALL_NO_LIB -DBOOST_IOSTREAMS_DYN_LINK -DOPENVDB_DLL -DOPENVDB_PRIVATE -DOPENVDB_USE_LOG4CPLUS -Dopenvdb_shared_EXPORTS -I/home/malat/openvdb-9.1.0/openvdb/openvdb/.. -I/home/malat/openvdb-9.1.0/obj-arm-linux-gnueabi/openvdb/openvdb -I/home/malat/openvdb-9.1.0/obj-arm-linux-gnueabi/openvdb/openvdb/openvdb -I/home/malat/openvdb-9.1.0/openvdb/openvdb/. -I/usr/include/Imath -g -O2 -ffile-prefix-map=/home/malat/openvdb-9.1.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wno-psabi -fvisibility=hidden -fvisibility-inlines-hidden -Wa,-mimplicit-it=thumb -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -std=c++17 -MD -MT openvdb/openvdb/CMakeFiles/openvdb_shared.dir/io/Compression.cc.o -MF CMakeFiles/openvdb_shared.dir/io/Compression.cc.o.d -o CMakeFiles/openvdb_shared.dir/io/Compression.cc.o -save-temps -c /home/malat/openvdb-9.1.0/openvdb/openvdb/io/Compression.cc CMakeFiles/openvdb_shared.dir/io/Compression.cc.s: Assembler messages: CMakeFiles/openvdb_shared.dir/io/Compression.cc.s:146: Warning: conditional outside an IT block for Thumb. CMakeFiles/openvdb_shared.dir/io/Compression.cc.s:162: Warning: conditional outside an IT block for Thumb. CMakeFiles/openvdb_shared.dir/io/Compression.cc.s:215: Warning: conditional outside an IT block for Thumb. CMakeFiles/openvdb_shared.dir/io/Compression.cc.s:330: Warning: conditional outside an IT block for Thumb. CMakeFiles/openvdb_shared.dir/io/Compression.cc.s:344: Warning: conditional outside an IT block for Thumb. CMakeFiles/openvdb_shared.dir/io/Compression.cc.s:352: Warning: conditional outside an IT block for Thumb. CMakeFiles/openvdb_shared.dir/io/Compression.cc.s:598: Warning: conditional outside an IT block for Thumb. CMakeFiles/openvdb_shared.dir/io/Compression.cc.s:768: Warning: conditional outside an IT block for Thumb. CMakeFiles/openvdb_shared.dir/io/Compression.cc.s:934: Warning: conditional outside an IT block for Thumb. [truncated] My gcc version is: % /usr/bin/c++ -v Using built-in specs. COLLECT_GCC=/usr/bin/c++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabi/12/lto-wrapper Target: arm-linux-gnueabi Configured with: ../src/configure -v --with-pkgversion='Debian 12.2.0-1' --with-bugurl=file:///usr/share/doc/gcc-12/README.Bugs --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-12 --program-prefix=arm-linux-gnueabi- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm --disable-libquadmath --disable-libquadmath-support --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-sjlj-exceptions --with-arch=armv5te --with-float=soft --disable-werror --enable-checking=release --build=arm-linux-gnueabi --host=arm-linux-gnueabi --target=arm-linux-gnueabi Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 12.2.0 (Debian 12.2.0-1) *.ii file: https://people.debian.org/~malat/openvdb/Compression.cc.ii.xz Once again thanks again for your time, -- Mathieu
