Your message dated Tue, 20 Sep 2016 22:15:11 +0000 with message-id <[email protected]> and subject line Bug#838316: Removed package(s) from unstable has caused the Debian Bug report #786883, regarding gcc-4.9: --sysroot=... not properly respected - /usr/lib still stays in library search path to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 786883: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=786883 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: gcc-4.9 Version: 4.9.2-18 Severity: normal Dear Maintainer, I'm trying to re-prefix gcc at runtime and found that --sysroot option is not properly respected - /usr/lib/ still stays in ld search path. Here is an example $ pwd /home/kirr/tmp/gcc-sysroot # NOTE - non / nor /usr/... $ mkdir root # NOTE it will stay _empty_ $ cat prog.c # test program to compile/link int main() { return 0; } $ gcc --sysroot=`pwd`/root prog.c # NOTE links ok. But it should $ echo $? # complain that it cannot find 0 # e.g. crt1.o # like e.g. gcc-snapshot is complaining $ /usr/lib/gcc-snapshot/bin/gcc --sysroot=`pwd`/root prog.c /usr/bin/ld: cannot find crt1.o: No such file or directory /usr/bin/ld: cannot find crti.o: No such file or directory collect2: error: ld returned 1 exit status # though without --sysroot gcc-snapshot builds it ok: $ /usr/lib/gcc-snapshot/bin/gcc prog.c $ echo $? 0 I've investigated a bit with `gcc -v`: $ gcc -v --sysroot=`pwd`/root prog.c Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.9/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.9.2-18' --with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.9 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.9 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --with-arch-32=i586 -- 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 4.9.2 (Debian 4.9.2-18) COLLECT_GCC_OPTIONS='-v' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-linux-gnu/4.9/cc1 -quiet -v -imultiarch x86_64-linux-gnu -isysroot /home/kirr/tmp/gcc-sysroot/root prog.c -quiet -dumpbase prog.c -mtune=generic -march=x86-64 -auxbase prog -version -o /tmp/cc7D9nYw.s GNU C (Debian 4.9.2-18) version 4.9.2 (x86_64-linux-gnu) compiled by GNU C version 4.9.2, GMP version 6.0.0, MPFR version 3.1.2-p11, MPC version 1.0.3 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 ignoring nonexistent directory "/home/kirr/tmp/gcc-sysroot/root/usr/local/include/x86_64-linux-gnu" ignoring nonexistent directory "/home/kirr/tmp/gcc-sysroot/root/usr/local/include" ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../x86_64-linux-gnu/include" ignoring nonexistent directory "/home/kirr/tmp/gcc-sysroot/root/usr/include/x86_64-linux-gnu" ignoring nonexistent directory "/home/kirr/tmp/gcc-sysroot/root/usr/include" #include "..." search starts here: #include <...> search starts here: /usr/lib/gcc/x86_64-linux-gnu/4.9/include /usr/lib/gcc/x86_64-linux-gnu/4.9/include-fixed End of search list. GNU C (Debian 4.9.2-18) version 4.9.2 (x86_64-linux-gnu) compiled by GNU C version 4.9.2, GMP version 6.0.0, MPFR version 3.1.2-p11, MPC version 1.0.3 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 514e8e7b9ffc2d28024c8135005ee4c0 COLLECT_GCC_OPTIONS='-v' '-mtune=generic' '-march=x86-64' as -v --64 -o /tmp/ccvJZhce.o /tmp/cc7D9nYw.s GNU assembler version 2.25 (x86_64-linux-gnu) using BFD version (GNU Binutils for Debian) 2.25 COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.9/:/usr/lib/gcc/x86_64-linux-gnu/4.9/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.9/:/usr/lib/gcc/x86_64-linux-gnu/ LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.9/:/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../lib/:/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../ COLLECT_GCC_OPTIONS='-v' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-linux-gnu/4.9/collect2 -plugin /usr/lib/gcc/x86_64-linux-gnu/4.9/liblto_plugin.so -plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/4.9/lto-wrapper -plugin-opt=-fresolution=/tmp/ccLSDzrV.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=/home/kirr/tmp/gcc-sysroot/root --build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu -dynamic-linker /lib64/ld-linux-x86-64.so.2 /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crt1.o /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/4.9/crtbegin.o -L/usr/lib/gcc/x86_64-linux-gnu/4.9 -L/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../lib -L/usr/lib/gcc/x86_64-linux-gnu/4.9/../../.. /tmp/ccvJZhce.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed / usr/lib/gcc/x86_64-linux-gnu/4.9/crtend.o /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crtn.o and the reason for not dropping /usr/lib , it seems, is because of e.g. /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crt1.o (realpath = /usr/lib/x86_64-linux-gnu/crt1.o) being used as C-runtime support from libc, and then internally gcc for %D in it's spec "Dump out a -L option for each directory in startfile_prefixes": https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/gcc.c;h=c7ce64d8fc864c2f8cf46269e020b86b637437ff;hb=b7c27a04cdf50ecaedd163a06b12c9d8753357aa#l379 and %D is used for link_linkgcc: $ gcc -dumpspecs |grep -A2 '^\*link_libgcc' *link_libgcc: %D so it looks like it picks up /usr/lib/x86_64-linux-gnu/crt1.o (maybe correct) and then whenever libgcc should be linked in (almost always) adds -L/usr/lib/x86_64-linux-gnu in correspondence to it (wrong). ... which breaks sysroot promise - we can (unintentionally) link with system libraries besides libc installed in /usr - look e.g.: $ gcc --sysroot=`pwd`/root prog.c -lcrypto /usr/bin/ld: warning: libdl.so.2, needed by /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libcrypto.so, not found (try using -rpath or -rpath-link) /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libcrypto.so: undefined reference to `dlopen@GLIBC_2.2.5' /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libcrypto.so: undefined reference to `dlerror@GLIBC_2.2.5' /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libcrypto.so: undefined reference to `dlclose@GLIBC_2.2.5' /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libcrypto.so: undefined reference to `dlsym@GLIBC_2.2.5' /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libcrypto.so: undefined reference to `dladdr@GLIBC_2.2.5' collect2: error: ld returned 1 exit status it picks up /usr/lib/x86_64-linux-gnu/libcrypto.so ! (= realpath /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libcrypto.so) the compilation failed just by luck, for some reason, but it succeeds with both -lcrypto -ldl: $ gcc --sysroot=`pwd`/root prog.c -lcrypto -ldl $ echo $? 0 and both libraries were picked from /usr/lib/x86_64-linux-gnu because root/ is completely _empty_ ! ~~~~ I guess gcc-snapshot succeeds not because the bug was fixed, but because it is maybe configured at different-than /usr prefix (/usr/lib/gcc-snapshot) - because I've tried to compile gcc-4_9-branch manually, with also different-from-usr prefix, and that manually compiled gcc respects --sysroot ok. With this situation, when standard search paths are still being used, it is not possible to rely on --sysroot promise: ---- 8<---- from gcc(1) --sysroot=dir Use dir as the logical root directory for headers and libraries. For example, if the compiler normally searches for headers in /usr/include and libraries in /usr/lib, it instead searches dir/usr/include and dir/usr/lib. I would appreciate, if it possible to fix. Thanks beforehand, Kirill P.S. $ /usr/lib/gcc-snapshot/bin/gcc --version gcc (Debian 20150516-1) 6.0.0 20150516 (experimental) [trunk revision 223239] Copyright (C) 2015 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. -- System Information: Debian Release: stretch/sid APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores) Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Init: systemd (via /run/systemd/system) Versions of packages gcc-4.9 depends on: ii binutils 2.25-7 ii cpp-4.9 4.9.2-18 ii gcc-4.9-base 4.9.2-18 ii libc6 2.19-18 ii libcloog-isl4 0.18.3-1 ii libgcc-4.9-dev 4.9.2-18 ii libgmp10 2:6.0.0+dfsg-6 ii libisl13 0.14-2 ii libmpc3 1.0.3-1 ii libmpfr4 3.1.2-3 ii zlib1g 1:1.2.8.dfsg-2+b1 Versions of packages gcc-4.9 recommends: ii libc6-dev 2.19-18 Versions of packages gcc-4.9 suggests: ii gcc-4.9-doc 4.9.2-2 pn gcc-4.9-locales <none> ii gcc-4.9-multilib 4.9.2-18 pn libasan1-dbg <none> pn libatomic1-dbg <none> pn libcilkrts5-dbg <none> ii libgcc1-dbg 1:5.1.1-7 pn libgomp1-dbg <none> pn libitm1-dbg <none> pn liblsan0-dbg <none> pn libquadmath0-dbg <none> pn libtsan0-dbg <none> pn libubsan0-dbg <none> -- no debconf information
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--- Begin Message ---Version: 4.9.4-2+rm Dear submitter, as the package gcc-4.9 has just been removed from the Debian archive unstable we hereby close the associated bug reports. We are sorry that we couldn't deal with your issue properly. For details on the removal, please see https://bugs.debian.org/838316 The version of this package that was in Debian prior to this removal can still be found using http://snapshot.debian.org/. This message was generated automatically; if you believe that there is a problem with it please contact the archive administrators by mailing [email protected]. Debian distribution maintenance software pp. Chris Lamb (the ftpmaster behind the curtain)
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