Bug#966813: e2fsprogs: FTBFS with GCC 10: multiple definition of ... due to -fno-common

From	Andreas Beckmann <anbe@debian.org>
Newsgroups	linux.debian.bugs.rc
Subject	Bug#966813: e2fsprogs: FTBFS with GCC 10: multiple definition of ... due to -fno-common
Date	2020-08-02 19:30 +0200
Message-ID	<AzpY6-lf-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Source: e2fsprogs
Version: 1.46~WIP.2019.10.03-1
Severity: serious
Tags: ftbfs
Justification: fails to build from source (but built successfully in the past)
User: debian-gcc@lists.debian.org
Usertags: ftbfs-gcc-10

Hi,

e2fsprogs/experimental started to FTBFS when GCC 10 was made the default compiler:

gcc -o tst_libext2fs  -Wl,-z,relro -Wl,-z,now -Wl,-rpath-link,../../lib -DDEBUG debug_cmds.o extent_cmds.o tst_cmds.o debugfs.o util.o ncheck.o icheck.o ls.o lsdel.o dump.o set_fields.o logdump.o htree.o unused.o e2freefrag.o filefrag.o extent_inode.o zap.o xattrs.o quota.o tst_libext2fs.o create_inode.o journal.o revoke.o recovery.o do_journal.o \
        ../../lib/libss.a -ldl ../../lib/libe2p.a  ../../lib/libsupport.a \
        ../../lib/libext2fs.a -lblkid  -luuid  -ldl \
        ../../lib/libcom_err.a -lpthread  -I ../../../../debugfs
/usr/bin/ld: tst_libext2fs.o:./debian/BUILD-STD/lib/ext2fs/../../../../lib/ext2fs/tst_libext2fs.c:33: multiple definition of `extra_cmds'; debugfs.o:./debian/BUILD-STD/lib/ext2fs/../../../../debugfs/debugfs.c:51: first defined here
/usr/bin/ld: tst_libext2fs.o:./debian/BUILD-STD/lib/ext2fs/../../../../lib/ext2fs/tst_libext2fs.c:31: multiple definition of `debug_prog_name'; debugfs.o:./debian/BUILD-STD/lib/ext2fs/../../../../debugfs/debugfs.c:52: first defined here
collect2: error: ld returned 1 exit status

More information about the corresponding GCC change can be found here:
https://gcc.gnu.org/gcc-10/porting_to.html
"Default to -fno-common"


Andreas

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Bug#966813: e2fsprogs: FTBFS with GCC 10: multiple definition of ... due to -fno-common Andreas Beckmann <anbe@debian.org> - 2020-08-02 19:30 +0200
  Bug#966813: e2fsprogs: FTBFS with GCC 10: multiple definition of ... due to -fno-common tytso@mit.edu - 2020-08-02 23:00 +0200

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