at least at every recent hardened Gentoo Linux tinderbox image
Error example is: cc -o mail version.o aux.o cmd1.o cmd2.o cmd3.o cmdtab.o collect.o edit.o fio.o getname.o head.o v7.local.o lex.o list.o main.o names.o popen.o quit.o send.o strings.o temp.o tty.o vars.o -llockfile -lbsd /usr/lib/gcc/x86_64-pc-linux-gnu/10.0.0-pre9999/../../../../x86_64-pc-linux-gnu/bin/ld: cmd1.o:/tmp/portage/mail-client/mailx-8.1.2.20160123/work/bsd-mailx-8.1.2-0.20160123cvs.orig/glob.h:77: multiple definition of `screenheight'; aux.o:/tmp/portage/mail-client/mailx-8.1.2.20160123/work/bsd-mailx-8.1.2-0.20160123cvs.orig/glob.h:77: first defined here /usr/lib/gcc/x86_64-pc-linux-gnu/10.0.0-pre9999/../../../../x86_64-pc-linux-gnu/bin/ld: cmd1.o:/tmp/portage/mail-client/mailx-8.1.2.20160123/work/bsd-mailx-8.1.2-0.20160123cvs.orig/glob.h:66: multiple definition of `message'; aux.o:/tmp/portage/mail-client/mailx-8.1.2.20160123/work/bsd-mailx-8.1.2-0.20160123cvs.orig/glob.h:66: first defined here
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f679322d6a5f44a6a7ba34c379d01737315022fc commit f679322d6a5f44a6a7ba34c379d01737315022fc Author: Jeroen Roovers <jer@gentoo.org> AuthorDate: 2020-04-22 07:22:08 +0000 Commit: Jeroen Roovers <jer@gentoo.org> CommitDate: 2020-04-22 07:23:24 +0000 mail-client/mailx: Version 8.1.2.20180807 - New Debian patchset - Fix building with CFLAGS=-fno-common Package-Manager: Portage-2.3.99, Repoman-2.3.22 Closes: https://bugs.gentoo.org/706258 Signed-off-by: Jeroen Roovers <jer@gentoo.org> mail-client/mailx/Manifest | 2 + .../files/mailx-8.1.2.20180807-fno-common.patch | 156 +++++++++++++++++++++ mail-client/mailx/mailx-8.1.2.20180807.ebuild | 56 ++++++++ 3 files changed, 214 insertions(+)