Date: Sat, 05 Jan 2019 05:12:11 +0000 From: bugzilla-noreply@freebsd.org To: gnome@FreeBSD.org Subject: [Bug 220103] devel/glib20: ld-elf.so.1: /usr/local/lib/libglib-2.0.so.0: Undefined symbol "environ" (WITH_LLD_IS_LD) Message-ID: <bug-220103-6497-o53mwfyN33@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-220103-6497@https.bugs.freebsd.org/bugzilla/> References: <bug-220103-6497@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D220103 --- Comment #24 from Michal Meloun <mmel@FreeBSD.org> --- (In reply to Dimitry Andric from comment #23) I was too brief, sorry.=20 'environ' symbol is exported from /lib/crt1.o with *global* binding: # readelf -s /usr/lib/crt1.o | grep environ 46: 0000000000000008 8 OBJECT GLOBAL DEFAULT COM environ And it's referenced (not only) from /lib/libc: # readelf -s /lib/libc.so.7 | grep environ 3: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND environ For final mplayer link, following command is issued: 'ld =E2=80=A6 --version-script binary.ver /usr/lib/crt1.o =E2=80=93lc =E2= =80=A6' where linker script binary.ver is: MPLAYER_1 { # to support glibcs abhorrent backwards-compatibility hack global: _IO_stdin_used; local: *; }; This script changes binding of all (but _IO_stdin_used) symbols exported by mplayer from *global* to *local*, including =E2=80=98environ=E2=80=99 symbo= l from linked in crt1.o. Due to this, 'environ' becomes invisible to other DSO (libc..). So resulting binary is invalid, it cannot be run-time loaded and linker should report this issue. Everything above is also valid for '__progname' symbol. Actual ld.bfd (2.30, from binutils) correctly report this problem and rejec= t to build invalid binary: /usr/bin/ld: mplayer: local symbol '__progname' in /usr/lib/crt1.o is referenced by DSO But ld.lld(7.0.1) doesn't and silently produces invalid binary. The lack of error report and unloadable binary is, imho, evident ld.lld bug. I can prepare trivial testcase for this, if you want it. --=20 You are receiving this mail because: You are on the CC list for the bug.=
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