While trying to build current mainline with Sun as and GNU ld 2.19 on
sparc-sun-solaris2.11, libgomp failed to link with the following error:
/vol/gcc/lib/gld-2.19: gomp_thread_attr: TLS reference in .libs/team.o
mismatches non-TLS reference in .libs/env.o
.libs/team.o: could not read symbols: Bad value
Further investigation revealed that this is due to a gcc bug: consider the
following testcase:
__thread int tsd;
int non_tsd;
[EMAIL PROTECTED] 1510 > ./xgcc -B./ -c ~/tls.c
[EMAIL PROTECTED] 1511 > readelf -s tls.o|grep tsd
3: 00000004 4 TLS GLOBAL DEFAULT COM non_tsd
4: 00000000 4 TLS GLOBAL DEFAULT 2 tsd
[EMAIL PROTECTED] 1512 > /opt/onstudio12/SUNWspro/bin/cc -c ~/tls.c
[EMAIL PROTECTED] 1513 > readelf -s tls.o|grep tsd
9: 00000004 4 TLS GLOBAL DEFAULT COM tsd
10: 00000004 4 OBJECT GLOBAL DEFAULT COM non_tsd
I.e. if compiled with gcc, both objects are marked as tls, while Sun Studio 12
cc correctly only marks tsd as TLS.
The same bug exists in gcc 4.3, 4.2 and 4.1.
--
Summary: gcc emits non-TLS data as TLS on Solaris 11/SPARC
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ro at gcc dot gnu dot org
GCC build triplet: sparc-sun-solaris2.11
GCC host triplet: sparc-sun-solaris2.11
GCC target triplet: sparc-sun-solaris2.11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38118
