http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57267
Bug ID: 57267
Summary: [4.9 regression] -flto-partition=none : symbol is
already defined
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: dimhen at gmail dot com
198366 PASS
198828 FAIL
$ g++ -fpreprocessed -flto -c a.ii -o a.o
$ g++ -fpreprocessed -flto -c b.ii -o b.o
$ g++ -shared a.o b.o -O -flto -flto-partition=none -o x.so
/tmp/ccozW37q.s: Assembler messages:
/tmp/ccozW37q.s:16: Error: symbol `_ZL28__gthrw___pthread_key_createPjPFvPvE'
is already defined
lto-wrapper: g++ returned 1 exit status
/usr/bin/ld: fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status
$ cat a.ii
void pthread_key_create (unsigned *, void (void *));
static __typeof pthread_key_create __gthrw___pthread_key_create
__attribute__ ((__weakref__ ("__pthread_key_create")));
void *a = (void *) &__gthrw___pthread_key_create;
$ cat b.ii
void pthread_key_create (unsigned *, void (void *));
static __typeof pthread_key_create __gthrw___pthread_key_create
__attribute__ ((__weakref__ ("__pthread_key_create")));
void *__exchange_and_add_dispatch___gthread_active_ptr =
(void *) &__gthrw___pthread_key_create;
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/dimhen/src/gcc-current/configure
--prefix=/usr/local/gcc_current --with-multilib-list=m64 --enable-__cxa_atexit
--enable-shared --enable-checking=yes,df,fold,rtl,tree
--enable-gnu-unique-object --enable-linker-build-id
--enable-languages=c,c++,lto --enable-plugin --with-tune=native
--with-march=native --enable-version-specific-runtime-libs
Thread model: posix
gcc version 4.9.0 20130513 (experimental) [trunk revision 198828] (GCC)
