You're right, this is a known issue that GOOGLE_PROTOBUF_NO_THREAD_SAFETY
is not currently working: https://github.com/google/protobuf/issues/548
On Wed, Mar 1, 2017 at 4:38 AM, Johan Nilsson <countzero...@gmail.com>
wrote:
> Hi,
>
> I am trying to build protobuf-3.1.0 with the CXXFLAG
> GOOGLE_PROTOBUF_NO_THREAD_SAFETY set.
> Configuring (./configure CXXFLAGS="-DGOOGLE_PROTOBUF_NO_THREAD_SAFETY")
> completes without problem but when running make I get a lot of errors like
> the following:
>
> libtool: compile: g++ -DHAVE_CONFIG_H -I. -I.. -pthread -DHAVE_PTHREAD=1
> -DHAVE_ZLIB=1 -Wall -Wno-sign-compare -DGOOGLE_PROTOBUF_NO_THREAD_SAFETY
> -MT google/protobuf/arena.lo -MD -MP -MF google/protobuf/.deps/arena.Tpo
> -c google/protobuf/arena.cc -fPIC -DPIC -o google/protobuf/.libs/arena.o
> In file included from ./google/protobuf/arena.h:54:0,
> from google/protobuf/arena.cc:31:
> ./google/protobuf/stubs/atomic_sequence_num.h:43:3: error: 'AtomicWord'
> does not name a type
> AtomicWord GetNext() {
> ^
> ./google/protobuf/stubs/atomic_sequence_num.h:47:3: error: 'AtomicWord'
> does not name a type
> AtomicWord word_;
> ^
> ./google/protobuf/stubs/atomic_sequence_num.h: In constructor
> 'google::protobuf::internal::SequenceNumber::SequenceNumber()':
> ./google/protobuf/stubs/atomic_sequence_num.h:41:22: error: class
> 'google::protobuf::internal::SequenceNumber' does not have any field
> named 'word_'
> SequenceNumber() : word_(0) {}
> ^
> In file included from google/protobuf/arena.cc:31:0:
> ./google/protobuf/arena.h: At global scope:
> ./google/protobuf/arena.h:886:31: error: 'AtomicWord' in namespace
> 'google::protobuf::internal' does not name a type
> google::protobuf::internal::AtomicWord blocks_; // Head of linked
> list of all allocated blocks
> ^
> ./google/protobuf/arena.h:887:31: error: 'AtomicWord' in namespace
> 'google::protobuf::internal' does not name a type
> google::protobuf::internal::AtomicWord hint_; // Fast thread-local
> block access
> ^
> ./google/protobuf/arena.h:897:31: error: 'AtomicWord' in namespace
> 'google::protobuf::internal' does not name a type
> google::protobuf::internal::AtomicWord cleanup_list_; // Head of a
> linked list of nodes containing object
> ...
>
> It seems to me that arena (among other things?) ignores the thread safety
> flag.
>
>
> Is the GOOGLE_PROTOBUF_NO_THREAD_SAFETY flag not supported anymore?
>
>
> Regards,
> Johan
>
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