Fail to build with current folly

[hfxunlp]

Some error reported and seems it happened because of folly:
[ 40%] Building CXX object CMakeFiles/thpp.dir/thpp/if/gen-cpp2/Tensor_types.cpp.o
In file included from /usr/local/include/folly/io/async/Request.h:27:0,
from /usr/local/include/folly/io/async/EventBase.h:45,
from /usr/local/include/folly/io/async/AsyncSocketBase.h:19,
from /usr/local/include/folly/io/async/AsyncTransport.h:22,
from /usr/local/include/folly/io/async/AsyncSocket.h:26,
from /usr/local/include/thrift/lib/cpp/async/TAsyncSocket.h:19,
from /usr/local/include/thrift/lib/cpp2/server/Cpp2ConnContext.h:20,
from /home/ano/workspace/thpp/thpp/build/thpp/if/gen-cpp2/Tensor_types.tcc:14,
from /home/ano/workspace/thpp/thpp/build/thpp/if/gen-cpp2/Tensor_types.cpp:9:
/usr/local/include/folly/Synchronized.h:157:37: error: ‘withWLock’ function uses ‘aut’ type specifier without trailing return type
auto withWLock(Function&& function) {
^
/usr/local/include/folly/Synchronized.h:157:37: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:163:39: error: ‘withWLock’ function uses ‘aut’ type specifier without trailing return type
auto withWLock(Function&& function) const {
^
/usr/local/include/folly/Synchronized.h:163:39: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:179:40: error: ‘withWLockPtr’ function uses ‘auto’ type specifier without trailing return type
auto withWLockPtr(Function&& function) {
^
/usr/local/include/folly/Synchronized.h:179:40: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:183:42: error: ‘withWLockPtr’ function uses ‘auto’ type specifier without trailing return type
auto withWLockPtr(Function&& function) const {
^
/usr/local/include/folly/Synchronized.h:183:42: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:194:39: error: ‘withRLock’ function uses ‘aut’ type specifier without trailing return type
auto withRLock(Function&& function) const {
^
/usr/local/include/folly/Synchronized.h:194:39: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:201:42: error: ‘withRLockPtr’ function uses ‘auto’ type specifier without trailing return type
auto withRLockPtr(Function&& function) const {
^
/usr/local/include/folly/Synchronized.h:201:42: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:275:39: error: ‘withULock’ function uses ‘aut’ type specifier without trailing return type
auto withULock(Function&& function) const {
^
/usr/local/include/folly/Synchronized.h:275:39: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:293:40: error: ‘withULockPtr’ function uses ‘auto’ type specifier without trailing return type
auto withULockPtr(Function&& function) {
^
/usr/local/include/folly/Synchronized.h:293:40: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:297:42: error: ‘withULockPtr’ function uses ‘auto’ type specifier without trailing return type
auto withULockPtr(Function&& function) const {
^
/usr/local/include/folly/Synchronized.h:297:42: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:370:36: error: ‘withLock’ function uses ‘auto’ type specifier without trailing return type
auto withLock(Function&& function) {
^
/usr/local/include/folly/Synchronized.h:370:36: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:376:38: error: ‘withLock’ function uses ‘auto’ type specifier without trailing return type
auto withLock(Function&& function) const {
^
/usr/local/include/folly/Synchronized.h:376:38: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:392:39: error: ‘withLockPtr’ function uses ‘auto’ type specifier without trailing return type
auto withLockPtr(Function&& function) {
^
/usr/local/include/folly/Synchronized.h:392:39: note: deduced return type only available with -std=c++14 or -std=gnu++14
/usr/local/include/folly/Synchronized.h:396:41: error: ‘withLockPtr’ function uses ‘auto’ type specifier without trailing return type
auto withLockPtr(Function&& function) const {
^
/usr/local/include/folly/Synchronized.h:396:41: note: deduced return type only available with -std=c++14 or -std=gnu++14
CMakeFiles/thpp.dir/build.make:228: recipe for target 'CMakeFiles/thpp.dir/thpp/if/gen-cpp2/Tensor_types.cpp.o' failed
make[2]: *** [CMakeFiles/thpp.dir/thpp/if/gen-cpp2/Tensor_types.cpp.o] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/thpp.dir/all' failed
make[1]: *** [CMakeFiles/thpp.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make: *** [all] Error 2

[albertyou2]

@anoidgit
hi ,have you found the resolution?I also met the problem and have no idea how to solve it
Need help!

[hfxunlp]

sorry, I still can not install it now. @albertyou2

[albertyou2]

@facebook

[lillekemiker]

Just a thought: have you tried changing this line:
https://github.com/facebook/thpp/blob/master/thpp/CMakeLists.txt#L45
to
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++14")?
(i.e. gnu++14 instead of gnu++11)
I don't know if it will work but it seems worth a shot.

[hfxunlp]

Thank you for your help And I will try after my vocation. @lillekemiker

[albertyou2]

@lillekemiker
I can not make this change "SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++14")" in folly because i did not intend to install folly but 'fblualib' did. When i was runing the install_all.sh which is included in fblualib's project , it clone and install ‘folly’ automatically and the error occurred.

in this case , I do not know how to make "SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++14")" in folly.

Do you have any suggestion? Thank you very much

[goldstar111]

Ok what version of compiler are you using here? I am getting these errors because I am trying with gcc 4.8.5 and I need higher. I just commented it out of the makefile and it proceeded.