Linux build failure

[gandriotakis]

I tried to build POCO 1.4.3 on CentOS using gcc version 4.1.2. The build failed in AtomicCounter.h until I changed the conditional compile condition (__GNUC_MINOR__ >= 1) to (__GNUC_MINOR__ > 1). It was apparently looking for atomic operations that are not available in version 4.1.2.

Is this a known issue?

[gandriotakis]

I see this has already been reported and a similar work around suggested. Is there an intent to correct it in future release?

[alex]

file it in SF tracker and we'll look into it.

[mister]

I have also added this comment to the tracker (but I found this topic under patches not under bugs!)

If you mean errors like:
poco-1.4.3p1/Foundation/testsuite/obj/Linux/i686/debug_shared/ActiveMethodTest.o: In function `Poco::AtomicCounter::operator++()':
poco-1.4.3p1/Foundation/include/Poco/AtomicCounter.h:260: undefined reference to `__sync_add_and_fetch_4'
poco-1.4.3p1/Foundation/testsuite/obj/Linux/i686/debug_shared/ActiveMethodTest.o: In function `Poco::AtomicCounter::operator--()':
poco-1.4.3p1/Foundation/include/Poco/AtomicCounter.h:272: undefined reference to `__sync_sub_and_fetch_4'
poco-1.4.3p1/Foundation/testsuite/obj/Linux/i686/debug_shared/CoreTest.o: In function `Poco::AtomicCounter::operator++(int)':
poco-1.4.3p1/Foundation/include/Poco/AtomicCounter.h:266: undefined reference to `__sync_fetch_and_add_4'
poco-1.4.3p1/Foundation/testsuite/obj/Linux/i686/debug_shared/CoreTest.o: In function `Poco::AtomicCounter::operator--(int)':
poco-1.4.3p1/Foundation/include/Poco/AtomicCounter.h:278: undefined reference to `__sync_fetch_and_sub_4'

you can also solve them by changing build/config/Linux
CXXFLAGS32 = -m32 -march=i686
CXXFLAGS64 = -m64 -march=i686

Don't know which solution is better though

[terrapock]

I'd like to say I have the same problem building poco-1.4.3 on freebsd-7.2 with gcc-4.2.1.

Can I know please:

- that the issue is tracked, e. g., placed in the SF tracker? I tried to search `__sync_sub_and_fetch_4' there without luck.
- that trying to build this with gcc-4.8 will solve this? Or shall I need the different gcc version or other compiler, e. g. CLang?

Trying various *FLAGS for make just doesn't work this out for me.

Thank you.

[gmorehead]

I am attempting to build 1.3.4p1 on the QNX 6.5.0 platform. It has gcc version 4.4.2.

Error:

In function `Poco::AtomicCounter::operator--()':HTTPGetter.cpp:
(.text._ZN4Poco13AtomicCountermmEv[_ZN4Poco13AtomicCountermmEv]+0x15): undefined reference to
`__sync_sub_and_fetch_4'

The rest of the __sync_* functions don't seem to be a problem?

Any ideas?