Solution: The Coverity Static Code Analyzer was used on libzmq code and found
many issues with uninitialized member variables, some redefinition of variables
hidding previous instances of same variable name and a couple of functions
where return values were not checked, even though all other occurrences were
checked (e.g. init_size() return).

Bump C/C++ standard version support to C11/C++11

Solution: remove it

Solution: bump to C++11 and C11 in autoconf

Solution: use CheckCXXCompilerFlag to check for support for
-std=gnu++11

Solution: import macros to check for compiler options from
autoconf-archive into the m4 subdir.

Precompiled

Problem: tweetnacl gives many warnings on MSVC

Solution: disable the warnings on this file only

We use pragmas wrapped in compiler conditionals. This will need
extending to non-gcc/msvc compilers. We could also fix the warnings
in the code, though I suspect it's not really possible.

Solution: Phase II - made compile using precompiled header

Solution: Phase I - make precompiled.hpp be first file included in every source file

Problem: VC++ gives warnings on inet_addr

Solution: in project.gyp, define _WINSOCK_DEPRECATED_NO_WARNINGS

Deprecate zmq_utils.h

instead of removing it, which breaks downstream builds.

problem: dynamic cast is causing issue when compiling for nodejs

Problem:  Windows build script requires edit for DevStudio version

Solution: Use CMD.EXE environment variable to extract DevStudio version
number and build using it. This even supports machines with multiple
DevStudio versions installed, as long as the build for each version is
done on a separate window with the correct environment.
If multiple version builds are desired from a single CMD.EXE, edit the
buildall.bat file to uncomment the build statements for each specific
version desired.

Number of fixes for gyp builds

Solution: remove it

libzmq used to switch off pedantic checks when using tweetnacl. As
this is now the default, that means pedantic checks are always off.
This is not good.

Solution: in tweetnacl.c alone, use a GCC pragma to disable sign
comparison warnings. We could also clean the code up yet this is
simpler. In other code, we still want those warnings, hence I've
used a pragma rather than global compile option.

Second, use -Wno-long-long all the time, as this warning does not
work with a pragma.

I removed code that set -wno-long-long, for MinGW and Solaris.

Related problem 2: --with-relaxed is badly named

This option switches off pedantic checks, so should be called
--disable-pedantic. 'with' is for optional packages.

Solution: override in project.gyp, for Linux and OS/X.

Gyp needs its own platform.hpp; there is no way to delete this
file automatically.

Solution: copy gyp's platform.hpp into src, so that things build
properly no matter what the starting state. If you build with gyp
and then try to build using autotools' makefile, you'll get an
error from the platform.hpp.

Solution: add .gitignore in builds/gyp

Solution: raise to 16K

Solution: fix in CMakeLists.txt (already fixed in builds/msvc)

Problem: curve keys getsockopt uninitialised read

Solution: always initialised zmq::options_t class variables arrays to
avoid reading uninitialised data when CURVE is not yet configured and
a getsockopt ZMQ_CURVE_{SERVER | PUBLIC | SECRET]KEY is issued.

Various test fixes

Solution: increase SETTLE_TIME from 50ms to 300ms to avoid failing on
slower environments like through Valgrind on slow VMs.

Solution: suggest to use the common approach of msleep (SETTLE_TIME)
after a connect if necessary, rather than reimplementing a different
way.

Solution: include pthread.h in testutil.hpp, removed from
test_shutdown_stress_tipc in an earlier commit

Solution: rename from test_socketopt_hwm to test_sockopt_hwm in
.gitignore too

Solution: add msleep (SETTLE_TIME) to test_immediate, test_spec_rep
and test_spec_router after the sockets are created and connected to
avoid failing when running in slower environment like through
Valgrind in underpowered VMs.

Solution: use msleep (SETTLE_TIME) everywhere when waiting for the
connections/sockets to be settled instead of a variety of patterns
and functions to make tests more coherent.

Solution: memset temporary buffer before use to reduce Valgrind noise

Solution: memset temporary buffer before use to reduce Valgrind noise