Building RabbitMQ-C on Windows using MinGW - c

Question

Pretty much what the title says. I have been trying to build RabbitMQ under Windows using MinGW with no success. Judging by the amount of people I see asking questions about how to use it, I suspect I am making a silly mistake, but I don't know what it is. I'm on Win7-64 and I'm extracting the repo, creating a build directory in it, and running
cmake -G "MinGW Makefiles" ..
which seems to work, and then
cmake --build .
which throws a bunch of function re declaration errors. Does anybody know what I'm botching here?
Just for good measure, a small sampling of the errors:
Linking C shared library librabbitmq.1.dll
CMakeFiles\rabbitmq.dir/objects.a(amqp_api.c.obj):amqp_api.c:(.rdata+0x3c): mult
iple definition of `amqp_empty_array'
CMakeFiles\rabbitmq.dir/objects.a(amqp_framing.c.obj):amqp_framing.c:(.bss+0x0):
first defined here
CMakeFiles\rabbitmq.dir/objects.a(amqp_api.c.obj):amqp_api.c:(.rdata+0x44): mult
iple definition of `amqp_empty_table'
CMakeFiles\rabbitmq.dir/objects.a(amqp_framing.c.obj):amqp_framing.c:(.bss+0x8):
first defined here
CMakeFiles\rabbitmq.dir/objects.a(amqp_api.c.obj):amqp_api.c:(.rdata+0x4c): mult
iple definition of `amqp_empty_bytes'
CMakeFiles\rabbitmq.dir/objects.a(amqp_framing.c.obj):amqp_framing.c:(.bss+0x10)
: first defined here
CMakeFiles\rabbitmq.dir/objects.a(amqp_connection.c.obj):amqp_connection.c:(.bss
+0x0): multiple definition of `amqp_empty_array'
CMakeFiles\rabbitmq.dir/objects.a(amqp_framing.c.obj):amqp_framing.c:(.bss+0x0):
first defined here
CMakeFiles\rabbitmq.dir/objects.a(amqp_connection.c.obj):amqp_connection.c:(.bss
+0x8): multiple definition of `amqp_empty_table'
CMakeFiles\rlibrabbitmq\CMakeFiles\rabbitmq.dir\build.make:271: recipe for targe
t 'librabbitmq/librabbitmq.1.dll' failed
EDIT:
After some time, I have determined that the problem is that the pre-processor directives have some errors in the way they are written. I'm not going to close this for now, and if I ever get the time to fix the whole thing, I will come back here and leave an answer with a solution.

Answer 1

I've been analyzing macros defined in amqp.h file and I've added the extern modifier to the AMQP_PUBLIC_VARIABLE macro when build a non static library.
78 #elif defined(_WIN32) && defined(__MINGW32__)
79 # if defined(AMQP_BUILD) && !defined(AMQP_STATIC)
80 # define AMQP_PUBLIC_FUNCTION __declspec(dllexport)
81 # define AMQP_PUBLIC_VARIABLE __declspec(dllexport) extern
Another thing was, that I've had to modify the WINVER macro on file '/MinGW/include/windef.h' inside MinGW environment to fit with new windows versions.
11 #ifndef WINVER
12 #define WINVER 0x0501
After that, I've built the librabbitmq.1.dll library without problems using cmake -G "MinGW Makefiles" .. && cmake --build . commands