Installing libmodbus using Cygwin

[xristosx]

I am trying to install libmodbus v 3.0.6 on a Windows 8.1 machine, using Cygwin.
and I am getting the following error when I type "make":
..................................................................................................................................................
configure: WARNING: winsock2.h: present but cannot be compiled
configure: WARNING: winsock2.h: check for missing prerequisite headers?
configure: WARNING: winsock2.h: see the Autoconf documentation
configure: WARNING: winsock2.h: section "Present But Cannot Be Compiled"
configure: WARNING: winsock2.h: proceeding with the compiler's result
configure: WARNING: ## ----------------------------------------------------- ------ ##
configure: WARNING: ## Report this to https://github.com/stephane/libmodbus/ issues ##
configure: WARNING: ## ----------------------------------------------------- ------ ##
checking for winsock2.h... no
checking whether TIOCSRS485 is declared... no
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating src/Makefile
config.status: creating src/modbus-version.h
config.status: creating doc/Makefile
config.status: creating tests/Makefile
config.status: creating libmodbus.pc
config.status: creating libmodbus.spec
config.status: creating config.h
config.status: creating tests/unit-test.h
config.status: executing depfiles commands
config.status: executing libtool commands

Any ideas?

Thank you in advance.

[dwilliamsvancouv]

I get the exact same result when I try to install libmodbus 3.1.2 on windows 7 using Cygwin. I don't need to use modbus over tcp. I am hoping this problem with winsock2 will not affect me. Am I right in assuming this?

[stephane]

Sorry but I can't help you on Windows support. I've already do my best to support libmodbus on Windows XP but this OS is just a gaming platform for me.

Are you able to provide a patch?

[Ketorin]

I got 3.0.6 to compile by simply commenting out winsock 2, I think.

[stephane]

Could we close this issue?

I'm going to be adding some bugs related to Windows support soon. If you don't want to support Windows you should really drop it from the project's description. It seems like Windows support was and has continued to be absent.

[stephane]

If you have a look to the source code, you'll see I included many tricks to support Windows and I run the unit tests against Windows at each new release but I don't use Windows for work or production so Windows updates or changes can break things.

BTW libmodbus v3.0 doesn't receive changes anymore (see v3.1.x and up).

[stephane]

winsock 2 must be installed for TCP support.

Just because you have Windows-specific code doesn't mean the library builds and runs successfully on Windows.

[stephane]

@R030t1 That's why I run the unit tests on Windows myself (as said in my previous comment).

@oldfaber and @StalderT have provided valuable patches to libmodbus for Windows support but if the users of libmodbus under Windows just complain w/o providing patches I'll just remove the Windows support.

BTW Your comment wasn't helpful to improve the project.