Transplantation and use of Qt, MinGW, libmodbus source code mode under windows

Transplantation and use of Qt, MinGW, libmodbus source code mode under windows

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1 Introduction

libmodbus official website: https://libmodbus.org/

github download: https://github.com/stephane/libmodbus

As of August 26, 2023, the latest version of libmodbus is 3.1.10, and this blog is ported based on this version.

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2. Transplant

The source code file of libmodbus is as follows:

Create a folder libmodbus-3.1.10 in the Qt project directory to store libmodbus source files, and copy modbus-version.h.in to the past and rename it:

Modify the modbus-version.h file, and change the version information inside to the actual version number:

Create a file called libmodbus.pri and add:

win32:LIBS += -lws2_32

HEADERS += \
    $$PWD/modbus-private.h \
    $$PWD/modbus-rtu-private.h \
    $$PWD/modbus-rtu.h \
    $$PWD/modbus-tcp-private.h \
    $$PWD/modbus-tcp.h \
    $$PWD/modbus-version.h \
    $$PWD/modbus.h

SOURCES += \
    $$PWD/modbus-data.c \
    $$PWD/modbus-rtu.c \
    $$PWD/modbus-tcp.c \
    $$PWD/modbus.c

INCLUDEPATH += $$PWD

Modify the modbus-tcp.c file, find the two header files including winsock2.h and ws2tcpip.h, and add the macro definition _WIN32_WINNT above, as shown in the following figure:

As for why this is done, see my other blog post: The MSYS and MinGW compilation environment under windows reports an error when using the network API: undefined reference to `inet_pton' solution

Then add it to the .pro file of the Qt project include($$PWD/libmodbus-v3.1.10/libmodbus.pri)!

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ends…