undefined reference to `WinMain@16'

Question

When I try to build a program using Eclipse CDT, I get the following:

/mingw/lib/libmingw32.a(main.o):main.c:(.text+0x106): undefined r

Answer 1

Check that All Files are Included in Your Project:

I had this same error pop up after I updated cLion. After hours of tinkering, I noticed one of my files was not included in the project target. After I added it back to the active project, I stopped getting the undefined reference to winmain16, and the code compiled.

Edit: It's also worthwhile to check the build settings within your IDE.

(Not sure if this error is related to having recently updated the IDE - could be causal or simply correlative. Feel free to comment with any insight on that factor!)