MinGW .exe requires a few gcc dll's regardless of the code?

Your commands are wrong !

Go to the directory where your main.cpp file is, and try the following.

g++.exe -Wall -c -g main.cpp -o obj\Debug\main.o
g++.exe -static -static-libgcc -static-libstdc++ -o "bin\Debug\Hello World.exe" obj\Debug\main.o

then you'll no longer need to copy the DLLs (for your Hello World program).

Other notes:

The MinGW installation instructions recommends setting

c:\minGW;c:\MinGW\bin;

to the PATH environment variable.

Normally the

-static -static-libgcc -static-libstdc++

linker options should work (try all 3 of them at once). But not for libwinpthread-1.dll.

Also, try to clean before recompiling.

There's no "-static-something" command.

Only standard libraries libgcc and libstdc++ can be set to static linking.

For other libraries, you first switch to static linking with "-static" and then list the libraries to include with separate commands, i.e. "-lpthread".

Cmake users should try adding:

set(CMAKE_CXX_STANDARD_LIBRARIES "-static-libgcc -static-libstdc++ -lwsock32 -lws2_32 ${CMAKE_CXX_STANDARD_LIBRARIES}")

set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-Bstatic,--whole-archive -lwinpthread -Wl,--no-whole-archive")

-static-libgcc may be a bad idea if exceptions are used. link options documentation states that

There are several situations in which an application should use the shared libgcc instead of the static version. The most common of these is when the application wishes to throw and catch exceptions across different shared libraries. In that case, each of the libraries as well as the application itself should use the shared libgcc.