Adding Keil MDK built library to the Cube project

[baruch]

I have a Keil MDK project which outputs a library mc_comms.lib. I have another Keil project which uses this library and there are any issues. My customer is using STM Cube and can't build the same test project with the same library.

Here are the errors:

c:\st\stm32cubeide_1.6.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924\tools\arm-none-eabi\bin\ld.exe: cannot find -lB:/STM32/G4/Examples/CubeIDE_1_6_0/zti_lib/zti_lib/lib/mc_comms.lib

c:\st\stm32cubeide_1.6.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924\tools\arm-none-eabi\bin\ld.exe: cannot find -lB:\STM32\G4\Examples\CubeIDE_1_6_0\zti_lib\zti_lib\lib\mc_comms.lib

FYI:  

b:\STM32\G4\Examples\CubeIDE_1_6_0\zti_lib\zti_lib\lib>dir

Volume in drive B is home

Volume Serial Number is 4D4B-F115

Directory of b:\STM32\G4\Examples\CubeIDE_1_6_0\zti_lib\zti_lib\lib

03/18/2021 11:34 <DIR> .

03/17/2021 20:14 <DIR> ..

03/17/2021 18:16 2,139 mc_comms.h

03/18/2021 11:33 32,674 mc_comms.lib

2 File(s) 34,813 bytes

2 Dir(s) 11,366,381,383,680 bytes free

b:\STM32\G4\Examples\CubeIDE_1_6_0\zti_lib\zti_lib\lib>

Do you know what is my problem? How can I resolve it? 

Thanks.

[Pavel A.]

.

[baruch]

That begs a few more questions:

1. is armcc compatible with the gnu arm compiler?
2. where to find linker command-line options in STM32CUBE?

[Pavel A.]

.