How do I build static libs? Especially libvchiq_arm!

[Fredrum]

Describe the bug
I'm passing the options in CMakeFiles.txt to build static libs but they don't seem to work.
I managed to build libbcm_host and libvcos by editing the CMakefiles in those directories but for libvchiq_arm I get error messages.

To reproduce

1. cd userland/interface/vchiq_arm
2. Add to CMakeLists.txt

SET(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
SET(BUILD_SHARED_LIBS OFF)
SET(CMAKE_EXE_LINKER_FLAGS "-static")

3. cmake .
4. make

I get:

[ 20%] Building C object CMakeFiles/vchiq_arm.dir/vchiq_lib.o
/home/pi/hardwarez/userland/interface/vchiq_arm/vchiq_lib.c: In function ‘completion_thread’:
/home/pi/hardwarez/userland/interface/vchiq_arm/vchiq_lib.c:1507:7: error: ‘VCHI_CALLBACK_SERVICE_OPENED’ undeclared (first use in this function); did you mean ‘VCHI_CALLBACK_SERVICE_CLOSED’?
       VCHI_CALLBACK_SERVICE_OPENED,        // VCHIQ_SERVICE_OPENED
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
       VCHI_CALLBACK_SERVICE_CLOSED
/home/pi/hardwarez/userland/interface/vchiq_arm/vchiq_lib.c:1507:7: note: each undeclared identifier is reported only once for each function it appears in
/home/pi/hardwarez/userland/interface/vchiq_arm/vchiq_lib.c:1512:7: error: ‘VCHI_CALLBACK_BULK_TRANSMIT_ABORTED’ undeclared (first use in this function); did you mean ‘VCHIQ_BULK_TRANSMIT_ABORTED’?
       VCHI_CALLBACK_BULK_TRANSMIT_ABORTED, // VCHIQ_BULK_TRANSMIT_ABORTED
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       VCHIQ_BULK_TRANSMIT_ABORTED
/home/pi/hardwarez/userland/interface/vchiq_arm/vchiq_lib.c:1513:7: error: ‘VCHI_CALLBACK_BULK_RECEIVE_ABORTED’ undeclared (first use in this function); did you mean ‘VCHI_CALLBACK_BULK_RECEIVED’?
       VCHI_CALLBACK_BULK_RECEIVE_ABORTED,  // VCHIQ_BULK_RECEIVE_ABORTED
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       VCHI_CALLBACK_BULK_RECEIVED
make[2]: *** [CMakeFiles/vchiq_arm.dir/build.make:63: CMakeFiles/vchiq_arm.dir/vchiq_lib.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:110: CMakeFiles/vchiq_arm.dir/all] Error 2
make: *** [Makefile:130: all] Error 2

I also tried adding the same lines to the CMakeLists.txt in the userland root and 'make' from there but that didn't work either.

Expected behaviour
I need to be able to build 'libvchiq_arm' as a static library.

Actual behaviour
See above

System
RPi 4b 4GB - Raspbian Buster 32bit. Working from standard Desktop.

• Which firmware version (vcgencmd version)?

Oct 22 2020 14:00:27 
Copyright (c) 2012 Broadcom
version 74e754ff8947c58d2773253f77f6f68a303188f8 (clean) (release) (start_x

• Which kernel version (uname -a)?
  Linux sensitpi 5.4.72-v7l+ #1356 SMP Thu Oct 22 13:57:51 BST 2020 armv7l GNU/Linux

Cheers!
Fred

[Fredrum]

Actually I just got it to work. I did a bunch of things and not exactly sure what contributed.
But it got the .a file I was looking for! Thank You.