fix(Build): Allow Users to Give Absolute Paths to SRCS

[Jake-Carter]

Pull Request Template

Description

This PR allows user's to individually add source files to the build by giving an absolute path to SRCS.

Details

Documentation has been written under the assumption that this worked.

SRCS += /my/absolute/path/to/file.c

However, we create our object file rules using "stripped" names...

# gcc.mk
# Create output object file names
SRCS_NOPATH := $(foreach NAME,$(SRCS),$(basename $(notdir $(NAME))).c)
BINS_NOPATH := $(foreach NAME,$(BINS),$(basename $(notdir $(NAME))).bin)
OBJS_NOPATH := $(SRCS_NOPATH:.c=.o)
OBJS_NOPATH += $(BINS_NOPATH:.bin=.o)
OBJS        := $(OBJS_NOPATH:%.o=$(BUILD_DIR)/%.o)
OBJS        += $(PROJ_OBJS)
# ...

... so VPATH was also needed. This is redundant and has larger implications with AUTOSEARCH.

SRCS += /my/absolute/path/to/file.c
VPATH += /my/absolute/path/to
# ^ This shouldn't be necessary

Test

1. Add a file to some external directory with the following contents:

#warning "Hello file!"

2. Add the absolute path of the file to SRCS in project.mk of any project

# project.mk...
# **********************************************************

# Add your config here!

SRCS += /home/jakecarter/test.c

3. Run the build

~/repos/fork/msdk/Examples/MAX78000/Hello_World (fix/srcs-abspath*) » make                       jakecarter@HYB-oGob9vaIij8
Loaded project.mk
  CC    /home/jakecarter/test.c
/home/jakecarter/test.c:1:2: warning: #warning "Hello file!" [-Wcpp]
    1 | #warning "Hello file!"
      |  ^~~~~~~
  CC    main.c
  CC    /home/jakecarter/repos/fork/msdk/Libraries/Boards/MAX78000/EvKit_V1/Source/board.c
  CC    /home/jakecarter/repos/fork/msdk/Libraries/MiscDrivers/stdio.c
  CC    /home/jakecarter/repos/fork/msdk/Libraries/MiscDrivers/LED/led.c
  CC    /home/jakecarter/repos/fork/msdk/Libraries/MiscDrivers/PushButton/pb.c
  CC    /home/jakecarter/repos/fork/msdk/Libraries/MiscDrivers/Display/tft_ssd2119.c
  CC    /home/jakecarter/repos/fork/msdk/Libraries/MiscDrivers/Touchscreen/tsc2046.c
  CC    /home/jakecarter/repos/fork/msdk/Libraries/MiscDrivers/Camera/camera.c
  CC    /home/jakecarter/repos/fork/msdk/Libraries/MiscDrivers/Camera/ov7692.c
  CC    /home/jakecarter/repos/fork/msdk/Libraries/MiscDrivers/Camera/sccb.c
  AS    /home/jakecarter/repos/fork/msdk/Libraries/CMSIS/Device/Maxim/MAX78000/Source/GCC/startup_max78000.S
  CC    /home/jakecarter/repos/fork/msdk/Libraries/CMSIS/Device/Maxim/MAX78000/Source/heap.c
  CC    /home/jakecarter/repos/fork/msdk/Libraries/CMSIS/Device/Maxim/MAX78000/Source/system_max78000.c
  LD    /home/jakecarter/repos/fork/msdk/Examples/MAX78000/Hello_World/build/max78000.elf
arm-none-eabi-size --format=berkeley /home/jakecarter/repos/fork/msdk/Examples/MAX78000/Hello_World/build/max78000.elf
   text    data     bss     dec     hex filename
  36092    2504    1228   39824    9b90 /home/jakecarter/repos/fork/msdk/Examples/MAX78000/Hello_World/build/max78000.elf

Checklist Before Requesting Review

• PR Title follows correct guidelines.
• Description of changes and all other relevant information.
• (Optional) Link any related Github issues using a keyword
• (Optional) Provide info on any relevant functional testing/validation. For API changes or significant features, this is not optional.

[EricB-ADI]

Build examples is failing for MAX78000

[Jake-Carter]

Build examples is failing for MAX78000

@EricB-ADI Fixed in #667

[sihyung-maxim]

The PR title checker is going to fail until your other PR with the Build scope addition is merged into main.