Link failures since 81cb769

[larseggert]

Description

81cb769 broke the way I build quant for RIOT (confirmed via git bissect):

The link step doesn't seem to include the sources added to SRC, causing the link failure below. (The files do get compiled, just not linked.)

Steps to reproduce the issue

1. git clone --shallow git@github.com:NTAP/quant.git
2. git submodule update --init --recursive --depth 1
3. cd riot
4. set RIOTBASE correctly
5. make BUILD_IN_DOCKER=1

Expected results

Expected the firmware to build and link.

Actual results

/data/riotbuild/riotproject/riot/bin/esp32-wroom-32/application_quant-client/main.o:(.text.startup.main+0x4): undefined reference to `quic_transaction'
/data/riotbuild/riotproject/riot/bin/esp32-wroom-32/application_quant-client/main.o: In function `main':
/data/riotbuild/riotproject/riot/main.c:40: undefined reference to `quic_transaction'
collect2: error: ld returned 1 exit status
/data/riotbuild/riotbase/Makefile.include:584: recipe for target '/data/riotbuild/riotproject/riot/bin/esp32-wroom-32/quant-client.elf' failed
make: *** [/data/riotbuild/riotproject/riot/bin/esp32-wroom-32/quant-client.elf] Error 1
make: *** [/Users/lars/Documents/Code/riot/makefiles/docker.inc.mk:304: ..in-docker-container] Error 2

[leandrolanzieri]

@larseggert thanks for reporting this. Could you give it a try with #15364?

[larseggert]

#15364 fixes the issue!