You can build U-Boot with NO_SDL=1
Ah, thanks... that was the important magic flag I needed!
Actually you should enable the option in configs/sandbox_defconfig, not lib/Kconfig. See the condition used by compression.c:
obj-$(CONFIG_SANDBOX) += compression.o
Okay, makes sense. I looked at the wrong line in the Makefile.
Also, for me the test fails:
./b/sandbox/u-boot -c "ut_compression" ... testing lz4 ... orig_size:350 compressed_size:276 uncompressed_size:350 compress does not overrun Failed: ret != 0 lz4: FAILED ut_compression FAILED
Huh... that's odd. When I run this now, I get:
testing lz4 ... orig_size:350 compressed_size:276 uncompressed_size:350 compress does not overrun uncompress does not overrun lz4: ok
And if I change a byte in the compressed test data, it fails on memcmp() as expected. Are you sure you have no local changes or anything (I based the patch off 1f8836396)? I don't see how this could give different results...