Support relative paths in UNIX search PATH

[me-no-dev]

Copy of #8622 for v3.0.0

[tbk2]

Hi,

since this commit I get this error:

$ espmake32
esp32-hal-dac.c
cbuf.cpp
stdlib_noniso.c
esptool.py v4.6
Creating esp32 image...
Merged 1 ELF section
Successfully created esp32 image.
/usr/bin/env: ‘:’: No such file or directory
make: *** [~/git/makeEspArduino/makeEspArduino.mk:528: prebuild] Error 127
make: *** Waiting for unfinished jobs....

if i checkout commit e4b701b everything is fine

[me-no-dev]

I see that you are using makeEspArduino. Could it be that it's parsing platform.txt wrong?

[tbk2]

the new commit of makeEspArduino fixed the problem (plerup/makeEspArduino@d3c088b)!