Cross-compiler newbie stuck at square one

[lfast]

I'm stuck at square one getting the cross compiler running under CentOS 7. I believe I followed the instructions correctly but I get permissions error from make on the first file. All the perms seem to be right. Three things seem suspicious:

- esp-idf hash is blank - but git log in that folder reports the correct value
- Unknown option: -C git --version => 1.8.3.1
- the last line has a very odd path starting with build/bootloader//home/...

> make
ESP IDF path: /home/lfast/Documents/IoT/micropython/esp-idf
Current git hash:
Supported git hash: 9a55b42f0841b3d38a61089b1dda4bf28135decd
Unknown option: -C
usage: git [--version] ...
CC /home/lfast/Documents/IoT/micropython/esp-idf/components/bootloader_support/src/bootloader_clock.c
make: execvp: /home/lfast/Documents/IoT/micropython/esp32-toolchain/xtensa-esp32-elf/lib/gcc: Permission denied
make: *** [build/bootloader//home/lfast/Documents/IoT/micropython/esp-idf/components/bootloader_support/src/bootloader_clock.o] Error 127

[jickster]

Do you mean mpy-cross?


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[stijn]

If your git version doesn't know the -C switch it is many years old: better get the latest one. If there isn't a newer one for your system you'll have to find a workaround (using --git-dir and --work-tree combination).

Permission denied error could be because gcc isn't executable. Can you just run it from the commandline? What are the full permisions on it reported by ls?

[lfast]

Thanks you both. I'm over the first hump. gcc and all the extensa binaries are prefixed with xtensa-esp32-elf-xyz, so I created a symlink from gcc => xtensa-esp32-elf-gcc. ... and then did the same for g++, ld & size. After that it ran to completion. On to testing...

Regarding your other comments

1. Not mpy-cross. I'm trying to build my own micropython-esp32 installation package.

2. I upgraded git. FYI, the normal CentOS 7 repos don't have git 2.x. They stop at 1.8.3.1 Found the latest here: http://opensource.wandisco.com/centos/7 ... noarch.rpm

[lfast]

... and I now understand why the CROSS-COMPILER variable had that odd syntax: xtensa-esp32-elf-
Thanks again