Trying to build CP on macOS 15.7 on | adafruit | Page 1

vocal nest Oct 5, 2025, 9:59 PM

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gmake -d output is voluminous and ends with

../py/mkrules.mk:104: update target 'build/py/emitnx64.o' due to: target does not exist
: "CC ../py/emitnx64.c"
Putting child 0x7fdd8a205ac0 (build/py/emitnx64.o) PID 40851 on the chain.
Live child 0x7fdd8a205ac0 (build/py/emitnx64.o) PID 40851 
Reaping winning child 0x7fdd8a205ac0 PID 40851 
clang  -DFFCONF_H=\"lib/oofatfs/ffconf.h\" -I. -Ibuild -I.. -Wall -Werror -Wextra -Wno-unused-parameter -Wpointer-arith -std=gnu99 -Os   -fdata-sections -ffunction-sections -fno-asynchronous-unwind-tables -DCIRCUITPY -c -MD -MF build/py/emitnx64.d -o build/py/emitnx64.o ../py/emitnx64.c || (echo -e "See \033[1;31mhttps://learn.adafruit.com/building-circuitpython; Adafruit Discord #circuitpython-dev\033[0m"; false)
Live child 0x7fdd8a205ac0 (build/py/emitnx64.o) PID 40852 
In file included from ../py/emitnx64.c:16:
../py/emitnative.c:2423:5: error: variable length array folded to constant array as an extension [-Werror,-Wgnu-folding-constant]
 2423 |     MP_STATIC_ASSERT(MP_OBJ_STOP_ITERATION == 0);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../py/misc.h:57:51: note: expanded from macro 'MP_STATIC_ASSERT'
   57 | #define MP_STATIC_ASSERT(cond) ((void)sizeof(char[1 - 2 * !(cond)]))
      |                                                   ^~~~~~~~~~~~~~~
1 error generated.

slender crane Oct 5, 2025, 11:24 PM

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Also see https://github.com/adafruit/circuitpython/issues/10651. Are you the same person?

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I don't see this on the tip of main when compiling in Ubuntu 24.04.

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I can try this on macOS later this evening.

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Try 14.2.Rel1 for gcc. That's what I currently have

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14.3.Rel1 is OK for me on Ubuntu 24.04. rm -rf mpy-cross/build to get a clean build if you have not already done that.

slender crane Oct 6, 2025, 12:12 AM

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Wait, this is for Mpy-cross, which will use the native gcc, not arm-none-eabi-gcc.

What version is regular gcc?

vocal nest Oct 6, 2025, 2:37 AM

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slender crane Wait, this is for Mpy-cross, which will use the native gcc, not arm-none-eabi-gc...

The native gcc is the vendor compiler in Xcode 26 command line tools

$ gcc --version         
Apple clang version 17.0.0 (clang-1700.3.19.1)
Target: x86_64-apple-darwin24.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

vocal nest Oct 6, 2025, 2:38 AM

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slender crane Also see <https://github.com/adafruit/circuitpython/issues/10651>. Are you the s...

And no, I am not the person who filed https://github.com/adafruit/circuitpython/issues/10651

slender crane Oct 6, 2025, 1:35 PM

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Both you and the issue poster are using clang 17, which is obviously doing some extra warning processing that gcc is not. This code is inherited from MicroPython and I'll see if they have encountered this problem..

vocal nest Oct 6, 2025, 9:24 PM

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slender crane Both you and the issue poster are using clang 17, which is obviously doing some ...

FWIW i was able to build mpy-cross in latest MP without problems, but I didn't look beyond that to see what the diff is.

slender crane Oct 6, 2025, 9:46 PM

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vocal nest FWIW i was able to build `mpy-cross` in latest MP without problems, but I didn't...

micropython doesn't turn on as many warnings as we do, so there may be no code difference

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... and, there isn't, at least at line 2423.

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aha, fixed by micropython a few days ago: https://github.com/micropython/micropython/issues/18116