Re: GCC?, was Re: Running m68k on qemu with external initramfs?

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On Sun, 12 Apr 2020, Rob Landley wrote:

Target: m68k-linux-musl
Configured with: ../src_gcc/configure --enable-languages=c,c++ CFLAGS=' -g0 -Os'

Was toysh also built with -Os in CFLAGS? If so, I suggest you try -O2. The 
reason being that my Gentoo/m68k system failed to build Python with -Os.
Like your toysh seg fault, this python seg fault also happened on 
qemu-system-m68k. This toolchain uses glibc 2.31, gcc 9.3 and binutils 
2.34.

building '_ctypes' extension
...
/bin/sh: line 9: 11966 Segmentation fault      
LD_LIBRARY_PATH=/var/tmp/portage/dev-lang/python-3.7.7-r1/work/Python-3.7.7 
CC='m68k-unknown-linux-gnu-gcc -pthread' 
LDSHARED='m68k-unknown-linux-gnu-gcc -pthread -shared -Wl,-O1 
-Wl,--as-needed -L.   ' CFLAGS='-Wno-unused-result -Wsign-compare -DNDEBUG  
-Os -fwrapv  ' _TCLTK_INCLUDES='' _TCLTK_LIBS='' ./python -E ./setup.py 
$quiet build
make: *** [Makefile:628: sharedmods] Error 139

I have a todo item to pare my 2700 line toysh source file (plus however 
muchof main.c and lib/*.c it's pulling in, "LDFLAGS=--static 
CROSS_COMPILE=ccc/m68k-linux-musl-cross/bin/m68k-linux-musl- make sh" 
makes a 99k m68k binary) down into a minimal reproduction thingy, but 
I'm trying to get the other targets to finish parsing the init script so 
I can cut a toybox release.

It would be great to have a minimal reproducer from toysh. Getting that 
from the python build looks hard, even with creduce.
https://embed.cs.utah.edu/creduce/



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