[Buildroot] Error building Python with musl in 2020.02

[Simon Rowe]

I'm getting the following error when trying out 2020.02 with the latest musl-based toolchain


/build/host/bin/x86_64-buildroot-linux-musl-gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os    -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Werror=implicit-function-declaration  -I./Include/internal  -I. -I./Include -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -fPIC -DPy_BUILD_CORE_BUILTIN  -c ./Modules/xxsubtype.c -o Modules/xxsubtype.o
./Modules/posixmodule.c: In function 'os_copy_file_range_impl':
./Modules/posixmodule.c:9704:15: error: implicit declaration of function 'copy_file_range'; did you mean 'sync_file_range'? [-Werror=implicit-function-declaration]
 9704 |         ret = copy_file_range(src, p_offset_src, dst, p_offset_dst, count, flags);
      |               ^~~~~~~~~~~~~~~
      |               sync_file_range
cc1: some warnings being treated as errors
Makefile:1938: recipe for target 'Modules/posixmodule.o' failed


Has anyone else seen this?


Simon
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