cpython/Tools/wasm/config.site-wasm32-emscripten

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# config.site override for cross compiling to wasm32-emscripten platform
#
# CONFIG_SITE=Tools/wasm/config.site-wasm32-emscripten \
# emconfigure ./configure --host=wasm32-unknown-emscripten --build=...
#
# Written by Christian Heimes <christian@python.org>
# Partly based on pyodide's pyconfig.undefs.h file.
#
# cannot be detected in cross builds
ac_cv_buggy_getaddrinfo=no
# Emscripten has no /dev/pt*
ac_cv_file__dev_ptmx=no
ac_cv_file__dev_ptc=no
# dummy readelf, Emscripten build does not need readelf.
ac_cv_prog_ac_ct_READELF=true
# new undefined symbols / unsupported features
ac_cv_func_posix_spawn=no
ac_cv_func_posix_spawnp=no
ac_cv_func_eventfd=no
ac_cv_func_memfd_create=no
ac_cv_func_prlimit=no
# unsupported syscall, https://github.com/emscripten-core/emscripten/issues/13393
ac_cv_func_shutdown=no
# The rest is based on pyodide
# https://github.com/pyodide/pyodide/blob/main/cpython/pyconfig.undefs.h
ac_cv_func_epoll_create=no
ac_cv_func_epoll_create1=no
ac_cv_header_linux_vm_sockets_h=no
ac_cv_func_socketpair=no
ac_cv_func_sigaction=no
# symlinkat is implemented, but fails
ac_cv_func_symlinkat=no
# lchmod/lchown are implemented, but fail with ENOTSUP.
ac_cv_func_lchmod=no
ac_cv_func_lchown=no
# geteuid / getegid are stubs and always return 0 (root). The stub breaks
# code that assume effective user root has special permissions.
ac_cv_func_geteuid=no
ac_cv_func_getegid=no
ac_cv_func_seteuid=no
ac_cv_func_setegid=no
# Syscalls not implemented in emscripten
# [Errno 52] Function not implemented
ac_cv_func_preadv2=no
ac_cv_func_preadv=no
ac_cv_func_pwritev2=no
ac_cv_func_pwritev=no
ac_cv_func_pipe2=no
ac_cv_func_nice=no
ac_cv_func_setpriority=no
ac_cv_func_setitimer=no
# unsupported syscall: __syscall_prlimit64
ac_cv_func_prlimit=no
# unsupported syscall: __syscall_getrusage
ac_cv_func_getrusage=no
ac_cv_func_posix_fallocate=no
# Syscalls that resulted in a segfault
ac_cv_func_utimensat=no
ac_cv_header_sys_ioctl_h=no
# sockets are supported, but only AF_INET / AF_INET6 in non-blocking mode.
# Disable AF_UNIX and AF_PACKET support, see socketmodule.h.
ac_cv_header_sys_un_h=no
ac_cv_header_netpacket_packet_h=no
# aborts with bad ioctl
ac_cv_func_openpty=no
ac_cv_func_forkpty=no
# mkfifo and mknod are broken, create regular file
ac_cv_func_mkfifo=no
ac_cv_func_mkfifoat=no
ac_cv_func_mknod=no
ac_cv_func_mknodat=no
# always fails with permission or not implemented error
ac_cv_func_getgroups=no
ac_cv_func_setgroups=no
ac_cv_func_setresuid=no
ac_cv_func_setresgid=no
# Emscripten does not support hard links, always fails with errno 34
# "Too many links". See emscripten_syscall_stubs.c
ac_cv_func_link=no
ac_cv_func_linkat=no
# Emscripten's faccessat does not accept AT_* flags.
ac_cv_func_faccessat=no
# alarm signal is not delivered, may need a callback into the event loop?
ac_cv_func_alarm=no