Removing _devbuild/gen/*
asdl/hnode.asdl -> (asdl_main) -> _devbuild/gen/hnode_asdl.py
frontend/types.asdl -> (asdl_main) -> _devbuild/gen/types_asdl.py
core/runtime.asdl -> (asdl_main) -> _devbuild/gen/runtime_asdl.py
core/value.asdl -> (asdl_main) -> _devbuild/gen/value_asdl.py
tools/find/find.asdl -> (asdl_main) -> _devbuild/gen/find_asdl.py
  (frontend/consts_gen) -> _devbuild/gen/id_kind_asdl.py
  (frontend/consts_gen) -> _devbuild/gen/id_kind.py
frontend/syntax.asdl -> (asdl_main) -> _devbuild/gen/syntax_asdl.py
  (frontend/option_gen) -> _devbuild/gen/option_asdl.py
  (frontend/flag_gen) -> _devbuild/gen/arg_types.py
yaks/yaks.asdl -> (asdl_main) -> _devbuild/gen/yaks_asdl.py
mycpp/examples/expr.asdl -> (asdl_main) -> _devbuild/gen/expr_asdl.py
asdl/examples/demo_lib.asdl -> (asdl_main) -> _devbuild/gen/demo_lib_asdl.py
asdl/examples/typed_demo.asdl -> (asdl_main) -> _devbuild/gen/typed_demo_asdl.py
asdl/examples/shared_variant.asdl -> (asdl_main) -> _devbuild/gen/shared_variant_asdl.py
asdl/examples/typed_arith.asdl -> (asdl_main) -> _devbuild/gen/typed_arith_asdl.py
ysh/grammar.pgen2 -> (ysh/grammar_gen) -> _devbuild/gen/grammar{.marshal,_nt.py}
tools/find/find.pgen2 -> (ysh/grammar_gen) -> _devbuild/gen/find{.marshal,_nt.py}
mycpp/examples/arith.pgen2 -> (ysh/grammar_gen) -> _devbuild/gen/arith{.marshal,_nt.py}
  (pyext/setup_libc.py) -> libc.so
In file included from /usr/include/python2.7/pyconfig.h:6,
                 from /usr/include/python2.7/Python.h:8,
                 from pyext/libc.c:22:
/usr/include/python2.7/pyconfig-64.h:1232:9: warning: "_POSIX_C_SOURCE" redefined
 1232 | #define _POSIX_C_SOURCE 200112L
      |         ^~~~~~~~~~~~~~~
In file included from /usr/include/bits/libc-header-start.h:33,
                 from /usr/include/stdio.h:28,
                 from pyext/libc.c:12:
/usr/include/features.h:292:10: note: this is the location of the previous definition
  292 | # define _POSIX_C_SOURCE        200809L
      |          ^~~~~~~~~~~~~~~
/usr/include/python2.7/pyconfig-64.h:1254:9: warning: "_XOPEN_SOURCE" redefined
 1254 | #define _XOPEN_SOURCE 600
      |         ^~~~~~~~~~~~~
/usr/include/features.h:216:10: note: this is the location of the previous definition
  216 | # define _XOPEN_SOURCE  700
      |          ^~~~~~~~~~~~~
OK _test/unit/pyext/libc_test.py.log
  (pyext/setup_line_input.py) -> line_input.so
pyext/line_input.c:64:10: fatal error: readline/readline.h: No such file or directory
   64 | #include <readline/readline.h>
      |          ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
error: command 'gcc' failed with exit status 1