bpo-45573: Detect stdlib extension modules in configure

[tiran]

work in progress

configure now detects if a stdlib extension module is enabled/disabled and all prerequisites are available. Compiler and linker flags are passed to Makefile, makesetup, and setup.py.

For each extension module Makefile now contains up to three additional variables:

MODULE__SSL=yes MODULE__SSL_CFLAGS= MODULE__SSL_LDFLAGS=-lssl -lcrypto 

Modules/Setup entries use the new variables. An entry like _ssl _ssl.c is sufficient to compile the ssl module as builtin. All compiler and linker flags are set by configure. The MODULE_EGG can be one of yes, disabled, missing, n/a.

Modules/_ssl.o: $(srcdir)/Modules/_ssl.c $(MODULE__SSL_DEPS) $(PYTHON_HEADERS) Modules/config.c $(CC) $(CCSHARED) $(PY_CFLAGS_NODIST) $(PY_CPPFLAGS) $(MODULE__SSL_CFLAGS) -c $(srcdir)/Modules/_ssl.c -o Modules/_ssl.o Modules/_ssl$(EXT_SUFFIX): Modules/_ssl.o $(BLDSHARED) Modules/_ssl.o $(MODULE__SSL_LDFLAGS) -o Modules/_ssl$(EXT_SUFFIX) 

Missing modules: _curses, _curses_panel, _dbm, _sqlite3, _nis, _ctypes.

Signed-off-by: Christian Heimes christian@python.org

https://bugs.python.org/issue45573

[github-actions]

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