Also pass whether or not the build is shared to cpython-sys

Author: emmatyping

Cargo.lock

@@ -3375,7 +3375,7 @@ Python/thread.o: @THREADHEADERS@ $(srcdir)/Python/condvar.h
 # Module dependencies and platform-specific files
 
 cpython-sys: Modules/cpython-sys/Cargo.toml Modules/cpython-sys/build.rs Modules/cpython-sys/wrapper.h Modules/cpython-sys/parser.h
-	CARGO_TARGET_DIR=$(abs_builddir)/target PYTHON_BUILD_DIR=$(abs_builddir) \$(CARGO_HOME)/bin/cargo build --lib --locked --package cpython-sys --profile $(CARGO_PROFILE) $(if $(CARGO_TARGET),--target=$(CARGO_TARGET)) --manifest-path $(srcdir)/Cargo.toml
+	CARGO_TARGET_DIR=$(abs_builddir)/target PYTHON_BUILD_DIR=$(abs_builddir) RUST_SHARED_BUILD=\$(PY_ENABLE_SHARED) \$(CARGO_HOME)/bin/cargo build --lib --locked --package cpython-sys --profile $(CARGO_PROFILE) $(if $(CARGO_TARGET),--target=$(CARGO_TARGET)) --manifest-path $(srcdir)/Cargo.toml
 
 # force rebuild when header file or module build flavor (static/shared) is changed
 MODULE_DEPS_STATIC=Modules/config.c

Makefile.pre.in

@@ -6,4 +6,5 @@ edition = "2024"
 [dependencies]
 
 [build-dependencies]
-bindgen = "0.72.1"
+bindgen = "0.72.1"
+cpython-build-helper = { path = "../cpython-build-helper" }

Modules/cpython-sys/Cargo.toml

@@ -1,7 +1,10 @@
 use std::env;
 use std::path::{Path, PathBuf};
 
+use cpython_build_helper::print_linker_args;
+
 fn main() {
+    print_linker_args();
     let manifest_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
     let srcdir = manifest_dir
         .parent()