[mypyc] Add Python 3.12 feature macro (#15465)

JukkaL · web-flow · commit 719e7e77a52d · 2023-06-19T12:34:07.000+01:00
It's currently unused but I have other PRs that will need this.

We can later make this more general and support things like "are we
running on Python 3.12 beta 2 or later", but this seems good enough for
now.
diff --git a/mypyc/lib-rt/mypyc_util.h b/mypyc/lib-rt/mypyc_util.h
@@ -69,4 +69,7 @@ static inline CPyTagged CPyTagged_ShortFromSsize_t(Py_ssize_t x) {
     return x << 1;
 }
 
+// Are we targeting Python 3.12 or newer?
+#define CPY_3_12_FEATURES (PY_VERSION_HEX >= 0x030c0000)
+
 #endif

Original file line number	Diff line number	Diff line change
`@@ -69,4 +69,7 @@ static inline CPyTagged CPyTagged_ShortFromSsize_t(Py_ssize_t x) {`
`69`	`69`	`return x << 1;`
`70`	`70`	`}`
`71`	`71`
	`72`	`+// Are we targeting Python 3.12 or newer?`
	`73`	`+#define CPY_3_12_FEATURES (PY_VERSION_HEX >= 0x030c0000)`
	`74`	`+`
`72`	`75`	`#endif`