[libc-commits] [libc] [libc][stdio] Add support for the %m modifier (PR #218312)

[Michael Jones via libc-commits]

================
@@ -77,6 +77,10 @@
     "LIBC_CONF_SCANF_PROVIDE_ISOC99_ALIASES": {
       "value": false,
       "doc": "Add __isoc99_* aliases for scanf's functions."
+    },
+    "LIBC_CONF_SCANF_DISABLE_ALLOCATION": {
+      "value": false,
+      "doc": "Disable %m for allocations"
----------------
michaelrj-google wrote:

expand a bit on what the m flag is. It's a flag that POSIX specifies for string conversions that makes them allocate a new buffer for the result.

https://github.com/llvm/llvm-project/pull/218312