75d8998f7c
Undefine __STDC_VERSION__ for C files to avoid mismatch with C11/C17. Define __STDC_VERSION__ for C++ files to use <inttypes.h> path. Reviewed-by: Jesse Natalie <jenatali@microsoft.com> Reviewed-by: Dylan Baker <dylan@pnwbakers.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10196>