This was getting a bit unwieldy. The include path setup is not perfect yet, that's work for later.
(It's about time we're getting C++20 with modules so that this include path madness can be put to an end.)
libraries/timidity/instrum_dls.cpp:1071:18: error: ‘INT_MIN’ was not declared in this scope
libraries/timidity/instrum_font.cpp:37:47: error: ‘stricmp’ was not declared in this scope
libraries/timidity/timidity.cpp:207:32: error: ‘strcmp’ was not declared in this scope
libraries/timidity/timidity.cpp:235:24: error: ‘strcmp’ was not declared in this scope
libraries/timidity/timidity.cpp:310:33: error: ‘strchr’ was not declared in this scope
libraries/timidity/timidity.cpp:515:30: error: ‘strchr’ was not declared in this scope
libraries/timidity/timidity.cpp:602:34: error: ‘memset’ was not declared in this scope
libraries/timidity/timidity.cpp:648:35: error: ‘memcpy’ was not declared in this scope
libraries/timidity/timidity.cpp:753:41: error: ‘memset’ was not declared in this scope