In this section and paragraph:
10.5.4 How Patterns Match
...
"When the target pattern does not contain a slash (and it usually does
not), directory names in the file names are removed from the file name
before it is compared with the target prefix and suffix."
I think it should instead read
In this section and paragraph:
3.3 Including Other Makefiles
...
If the specified name does not start with a slash, and the file is not
found in the current directory, several other directories are searched.
First, any directories you have specified with the ‘-I’ or
‘--include-dir’ option ar