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Check that #ifdef, #ifndef, and #undef are used with a single name
authorse <se@FreeBSD.org>
Tue, 3 Nov 2020 11:37:19 +0000 (11:37 +0000)
committerse <se@FreeBSD.org>
Tue, 3 Nov 2020 11:37:19 +0000 (11:37 +0000)
commit0a3539f880dec78bdfe2a3a2920f0e755cdbe10d
treecd788d756c81482d84ee98641887852e910608a1
parent38a0fdd5659a581b94414118e9cb4417c4c9eb36
Check that #ifdef, #ifndef, and #undef are used with a single name

This restores the parameter validation that has been peformed by cpp
for defining and testing of names used in conditions.

MFC after: 3 days
usr.bin/calendar/io.c