Module Name: src
Committed By: rillig
Date: Mon May 23 22:33:56 UTC 2022
Modified Files:
src/distrib/sets/lists/tests: mi
src/usr.bin/make/unit-tests: Makefile
Added Files:
src/usr.bin/make/unit-tests: directive-for-empty.exp
directive-for-empty.mk
Log Message:
tests/make: document and demonstrate .for i containing .if empty(i)
PR bin/43821 describes the inconsistency that in a '.for i' loop, the
condition '.if ${i:M*.c}' works since 2009 while the seemingly
equivalent condition '.if !empty(i:M*.c)' does not access the variable
'i' from the .for loop but instead the global 'i'.
Resolving this situation in a backwards-compatible and non-surprising
way is hard, as make has grown several features during the last 20 years
that interact in various edge cases. For now, document the most obvious
pitfalls.
To generate a diff of this commit:
cvs rdiff -u -r1.1206 -r1.1207 src/distrib/sets/lists/tests/mi
cvs rdiff -u -r1.315 -r1.316 src/usr.bin/make/unit-tests/Makefile
cvs rdiff -u -r0 -r1.1 src/usr.bin/make/unit-tests/directive-for-empty.exp \
src/usr.bin/make/unit-tests/directive-for-empty.mk
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
