This is with GNU Make 3.81. I originally posted this as a question on
Stack Overflow, http://stackoverflow.com/questions/6233574/
According to the docs (10.5.1), % in a pattern rule matches "any
nonempty substring". But it seems to actually match some subset of that,
in particular, ones that does not contain spaces.
Say, you set up a source directory:
|mkdir /tmp/foo
cd /tmp/foo
echo 'int main() { return 0; }'> "test.c"
echo 'int main() { return 0; }'> "test space.c"
|
Then build test (using the built-in pattern rule for making an
executable from a C source file):
|anthony@Zia:/tmp/foo$ make "test"
cc test.c -o test
|
As expected, that works, but when you try it on the other file:
|anthony@Zia:/tmp/foo$ make "test space"
make: *** No rule to make target `test space'. Stop.
|
This holds even if you write it into a makefile (making sure to escape
the space, e.g., all: test test\ space), even if you explicitly add your
own %: %.c rule, etc.
You can get it to build it, by adding an "expanded" version of the
pattern match rule:
|test\ space: test\ space.c
$(CC) -o "$@" "$<" # first char is tab, of course.|
(First time I send this message, it vanished into the ether; no
bounceback nor did it appear in the archive. Trying again.)
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