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Re: weird behavior regarding case sensitivity of GNU make's $(wildcard) function
On Tue, Jul 6, 2010 at 3:59 PM, Corinna Vinschen wrote:
> On Jul ?6 14:11, Robert Schiele wrote:
>> I found the following (in my optinion weird) behavior of the $(wildcard)
>> function of GNU make when running on Cygwin:
>> More generic inspection reveals that apparently the $(wildcard) function seems
>> to be case-insensitive on the directory part but case-sensitive on the file
>> name part of the absolute path given.
>> Is this kind of expected behavior or does this point to a bug in the GNU make
>> implementation (or even further down in a Cygwin library)?
> It looks like this is expected behaviour due to the way make evaluates
> the path in the wildcard function. ?The strace shows that it simply
> checks for the existence of the parent dir /cygdrive/c/path/to. ?This
> works, because /cygdrive paths are case-insensitive by default. ?Next,
> it calls opendir and readdir in a loop to check each file in the
> directory for a match. ?However, the matching algorithm is case-sensitive
> by default. ?This explains the above observation.
>> Does anyone know of a reasonable workaround? Is there a way to make the
>> $(wildcard) function case-insensitive completely (like by setting a special
>> option of flag)? Or is there probably a better replacement function that does
>> basically the same but in a case-insensitive way?
Basically this is due to Cygwin's underlying implementation and
there's nothing that the make program can do about it (it was written
for Unix where everything is case-sensitive).
> I'd suggest to put your build paths under explicit Cygwin mount points
Another possibility may be to symlink /cygdrive/c/Path/to somewhere
under your Cygwin home.
For example, I have symlinked C:\Users\xxx\Downloads as
/cygwin/home/xxx/dl and access downloaded files as ~/dl/foo
Life is complex, with real and imaginary parts.
"Ok, it boots. Which means it must be bug-free and perfect. " -- Linus Torvalds
"People disagree with me. I just ignore them." -- Linus Torvalds
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