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Output redirection, file creation, and libjpeg.a
- To: gnu-win32 at cygnus dot com
- Subject: Output redirection, file creation, and libjpeg.a
- From: Victor Schneider <vischne at ibm dot net>
- Date: Sun, 12 Oct 1997 17:20:07 GMT
There's a curious problem with porting the jpeg-6 and jpeg-6a libraries to
cygwin32: They compile with no problem, and running `make test' confirms
that they work, but the `cjpeg' and `djpeg' utilities appear to have
problems (a) creating files and (b) using the input and output redirection
operators (`<' and `>').
When you generate a .gif file from a .jpg file using djpeg, you get
`spurious symbol' error messages from lview31.exe on the resulting .gif
file. I think that results from some problem using `>' to generate the
resulting .gif file. I get the impression that cygwin32 uses the Dos '>'
operator and gets junk added in to the redirection process. Either that, or
bash.exe is doing something.
Using the `-outputfile' option in djpeg yields an output file of zero
length. Since this all works under other operating systems like Linux, I
have to assume that the problem is somewhere in the buck-passing between
native Dos and cygwin32.
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