Re: [png-mng-implement] libpng-1.7.0beta03 and MinGW

[John B. <joh...@gm...>]

On Tue, Feb 26, 2013 at 8:14 PM,  <szu...@ar...> wrote:
> I was able to configure 'libpng-1.7.0beta03' with
> the following script:
> ---------------------------------------
> cflags=CPPFLAGS='-I/usr/local/include' LDFLAGS='-L/usr/local/lib'

I'm guessing that this is on Windows, because of the ^M, but Min/GW is
supported on Linux (cross compilation) too, and all those paths look
very unixey.

Assuming I'm correct, we only support libpng on Min/GW using MSYS -
i.e. configure must be run in an MSYS shell.  This is because
otherwise incompatible tools might be used:

> But calling 'make' did not succeed:
>
> line 809 incorrectly formated PNG_DFN line:
> PNG_DFN_END_SORT^M

That's coming out of an awk script (scripts/dfn.awk) because the awk
program is presenting the carriage return in the input to the script.

I need to verify that this doesn't happen with MSYS - (well, it may be
called "beta03" but it is very very seriously "alpha"); the sorting is
new, but I suspect it is because the C compiler being used for
pre-processing is putting \r\n line endings yet the awk program which
reads the output is expecting \n ending and this is a tool mismatch -
the tools have to agree on the line endings!

-- 
John Bowler <joh...@gm...>
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