> Ok here's a temporary fix in r6509 that solves the last
> problem while keeping the new Ian flag settings.
> The png header test is not activated yet because it did not
> work under cygwin (?) but this version should work better
> than before as we should have now the rgb32 square pb solved
> as new flag settings are taken in account.
> Modifications are commented, please review.
Close, but...
On mingw, trying to use the system png lib, I configure with:
./configure --enable-threads --enable-cairo
CPPFLAGS=-I/usr/local/include LDFLAGS=-L/usr/local/lib
And configure reports:
Configuration Summary
------------------------------------------------------------------------
-
Directories: prefix=/usr/local
bindir=${exec_prefix}/bin
datadir=${prefix}/share
datarootdir=
exec_prefix=${prefix}
includedir=${prefix}/include
libdir=${exec_prefix}/lib
mandir=${prefix}/man
Graphics: GDI
Image Libraries: JPEG=System
PNG=System
ZLIB=System
CAIRO=lib
Large Files: YES
OpenGL: YES
Threads: YES
Which all looks good.
BUT, config.h is not correct, it has:
/* #undef HAVE_PNG_H */
/* #undef HAVE_LIBPNG_PNG_H */
i.e. neither path to png.h is declared valid. As a result, the build
chokes.
Note that Albrecht's previous workaround (i.e. explicitly setting
--disable-localpng) does not help in this case, the result is
identical...
(I'm beginning to wonder if we should just drop these flags and modify
Fl_PNG_Image.cxx to ignore them!)
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