Commit 71358845 authored by Eli Zaretskii's avatar Eli Zaretskii

Update nt/INSTALL with respect to giflib.

parent 567f95ec
......@@ -536,14 +536,6 @@ Windows 9X as well).
is in the PATH or otherwise accessible and that the binaries are
compatible (for example, that they were built with the same compiler).
Binaries for the image libraries (among many others) can be found at
the GnuWin32 project. The PNG libraries are also included with GTK,
which is installed along with other Free Software that requires it.
Note specifically that, due to some packaging snafus in the
GnuWin32-supplied image libraries, you will need to download
_source_ packages for some of the libraries in order to get the
header files necessary for building Emacs with image support.
For PNG images, we recommend to use versions 1.4.x and later of
libpng, because previous versions had security issues. You can find
precompiled libraries and headers on the GTK download page for
......@@ -561,6 +553,27 @@ Windows 9X as well).
`dynamic-library-alist' and the value of `libpng-version', and
download compatible DLLs if needed.
For GIF images, we recommend to use versions 5.0.0 or later of
giflib, as it is much enhanced wrt previous versions. You can find
precompiled binaries and headers for giflib on the ezwinports site,
http://sourceforge.net/projects/ezwinports/files/.
Version 5.0.0 and later of giflib are binary incompatible with
previous versions (the signatures of several functions have
changed), so Emacs will only look for giflib libraries that are
compatible with the version it was compiled against. Similar to
libpng, that version is given by the value of the Lisp variable
`libgif-version'; e.g., 50005 means version 5.0.5. The variable
`dynamic-library-alist' is automatically set to name only those DLL
libraries that are known to be compatible with the version given by
`libgif-version'.
Binaries for the other image libraries can be found at the GnuWin32
project. Note specifically that, due to some packaging snafus in
the GnuWin32-supplied image libraries, you will need to download
_source_ packages for some of the libraries in order to get the
header files necessary for building Emacs with image support.
* Optional GnuTLS support
To compile with GnuTLS, you will need pkg-config to be installed, as
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