Allow the --with-jpeg=yes configure argument again. This
was broken by commit ea00220b6f.
The GP_LIBJPEG macro in the configure script now handles the following cases:
--with-jpeg=no
--without-jpeg
Do not use libjpeg. Do not autodetect it either.
--with-jpeg
--with-jpeg=yes
Autodetect libjpeg. If not found, abort.
<no argument given>
--with-jpeg=auto
--with-jpeg=autodetect
Autodetect libjpeg. If found, use it.
However, it does *NOT* handle
--with-jpeg=/path/to/somewhere
at this time. Set LIBJPEG_CFLAGS and/or LIBJPEG_LIBS
instead to specify which libjpeg to compile with and
link against.
This mostly matches the behaviour from before commit
ea00220b6f, which was
--with-jpeg=no
--without-jpeg
Do not use libjpeg. Do not autodetect it either.
--with-jpeg
--with-jpeg=yes
--with-jpeg=<any value other than "no">
Autodetect libjpeg. If found, use it. Otherwise, silently
ignore the user's wish to build with libjpeg.
<no argument given>
Autodetect libjpeg. If found, use it.
If someone is running configure with --with-jpeg=yes and
libjpeg cannot be used, we can assume that building without
using libjpeg is not the outcome the user expects.
Fixes: https://github.com/gphoto/libgphoto2/issues/759
Closes: https://github.com/gphoto/libgphoto2/pull/760
This requires gettext version 0.18.3 or later, and it removes
the GP_GETTEXT_HACK which used to generate a po/Makevars file
from the po/Makevers.template.
gettext 0.18.3 is the same gettext version requirement
as libexif uses.
gettext 0.18.3 has been released 2013-07-07, which is
a similar timeframe of the autoconf, automake and libtool
releases we require.
If you ever need to build a post 2021 libgphoto2 from
git on a system with pre 0.18.3 gettext, you can can
always prepare a tarball using "make dist" on a system
with gettext 0.18.3 or later, and build that tarball
on the older machine.
Not generating the po/Makevars file any more means that
we need additional consistency checks for the parts of
po/Makevars which cannot be derived from the Autoconf
standard set of AC_SUBST()ed Makefile.in variables.
This gives us a few more features and fixes to rely
on which are present in libtool 2.4.2 (released
2011-10-18), which is older than our autoconf,
automake, and gettext requirements and should therefore
not exclude anyone from building libgphoto2.
Update the libtool initialization to use the more
modern (modern in the sense of libtool 1.9b from
2004-08-29) LT_INIT macro.
We still do not use LTDL_INIT() as that (like AC_WITH_LTDL
used to) insists on us shipping libltdl sources in our
release tarballs, and we do not like shipping third party
sources.
