One may be using IJG libjpeg or libjpeg-turbo to build GTK, and their
build files may or may not generate pkg-config files for us. To make
things easier, we can make use of CMake's built-in support for finding
IJG libjpeg or libjpeg-turbo.
tiff_dep = dependency(is_msvc_like ? 'tiff' : 'libtiff-4',
fallback: ['libtiff', 'libtiff4_dep'],
required: true)
-jpeg_dep = dependency('libjpeg',
+jpeg_dep = dependency(is_msvc_like ? 'jpeg' : 'libjpeg',
fallback: ['libjpeg-turbo', 'jpeg_dep'],
required: true)