gdk-pixbuf2 @2.40.0_1 +universal doesn't compile with jpeg and jasper

[someuser12]

Under Mac OS 10.13 and 10.11, while configuring gdk-pixbuf2 @2.40.0_1 with +universal variant set, the build tool meson tries to detect the libraries JPEG and jasper by launching clang on a minimal C program involving only proprocessor directives:

`Command line: /usr/bin/clang -I/opt/local/include /opt/local/var/macports/build /_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_po rts_graphics_gdk-pixbuf2/gdk-pixbuf2/work/build/meson-private/tmp9kj3a3pw/testfi le.c -pipe -E -P -Os -arch x86_64 -arch i386 -P -O0 -std=c99`

Since clang is launched with the flags -E -arch x86_64 -arch i386, it fails with message clang: error: cannot use 'cpp-output' output with multiple -arch options and meson concludes erroneously that the jpeg library is absent.

The same happens with jasper later on.

As a consequence, all software built again the resulting gdk-pixbuf2 (e.g. qiv) will be unable to load or display any JPEG file.

Ugly workaround:

• sudo port extract gdk-pixbuf2 +x11+universal

• Manually edit `port work gdk-pixbuf2`/gdk-pixbuf-2.40.0/meson.build to replace, on line 312, cc.has_header('jpeglib.h') with 1==1 and, on line 363, cc.has_header('jasper/jasper.h') with true

• sudo port install gdk-pixbuf2 .