[MacPorts] #60232: gdk-pixbuf2 @2.40.0_1 +universal doesn't compile with jpeg and jasper

[MacPorts]

#60232: gdk-pixbuf2 @2.40.0_1 +universal doesn't compile with jpeg and jasper
------------------------+-------------------------
 Reporter:  someuser12  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  gdk-pixbuf2
------------------------+-------------------------
 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` .

 As a side note, meson (as of 0.54.0.rc1) misdetects Apple's clang version:
 https://github.com/mesonbuild/meson/issues/6253 .

-- 
Ticket URL: <https://trac.macports.org/ticket/60232>
MacPorts <https://www.macports.org/>
Ports system for macOS