[MacPorts] #58767: libsdl2 build failure

[MacPorts]

#58767: libsdl2 build failure
------------------------+---------------------
 Reporter:  dyne2meter  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  libsdl2
------------------------+---------------------
 libsdl2 fails build on mac os 10.11.6 with the following
 {{{
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/work/SDL2-2.0.10/src/video/cocoa/SDL_cocoawindow.m:1119:52:
 error: use of undeclared identifier 'NSEventSubtypeMouseEvent'
 :info:build     const BOOL istrackpad = ([theEvent subtype] ==
 NSEventSubtypeMouseEvent);
 :info:build                                                    ^
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/work/SDL2-2.0.10/src/video/cocoa/SDL_cocoawindow.m:1164:52:
 error: use of undeclared identifier 'NSEventSubtypeMouseEvent'
 :info:build     const BOOL istrackpad = ([theEvent subtype] ==
 NSEventSubtypeMouseEvent);
 :info:build                                                    ^
 :info:build 2 errors generated.
 :info:build make: *** [build/SDL_cocoawindow.lo] Error 1
 :info:build make: *** Waiting for unfinished jobs....
 :info:build libtool: compile:  /usr/bin/clang -pipe -Os -arch x86_64
 -I/opt/local/include -DUSING_GENERATED_CONFIG_H -Iinclude
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/work/SDL2-2.0.10/include
 -idirafter
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/work/SDL2-2.0.10/src/video/khronos
 -mmmx -m3dnow -msse -msse2 -msse3 -Wall -fno-strict-aliasing
 -DTARGET_API_MAC_CARBON -DTARGET_API_MAC_OSX -fvisibility=hidden
 -Wdeclaration-after-statement -Werror=declaration-after-statement
 -D_THREAD_SAFE
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/work/SDL2-2.0.10/src/hidapi/hidapi
 -MMD -MT build/SDL_render_metal.lo -c
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/work/SDL2-2.0.10/src/render/metal/SDL_render_metal.m
 -o build/SDL_render_metal.o >/dev/null 2>&1
 :info:build make: Leaving directory
 `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/work/SDL2-2.0.10'
 :info:build Command failed:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/work/SDL2-2.0.10"
 && /usr/bin/make -j2 -w all V=1
 :info:build Exit code: 2
 :error:build Failed to build libsdl2: command execution failed
 :debug:build Error code: CHILDSTATUS 32064 2
 :debug:build Backtrace: command execution failed
 :debug:build     while executing
 :debug:build "system {*}$notty {*}$nice $fullcmdstring"
 :debug:build     invoked from within
 :debug:build "command_exec build"
 :debug:build     (procedure "portbuild::build_main" line 8)
 :debug:build     invoked from within
 :debug:build "$procedure $targetname"
 :error:build See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/main.log
 for details.
 }}}

 This looks like a Cocoa class introduced only in systems subsequent to El
 Capitan. If there isn't a way to fix this for legacy systems, they are
 going to lose ffmpeg, and then, audacity.

-- 
Ticket URL: <https://trac.macports.org/ticket/58767>
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