qt5-qtmultimedia build failure on CentOS 6

[Jason Bacon <bacon4000%gmail.com@localhost>]

When building x11/qt5-qtmultimedia on CentOS 6, the install target fails 
because it can't find libqtaudio_alsa.la.

I traced the problem to configure's failure to find the alsa-lib 
dependency, because it can't find asoundlib.h.

config.log:

executing config test alsa
+ cd 
/home/sharedapps/pkgsrc-2016Q1/jb-wip/qt5-qtmultimedia/work/qtmultimedia-opensource-src-5.5.1/config.tests/alsa 
&& /sharedapps/pkg-2016Q1/qt5/bin/qmake -spec 
/sharedapps/pkg-2016Q1/qt5/mkspecs/linux-g++ "CONFIG -= qt 
debug_and_release app_bundle lib_bundle" 
/home/sharedapps/pkgsrc-2016Q1/jb-wip/qt5-qtmultimedia/work/qtmultimedia-opensource-src-5.5.1/config.tests/alsa
+ cd 
/home/sharedapps/pkgsrc-2016Q1/jb-wip/qt5-qtmultimedia/work/qtmultimedia-opensource-src-5.5.1/config.tests/alsa 
&& make
make[2]: Entering directory 
`/home/sharedapps/pkgsrc-2016Q1/jb-wip/qt5-qtmultimedia/work/qtmultimedia-opensource-src-5.5.1/config.tests/alsa'
libtool --silent --mode=compile c++ -c -I/usr/include 
-I/sharedapps/pkg-2016Q1/include 
-I/sharedapps/pkg-2016Q1/include/freetype2 
-I/sharedapps/pkg-2016Q1/lib/dbus-1.0/include/dbus 
-I/sharedapps/pkg-2016Q1/include/libdrm -fno-exceptions -Wall -W -fPIC 
-DQT_NO_MTDEV -DQT_NO_LIBUDEV -DQT_NO_TSLIB -DQT_NO_LIBINPUT 
-DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I. 
-isystem /usr/include -I/sharedapps/pkg-2016Q1/include 
-I/sharedapps/pkg-2016Q1/include/freetype2 
-I/sharedapps/pkg-2016Q1/lib/dbus-1.0/include/dbus 
-I/sharedapps/pkg-2016Q1/include/libdrm -I/sharedapps/pkg-2016Q1/include 
-I/sharedapps/pkg-2016Q1/qt5/mkspecs/linux-g++ -o .obj/alsatest.lo 
alsatest.cpp
alsatest.cpp:34:28: error: alsa/asoundlib.h: No such file or directory
alsatest.cpp:36:2: error: #error "Alsa version found too old, require >= 
1.0.10"
alsatest.cpp:39: warning: unused parameter 'argc'
alsatest.cpp:39: warning: unused parameter 'argv'
make[2]: *** [.obj/alsatest.lo] Error 1
make[2]: Leaving directory 
`/home/sharedapps/pkgsrc-2016Q1/jb-wip/qt5-qtmultimedia/work/qtmultimedia-opensource-src-5.5.1/config.tests/alsa'
test alsa FAILED

The header is there, however:

[bacon@sciprog2 qt5-qtmultimedia]$ ls 
/sharedapps/pkg-2016Q1/include/alsa/asoundlib.h
/sharedapps/pkg-2016Q1/include/alsa/asoundlib.h

and the test program uses an include matching the -I flag:

#include <alsa/asoundlib.h>

Any suggestions as to what might be causing this?

I worked around it for now by commenting out the following in Makefile:

PLIST.alsa=            yes

Thanks,

    Jason

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