Review request (XS): 7110396: Sound code fails to build on multiarch Linux systems

[mark.reinhold at oracle.com]

Some Linux distros have started to adopt a "multiarch" filesystem layout for
shared libraries in order to support the installation of packages for multiple
hardware architectures on a single system.  For more information see, e.g.,
http://wiki.debian.org/Multiarch.

In Ubuntu 11.10 the ALSA shared library, libasound2, was converted to the
multiarch format and so its files moved from their old location, /usr/lib,
to /usr/lib/${ARCH_TRIPLET}.  This caused the JDK build to fail when linking
the Java sound library.  The root cause appears to be that gcc only tries to
resolve undefined symbols against a multiarch library if the library is named
on the command line after the object files containing those symbols.

The fix is simply to move -lasound to the end of the gcc invocation.

I'll push this into JDK 8.  It would trivially backport to 7.

Patch:

--- a/make/javax/sound/jsoundalsa/Makefile
+++ b/make/javax/sound/jsoundalsa/Makefile
@@ -65,7 +65,7 @@
        $(MIDIFILES_export) \
        $(PORTFILES_export)
 
-LDFLAGS += -lasound
+EXTRA_LIBS += -lasound
 
 CPPFLAGS += \
        -DUSE_DAUDIO=TRUE \

Thanks,
- Mark