[Bug 3784] New: [IcedTea8] Backport "8167481: cleanup of headers and includes for native libnet" to fix builds with glibc >= 2.32

[bugzilla-daemon at icedtea.classpath.org]

https://icedtea.classpath.org/bugzilla/show_bug.cgi?id=3784

            Bug ID: 3784
           Summary: [IcedTea8] Backport "8167481: cleanup of headers and
                    includes for native libnet" to fix builds with glibc
                    >= 2.32
           Product: IcedTea
           Version: 8.x-hg
          Hardware: all
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5
         Component: IcedTea
          Assignee: gnu.andrew at redhat.com
          Reporter: gnu.andrew at redhat.com
                CC: unassigned at icedtea.classpath.org

Glibc 2.32 will remove sys/sysctl.h which is still included by OpenJDK 8:

https://sourceware.org/git/?p=glibc.git;a=patch;h=076f09afbac1aa57756faa7a8feadb7936a724e4

The appearance of this in Fedora:

https://koji.fedoraproject.org/koji/buildinfo?buildID=1494024

has already broken the build there:

/builddir/build/BUILD/java-1.8.0-openjdk-1.8.0.252.b01-0.0.ea.fc33.x86_64/openjdk/jdk/src/solaris/native/java/net/PlainDatagramS
ocketImpl.c:44:10: fatal error: sys/sysctl.h: No such file or directory
   44 | #include <sys/sysctl.h>
      |          ^~~~~~~~~~~~~~
compilation terminated.
gmake[2]: *** [lib/NetworkingLibraries.gmk:62:
/builddir/build/BUILD/java-1.8.0-openjdk-1.8.0.252.b01-0.0.ea.fc33.x86_64/bootbui
ld/jdk8.build/jdk/objs/libnet/PlainDatagramSocketImpl.o] Error 1
gmake[2]: *** Waiting for unfinished jobs....
/builddir/build/BUILD/java-1.8.0-openjdk-1.8.0.252.b01-0.0.ea.fc33.x86_64/openjdk/jdk/src/solaris/native/java/net/PlainSocketImp
l.c:46:10: fatal error: sys/sysctl.h: No such file or directory
   46 | #include <sys/sysctl.h>
      |          ^~~~~~~~~~~~~~
compilation terminated.

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