iinc_w instruction and hsdis build instructions ...

[kedar mhaswade]

Hello JVM developers!
  I hope I am posting to the right mailing list, if not, please let me know
where I should direct these two questions.

1) When generating the bytecode by javac-7 and javac-8, I see iinc_w
instruction (and javap shows subtle differences in disassembly on the same
java class file). I don't find a direct reference to this instruction at:
http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-6.html#jvms-6.5.

Where should I be looking for the documentation?

2) I want to build hsdis on Ubuntu 14.04. I have tried with a bunch of
binutils versions, but it fails rather obscurely [1]. Are there any
instructions for a successful build on Ubuntu/Debian?

Thanks!
-Kedar

1- /bin/bash ./libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I.
-I/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd
-I. -I.
-I/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd
-I/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/../include
    -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Werror -fPIC -O -c
-o elf64-x86-64.lo
/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/elf64-x86-64.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I.
-I/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd
-I. -I.
-I/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd
-I/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/../include
-W -Wall -Wstrict-prototypes -Wmissing-prototypes -Werror -fPIC -O -c
/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/elf64-x86-64.c
-o elf64-x86-64.o
/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/elf64-x86-64.c:
In function 'elf64_x86_64_relocate_section':
/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/elf64-x86-64.c:2394:16:
error: variable 'warned' set but not used [-Werror=unused-but-set-variable]
    bfd_boolean warned;
                ^
/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/elf64-x86-64.c:2870:29:
error: variable 'type2' set but not used [-Werror=unused-but-set-variable]
     unsigned int val, type, type2;
                             ^
/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/elf64-x86-64.c:3116:29:
error: variable 'type2' set but not used [-Werror=unused-but-set-variable]
     unsigned int val, type, type2;
                             ^
/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/elf64-x86-64.c:3116:23:
error: variable 'type' set but not used [-Werror=unused-but-set-variable]
     unsigned int val, type, type2;
                       ^
/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/elf64-x86-64.c:3116:18:
error: variable 'val' set but not used [-Werror=unused-but-set-variable]
     unsigned int val, type, type2;
                  ^
/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/elf64-x86-64.c:3147:23:
error: variable 'type' set but not used [-Werror=unused-but-set-variable]
     unsigned int val, type;
                       ^
/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/binutils-2.19.1/bfd/elf64-x86-64.c:3147:18:
error: variable 'val' set but not used [-Werror=unused-but-set-variable]
     unsigned int val, type;
                  ^
cc1: all warnings being treated as errors
make[4]: *** [elf64-x86-64.lo] Error 1
make[4]: Leaving directory
`/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/build/linux-amd64/bfd'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory
`/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/build/linux-amd64/bfd'
make[2]: *** [all] Error 2
make[2]: Leaving directory
`/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/build/linux-amd64/bfd'
make[1]: *** [all-bfd] Error 2
make[1]: Leaving directory
`/media/kedar/2tb1/Projects/hsdis/openjdk/hotspot/src/share/tools/hsdis/build/linux-amd64'
make: *** [build/linux-amd64/bfd/libbfd.a] Error 2