hotspot atom editor integration

[Maurizio Cimadamore]

Hi,
over the last few days I've been looking at integrating hotspot with the 
Atom editor [1]. I managed to do it successfully and I can now debug 
hotspot from Atom and even enable code completion (requires clang plugin 
[2]). Regarding code completion, to make it work, you have to come up 
with a file named ".clang_complete", which contains all the options that 
should be passed to the clang compiler. In my case, such options are

-I/w/valhalla/hotspot/src/os/linux/vm
-I/w/valhalla/hotspot/src/share/vm
-I/w/valhalla/hotspot/src/share/vm/precompiled
-I/w/valhalla/hotspot/src/cpu/x86/vm
-I/w/valhalla/hotspot/src/os_cpu/linux_x86/vm
-I/w/valhalla/hotspot/src/os/posix/vm/
-I/w/valhalla/hotspot/test/native/logging
-I/w/valhalla/hotspot/test/native
-I/w/valhalla/build/linux-x86_64-normal-server-slowdebug/hotspot/variant-server/gensrc/
-I/w/valhalla/build/linux-x86_64-normal-server-slowdebug/jdk/include/
-std=gnu++98
-D_GNU_SOURCE
-D_REENTRANT
-fcheck-new
-D__STDC_FORMAT_MACROS
-D__STDC_LIMIT_MACROS
-D__STDC_CONSTANT_MACROS
-DSUPPORTS_CLOCK_MONOTONIC
-DLINUX
-pipe
-fPIC
-fno-rtti
-fno-exceptions
-fvisibility=hidden
-fno-strict-aliasing
-fno-omit-frame-pointer
-DVM_LITTLE_ENDIAN
-D_LP64=1
-Wpointer-arith
-Wsign-compare
-Wunused-function
-Wunused-value
-Woverloaded-virtual
-Wno-format-zero-length
-Wtype-limits
-Wuninitialized
-Wreturn-type
-Wundef
-Wformat=2
-DASSERT
-D_NMT_NOINLINE_
-DTARGET_ARCH_x86
-DINCLUDE_SUFFIX_OS=_linux
-DINCLUDE_SUFFIX_CPU=_x86
-DINCLUDE_SUFFIX_COMPILER=_gcc
-DTARGET_COMPILER_gcc
-DAMD64 -DHOTSPOT_LIB_ARCH='"amd64"'
-DCOMPILER1
-DCOMPILER2
-DINCLUDE_AOT

I mostly obtained them through a combination of trial and error and 
looking at the various build log, to try and figure out how gcc was 
called on my env. My question is - is there a way to obtain such flags 
in a more systematic way using the build system? I presume that hotspot 
IDE integration (not just for Atom) depends on something like that - as 
otherwise the IDE doesn't know where to find sources, and which 
flags/define should be used to process hpp files.

In other words, is there a way to write a script to generate the above 
automatically, and in a robust way?

[1] - https://atom.io/

Cheers
Maurizio