For each generated object file, there is a corresponding .cmdline file
which contains the full compile command line. That file can be parsed to
extract the relevant flags that were used, and is probably easier to
work with than parsing a debug build log.
/Erik
On 2017-08-11 15:37, Maurizio Cimadamore wrote:
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
