On 2013-11-25 03:01, David Holmes wrote:
Hi Matthias,
On 22/11/2013 10:55 PM, Baesken, Matthias wrote:
I had the need for setting additional C/C++ compilation flags in my
OpenJDK8 build.
It seems they are used for most jdk C/C++ compilation, but at least
the generators from
jdk/makefiles/gensrc/GensrcMisc.gmk
seem to be an exception.
The "extra flags' variables are intended for use when compiling the
actual JDK sources, not for compiling auxiliary tools used during the
build process. There is currently no means, that I am aware of, to
customize those invocations.
To expand further on this the primary role of the "extra flags" is to
provide values needed for cross-compilation of the JDK sources. I'm
sure you can see that it wouldn't make sense to pass cross-compiler
options to the compilation of the build tools on the host build machine.
David is correct, these tools are handled differently due to being
compiled by the "build" compiler rather than the "target" compiler when
cross compiling. We haven't had the need to customize the compiler or
link args for these yet, but I don't see why there shouldn't be a
variable from configure that that would enable customization.
/Erik
David
-----
Example :
configure --with-extra-cflags=-DTESTMYEXTRAFLAGC
--with-extra-cxxflags=-DTESTMYEXTRAFLAGCXX
does not lead to the expected flags in the build for
genSocketOptionRegistry.c :
...
/usr/local/bin/gcc -DTHIS_FILE='"genSocketOptionRegistry.c"' -c -MMD
-MF
/mydir/open_jdk/jdk8/linuxx86_64_opt/jdk/gensrc/genSocketOptionRegistry/genSocketOptionRegistry.d
-o
/mydir/open_jdk/jdk8/linuxx86_64_opt/jdk/gensrc/genSocketOptionRegistry/genSocketOptionRegistry.o
/mydir/open_jdk/jdk8/openjdk8/jdk/src/share/native/sun/nio/ch/genSocketOptionRegistry.c
...
(while the flags show up for "normal" C/C++ files .)
Is there another option (available / planned?) to configure the
extra C/C++ compile flags for this special case ?
Thanks,
Matthias
