jdk8 extra c/cxx - flags settings (original) (raw)

Volker Simonis volker.simonis at gmail.com
Mon Dec 2 09:34:50 UTC 2013

Hi,

I've just created "configure needs a way to customize compiler/linker options for the "build" compiler" (https://bugs.openjdk.java.net/browse/JDK-8029375).

Matthias and I will work on a patch.

Regards, Volker

On Mon, Dec 2, 2013 at 9:27 AM, Erik Joelsson <erik.joelsson at oracle.com> wrote:

On 2013-11-29 14:56, Baesken, Matthias wrote:

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. Would this be done with another --with... configure option ? Should we provide a change for this ? Yes, it would. I would say the first step would be creating a bug for it. Of course providing a patch will make it more likely to be fixed sooner too. /Erik Matthias -----Original Message----- From: Erik Joelsson [mailto:erik.joelsson at oracle.com] Sent: Montag, 25. November 2013 10:37 To: David Holmes; Baesken, Matthias Cc: build-dev at openjdk.java.net Subject: Re: jdk8 extra c/cxx - flags settings 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 -DTHISFILE='"genSocketOptionRegistry.c"' -c -MMD -MF /mydir/openjdk/jdk8/linuxx8664opt/jdk/gensrc/genSocketOptionRegistry/genSocketOptionRegistry.d -o /mydir/openjdk/jdk8/linuxx8664opt/jdk/gensrc/genSocketOptionRegistry/genSocketOptionRegistry.o /mydir/openjdk/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

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