RFR: 8227397: Add --with-extra-asflags configure option

Severin Gehwolf sgehwolf at redhat.com
Mon Jul 8 15:56:47 UTC 2019


Hi,

Could I please get a review for this patch which adds a new configure
option --with-extra-asflags? The issue at hand is that we, Red Hat,
need to pass certain extra flags to the assembler when OpenJDK is being
compiled. -Wa,--generate-missing-build-notes=yes in our case. That's
currently not possible and extra C/C++ flags would need to be used,
which seems not nice.

Bug: https://bugs.openjdk.java.net/browse/JDK-8227397
webrev: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8227397/01/webrev/

After this patch extra assembler flags get added to *.s/.S files for
libjvm.so:

$ grep -n generate-missing-build-notes=yes build/linux-x86_64-server-release/build.log 
1049: [18] ASFLAGS := -m64 -Wa,--generate-missing-build-notes=yes  
15005:( /usr/bin/rm -f /disk/openjdk/upstream-sources/openjdk-head/build/linux-x86_64-server-release/hotspot/variant-server/libjvm/objs/linux_x86_64.o.log && /usr/bin/gcc -c -m64 -Wa,--generate-missing-build-notes=yes -g -o /disk/openjdk/upstream-sources/openjdk-head/build/linux-x86_64-server-release/hotspot/variant-server/libjvm/objs/linux_x86_64.o /disk/openjdk/upstream-sources/openjdk-head/src/hotspot/os_cpu/linux_x86/linux_x86_64.s > >(/usr/bin/tee -a /disk/openjdk/upstream-sources/openjdk-head/build/linux-x86_64-server-release/hotspot/variant-server/libjvm/objs/linux_x86_64.o.log) 2> >(/usr/bin/tee -a /disk/openjdk/upstream-sources/openjdk-head/build/linux-x86_64-server-release/hotspot/variant-server/libjvm/objs/linux_x86_64.o.log >&2) || ( exitcode=$? && /usr/bin/cp /disk/openjdk/upstream-sources/openjdk-head/build/linux-x86_64-server-release/hotspot/variant-server/libjvm/objs/linux_x86_64.o.log /disk/openjdk/upstream-sources/openjdk-head/build/linux-x86_64-server-release/make-support/failure-logs/hotspot_variant-server_libjvm_objs_linux_x86_64.o.log && /usr/bin/cp /disk/openjdk/upstream-sources/openjdk-head/build/linux-x86_64-server-release/hotspot/variant-server/libjvm/objs/linux_x86_64.o.cmdline /disk/openjdk/upstream-sources/openjdk-head/build/linux-x86_64-server-release/make-support/failure-logs/hotspot_variant-server_libjvm_objs_linux_x86_64.o.cmdline && exit $exitcode ) )

I'll run this through jdk/submit before I push.

Thoughts?

Thanks,
Severin




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