Re: libjava broken vs make -j?

[Andrew John Hughes <gnu_andrew at member dot fsf dot org>]

2009/8/26 David Daney <ddaney@caviumnetworks.com>:
> Dave Korn wrote:
>>
>> ÂI just started seeing this, with "make -j4":
>>
>>> make[4]: Leaving directory `/gnu/gcc/obj-java2/i686-pc-cygwin/boehm-gc'
>>> make[3]: Leaving directory `/gnu/gcc/obj-java2/i686-pc-cygwin/boehm-gc'
>>> make[2]: Leaving directory `/gnu/gcc/obj-java2/i686-pc-cygwin/boehm-gc'
>>> make[2]: Entering directory `/gnu/gcc/obj-java2/i686-pc-cygwin/libjava'
>>> : make ; exec make "AR_FLAGS=rc" "CC_FOR_BUILD=gcc-4" "CFLAGS=-g -O2"
>>> "CXXFLAGS=-g -O2" "CPPFLAGS=" "CFLAGS_FOR_BUILD=-g -O2"
>>> "CFLAGS_FOR_TARGET=-g -O2" "INSTALL=/usr/bin/install -c"
>>> "INSTALL_DATA=/usr/bin/install -c -m 644" "INSTALL_PROGRAM=/usr/bin/install
>>> -c" "INSTALL_SCRIPT=/usr/bin/install -c" "GCJFLAGS=-g -O2" "LDFLAGS="
>>> "LIBCFLAGS=-g -O2" "LIBCFLAGS_FOR_TARGET=-g -O2" "MAKE=make"
>>> "MAKEINFO=makeinfo --split-size=5000000 --split-size=5000000 " "PICFLAG="
>>> "PICFLAG_FOR_TARGET=" "SHELL=/bin/sh" "RUNTESTFLAGS="
>>> "exec_prefix=/opt/gcc-tools" "datadir=/opt/gcc-tools/share"
>>> "infodir=/opt/gcc-tools/share/info" "libdir=/opt/gcc-tools/lib"
>>> "mandir=/opt/gcc-tools/share/man" "prefix=/opt/gcc-tools"
>>> "gxx_include_dir=/opt/gcc-tools/lib/gcc/i686-pc-cygwin/4.5.0/include/c++"
>>> "AR=/opt/gcc-tools/i686-pc-cygwin/bin/ar" "AS=/gnu/gcc/obj-java2/./gcc/as"
>>> "LD=/gnu/gcc/obj-java2/./gcc/collect-ld" "LIBCFLAGS=-g -O2"
>>> "NM=/gnu/gcc/obj-java2/./gcc/nm" "PICFLAG="
>>> "RANLIB=/opt/gcc-tools/i686-pc-cyg
>
>> win/bin/ranlib" "DESTDIR="
>> "JAR=/gnu/gcc/obj-java2/i686-pc-cygwin/libjava/scripts/jar" DO=all multi-do
>>>
>>> make create-headers
>>> make[3]: Entering directory `/gnu/gcc/obj-java2/i686-pc-cygwin/libjava'
>>> make[3]: *** No rule to make target `classpath/lib/compile-classes',
>>> needed by `gcjh.stamp'. ÂStop.
>>> make[3]: Leaving directory `/gnu/gcc/obj-java2/i686-pc-cygwin/libjava'
>>> make[2]: *** [headers.stamp] Error 2
>>> make[2]: *** Waiting for unfinished jobs....
>>> make[3]: Entering directory `/gnu/gcc/obj-java2/i686-pc-cygwin/libjava'
>>
>> ÂThere is indeed no rule to make classpath/lib/compile-classes, as it's
>> generated in a recursive sub-make (which would happen earlier in a
>> non-parallel build, or at lower -j levels, rather than simultaneously and
>> racily as here). ÂPresumably we need to add some dependency at the top
>> level,
>> perhaps something like this?
>>
>> classpath/lib/compile-classes: all-multi
>>
>
> Interesting, I have been doing -j16, -j14, and -j2 builds and have not hit
> this.
>
> David Daney
>

I also do builds using -j9 and haven't seen such issues, but this is
on x86_64-pc-linux-gnu rather than cygwin.
-- 
Andrew :-)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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