Compiling java without boehm-gc

[Dmitrijs Ledkovs <dmitrij dot ledkov at ubuntu dot com>]

Is it supported to build java without gc? Tried with 4.4 ubuntu
patched sources and gcc trunk svn 162241.

I have only found references with gcc 3.2 with similar attempts.

I want this to build a java cross-compiler to x86_64-w64-mingw32 and
current boehm-gc from gcc sources fails to compile for that.

The example below is the minimal native build which also fails exactly the same.

Building like so:

  $ ../gcc/configure --enable-languages=java --enable-java-gc=no

Fails like so:

libtool: compile:  /home/tdlk/src/bzr-mirrors/build-162241/./gcc/xgcc
-shared-libgcc -B/home/tdlk/src/bzr-mirrors/build-162241/./gcc
-nostdinc++ -L/home/tdlk/src/bzr-mirrors/build-162241/i686-pc-linux-gnu/libstdc++-v3/src
-L/home/tdlk/src/bzr-mirrors/build-162241/i686-pc-linux-gnu/libstdc++-v3/src/.libs
-B/usr/local/i686-pc-linux-gnu/bin/
-B/usr/local/i686-pc-linux-gnu/lib/ -isystem
/usr/local/i686-pc-linux-gnu/include -isystem
/usr/local/i686-pc-linux-gnu/sys-include -DHAVE_CONFIG_H -I.
-I../../../gcc/libjava -I./include -I./gcj -I../../../gcc/libjava
-Iinclude -I../../../gcc/libjava/include
-I../../../gcc/libjava/classpath/include -Iclasspath/include
-I../../../gcc/libjava/classpath/native/fdlibm
-I../../../gcc/libjava/libltdl -I../../../gcc/libjava/libltdl
-I../../../gcc/libjava/.././libjava/../gcc
-I../../../gcc/libjava/../zlib
-I../../../gcc/libjava/../libffi/include -I../libffi/include -fno-rtti
-fnon-call-exceptions -fdollars-in-identifiers -Wswitch-enum
-D_FILE_OFFSET_BITS=64 -ffloat-store -fomit-frame-pointer -Usun
-Wextra -Wall -D_GNU_SOURCE -DPREFIX=\"/usr/local\"
-DTOOLEXECLIBDIR=\"/usr/local/lib\" -DJAVA_HOME=\"/usr/local\"
-DBOOT_CLASS_PATH=\"/usr/local/share/java/libgcj-4.6.0.jar\"
-DJAVA_EXT_DIRS=\"/usr/local/share/java/ext\"
-DGCJ_ENDORSED_DIRS=\"/usr/local/share/java/gcj-endorsed\"
-DGCJ_VERSIONED_LIBDIR=\"/usr/local/lib/gcj-4.6.0-12\"
-DPATH_SEPARATOR=\":\" -DECJ_JAR_FILE=\"\"
-DLIBGCJ_DEFAULT_DATABASE=\"/usr/local/lib/gcj-4.6.0-12/classmap.db\"
-DLIBGCJ_DEFAULT_DATABASE_PATH_TAIL=\"gcj-4.6.0-12/classmap.db\" -g
-O2 -D_GNU_SOURCE -MT link.lo -MD -MP -MF .deps/link.Tpo -c
../../../gcc/libjava/link.cc  -fPIC -DPIC -o .libs/link.o
../../../gcc/libjava/link.cc:29:16: fatal error: gc.h: No such file or directory
compilation terminated.
make[3]: *** [link.lo] Error 1
make[3]: Leaving directory
`/home/tdlk/src/bzr-mirrors/build-162241/i686-pc-linux-gnu/libjava'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory
`/home/tdlk/src/bzr-mirrors/build-162241/i686-pc-linux-gnu/libjava'
make[1]: *** [all-target-libjava] Error 2
make[1]: Leaving directory `/home/tdlk/src/bzr-mirrors/build-162241'
make: *** [all] Error 2