--
+If you plan to modify a .java file, you will need to configure with
+--enable-java-maintainer-mode. In order to make this work properly,
+you will need to have 'ecj1' and 'gjavah' executables in your PATH at
+build time.
+
+One way to do this is to download ecj.jar (see contrib/download_ecj)
+and write a simple wrapper script like:
+
+ #! /bin/sh
+ gij -cp /home/tromey/gnu/Generics/trunk/ecj.jar \
+ org.eclipse.jdt.internal.compiler.batch.GCCMain \
+ ${1+"$@"}
+
+For gjavah, you can make a tools.zip from the classes in
+classpath/lib/tools/ and write a gjavah script like:
+
+ #! /bin/sh
+ dir=/home/tromey/gnu/Generics/Gcjh
+ gij -cp $dir/tools.zip \
+ gnu.classpath.tools.javah.Main \
+ ${1+"$@"}
+
+Another way to get a version of gjavah is to first do a
+non-maintainer-mode build and use the newly installed gjavah.
+
+--
+
+To regenerate libjava/configure, first run aclocal passing the flags
+found near the top of Makefile.am, then autoconf. H. J. Lu writes that
+this can be done using these commands:
+
+ cd libjava &&
+ rm -f aclocal.m4 &&
+ ACFLAGS=$(grep "^ACLOCAL_AMFLAGS" Makefile.in | sed -e "s/ACLOCAL_AMFLAGS[ \t ]*=//") &&
+ aclocal-1.9 $ACFLAGS &&
+ rm -f configure &&
+ autoconf-2.59 &&
+ rm -fr autom4te.cache
+
+See the GCC documentation which auto* versions to use.
+
+--
+
libgcj uses GNU Classpath as an upstream provider. Snapshots of
Classpath are imported into the libgcj source tree. Some classes are
overridden by local versions; these files still appear in the libgcj
cd .../classpath
cp ../../lt* .
cp ../../config.sub ../../config.guess .
- aclocal -I m4 -I ../..
+ aclocal -I m4 -I ../.. -I ../../config
autoconf
autoheader
automake
cd ..
scripts/makemake.tcl > sources.am
automake
+- Remove the generated class and header files:
+ find classpath -name '*.class' xargs -r rm -f
+ find gnu java javax org sun -name '*.h' \
+ | xargs -r grep -Fl 'DO NOT EDIT THIS FILE - it is machine generated' \
+ | xargs -r rm -f
- Build, fix, till everything works.
+ Be sure to build all peers (--enable-java-awt=gtk,xlib,qt
+ --enable-gconf-peer --enable-gstreamer-peer)
+ Be sure to update gnu/classpath/Configuration.java to reflect
+ the new version
Possibly update the gcj/javaprims.h file with scripts/classes.pl
(See below, it can only be done after the first source->bytecode
pass has finished.)
+ You will need to configure with --enable-java-maintainer-mode and you
+ will need to update the .class files and generated CNI header files in
+ your working tree
+- Add/Remove newly generated files:
+ - svn status classpath | grep '^\!.*\.class$' | cut -c8- | xargs svn remove
+ - svn status classpath | grep '^\?' | cut -c8- | xargs svn add
+ - svn status gnu java javax org sun | grep '^\!.*\.h$' | cut -c8- | xargs svn remove
+ - svn status gnu java javax org sun | grep '^\?' | cut -c8- | xargs svn add
Over time we plan to remove as many of the remaining divergences as
possible.
In general you should not make any changes in the classpath/
directory. Changes here should come via imports from upstream.
-However, there are two (known) exceptions to this rule:
+However, there are three (known) exceptions to this rule:
* In an emergency, such as a bootstrap breakage, it is ok to commit a
patch provided that the problem is resolved (by fixing a compiler
* On a release branch to fix a bug, where a full-scale import of
Classpath is not advisable.
+* We maintain a fair number of divergences in the build system.
+ This is a pain but they don't seem suitable for upstream.
+
--
You can develop in a GCC tree using a CVS checkout of Classpath, most
at that point. This must be run from the build tree, in
<build>/classpath/lib; it uses the .class file name to determine
what to print.
-
-If you're generating a patch there is a program you can get to do an
-offline `cvs add' (it will fake an `add' if you don't have write
-permission yet). Then you can use `cvs diff -N' to generate the
-patch. See http://www.red-bean.com/cvsutils/
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