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Date: Fri, 13 Nov 2009 11:33:00 -0000
From: Andrew Haley <aph@redhat.com>
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To: Jack Howarth <howarth@bromo.med.uc.edu>
CC: java@gcc.gnu.org
Subject: Re: building gcc against eclipse?
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Andrew Haley wrote:

> ecj1 is first built in libgcj (as ecjx) and then installed in the install dir.
> ecjx is renamed to ecj1 with:
> 
> if BUILD_ECJ1
> ## Undo any prepending of the target prefix and transform
> ## to the actual host's executable suffix.
> 	mv $(DESTDIR)$(libexecsubdir)/`echo ecjx | sed 's,^.*/,,;$(transform);s/$$/$(EXEEXT)/'` $(DESTDIR)$(libexecsubdir)/ecj1$(host_exeext)
> endif BUILD_ECJ1
> 
> If you want to replace ecjx with some shell script that runs eclipse-ecj.jar,
> replace this command with something appropriate.

Or (better) put a jar file containing org/eclipse/jdt/internal/compiler/batch/GCCMain.class
somwehere, and

In

if ENABLE_SHARED
## Use ecj.jar at runtime.
ecjx_LDFLAGS = $(ECJX_BASE_FLAGS) -Djava.class.path=$(ECJ_JAR)
else !ENABLE_SHARED
## Use ecj.jar at compile time.
ecjx_LDFLAGS = $(ECJX_BASE_FLAGS) $(ECJ_BUILD_JAR) -fbootclasspath=$(BOOTCLASSPATH)
endif !ENABLE_SHARED

replace the line

ecjx_LDFLAGS = $(ECJX_BASE_FLAGS) -Djava.class.path=$(ECJ_JAR)

with

ecjx_LDFLAGS = $(ECJX_BASE_FLAGS) -Djava.class.path=$(ECJ_JAR):/path/to/my/jarfile

Andrew.