RFD: Precompile ecj [Was Re: GCCMain not found & test suite errors fatal?]

[David Daney]

Andrew Haley wrote:
> This makes ecj1 (and therefore gcj with Java source) much faster but
> takes 1m30s of CPU on a very fast computer.  It doesn't really seem to
> make the build longer on a multi-CPU box, since it runs in parallel with
> the rest of the build AFAICS.  Do you think we can get away with this?
> 

Seems reasonable to me.


> Andrew.
> 
> 
> 2010-01-06  Andrew Haley  <aph@redhat.com>
> 
> 	* Makefile.am (ecjx_LDFLAGS): Always precompile AWT.


This changelog mentions AWT.  Is that correct?



> 
> Index: Makefile.am
> ===================================================================
> --- Makefile.am (revision 155475)
> +++ Makefile.am (working copy)
> @@ -1075,30 +1075,20 @@
> 
>  ## Build an ecjx from a .jar.
>  ecjx_SOURCES = ecjx.cc
> -## We use the BC ABI here so that we don't need to compile ecj.jar.
> -## Hopefully the user has compiled it into his system .db.
> -## However, even if not it will run reasonably quickly.
> -
>  ECJX_BASE_FLAGS = -findirect-dispatch \
>         --main=org.eclipse.jdt.internal.compiler.batch.GCCMain
> 
>  if NATIVE
> 
>  ecjx_LINK = $(GCJLINK) $(ecjx_LDFLAGS)
> -
> -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
> -
>  ecjx_LDADD = -L$(here)/.libs $(extra_ldflags)
>  ecjx_DEPENDENCIES = libgcj.la libgcj.spec
>  if BUILD_SUBLIBS
>  ecjx_DEPENDENCIES += libgcj-noncore.la
> +
>  endif
> +
>  if USE_LIBGCJ_BC
>  ecjx_DEPENDENCIES += libgcj_bc.la
>  else
>