[Bug libgcj/28698] New: [gcj] libgcj-bc only used when building shared libs, not executables

[Bug libgcj/28698] New: [gcj] libgcj-bc only used when building shared libs, not executables

[debian-gcc at lists dot debian dot org]

seen on redhat/gcc-4_1-branch, should be seen on upcoming classpath-0.92 merge
as well.

building a shared library avoids the direct dependency on libgcj.so.7 (only
libgcj_gc.so.1 is referenced as NEEDED). 

i.e. gcj \
            -O2 -g -Wl,-Bsymbolic -shared -fPIC -fjni -findirect-dispatch \
            -o build/dist/ecj.jar.so build/dist/ecj.jar

ecj.jar.so doesn't depend on libgcj.so.7, while building an executable, i.e.

gcj \
           -O2 -g -Wl,-Bsymbolic -fPIC -fjni -findirect-dispatch \
           --main=org.eclipse.jdt.internal.compiler.batch.Main \
           -o build/dist/ecj-bootstrap-gcj build/dist/ecj.jar

still has the dependency on libgcj.so.7.

using the latter compiler is still faster than starting the interpreter and
using the precompiled jar file.

libjava/libgcj.spec does only rename the spec for linking shared libs, not for
linking executables.

  Matthias


-- 
           Summary: [gcj] libgcj-bc only used when building shared libs, not
                    executables
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcj
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698

[Bug libgcj/28698] [gcj] libgcj-bc only used when building shared libs, not executables

[tromey at gcc dot gnu dot org]

------- Comment #1 from tromey at gcc dot gnu dot org  2006-08-17 01:24 -------
For a simple example it does not do this:

opsy. gcj -O2 -fPIC -fjni -findirect-dispatch -o H --main=HelloWorld
HelloWorld.class
opsy. eu-readelf -d H|fgrep lib
  NEEDED            Shared library: [libgcc_s.so.1]
  NEEDED            Shared library: [libgcj_bc.so.1]
  NEEDED            Shared library: [libm.so.6]
  NEEDED            Shared library: [libpthread.so.0]
  NEEDED            Shared library: [librt.so.1]
  NEEDED            Shared library: [libdl.so.2]
  NEEDED            Shared library: [libc.so.6]

I wonder if something else is going on here... maybe some optimization
is generating a symbol that necessitates pulling in libgcj itself?
(I'm thinking of the builtins ... though I thought Andrew fixed these.
So, maybe that is wrong.)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698

[Bug libgcj/28698] [gcj] libgcj-bc only used when building shared libs, not executables

[doko at ubuntu dot com]

------- Comment #2 from doko at ubuntu dot com  2006-08-17 22:40 -------
ecj.jar is from eclipse-3.2, copied the file to
http://people.ubuntu.com/~doko/ecj.jar

gcj-4.2 -v \
            -O2 -g -Wl,-Bsymbolic -shared -fPIC -fjni -findirect-dispatch \
            -o /tmp/ecj.jar.so /usr/share/java/ecj.jar
Using built-in specs.
Reading specs from /usr/lib/gcc/i486-linux-gnu/4.2.0/libgcj.spec
[...]
gcc version 4.2.0 20060817 (experimental) (Ubuntu 4.2-20060817-0ubuntu1)

gcj-4.2 -v \
            -O2 -g -Wl,-Bsymbolic -fPIC -fjni -findirect-dispatch \
            --main=org.eclipse.jdt.internal.compiler.batch.Main \
            -o /tmp/ecj /usr/share/java/ecj.jar
Using built-in specs.
Reading specs from /usr/lib/gcc/i486-linux-gnu/4.2.0/libgcj.spec
[...]

objdump -x /tmp/ecj.jar.so | grep NEEDED
  NEEDED      libgcc_s.so.1
  NEEDED      libgcj_bc.so.1
  NEEDED      libm.so.6
  NEEDED      libpthread.so.0
  NEEDED      librt.so.1
  NEEDED      libz.so.1
  NEEDED      libdl.so.2
  NEEDED      libc.so.6
objdump -x /tmp/ecj | grep NEEDED
  NEEDED      libgcc_s.so.1
  NEEDED      libgcj_bc.so.1
  NEEDED      libm.so.6
  NEEDED      libpthread.so.0
  NEEDED      librt.so.1
  NEEDED      libz.so.1
  NEEDED      libdl.so.2
  NEEDED      libc.so.6
  NEEDED      libgcj.so.8


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698

[Bug libgcj/28698] [gcj] libgcj-bc only used when building shared libs, not executables

[doko at ubuntu dot com]

------- Comment #3 from doko at ubuntu dot com  2006-08-18 11:38 -------
Created an attachment (id=12091)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12091&action=view)
example

more simple example from the gettext source, compiled with

gcj -C gnu/gettext/GetURL.java
gcj -v -fjni -findirect-dispatch gnu/gettext/GetURL.class
--main=gnu.gettext.GetURL -o gnu.gettext.GetURL


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698

[Bug libgcj/28698] [gcj] libgcj-bc only used when building shared libs, not executables

[tromey at gcc dot gnu dot org]

------- Comment #4 from tromey at gcc dot gnu dot org  2006-08-22 23:34 -------
Bryce pointed out that we need to deal with the primitive class
objects somehow.  Otherwise code like 'new int[5]' will pull in
libgcj.so.

I'll send a patch to the java-patches list.
Could you try it on your test cases?
I tried in on my copy of ecj.jar and verified that it works.


-- 

tromey at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |tromey at gcc dot gnu dot
                   |dot org                     |org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-08-22 23:34:30
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698

[Bug libgcj/28698] [gcj] libgcj-bc only used when building shared libs, not executables

[bryce at mckinlay dot net dot nz]

------- Comment #5 from bryce at mckinlay dot net dot nz  2006-08-22 23:45 -------
What does "ldd" on the  dummy (unversioned) libgcj_bc.so say? This library
should not be linked against libgcj.so, maybe it is being linked incorrectly.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698

[Bug libgcj/28698] [gcj] libgcj-bc only used when building shared libs, not executables

[debian-gcc at lists dot debian dot org]

------- Comment #6 from debian-gcc at lists dot debian dot org  2006-08-23 09:20 -------
There seems to be a mismatch in the installation of the unversioned
libgcj_bc.so in the fc rpm and the trunk. On the trunk, this library is created
using

  $(libgcj_bc_dummy_LINK) -xc /dev/null -Wl,-soname,libgcj_bc.so.1 \
  -o $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 -lgcj

where libgcj is the real libgcj.so, while in the spec file, a dummy libgcj.so
is created first.

  mkdir libgcj_bc
  gcc/xgcc -B gcc/ $OPT_FLAGS $LIBGCJ_BC_CFLAGS -shared -fpic -xc /dev/null \
      -o libgcj_bc/libgcj.so -Wl,-soname,libgcj.so.7rh -nostdlib
  gcc/xgcc -B gcc/ $OPT_FLAGS $LIBGCJ_BC_CFLAGS -shared -fpic
../libjava/libgcj_bc.c \
      -o libgcj_bc/libgcj_bc.so -Wl,-soname,libgcj_bc.so.1 libgcj_bc/libgcj.so
-shared-libgcc 

Although that code seems to be called for the biarch case only.

The ldd on libgcj.so shows the dependency on the real libgcj on the trunk, no
dependency with the code from the spec file.

  Matthias


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698

[Bug libgcj/28698] [gcj] libgcj-bc only used when building shared libs, not executables

[tromey at gcc dot gnu dot org]

------- Comment #7 from tromey at gcc dot gnu dot org  2006-08-23 16:58 -------
There's some kind of skew here... I took the code on the trunk
from the RH 4.1 branch, not from the FC RPM.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698

[Bug libgcj/28698] [gcj] libgcj-bc only used when building shared libs, not executables

[tromey at gcc dot gnu dot org]

------- Comment #8 from tromey at gcc dot gnu dot org  2006-08-31 17:24 -------
Subject: Bug 28698

Author: tromey
Date: Thu Aug 31 17:23:57 2006
New Revision: 116603

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=116603
Log:
        PR libgcj/28698:
        * libgcj_bc.c (DECLARE_PRIM_TYPE): New macro.  Declare primitive
        classes.

Modified:
    trunk/libjava/ChangeLog
    trunk/libjava/libgcj_bc.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698

[Bug libgcj/28698] [gcj] libgcj-bc only used when building shared libs, not executables

[tromey at gcc dot gnu dot org]

------- Comment #9 from tromey at gcc dot gnu dot org  2006-08-31 22:00 -------
Subject: Bug 28698

Author: tromey
Date: Thu Aug 31 22:00:06 2006
New Revision: 116607

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=116607
Log:
        PR libgcj/28698:
        * libgcj_bc.c (DECLARE_PRIM_TYPE): New macro.  Declare primitive
        classes.

Modified:
    branches/redhat/gcc-4_1-branch/libjava/ChangeLog
    branches/redhat/gcc-4_1-branch/libjava/libgcj_bc.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698

[Bug libgcj/28698] [gcj] libgcj-bc only used when building shared libs, not executables

[tromey at gcc dot gnu dot org]

------- Comment #10 from tromey at gcc dot gnu dot org  2006-09-01 16:16 -------
Subject: Bug 28698

Author: tromey
Date: Fri Sep  1 16:16:15 2006
New Revision: 116631

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=116631
Log:
        PR libgcj/28698:
        * libgcj_bc.c (DECLARE_PRIM_TYPE): New macro.  Declare primitive
        classes.

boehm-gc
        PR libgcj/13212:
        * configure.ac: Check for pthread_getattr_np(). Remove
        GC_PTHREAD_SYM_VERSION detection.
        * include/gc.h (GC_register_my_thread, GC_unregister_my_thread,
        GC_get_thread_stack_base): New declarations.
        * pthread_support.c (GC_register_my_thread, GC_unregister_my_thread,
        GC_get_thread_stack_base): New functions.
        (GC_delete_thread): Don't try to free the first_thread.
        * misc.c (GC_init_inner): Use GC_get_thread_stack_base() if possible.
        (pthread_create_, constr): Removed.
        (pthread_create): Don't rename.
        * include/gc_ext_config.h.in: Rebuilt.
        * include/gc_pthread_redirects.h (pthread_create): Define
        unconditionally.
        * include/gc_config.h.in: Rebuilt.
        * configure: Rebuilt.
libjava
        * java/lang/natThread.cc (_Jv_AttachCurrentThread): Attach thread
        to GC.
        (_Jv_DetachCurrentThread): Detach thread from GC.
        * include/boehm-gc.h (_Jv_GCAttachThread, _Jv_GCDetachThread):
        Declare.
        * boehm.cc (_Jv_GCAttachThread): New function.
        (_Jv_GCDetachThread): Likewise.

gcc/java/ChangeLog
        * jvspec.c (lang_specific_driver): Add -s-bc-abi when needed.
libjava/ChangeLog
        * configure, Makefile.in: Rebuilt.
        * Makefile.am (toolexeclib_LTLIBRARIES): Add libgcj_bc.la.
        (libgcj_bc_la_SOURCES): New variable.
        (libgcj_bc_la_LDFLAGS): Likewise.
        (libgcj_bc_la_LIBADD): Likewise.
        (libgcj_bc_la_DEPENDENCIES): Likewise.
        (libgcj_bc_la_LINK): Likewise.
        (libgcj_bc_dummy_LINK): Likewise.
        (libgcj_bc.la): New target.
        (install-exec-hook): Likewise.
        * libgcj.spec.in (*lib): Use LIBGCJ_SPEC.
        * libgcj_bc.c: New file.
        * configure.ac (LIBGCJ_SPEC): New subst.
        * configure.host (use_libgcj_bc): New variable.

Added:
    branches/gcj-eclipse/libjava/libgcj_bc.c
      - copied, changed from r116204, trunk/libjava/libgcj_bc.c
Modified:
    branches/gcj-eclipse/boehm-gc/ChangeLog
    branches/gcj-eclipse/boehm-gc/configure
    branches/gcj-eclipse/boehm-gc/configure.ac
    branches/gcj-eclipse/boehm-gc/dyn_load.c
    branches/gcj-eclipse/boehm-gc/include/gc.h
    branches/gcj-eclipse/boehm-gc/include/gc_config.h.in
    branches/gcj-eclipse/boehm-gc/include/gc_ext_config.h.in
    branches/gcj-eclipse/boehm-gc/include/gc_pthread_redirects.h
    branches/gcj-eclipse/boehm-gc/include/private/pthread_support.h
    branches/gcj-eclipse/boehm-gc/misc.c
    branches/gcj-eclipse/boehm-gc/os_dep.c
    branches/gcj-eclipse/boehm-gc/pthread_stop_world.c
    branches/gcj-eclipse/boehm-gc/pthread_support.c
    branches/gcj-eclipse/gcc/java/ChangeLog
    branches/gcj-eclipse/gcc/java/jvspec.c
    branches/gcj-eclipse/libjava/ChangeLog
    branches/gcj-eclipse/libjava/Makefile.am
    branches/gcj-eclipse/libjava/Makefile.in
    branches/gcj-eclipse/libjava/boehm.cc
    branches/gcj-eclipse/libjava/configure
    branches/gcj-eclipse/libjava/configure.ac
    branches/gcj-eclipse/libjava/configure.host
    branches/gcj-eclipse/libjava/gcj/Makefile.in
    branches/gcj-eclipse/libjava/include/Makefile.in
    branches/gcj-eclipse/libjava/include/boehm-gc.h
    branches/gcj-eclipse/libjava/java/lang/natThread.cc
    branches/gcj-eclipse/libjava/libgcj.spec.in
    branches/gcj-eclipse/libjava/testsuite/Makefile.in


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28698