Re: error trying to exec 'ecj1': execvp: No such file or directory

2011/6/3 Dr Andrew John Hughes <[email protected]>:
> On 21:42 Fri 03 Jun     , Jie Liu wrote:
>> Hi,
>>
>> I am trying to port gcj to RTEMS now and have got boehm-gc, libffi,
>> libjava compiled for RTEMS. But when I try to use i386-rtems-gcj to
>> compile HelloWorld for RTEMS after install, I got "error trying to
>> exec 'ecj1': execvp: No such file or directory" and don't know how to
>> fix it. Could somebody give me an help hand or an advice ? Very
>> Thanks.
>>
>> The error information can be seen below:
>> i386-rtems-gcj -v --main=HelloWorld HelloWorld.java -o Hello
>> Using built-in specs.
>> Reading specs from /mnt/gcj/mytoolchain/lib/gcc/i386-rtems/4.7.0/libgcj.spec
>> rename spec startfile to startfileorig
>> rename spec lib to liborig
>> COLLECT_GCC=i386-rtems-gcj
>> COLLECT_LTO_WRAPPER=/mnt/gcj/mytoolchain/libexec/gcc/i386-rtems/4.7.0/lto-wrapper
>> Target: i386-rtems
>> Configured with: ../gcc-trunk/configure --enable-threads=rtems
>> --with-gnu-as --enable-multilib --enable-newlib-mb
>> --enable-newlib-iconv --with-gnu-ld --with-newlib --verbose
>> --with-system-zlib --disable-nls
>> --enable-version-specific-runtime-libs --enable-languages=c,c++,java
>> --target=i386-rtems --prefix=/mnt/gcj/mytoolchain/
>> --with-gmp=/mnt/gcj/gcj-rtems-work/gmpmpfrmpc
>> --with-mpfr=/mnt/gcj/gcj-rtems-work/gmpmpfrmpc
>> --with-mpc=/mnt/gcj/gcj-rtems-work/gmpmpfrmpc
>> Thread model: rtems
>> gcc version 4.7.0 20110409 (experimental) (GCC)
>> COLLECT_GCC_OPTIONS='-fsaw-java-file' '-v' '-o' 'Hello'
>> '-fbootclasspath=./:/mnt/gcj/mytoolchain/share/java/libgcj-4.7.0.jar'
>> '-g1' '-mtune=i386' '-march=i386'
>>  ecj1 HelloWorld.java -g1
>> -fbootclasspath=./:/mnt/gcj/mytoolchain/share/java/libgcj-4.7.0.jar
>> -g1 -fsource=1.5 -ftarget=1.5 -fzip-dependency /tmp/ccuWIrFF.zip
>> -fzip-target /tmp/cc7in4l3.jar
>> i386-rtems-gcj: error trying to exec 'ecj1': execvp: No such file or directory
>> make: *** [Hello] Error 1
>>
>> Best Regards,
>> Jie
>
> Did you supply the build with an ecj.jar?  contrib/download_ecj will obtain one
> for you.  ecj1 is a natively compiled ecj binary used by gcj to compile Java
> source code to bytecode:
>
> $ file /home/andrew/build/gcj/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/ecj1
> /home/andrew/build/gcj/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/ecj1: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.9, not stripped
>
> --
> Andrew :)
>
> Free Java Software Engineer
> Red Hat, Inc. (http://www.redhat.com)
>
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Thank you very much, Andrew. :)
I have got my cross ecj1 under your help.
[rtems@localhost libjava]$ file
/mnt/gcj/mytoolchain/libexec/gcc/i386-rtems/4.7.0/ecj1
/mnt/gcj/mytoolchain/libexec/gcc/i386-rtems/4.7.0/ecj1: ELF 32-bit LSB
executable, Intel 80386, version 1 (SYSV), dynamically linked (uses
shared libs), for GNU/Linux 2.6.32, not stripped

But when I run this ecj1, an error occurred:
[rtems@localhost libjava]$
/mnt/gcj/mytoolchain/libexec/gcc/i386-rtems/4.7.0/ecj1
Exception in thread "main" java.lang.NoClassDefFoundError:
org.eclipse.jdt.internal.compiler.batch.GCCMain
   at gnu.java.lang.MainThread.run(libgcj.so.11)
Caused by: java.lang.ClassNotFoundException:
org.eclipse.jdt.internal.compiler.batch.GCCMain not found in
gnu.gcj.runtime.SystemClassLoader{urls=[file:./],
parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
   at java.net.URLClassLoader.findClass(libgcj.so.11)
   at gnu.gcj.runtime.SystemClassLoader.findClass(libgcj.so.11)
   at java.lang.ClassLoader.loadClass(libgcj.so.11)
   at java.lang.ClassLoader.loadClass(libgcj.so.11)
   at gnu.java.lang.MainThread.run(libgcj.so.11)
While the local ecj1 is running well :
[rtems@localhost test]$ /usr/libexec/gcc/i686-redhat-linux/4.5.1/ecj1
[rtems@localhost test]$

Is there someone who has encountered the same question? Any reply will
be welcome.

Best Regards,
Jie