Re: JNI dependent library symbols
Re: JNI dependent library symbols
- Subject: Re: JNI dependent library symbols
- From: Terry Lambert <email@hidden>
- Date: Thu, 19 Mar 2009 00:35:06 -0700
You may want to ask this question on a mailing list that deals with
Java, such as the java-dev mailing list, instead of cross-posting to
the darwin-dev and unix-porting lists, which normally have nothing to
do with Java.
-- Terry
On Mar 18, 2009, at 11:03 PM, Rohitash Panda wrote:
Hi,
I have some confusion regarding how dependent libraries of a native
library are treated on Mac OS X . I am on Mac OS X Leopard version
10.5.4 with JDK 1.4.2
I have a native library A which has a dependent library B . I see
that, even if the JNI library A gets loaded and is able to
successfuly load C , some sumbols which I should be seeing and which
are present in library B don't seem to be exported/un-available.
Using the verbose jni option provided I saw that after the native
library A is loaded by JAVA, the JNI symbols directly exported from
library A are resolved without any issues, but those are expected
from library B are not getting resolved . Is this a known problem
with this JDK version ?
Since the symbols from the dependent libraries of the native library
don't get exported in this case , then I guess the right way to fix
this is to change the linker directives when building the jnilib . I
am already using the flat-namespace option for Unix style loading/
resolving of symbols .
Going through the man pages of ld , I found a couple of options
which seem to be of relevance to the current context :
-reexport-lx
This is the same as the -lx but specifies that the
all symbols in library x should be avail-
able to clients linking to the library being
created. This was previously done with a sepa-
rate -sub_library option.
-reexport_library path_to_library
This is the same as listing a file name path to a
library on the link line and it specifies
that the all symbols in library path should be
available to clients linking to the library
being created. This was previously done with a
separate -sub_library option.
I am looking for comments from people who have faced this issue
earlier. Also , to add to this, I don't seem to hit upon this issue
using
JDK 1.5.
Appreciate any helpful comments.
Thanks.
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