Date: Tue, 5 Jul 2005 15:55:26 -0600 From: Tom Schutter <tom.schutter@gmail.com> To: freebsd-hackers@freebsd.org Subject: linking libjava.so RPATH problem Message-ID: <af36cf9705070514554e26356d@mail.gmail.com>
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I am having problems linking in the Java JVM libraries (libjava.so,
libverify.so, libjvm.so) into my executable.
With these options added to my gcc command:
-L/usr/local/jdk1.4.2/jre/lib/i386 -ljava -lverify
-L/usr/local/jdk1.4.2/jre/lib/i386/server -ljvm
It links ok, but when I try to run it I get:
$ ./testme
/libexec/ld-elf.so.1: Shared object "libjava.so" not found, required by
"testme"
At this point ldd tells me:
$ ldd testme
testme:
libm.so.3 =3D3D> /lib/libm.so.3 (0x2807c000)
libjava.so =3D3D> not found (0x0)
libverify.so =3D3D> not found (0x0)
libjvm.so =3D3D> not found (0x0)
libpthread.so.1 =3D3D> /usr/lib/libpthread.so.1 (0x28097000)
libc.so.5 =3D3D> /lib/libc.so.5 (0x280bb000)
Using -Xlinker -rpath -Xlinker PATH_TO_JRE_DIR, I can tell my executable to
look in the JRE dir for libjvm.so. I have verified that RPATH has been set
in the executable using objdump:
$ objdump -x testme | grep RPATH
RPATH /usr/local/jdk1.4.2/jre/lib/i386:/usr/local/jdk1.4.2/jre/lib/i=
386/server
But when I run the executable, it cannot find libjvm.so:
$ ./testme
/libexec/ld-elf.so.1: Shared object "libjvm.so" not found, required by
"libjava.so"
At this point ldd tells me:
$ ldd ./testme
./testme:
libm.so.3 =3D3D> /lib/libm.so.3 (0x2807c000)
libjava.so =3D3D> /usr/local/jdk1.4.2/jre/lib/i386/libjava.so (0x280=
97000)
libverify.so =3D3D> /usr/local/jdk1.4.2/jre/lib/i386/libverify.so
(0x280b5000)
libjvm.so =3D3D>
/usr/local/jdk1.4.2/jre/lib/i386/server/libjvm.so (0x280ca000)
libpthread.so.1 =3D3D> /usr/lib/libpthread.so.1 (0x28702000)
libc.so.5 =3D3D> /lib/libc.so.5 (0x28726000)
libjvm.so =3D3D> not found (0x0)
libverify.so =3D3D> not found (0x0)
libjvm.so =3D3D> not found (0x0)
libstdc++.so.4 =3D3D> /usr/lib/libstdc++.so.4 (0x28800000)
Note that at this point on Linux, testme runs ok.
If I set LD_LIBRARY_PATH, the libraries are found (no output is correct):
$ LD_LIBRARY_PATH=3D3D/usr/local/jdk1.4.2/jre/lib/i386:/usr/local/jdk1.4.2/=
jre/lib/i386/server
./testme
$
My questions are:
1) Why is the RPATH in the executable being ignored?
2) When I add the -rpath, I get two copies of a libjvm.so reference in test=
me,
one that resolves correctly, and one that doesn't. Why?
3) What is the correct way of linking in libjvm.so?
Thanks,
--=20
Tom Schutter
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