Am 17.04.24 um 22:46 schrieb Michael Osipov:
On 2024/04/17 14:21:06 Rainer Jung wrote:
Am 17.04.24 um 15:34 schrieb Michael Osipov:
Rainer, I do not fully understand the problem here. We use libtool to solve
exactly this problem with versioned SONAMEs. It will create symlinks to the
SONAME.
Do you expect anyone even with dlopen() to load libfoo.o.{SOVERSION} unless it
is strictly needed?
E.g.:
lrwxr-xr-x 1 root wheel 26 2024-03-22 10:20 /usr/lib/libcrypto.so@ ->
../../lib/libcrypto.so.111
lrwxr-xr-x 1 root wheel 13 2024-03-22 10:20 /usr/lib/libssl.so@ ->
libssl.so.111
-r--r--r-- 1 root wheel 608008 2024-03-22 10:20 /usr/lib/libssl.so.111
and so on...
Yes, I expect that! anyone is the JVM :(
The problem is, that the Java API does not care about these well thought
native traditions. You can not open libssl.so.3 using
System.loadlibrary(String name), because whatever you give it as "name"
parameter it will always try to open libname.so. It always prepends
"lib" to name and always suffixes it with plain ".so".
Yes, it might exist as the first in your list of symlinks, but on most
linux distributions this link is not installed by default, because it is
only needed when doing compilations. So it is only installed when you
install development packages for libs.
Ah, now I see your problem, but it looks like a downstream problem of your
distro of choice, no? I wonder how you compile then custom software if .so
isn't present and the linker cannot find it with -L? What if you install the
devel package to have .so link?
I think it is not a distro problem, but a explicit decision I like. I
find it normal, that you separate development packages from production
packages and only install development packages on development systems,
not on production system. Here a development file is needed for a
production process :(
In old times for instance it was forbidden to install a compiler on a
production system. Yeah I know, once Java kicked in this rule was no
longer possible in the Java world. But in the native world it is often
still followed. So if there is no native compiler, you don't need the
devel version of the libraries as well.
Best regards,
Rainer
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