On 12/21/2010 09:43 PM, Nicholas Miell wrote:
>
> ld.so isn't happy with that (lookups aren't based on filenames, so
> symlinks won't do anything and it will never find the library).
>
> You need to create an empty shared library with the
> libmysqlclient_r.so.16 SONAME that has a DT_AUXILIARY entry for
> libmysqlclient.so.16.
In theory, the following should produce a usable library:
eu-readelf -s /usr/lib64/mysql/libmysqlclient_r.so.16.0.0 |
./mysql_filter.gawk > hack.c
gcc $(rpm --eval %optflags) -fPIC -shared -fno-toplevel-reorder
-Wl,-soname,libmysqlclient_r.so.16 -Wl,--filter,libmysqlclient.so.16
hack.c -o libmysqlclient_r.so.16
but in practice, it gives me:
/usr/bin/ld: libmysqlclient_r.so.16: version node not found for symbol
sf_malloc_mem_limit@@libmysqlclient_16
/usr/bin/ld: failed to set dynamic section sizes: Bad value
collect2: ld returned 1 exit status
and nobody on the internet has any idea what that error means.
#!/usr/bin/gawk -f
BEGIN { seq = 0; }
/GLOBAL/ && !/UNDEF/ {
size = $3;
type = $4;
split($8, nv, "@@");
name = nv[1];
version = nv[2];
name_seq = sprintf("%s_%d", name, seq++);
if (name == "_init" || name == "_fini") {
next;
}
if (type == "FUNC") {
printf "void %s() { }\n", name_seq;
} else if (type == "OBJECT") {
printf "char %s[%s];\n", name_seq, size;
}
printf "asm(\".symver %s, %s@@%s\");\n\n", name_seq, name, version;
}
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