Upgraded to Fedora 27, and tdbcmysql stopped working...

[Georgios Petasis]

Hi all,

I have upgraded my linux from Fedora 26 to 27, and I am facing problems
with tdbcmysql:

Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) where
#0 0x0000000000000000 in ?? ()
#1 0x00007fffe8a031a8 in ConfigureConnection (cdata=0x2956760,
interp=0x611800, objc=13, objv=0x61e618, skip=3)
at ./generic/tdbcmysql.c:1278
#2 0x00007fffe8a03695 in ConnectionConstructor (clientData=0x153a990,
interp=0x611800, context=0x61e6b0, objc=13, objv=0x61e618)
at ./generic/tdbcmysql.c:1417
#3 0x00007ffff7b6b13d in TclOO_Class_Create ()
from
/home/tcl/bawt/BawtBuild/Linux/x64/Release/Install/Tcl/lib/libtcl8.7.so
#4 0x00007ffff7b69526 in TclOOObjectCmdCore ()
from
/home/tcl/bawt/BawtBuild/Linux/x64/Release/Install/Tcl/lib/libtcl8.7.so
#5 0x00007ffff7a641d6 in TclNRRunCallbacks ()
from
/home/tcl/bawt/BawtBuild/Linux/x64/Release/Install/Tcl/lib/libtcl8.7.so
#6 0x00007ffff7a65e87 in TclEvalEx ()
from
/home/tcl/bawt/BawtBuild/Linux/x64/Release/Install/Tcl/lib/libtcl8.7.so
#7 0x00007ffff7b19150 in Tcl_FSEvalFileEx ()
from
/home/tcl/bawt/BawtBuild/Linux/x64/Release/Install/Tcl/lib/libtcl8.7.so
#8 0x00007ffff7b2066b in Tcl_MainEx ()
from
/home/tcl/bawt/BawtBuild/Linux/x64/Release/Install/Tcl/lib/libtcl8.7.so
#9 0x00000000004007c4 in main ()
(gdb)

I am suspecting that something is wrong with stubs. I suspect that the
code cannot load the mysql libraries. Anyone facing similar problems?

George

[Georgios Petasis]

If I change file mysqlStubInit.c to also accept libmariadb.so.3, it works:

static const char *const mysqlStubLibNames[] = {
/* @LIBNAMES@: DO NOT EDIT THESE NAMES */
"mysqlclient_r", "mysqlclient", "mysql", "mariadb", NULL
/* @END@ */
};

/* ABI Version numbers of the MySQL API that we can cope with */

static const char mysqlSuffixes[][5] = {
"", ".18", ".17", ".16", ".15", ".3"
};

...

status = Tcl_LoadFile(interp, path, mysqlSymbolNames, 0,
&mysqlStubsTable, &handle);
printf("%d -> %s\n", status, Tcl_GetString(path));

Gives:

1 -> libmysqlclient_r.so
1 -> libmysqlclient_r.so.18
1 -> libmysqlclient_r.so.17
1 -> libmysqlclient_r.so.16
1 -> libmysqlclient_r.so.15
1 -> libmysqlclient_r.so.3
1 -> libmysqlclient.so
1 -> libmysqlclient.so.18
1 -> libmysqlclient.so.17
1 -> libmysqlclient.so.16
1 -> libmysqlclient.so.15
1 -> libmysqlclient.so.3
1 -> libmysql.so
1 -> libmysql.so.18
1 -> libmysql.so.17
1 -> libmysql.so.16
1 -> libmysql.so.15
1 -> libmysql.so.3
1 -> libmariadb.so
1 -> libmariadb.so.18
1 -> libmariadb.so.17
1 -> libmariadb.so.16
1 -> libmariadb.so.15
0 -> libmariadb.so.3

The directory containing libmariadb.so.3, also contains
libmysqlclient.so.18:

> ls -laF /usr/lib64/mysql/

-rwxr-xr-x. 1 root root 338792 ??? 6 02:22 libmariadb.so.3*
lrwxrwxrwx. 1 root root 15 ??? 6 02:18 libmysqlclient.so.18 ->
libmariadb.so.3*

But it is not loaded.

George