[H-GEN] Shared library loading
Michael Anthon
mca at tams.com.au
Fri Jun 4 00:11:49 EDT 1999
(Note reply-to: being general at humbug.org.au vs Michael Anthon <mca at tams.com.au>)
I am trying to get the Sybase CT libs compiled into PHP so that I can
attempt to access data on an existing MS SQL Server (don't ask) from PHP
scripts running on a Linux box. It all compiles ok, but when Apache tries
to load the libphp3.so modules, it exits with the following error....
bash> /etc/rc.d/init.d/httpd start
Syntax error on line 27 of /www/conf/httpd.conf:
Cannot load /www/libexec/libphp3.so into server: /www/libexec/libphp3.so:
undefined symbol: cs_dt_info
/etc/rc.d/init.d/httpd start: httpd could not be started
Now, we discovered that by using the LD_PRELOAD env variable, set as
follows, Apache will load the module
LD_PRELOAD=/usr/local/sybase/lib/libinsck.so.10:/usr/local/sybase/lib/libsyb
tcl.so.10:/usr/local/sybase/lib/libct.so.10:/usr/local/sybase/lib/libintl.so
.10:/usr/local/sybase/lib/libcomn.so.10:/usr/local/sybase/lib/libcs.so.10
This seems to be some sort of dynamic library loading problem. I currently
have the following lib files and links set up [1]
And the following [2] output from ldconfig indicates that it finds them OK.
Could anyone please point out what might be happening here and what I am
doing wrong? It's got me stumped.
Cheers
Michael A.
[1]
bash> ls -l /usr/local/sybase/lib/
total 1910
-rw-r--r-- 1 2677 200 76104 Jun 3 1995 libblk.a
-rwxr-xr-x 1 root root 75269 Feb 21 1996 libblk.so.10
-rw-r--r-- 1 2677 200 318634 Jun 3 1995 libcomn.a
lrwxrwxrwx 1 root root 13 Jun 4 13:56 libcomn.so ->
libcomn.so.10
-rwxr-xr-x 1 root root 306084 Feb 18 1996 libcomn.so.10
-rw-r--r-- 1 2677 200 52406 Jun 3 1995 libcs.a
lrwxrwxrwx 1 root root 33 Jun 4 14:01 libcs.so ->
/usr/local/sybase/lib/libcs.so.10
-rwxr-xr-x 1 root root 54479 Feb 18 1996 libcs.so.10
-rw-r--r-- 1 2677 200 407806 Jun 3 1995 libct.a
-rwxr-xr-x 1 root root 375190 Feb 18 1996 libct.so.10
-rw-r--r-- 1 2677 200 5546 Jun 16 1995 libinsck.a
-rw-r--r-- 1 2677 200 5848 Jun 3 1995 libinsck.async.a
lrwxrwxrwx 1 root root 14 Jun 4 13:57 libinsck.so ->
libinsck.so.10
-rwxr-xr-x 1 root root 8904 Feb 18 1996 libinsck.so.10
-rw-r--r-- 1 2677 200 32906 Jun 3 1995 libintl.a
lrwxrwxrwx 1 root root 13 Jun 4 13:57 libintl.so ->
libintl.so.10
-rwxr-xr-x 1 root root 33267 Feb 18 1996 libintl.so.10
-rw-r--r-- 1 2677 200 90230 Jun 3 1995 libsybtcl.a
lrwxrwxrwx 1 root root 15 Jun 4 13:58 libsybtcl.so ->
libsybtcl.so.10
-rwxr-xr-x 1 root root 83538 Feb 18 1996 libsybtcl.so.10
[2]
bash> ldconfig -p | grep sybase
libsybtcl.so.10 (ELF) => /usr/local/sybase/lib/libsybtcl.so.10
libsybtcl.so (ELF) => /usr/local/sybase/lib/libsybtcl.so
libintl.so.10 (ELF) => /usr/local/sybase/lib/libintl.so.10
libintl.so (ELF) => /usr/local/sybase/lib/libintl.so
libinsck.so.10 (ELF) => /usr/local/sybase/lib/libinsck.so.10
libinsck.so (ELF) => /usr/local/sybase/lib/libinsck.so
libct.so.10 (ELF) => /usr/local/sybase/lib/libct.so.10
libcs.so.10 (ELF) => /usr/local/sybase/lib/libcs.so.10
libcs.so (ELF) => /usr/local/sybase/lib/libcs.so
libcomn.so.10 (ELF) => /usr/local/sybase/lib/libcomn.so.10
libcomn.so (ELF) => /usr/local/sybase/lib/libcomn.so
libblk.so.10 (ELF) => /usr/local/sybase/lib/libblk.so.10
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