I am porting a multi-threaded MySQL client application that is currently
working fine on my development Solaris box to multiple platforms.
For some reason that I cannot figure out, my autoconf script is
failing on Linux looking for the mysql_thread_init() function in
libmysqlclient_r. From the config.log, I see that the simple test
program is:
int main () {
mysql_thread_init();
return 0;
}
To determine why it was failing, I tried compiling this simple program
on my Solaris 2.7 machine, linking with -lpthread and -lmysqlclient_r:
gcc abc.c -o abc -lpthread -lmysqlclient_r
It compiles fine on Solaris 2.7. On my Red Hat 7.2 (kernel 2.4.18)
machine, I have compiled and installed MySQL 3.23.51 with the
"--enable-thread-safe-client" configure option. When I try to
compile the exact same program, I get a linker error:
/tmp/ccEsSfhd.o: In function `main':
/tmp/ccEsSfhd.o(.text+0x7): undefined reference to `mysql_thread_init'
The libmysqlclient_r library (libmysqlclient_r.so.10.0.0) does exist
and is obviously being found (otherwise I would get a library not found
error when specifying -lmysqlclient_r).
So, I cannot determine why on Linux, after I have built the thread-safe
library, the linker still cannot find mysql_thread_init. Any suggestions
very welcomed. Thanks,
rob
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