hi,
I'm tying to run the simple1.cc example, I can connect to the database,
but I have segmentation fault.
I've compiled the mysql++-1.7.31.tar.gz <releases/mysql++-1.7.31.tar.gz>
source library on this system:
gcc 3.2.3
mysql server 4.0.22
Red hat enterprise 2.4.21
All is ok.
But when I run the example, I obtain "segmentation fault" at the
following line:
Result res = query.store();

Please, can you tell me how to solve this problem?
thank you
Marco




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no... I'm running only the simple1.cc.

my goal is to embed the basic commands in my software, but before I'd
like to run and understand how these commands work.
So I take the simple1.cc and compile it stand alone.
I've built using the following gcc comand:
g++ -I/usr/include/mysql++ -I/usr/local/mysql/include/mysql
-DVERBOSE=2 -Wall -pthread -g -O2 -c simple1.cc
g++ -I/usr/include/mysql++ -I/usr/local/mysql/include/mysql
-DVERBOSE=2 -Wall -pthread -g -O2 -c util.cc -o util.o
g++ -pthread -g -O2 -L/usr/lib/mysql util.o simple1.o
/usr/local/lib/libmysqlpp.so -lz /usr/lib/mysql/libmysqlclient_r.a
-lcrypt -lnsl -lm -lpthread -lc -lnss_files -lnss_dns -lresolv
/usr/lib/libefence.a -Wl,--rpath -Wl,/usr/local/lib -Wl,--rpath
-Wl,/usr/local/lib -o simple1


thank you
MArco




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I've forgotten to say, that
1)I've created a database in mysql using mysql line commands
2)I've filled this database
3)I've changed the name of database inside util.cc.
thank you
Marco

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Marco Turchi wrote:

You must run resetdb first, as explained in examples/README. If you
don't run it first, simple1 has no data to operate on.

No doubt it could fail in a more graceful manner, but when you go and
ignore the short README file we've prepared I can't say I have much
sympathy.

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Marco Turchi wrote:

Get the examples working first, then branch out into your own project.
It's easier to help you if you're using a data set and programs that
we're familiar with.

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perfect... I've ran the example resetdb in the following way:
../resetdb host user psw
but I obtain:
Bad argument count: 0!
Segmentation fault

It seems that resetdb can not pass the argc and argv to connect_to_db
method.

Marco

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On Wed, Mar 09, 2005 at 11:43:48AM -0800, Marco Turchi wrote:
Could you post a backtrace of the core dump? Also, just to be certain,
make sure that there are no other mysqlpp libs. (check
'ldd lib/.libs/resetdb' and see where it's getting the libraries.

- Chris


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Chris Frey wrote:

ldd examples/.libs/resetdb

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ldd .libs/resetdb
libmysqlpp.so.4 => /usr/local/lib/libmysqlpp.so.4 (0x00829000)
libz.so.1 => /usr/lib/libz.so.1 (0x00f89000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x003c1000)
libnsl.so.1 => /lib/libnsl.so.1 (0x00275000)
libpthread.so.0 => /lib/i686/libpthread.so.0 (0x0099e000)
libnss_files.so.2 => /lib/libnss_files.so.2 (0x00bec000)
libnss_dns.so.2 => /lib/libnss_dns.so.2 (0x00111000)
libresolv.so.2 => /lib/libresolv.so.2 (0x00ef2000)
libstdc++.so.5 => /usr/lib/libstdc++.so.5 (0x0061a000)
libm.so.6 => /lib/i686/libm.so.6 (0x00116000)
libc.so.6 => /lib/i686/libc.so.6 (0x00a70000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00cdb000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x00502000)


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On Wed, Mar 09, 2005 at 04:43:19PM -0800, Marco Turchi wrote:
Do you have a backtrace? If using bash:

export LD_LIBRARY_PATH=/path/to/mysql++/tarball/lib/.libs
ulimit -c unlimited
examples/.libs/resetdb
gdb examples/.libs/resetdb core
- Chris


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