Using SOCI (sql wrapper) on Xubuntu, simple program fails while compilig - c++

Question

I want to finally get to know how to write an application which uses database. I chose C++, PostgreSQL and SOCI (SQL wrapper to C++). I use Xubuntu 11.4 and installed everyting which was necessary to run a simple program.
To use SOCI I installed:
1) libboost-dev
2) libpq-dev
3) libtool
4) SOCI, using this: http://soci.sourceforge.net/doc/backends/postgresql.html#required and I compiled SOCI with this command: cmake cmake -G "Unix Makefiles" -DWITH_BOOST=ON -DWITH_POSTGRESQL=ON ../
My simple program is veeery simple:
#include "soci-postgresql.h"
int main(int argc, char **argv){
soci::session sql(postgresql, "testDB");
return 0;
}
I compile it like this:
g++ test.cpp -lsoci_core -lsoci_postgresql -ldl -lpq
but it gives me error:
test.cpp:1:29: fatal error: soci-postgresql.h: No such file or
directory compilation terminated.
How to fix this, whats wrong? Did I miss to install something?
Some more infos:
/usr/local/include/soci$ ls
backend-loader.h postgresql soci-platform.h
blob-exchange.h prepare-temp-type.h soci-simple.h
blob.h procedure.h statement.h
boost-fusion.h ref-counted-prepare-info.h transaction.h
boost-gregorian-date.h ref-counted-statement.h type-conversion.h
boost-optional.h row-exchange.h type-conversion-traits.h
boost-tuple.h row.h type-holder.h
connection-pool.h rowid-exchange.h type-ptr.h
empty rowid.h unsigned-types.h
error.h rowset.h use.h
exchange-traits.h session.h use-type.h
into.h soci-backend.h values-exchange.h
into-type.h soci-config.h values.h
once-temp-type.h soci.h version.h
/usr/local/include/soci/postgresql$ ls
common.h soci-postgresql.h
/usr/local/lib$ ls
libCOS4.a libomniORB4.so.1
libCOS4.so libomniORB4.so.1.6
libCOS4.so.1 libomnithread.a
libCOS4.so.1.6 libomnithread.so
libCOSDynamic4.a libomnithread.so.3
libCOSDynamic4.so libomnithread.so.3.4
libCOSDynamic4.so.1 libsoci_core.a
libCOSDynamic4.so.1.6 libsoci_core.so
libomniCodeSets4.a libsoci_core.so.3.1
libomniCodeSets4.so libsoci_core.so.3.1.0
libomniCodeSets4.so.1 libsoci_empty.a
libomniCodeSets4.so.1.6 libsoci_empty.so
libomniConnectionMgmt4.a libsoci_empty.so.3.1
libomniConnectionMgmt4.so libsoci_empty.so.3.1.0
libomniConnectionMgmt4.so.1 libsoci_postgresql.a
libomniConnectionMgmt4.so.1.6 libsoci_postgresql.so
libomniDynamic4.a libsoci_postgresql.so.3.1
libomniDynamic4.so libsoci_postgresql.so.3.1.0
libomniDynamic4.so.1 pkgconfig
libomniDynamic4.so.1.6 python2.7
libomniORB4.a python3.2
libomniORB4.so
I also tried this one: g++ test.cpp -lsoci_core -lsoci_postgresql -ldl -lpq -I /usr/local/include/soci/postgresql and got the error:
g++ test.cpp -lsoci_core -lsoci_postgresql -ldl -lpq -I
/usr/local/include/soci/postgresql In file included from test.cpp:1:0:
/usr/local/include/soci/postgresql/soci-postgresql.h:27:26: fatal
error: soci-backend.h: No such file or directory compilation
terminated.

Answer 1

g++ test.cpp -Iyour_soci_dir -lsoci_core -lsoci_postgresql -ldl -lpq
your_soci_dir is directory with installed soci include files.

Answer 2

You need to set the search path with -I option.
g++ test.cpp -lsoci_core -lsoci_postgresql -ldl -lpq -I<path to headers>
^^^^^^^^^^^^^^^^^ Put the path
You need to provide all paths. I guess in your case, it should be like this :
g++ test.cpp -lsoci_core -lsoci_postgresql -ldl -lpq -I/usr/local/include/soci/postgresql -I/usr/local/include/soci
There is also another option (which is more used in makefiles) : to use pkg-config. Here you can find such example :
PROGRAM = test
PROGRAM_FILES = test.c
CFLAGS += -g $(shell pkg-config --cflags xmlsec1-nss)
LDFLAGS += -g
LIBS += $(shell pkg-config --libs xmlsec1-nss)
all: $(PROGRAM)
%: %.c
$(cc) $(PROGRAM_FILES) $(CFLAGS) $(LDFLAGS) -o $(PROGRAM) $(LIBS)
clean:
#rm -rf $(PROGRAM)
In your case, it would be something like this (not tested) :
PROGRAM = test
PROGRAM_FILES = test.cpp
CC=g++
CXXFLAGS += -g $(shell pkg-config --cflags soci_core) $(shell pkg-config --cflags soci_postgresql)
LDFLAGS += -g
LIBS += $(shell pkg-config --libs soci_core) $(shell pkg-config --libs soci_postgresql)
all: $(PROGRAM)
%: %.cpp
$(CC) $(PROGRAM_FILES) $(CFLAGS) $(LDFLAGS) -o $(PROGRAM) $(LIBS)
clean:
#rm -rf $(PROGRAM)

Answer 3

Ok guys, I found a solution on a polish programming website.
My new code (socitest.cpp):
#include <iostream>
#include <soci.h>
#include <postgresql/soci-postgresql.h>
int main(int argc, char **argv)
{
try
{
soci::session sql(soci::postgresql, "dbname=testDB");
}
catch (soci::postgresql_soci_error const & e)
{
std::cerr << "PostgreSQL error: " << e.sqlstate() << " " << e.what() << std::endl;
}
catch (std::exception const & e)
{
std::cerr << "Some other error: " << e.what() << std::endl;
}
return 0;
}
And I have to compile it :
g++ socitest.cpp -lsoci_core -lsoci_postgresql -ldl -lpq -I
/usr/local/include/soci -I /usr/include/postgresql -o socitest
It should compile but it might not run. If it's not running, I have to do sth more:
1) create soci.conf file:
touch /etc/ld.so.conf.d/soci.conf
2) edit my soci.conf with gedit:
gedit /etc/ld.so.conf.d/soci.conf
3) paste in soci.conf:
/usr/local/lib64
(for Xubuntu x64) or
/usr/local/lib
(for Xubuntu x32) and save file
4) run command:
ldconfig
5) run my compiled socitest like this: ./socitest and it's wooooorking !!! :D
Thanks all of you for helping me:)

Answer 4

Above example code can be compiled with just one command, without soci.conf and ldconfig:
g++ socitest.cpp -o socitest -I/usr/include/postgresql -I/usr/local/include/soci -L/usr/local/lib64/ \
-lsoci_core -lsoci_postgresql -Wl,-rpath=/usr/local/lib64/
For 32 bit unix use /usr/local/lib instead of /usr/local/lib64