Problem with OCI call and how to install and use 'DEBUG_EXTPROC' on Linux

Question

Hi,
Can any one let me know how I can install and use this debug_extproc package. I have installed oracle XE server on Linux machine(32-bit).
When I use : DEBUG_EXTPROC.STARTUP_EXTPROC_AGENT' ... i get an error saying that : it is not declared.
I tried looking in all the directories but did not find the dbgextp.sql(which is required in order to install that package).And tried searching on google but could not get any relevant information.
Also I am newbie to OCI call interface and also to C programming too: I have coded a external procedure or custom user aggregate in C. But since I was using C++ : 'set' STL. I have compiled my program using g++ instead of gcc and I have correspondingly modified the make file in public/demo directory.
So, is it fine to do it that way: using OCI (instead of OCCI(C++)) but again compiling the pgm as a regular C++ using g++ instead of gcc.(But rest of the pgm including printf statements : everything is in C).
Also I have created the library from my : custagg.so library:
SQL> create or replace library custagg is '$ORACLE_HOME/lib/custagg.so'
But my aggregate function implemented as external C function using OCI is either not recognised or else : if recognized then there is some error because of which i am getting the following errors : ORA-06522
SQL> select MinDistance(TT) from egg1;
select MinDistance(TT) from egg1
ERROR at line 1:
ORA-06520: PL/SQL: Error loading external library
ORA-06522: /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/custagg.so:
cannot dynamically load executable
Please kindly answers my queries and trying to resolve this for almost 4 days now and could not find any clue on how to get this done.
Thanks,
-NN

Answer 1

#/bin/make
# Make file for OCI,OCCI and ODBC demos
# Usage :
# For compiling & linking the cdemo81.c file
# make -f demo_xe.mk buildoci CDEMOEXE=cdemo81 CDEMOOBJS=cdemo81.o
.SUFFIXES: .o .c .cpp
ICINCHOME=$(ORACLE_HOME)/rdbms/public/
ICLIBHOME=$(ORACLE_HOME)/lib
ICLIBPATH=-L$(ICLIBHOME)
THREADLIBS=-lthread
CCLIB=$(ICLIBPATH) -lclntsh $(THREADLIBS)
OCCILIB=$(ICLIBPATH) -locci -lclntsh $(THREADLIBS)
CCINCLUDES = -I$(ICINCHOME)
CCFLAGS=$(CCINCLUDES) -D_REENTRANT -g -xs
LDFLAGS=
SO_EXT=.so
EXTLDFLAGS=$(LDFLAGS) -shared
REMOVE=rm -rf
MKLINK=ln
MAKE=make
MAKEFILE=demo_xe.mk
CDEMOEXE=custagg.so
CDEMOOBJS=custagg.o
OCCIDEMO=occidml
OCCIOBJDEMO=occiobj
OTT=$(ORACLE_HOME)/bin/ott
OCCIOTTUSR=hr
OCCIOTTPWD=hr
ODBCDEMOEXE=odbcdemo
ODBCDEMOOBJS=odbcdemo.o
AQDEMOEXE=ociaqdemo00
AQDEMOOBJS=ociaqdemo00.o
EXTDEMO=extdemo2.so
CC=/usr/bin/g++
echo "LIBCLNT value is :" $(LIBCLNT)
echo "CC value is :" $(CC)
.c.o:
g++ -c -I$(ICINCHOME) $(CCFLAGS) $<
all: clean buildoci
echo "LIBCLNT value is :" $(LIBCLNT)
buildoci: $(LIBCLNT) $(CDEMOOBJS)
g++ -o $(CDEMOEXE) $(LDFLAGS) $(CDEMOOBJS) $(CCLIB)
echo "CC value is :" $(CC)
echo "LIBCLNT value is :" $(LIBCLNT)
clean:
$(REMOVE) $(CDEMOOBJS) $(CDEMOEXE)
# This port-specific file is currently empty on Solaris. Product
# lines may use this file to override compiler definitions and
# flags used in occi.mk.
# Linux compiler definitions
CC=/usr/bin/gcc
cc=/usr/bin/gcc
CCFLAGS=$(CCINCLUDES) -DLINUX -D_GNU_SOURCE -D_REENTRANT -g
LDFLAGS=-g
# This macro CCINCLUDES has to be redefined on Linux because of
# the existence of the 'new' directory in t_work. The name new
# clashes with a system header file.
CCINCLUDES = -idirafter .
THREADLIBS=-lpthread
ifdef BUILD_CCC296
CC=/usr/bin/g++296
endif
And I am executing the make file using the command :
make -f demo12.mk buildoci CDEMOEXE=custagg.so CDEMOOBJS=custagg.o
I am not getting any error while running this make file.
Can you please tell me whether PLSQL/Oracle is able to locate the file or not. Incase, if it is locating the file but due to some error in the custagg.so it is throwing that error. If this is the case, is there any way that i can debug the C program .....how can i install the debug_extproc package.. I am really new to C & OCI ... if the custagg.so is being located then there might be some problem with the way I am dynamically allocating memory to some variables.
Please kindly reply to this Post/response.
Please let me know if you also want to see my program code.
Thanks & Regards,
-NN