segmentation fault pro*c code for database connection - unix

Question

I wrote simple pro*c program to check database connectivity. The code is :
int main()
{
char *conn_string = "IDA/IDA#DBISPSS";
int x = 10;
printf("value of x is before db connection %d\n",x);
printf(" conn_string %s \n",conn_string);
EXEC SQL CONNECT :conn_string;
EXEC SQL SELECT 1 INTO :x FROM DUAL;
printf("value of x is %d\n",x);
return 0;
}
Following commands I executed to create exectuable (test_connection) of pro*c code
proc test_connection.pc
cc -I${ORACLE_HOME}/precomp/public -c test_connection.c
cc test_connection.o -o test_connection -L$ORACLE_HOME/lib -lclntsh
and when I executed test_connection exe,the output is
value of x is before db connection 10
conn_string IDA/IDA#DBISPSS
Segmentation fault
But the same code workes well in another linux machine and solaris machine.
Why segmentation fault is thrown?

Answer 1

I tested in HPUX 11.11/Oracle 11 and work ok. I don't see any problem, but try some changes:
Declare 'x' into a DECLARE SECTION:
EXEC SQL BEGIN DECLARE SECTION;
int x = 0;
EXEC SQL END DECLARE SECTION;
Try this connection command:
EXEC SQL BEGIN DECLARE SECTION;
char *user = "abc", *password = "123", *database="base";
EXEC SQL END DECLARE SECTION;
EXEC SQL DECLARE BASE_HANDLE DATABASE;
...
EXEC SQL CONNECT :user IDENTIFIED BY :password AT BASE_HANDLE USING :database;
...
EXEC SQL AT BASE_HANDLE SELECT 1...
Insert a printf("here 1"); between EXEC SQL CONNECT... and EXEC SQL SELECT ... to see where SEGFAULT is thrown.

Answer 2

I had that problem and no amount of fiddling with my source made any difference. What finally worked was when I reinitialized all (ALL) my libraries to make sure that Oracle only had access to the 32 bit versions of the library. It seems Oracle was somehow getting connected to a 64 bit library. Only by removing all references to any libraries or executables except the 32 bit versions worked. This included running a 32 bit version of Pro*C.