oracle database connection

This is a discussion on oracle database connection within the C Programming forums, part of the General Programming Boards category; Hi, I have been doing some investigation to connecting an Oracle 8.1 database with a C application. I've installed cygwin ...

  1. #1
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    Question oracle database connection

    Hi, I have been doing some investigation to connecting an Oracle 8.1 database with a C application. I've installed cygwin with gcc3.3.1 and want to use OCI to connect to my local Oracle database on a Windows 2000 machine.

    Unfortunately, I'm having some trouble compiling the sample programs that come with oracle installation:

    gcc oci02.c -I c:/oracle/ora81/oci/include -o oci02

    The errors are:
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x26f):oci02.c: undefined reference to `_oopen'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x2b8):oci02.c: undefined reference to `_oparse'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x328):oci02.c: undefined reference to `_obndrn'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x3a8):oci02.c: undefined reference to `_odefin'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x428):oci02.c: undefined reference to `_odefin'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x4a8):oci02.c: undefined reference to `_odefin'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x51d):oci02.c: undefined reference to `_oexec'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x559):oci02.c: undefined reference to `_ofetch'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x6ed):oci02.c: undefined reference to `_oerhms'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x890):oci02.c: undefined reference to `_olog'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x8fb):oci02.c: undefined reference to `_oclose'
    /cygdrive/c/DOCUME~1/ADMIN/LOCALS~1/Temp/ccDmHAES.o(.text+0x92f):oci02.c: undefined reference to `_ologof'
    collect2: ld returned 1 exit status

    I'm not sure if I'm going down the correct path to connect C with Oracle. I want to ask anyone with experience for some advice on Oracle database connection in C.

    Thanks.

  2. #2
    and the hat of wrongness Salem's Avatar
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    It looks like it can't find the library

    There are two command line options

    -L/path/to/library       & nbsp;   - this tells the linker where to look
    -lfoo       &nbs p;                &nbsp ;- this tells the linker to look for libfoo.a

    The full pathname for the above library would be
    /path/to/library/libfoo.a
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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