Can't compile against OCILIB

I'm having trouble compiling some code against ocilib (libocilib.a) on version 3.9.0:

$ ls

libocilib.a ocilib.h test.c

$ gcc -o test -L. -locilib test.c

/tmp/cc4071VP.o: In function `main':

test.c:(.text+0x27): undefined reference to OCI_Initialize

test.c:(.text+0x64): undefined reference to OCI_ConnectionCreate

test.c:(.text+0x9d): undefined reference to OCI_StatementCreate

test.c:(.text+0xaf): undefined reference to OCI_ExecuteStmt

test.c:(.text+0xb8): undefined reference to OCI_GetResultset

test.c:(.text+0xcc): undefined reference to OCI_GetString

test.c:(.text+0xdd): undefined reference to OCI_FetchNext

test.c:(.text+0xe6): undefined reference to OCI_Cleanup

collect2: ld returned 1 exit status

Ok. In that case:

$ strings libocilib.a | grep OCI_Initialize

OCI_Initialize

OCI_Initialize

OCI_Initialize

OCI_Initialize

There was a solution to this problem answered by the man (vince) himself on another page, but it isn't working for me.

What DOES work is when I try to compile against an .so:

$ ls

libocilib.so* libocilib.so.3* libocilib.so.3.9.0* ocilib.h test.c

$ gcc -o test -L. -locilib test.c

$

The program runs as expected as well (after modifying LD_LIBRARY_PATH, of course!).

The solution mentioned earlier includes some defines -DOCI_IMPORT_LINKAGE and -DOCI_CHARSET_ANSI I've tried with both of these (even though the online docs say that DOCI_IMPORT_LINKAGE is only used while compiling the library itself. I had assumed that pertains more to the linki开发者_运维技巧ng of the actual oracle libs than it does ocilib. It was tried, none the less.

Speaking of which, if it helps to answer the question, I compiled the library to have runtime linking, having passed the --with-oracle-import=runtime flag into ./configure.

One more side note, something similar happens on Windows 32-bit. No problems with Windows 64. I can link and run a program against my own compiled libocilib.lib just fine.

Hopefully I've provided enough clues... anyone know what I'm doing wrong?

Thanks in advance help.

---

Have you tried linking it like this?

gcc -o test test.c -L. -locilib

At least in the past (I haven't done much C/C++ in a long time) the order of linking mattered. test.o would have references to OCI_Initialize and with libocilib.a after test.o, those would be satisfied. But if you linked the other way around those references would not be satisfied because the linker saw the OCI_Initialize symbol before it looked at test.o and so never realized it needed to keep a "pointer" to the symbol around when looking at test.o.