Linking error

[PG]

I am trying to compile a simple ODBC and C example on Windows XP SP2.
I have Cygwin_NT 5.1.

This is the code (obtained from
http://www.easysoft.com/developer/la...dm_fns_drivers)
i am attempting to compile.

ODBCTest.c

>>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>

#include <stdio.h>
#include <windows.h>
#include <sql.h>
#include <sqlext.h>

main() {
SQLHENV env;
char dsn[256];
char desc[256];
SQLSMALLINT dsn_ret;
SQLSMALLINT desc_ret;
SQLUSMALLINT direction;
SQLRETURN ret;

SQLAllocHandle( SQL_HANDLE_ENV, SQL_NULL_HANDLE , &env);
SQLSetEnvAttr(e nv, SQL_ATTR_ODBC_V ERSION, (void *) SQL_OV_ODBC3, 0);

direction = SQL_FETCH_FIRST ;
while(SQL_SUCCE EDED(ret = SQLDataSources( env, direction,
dsn, sizeof(dsn), &dsn_ret,
desc, sizeof(desc), &desc_ret))) {
direction = SQL_FETCH_NEXT;
printf("%s - %s\n", dsn, desc);
if (ret == SQL_SUCCESS_WIT H_INFO) printf("\tdata truncation\n");
}
}

>>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>

Makefile

>>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>

CC=gcc
INCPATH=-I/usr/include -Iinclude
LIBS=-L. -lodbc32
LD=ld
all: clean ODBCTest.exe

ODBCTest.o : ODBCTest.c
$(CC) $(INCPATH) $(CFLAGS) -o ODBCTest.o -c ODBCTest.c
ODBCTest.exe : ODBCTest.o
$(CC) $(LIBS) $(CFLAGS) -o ODBCTest.exe ODBCTest.o
clean:
-rm *.o
-rm *.exe

>>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>

Make output and Errors:

>>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>

$ make
rm *.o
rm *.exe
rm: cannot remove `*.exe': No such file or directory
make: [clean] Error 1 (ignored)
gcc -I/usr/include -Iinclude -o ODBCTest.o -c ODBCTest.c
gcc -L. -lodbc32 -o ODBCTest.exe ODBCTest.o
ODBCTest.o:ODBC Test.c:(.text+0 x4a): undefined reference to
`_SQLAllocHandl e@12'
ODBCTest.o:ODBC Test.c:(.text+0 x70): undefined reference to
`_SQLSetEnvAttr @16'
ODBCTest.o:ODBC Test.c:(.text+0 xca): undefined reference to
`_SQLDataSource s@32'
collect2: ld returned 1 exit status
make: *** [ODBCTest.exe] Error 1

>>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>

Things i have checked:
libodbc32.a exists in c:\cygwin\lib\w 32api.
If i remove the above lib, i get a "lib not found" kind of error when
i run make, meaning this is the lib make is using and there is no path
issue.
if i edit libodbc32.a in a binary editor, i can see the all the three
functions mentioned in the error (_SQLAllocHandl e@12,
_SQLSetEnvAttr@ 16 and _SQLDataSources @32) exist.

How can i fix these linking errors?

Thanks

PG

[Jerry Stuckle]

Re: Linking error

PG wrote:

I am trying to compile a simple ODBC and C example on Windows XP SP2.
I have Cygwin_NT 5.1.
>
This is the code (obtained from
http://www.easysoft.com/developer/la...dm_fns_drivers)
i am attempting to compile.
>

<snip>

Things i have checked:
libodbc32.a exists in c:\cygwin\lib\w 32api.
If i remove the above lib, i get a "lib not found" kind of error when
i run make, meaning this is the lib make is using and there is no path
issue.
if i edit libodbc32.a in a binary editor, i can see the all the three
functions mentioned in the error (_SQLAllocHandl e@12,
_SQLSetEnvAttr@ 16 and _SQLDataSources @32) exist.
>
How can i fix these linking errors?
>
Thanks
>
PG
>

1. Get rid of the funny graphics in your messages.
2. Try an ODBC newsgroup. libodbc32 is not a MySQL library
3. Don't even think of crossposting to every SQL-related newsgroup you
can find. Such will get you no help at all.

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attgl obal.net
=============== ===

[PG]

Re: Linking error

I did not know if this was a problem with makefile, cygwin, or the
specific odbc library, hence i submitted this question to multiple
groups.

Anyway, after some more work, found out that the makefile is resulting
in this command
gcc -L/lib/w32api -lodbc32 -o ODBCTest.exe ODBCTest.o <-- Fails with
link errors.

When i change the command to
gcc -o ODBCTest.exe ODBCTest.o /lib/w32api/libodbc32.a <-- Succeeds.

Not sure of the diff between the two but it will do for now.

On Mar 4, 7:24 pm, Jerry Stuckle <jstuck...@attg lobal.netwrote:

PG wrote:

I am trying to compile a simple ODBC and C example on Windows XP SP2.
I have Cygwin_NT 5.1.

>

This is the code (obtained from
http://www.easysoft.com/developer/la...rial.html#dm_f...)
i am attempting to compile.

>
<snip>

Things i have checked:
libodbc32.a exists in c:\cygwin\lib\w 32api.
If i remove the above lib, i get a "lib not found" kind of error when
i run make, meaning this is the lib make is using and there is no path
issue.
if i edit libodbc32.a in a binary editor, i can see the all the three
functions mentioned in the error (_SQLAllocHandl e@12,
_SQLSetEnvAttr@ 16 and _SQLDataSources @32) exist.

>

How can i fix these linking errors?

>

Thanks

>

PG

>
1. Get rid of the funny graphics in your messages.
2. Try an ODBC newsgroup. libodbc32 is not a MySQL library
3. Don't even think of crossposting to every SQL-related newsgroup you
can find. Such will get you no help at all.
>
--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstuck...@attgl obal.net
=============== ===

[Huber Hans]

Re: Linking error

PG schrieb:

I did not know if this was a problem with makefile, cygwin, or the
specific odbc library, hence i submitted this question to multiple
groups.
>
Anyway, after some more work, found out that the makefile is resulting
in this command
gcc -L/lib/w32api -lodbc32 -o ODBCTest.exe ODBCTest.o <-- Fails with
link errors.

But that is not what you posted earlier on, see your previously posted
error output:

rm: cannot remove `*.exe': No such file or directory
make: [clean] Error 1 (ignored)
gcc -I/usr/include -Iinclude -o ODBCTest.o -c ODBCTest.c
gcc -L. -lodbc32 -o ODBCTest.exe ODBCTest.o
ODBCTest.o:ODBC Test.c:(.text+0 x4a): undefined reference to
`_SQLAllocHandl e@12'


no -L/lib/w32api :-)



And hey, this is has nothing to do with databases, this is a simple
gcc,make problem!

Cheers Hans