__errno() synbol referencing error

Question

Hello,
I got this problem at the linker and did not know which -l... to link to. Does any body know that library? OS is 8 and Studio 8. Thank you for your time.
Son Tran

Answer 1

My compiler is
Using CC -verbose=version
CC: Sun Workshop 6 update 1 C++ 5.2 2000/09/11
I took out the following code from my source code and developed it separately
See the sourcecode for the files below.
Below is a file which has a small function which checks if a file exists or not. It includes "errno.h"
File name is xieutFile.C
============================
// xieutFile.C
#include "xieutFile.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
* Following function checks if the file fileName exists. fileName should *
* specify the full path to the file. Function returns 0 on success - file *
* exists. Returns -2 if file does not exist, -3 if search permission is *
* denied for a component of the path, and -1 for any other failure. *
* See man pages for stat(2V) for more info on stat system call. *
int xieutFileExists (const char* fileName)
extern int     errno;
struct stat stbuf;
int          return_val;
if ( return_val = stat(fileName, &stbuf) < STAT_SUCCESS )
if (errno == ENOENT) // File does not exist
          return_val = FILE_DOES_NOT_EXIST;
else
if (errno == EACCES)
               return_val = SEARCH_PERMISSION_DENIED;
else
               return_val = STAT_FAILURE;
errno = 0; // Reset for next time
return return_val;
===========================================
Now I wrote another main program which calls the function implemented as above
Below is the source code. The file is called checkFile.C
=====================================================
// checkFile.C
#include <iostream.h>
extern int xieutFileExists(const char*);
int main(int argc, const char* argv)
if( xieutFileExists("/apps/ies/6.1/dev/src/ut/xieutFile.C") )
cout << "File exists" << endl;
else
cout << "File does not exist" << endl;
=====================================
I compiled the xieutFile.C usng the below command.
CC -c -mt -xarch=v9 -DTHREAD -DSOLARIS -DSOLARIS2_7 -DBITS64 -g xieutFile.C
then I created the shared library as below.
CC -G -xarch=v9 -o libxieut.so xieutFile.o
then I compiled the main program checkFile.C as below.
CC -c -mt -xarch=v9 -DTHREAD -DSOLARIS -DSOLARIS2_7 -DBITS64 -g checkFile.C
Then I tried to make the executable checkFile using the below command .
CC -o checkFile checkFile.o -mt -xarch=v9 -g -L. -lxieut
I get the error message
ild: (undefined symbol) int*___errno() -- referenced in ./libxieut2.so
If I replaced #include <errno.h> with #include <sys/errno.h> then it compiles and links fine.
The source code of my project links with lot of libraries. like libc.so, libaio.so, libintl.so, libnsl.so, libsocket.so, libdl.so, libm.so, libiostream.so under /usr/lib/sparcv9 directory of solaris 8.
Please let me know if I am missing anything or is there any other way.
Thanks,
zaki