[Fwd: problem compiling gethostbyname_r with g++]

[Kevin Su <ksu at kinaare dot net>]

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• To: help-gcc-request at gnu dot org
• Subject: problem compiling gethostbyname_r with g++
• From: Kevin Su <ksu at kinaare dot net>
• Date: Mon, 18 Dec 2000 13:41:54 -0500

Hi,

When I compile the re-entrant version of gethostbyname,
gethostbyname_r(),
 with gcc, it is successfully compiled and linked.
 But if I used g++ to compile it, I got errors from undefined symbol
 __h_errno_location().

 The simple test program test.c and the compilation output is shown
bleow.

 Anybody know what might be the problem here?

         Any help or hint is greatly appreciated.

                                               Kevin

 test.c
 ========================================

 #include <stdio.h>
#include <netdb.h>

 int main(int argc, char** argv)
 {
     int h_errno;
     struct hostent *result, result_buf;
     char buf[1024];

     if(gethostbyname_r(argv[1], &result_buf, buf, 1024, &result,
&h_errno) <
 0){
            return -1;
     }

 }

 ======================================

 $ gcc test.c
 $ g++ test.c
 /tmp/ccBqm5JX.o: In function `main':
 /tmp/ccBqm5JX.o(.text+0xa): undefined reference to
`__h_errno_location(void)'
 collect2: ld returned 1 exit status


The platform on which the problem happened:

Linux on Intel

gcc version (gcc -v):
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/egcs-2.91.66/specs

gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)

                                                  Kevin

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