Re: [Mingw-users] undefined reference to `lt_dlopenext'

[JonY <jo...@us...>]

On 1/10/2010 00:48, LRN wrote:
> $ nm -A --defined-only /mingw/lib/*.a | grep lt_dlopenext
> %DISK_WITH_MINGW%/mingw/lib/libltdl.a:libltdl_libltdl_la-ltdl.o:00003130
> T _lt_dlopenext
> %DISK_WITH_MINGW%/mingw/lib/libltdl.dll.a:d000063.o:00000000 I
> __imp__lt_dlopenext
> %DISK_WITH_MINGW%/mingw/lib/libltdl.dll.a:d000063.o:00000000 T _lt_dlopenext
>
> $ gcc -o conftest.exe -g -O2 -lltdl conftest.c
> %TEMP%\ccwyr3xI.o: In function `main':
> %CURRENT_DIRECTORY%/conftest.c:33: undefined reference to `lt_dlopenext'
> collect2: ld returned 1 exit status
>
> $ cat conftest.c
>   /* confdefs.h */
>   #define PACKAGE_NAME "GNUnet"
>   #define PACKAGE_TARNAME "gnunet"
>   #define PACKAGE_VERSION "0.8.1"
>   #define PACKAGE_STRING "GNUnet 0.8.1"
>   #define PACKAGE_BUGREPORT "bug...@gn..."
>   #define PACKAGE_URL ""
>   #define PACKAGE "GNUnet"
>   #define VERSION "0.8.1"
>   #define STDC_HEADERS 1
>   #define HAVE_SYS_TYPES_H 1
>   #define HAVE_SYS_STAT_H 1
>   #define HAVE_STDLIB_H 1
>   #define HAVE_STRING_H 1
>   #define HAVE_MEMORY_H 1
>   #define HAVE_STRINGS_H 1
>   #define HAVE_INTTYPES_H 1
>   #define HAVE_STDINT_H 1
>   #define HAVE_UNISTD_H 1
>   #define LT_OBJDIR ".libs/"
>   /* end confdefs.h.  */
>
>   /* Override any GCC internal prototype to avoid an error.
>      Use char because int might match the return type of a GCC
>      builtin and then its argument prototype would still apply.  */
>   #ifdef __cplusplus
>   extern "C"
>   #endif
>   char lt_dlopenext ();
>   int
>   main ()
>   {
>   return lt_dlopenext ();
>     ;
>     return 0;
>   }
>
> What's wrong with it?
>

Hi,

Its failing because of the wrong link order. Libraries are always
specified after the objects.

Wrong:   gcc -o conftest.exe -g -O2 -lltdl conftest.c
Correct: gcc -o conftest.exe -g -O2 conftest.c -lltdl