Re: conditionally linking to mingw32 library

[Alexandre Duret-Lutz]

>>> "Mark" == Mark Brand <address@hidden> writes:

[...]

 Mark> <configure.ac>
 Mark> if test x$target_os == xmingw32; then
 Mark> WINSOCK=-lws2_32
 Mark> fi
 Mark> AC_SUBST(WINSOCK)
 Mark> </configure.ac>

Eww.  That would be $host, not $target, and anyway testing the
host type should always be your last resort.  Why not test for
the presence of the ws2_32 library and use it if it's there ?

Here is a possible check assuming adding -lws2_32 to LIBS is OK
(but it's easy to define WINSOCK as above if you prefer).


AC_SEARCH_LIBS([gethostbyname], [nsl socket], [], [
dnl Can't search ws2_32 for gethostbyname using AC_SEARCH_LIBS, because
dnl it requires #include <winsocks2.h> to work.
my_old_LIBS=$LIBS
LIBS="-lws2_32 $LIBS"
ws2_res=yes
AC_MSG_CHECKING([for gethostbyname in ws2_32])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <winsock2.h>]],
                                [[gethostbyname ("");]])],
               [], [LIBS=$my_ac_save_LIBS ws2_res=no])
AC_MSG_RESULT([$ws2_res])
])
-- 
Alexandre Duret-Lutz