Link with win32 API library on windows

ChangeLog:

	* configure: Regenerate.
	* configure.ac: Link with kernel32 on windows

Signed-off-by: Pierre-Emmanuel Patry <[email protected]>

configure

@@ -8833,9 +8833,14 @@ fi
 # build of the Rust frontend in case a dep is missing.
 missing_rust_dynlibs=none
 
-save_LIBS="$LIBS"
-LIBS=
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
+case "${target}" in
+  *-*-mingw*)
+      CRAB1_LIBS="-lkernel32"
+	;;
+  *)
+    save_LIBS="$LIBS"
+    LIBS=
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
 $as_echo_n "checking for library containing dlopen... " >&6; }
 if ${ac_cv_search_dlopen+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -8891,7 +8896,7 @@ if test "$ac_res" != no; then :
 
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing pthread_create" >&5
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing pthread_create" >&5
 $as_echo_n "checking for library containing pthread_create... " >&6; }
 if ${ac_cv_search_pthread_create+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -8947,8 +8952,10 @@ if test "$ac_res" != no; then :
 
 fi
 
-CRAB1_LIBS="$LIBS"
-LIBS="$save_LIBS"
+    CRAB1_LIBS="$LIBS"
+    LIBS="$save_LIBS"
+  ;;
+esac
 
 if test "$ac_cv_search_dlopen" = no; then
     missing_rust_dynlibs="libdl"

configure.ac

@@ -2042,12 +2042,19 @@ AC_SUBST(PICFLAG)
 # build of the Rust frontend in case a dep is missing.
 missing_rust_dynlibs=none
 
-save_LIBS="$LIBS"
-LIBS=
-AC_SEARCH_LIBS([dlopen], [dl])
-AC_SEARCH_LIBS([pthread_create], [pthread])
-CRAB1_LIBS="$LIBS"
-LIBS="$save_LIBS"
+case "${target}" in
+  *-*-mingw*)
+      CRAB1_LIBS="-lkernel32"
+	;;
+  *)
+    save_LIBS="$LIBS"
+    LIBS=
+    AC_SEARCH_LIBS([dlopen], [dl])
+    AC_SEARCH_LIBS([pthread_create], [pthread])
+    CRAB1_LIBS="$LIBS"
+    LIBS="$save_LIBS"
+  ;;
+esac
 
 if test "$ac_cv_search_dlopen" = no; then
     missing_rust_dynlibs="libdl"