[PATCH] build-sys: do not include Windows SLIRP dependencies in $LIBS

[Paolo Bonzini <pbonzini@redhat.com>]

When including the internal SLIRP library, we should add all the libraries that
it needs for the build.  Right now they are all included by QEMU, but -liphlpapi
is not needed without slirp.  Move it from LIBS to slirp_libs.

Based on a patch by Marc-André Lureau.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 configure | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 6099be1..d16dad2 100755
--- a/configure
+++ b/configure
@@ -926,7 +926,7 @@ if test "$mingw32" = "yes" ; then
   DSOSUF=".dll"
   # MinGW needs -mthreads for TLS and macro _MT.
   QEMU_CFLAGS="-mthreads $QEMU_CFLAGS"
-  LIBS="-lwinmm -lws2_32 -liphlpapi $LIBS"
+  LIBS="-lwinmm -lws2_32 $LIBS"
   write_c_skeleton;
   if compile_prog "" "-liberty" ; then
     LIBS="-liberty $LIBS"
@@ -6069,6 +6069,9 @@ case "$slirp" in
     mkdir -p slirp
     slirp_cflags="-I\$(SRC_PATH)/slirp/src -I\$(BUILD_DIR)/slirp/src"
     slirp_libs="-L\$(BUILD_DIR)/slirp -lslirp"
+    if test "$mingw32" = "yes" ; then
+      slirp_libs="$slirp_libs -lws2_32 -liphlpapi"
+    fi
     ;;
 
   system)
-- 
1.8.3.1