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[Xen-devel] [PULL v2 13/20] configure: Support pkg-config for zlib



From: Stefan Weil <sw@xxxxxxxxxxx>

This is needed for builds with the mingw64-* packages from Cygwin,
but also works for Linux.

Move the zlib test also more to the end because users should
get information on the really important missing packages
(which also require zlib) first.

Signed-off-by: Stefan Weil <sw@xxxxxxxxxxx>
Reviewed-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
Message-Id: <20180712192603.11599-1-sw@xxxxxxxxxxx>
Signed-off-by: Laurent Vivier <laurent@xxxxxxxxx>
---
 configure | 40 +++++++++++++++++++++++-----------------
 1 file changed, 23 insertions(+), 17 deletions(-)

diff --git a/configure b/configure
index 1ee09bd112..a02df30dde 100755
--- a/configure
+++ b/configure
@@ -2151,23 +2151,6 @@ EOF
   fi
 fi
 
-#########################################
-# zlib check
-
-if test "$zlib" != "no" ; then
-    cat > $TMPC << EOF
-#include <zlib.h>
-int main(void) { zlibVersion(); return 0; }
-EOF
-    if compile_prog "" "-lz" ; then
-        :
-    else
-        error_exit "zlib check failed" \
-            "Make sure to have the zlib libs and headers installed."
-    fi
-fi
-LIBS="$LIBS -lz"
-
 ##########################################
 # lzo check
 
@@ -3479,6 +3462,29 @@ if ! compile_prog "$glib_cflags -Werror" "$glib_libs" ; 
then
     fi
 fi
 
+#########################################
+# zlib check
+
+if test "$zlib" != "no" ; then
+    if $pkg_config --exists zlib; then
+        zlib_cflags=$($pkg_config --cflags zlib)
+        zlib_libs=$($pkg_config --libs zlib)
+        QEMU_CFLAGS="$zlib_cflags $QEMU_CFLAGS"
+        LIBS="$zlib_libs $LIBS"
+    else
+        cat > $TMPC << EOF
+#include <zlib.h>
+int main(void) { zlibVersion(); return 0; }
+EOF
+        if compile_prog "" "-lz" ; then
+            LIBS="$LIBS -lz"
+        else
+            error_exit "zlib check failed" \
+                "Make sure to have the zlib libs and headers installed."
+        fi
+    fi
+fi
+
 ##########################################
 # SHA command probe for modules
 if test "$modules" = yes; then
-- 
2.17.2


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