[libxslt] configure.ac: Invoke PKG_CHECK_MODULES for building shared libraries

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 20cadc71bda05542bb21cb0aded54dd27d369826
Author: Hugh McMaster <hugh mcmaster outlook com>
Date:   Thu Aug 1 21:35:47 2019 +1000

    configure.ac: Invoke PKG_CHECK_MODULES for building shared libraries

 configure.ac | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index b55ccb49..63915d4e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -530,11 +530,15 @@ dnl
 dnl Try pkg-config first if nothing is set
 dnl
 
-if test "x$LIBXML_CONFIG_PREFIX" = "x" -a "x$LIBXML_LIBS" = "x"
-then
-       PKG_CHECK_MODULES([LIBXML], [libxml-2.0 >= $LIBXML_REQUIRED_VERSION], [
-               WITH_MODULES="`$PKG_CONFIG --variable=modules libxml-2.0`"
-       ], [ ])
+if test "x$LIBXML_CONFIG_PREFIX" = "x" -a "x$LIBXML_LIBS" = "x"; then
+    if test "$build_static_libs" = "no"; then
+        PKG_CHECK_MODULES([LIBXML], [libxml-2.0 >= $LIBXML_REQUIRED_VERSION], [
+            WITH_MODULES="`$PKG_CONFIG --variable=modules libxml-2.0`"
+        ], [ ])
+    else
+        PKG_CHECK_MODULES_STATIC([LIBXML], [libxml-2.0 >= $LIBXML_REQUIRED_VERSION],
+        [ ], [ ])
+    fi
 fi
 
 dnl