[PATCH] JD_CHECK_FOR_LIBRARY: Improve splitting of include_and_lib

The shell pattern is the easiest form to split the variable
include_and_lib in before‐comma and behind‐comma.

diff --git a/autoconf/aclocal.m4 b/autoconf/aclocal.m4
index 8628a3b..f2aebfc 100644
--- a/autoconf/aclocal.m4
+++ b/autoconf/aclocal.m4
@@ -895,8 +895,8 @@ AC_DEFUN(JD_CHECK_FOR_LIBRARY, dnl#{{{
       for include_and_lib in $inc_and_lib_dirs
       do
         # Yuk.  Is there a better way to set these variables??
-        xincdir=`echo $include_and_lib | tr ',' ' ' | awk '{print [$]1}'`
-       xlibdir=`echo $include_and_lib | tr ',' ' ' | awk '{print [$]2}'`
+        xincdir=${include_and_lib%%,*}
+       xlibdir=${include_and_lib##*,}
        found=0
        if test -r $xincdir/$xincfile
        then 
-- 
Macht besitzen und nicht ausüben ist wahre Größe.
                                                   (Friedl Beutelrock)

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