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-rw-r--r--configure.ac7
1 files changed, 7 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index be5e901dc..ce348262b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1191,6 +1191,13 @@ AC_CHECK_PROG(RSVG, rsvg, rsvg, no)
AM_CONDITIONAL([HAVE_RSVG], [test "$RSVG" != "no"])
dnl ---------------------------------------------
+dnl ... and for PNG optimisation tool
+dnl ---------------------------------------------
+
+AC_CHECK_PROG(OPTIPNG, optipng, optipng, no)
+AM_CONDITIONAL([HAVE_OPTIPNG], [test "$OPTIPNG" != "no"])
+
+dnl ---------------------------------------------
dnl Output configuration files
dnl ---------------------------------------------