2 files changed, 22 insertions, 1 deletions
diff --git a/audio/jack-keyboard/README b/audio/jack-keyboard/README
index e5599e8e05..66b560f1d0 100644
--- a/audio/jack-keyboard/README
+++ b/audio/jack-keyboard/README
@@ -7,6 +7,9 @@ default keyboard mapping is much better - it uses the same layout as
 trackers (like Impulse Tracker) did, so you have two and half octaves
 under your fingers.
 
+Optional dependency: lash. By default, this is autodetected. If you want
+to disable building with lash, set LASH=no in the script's environment.
+
 This package uses POSIX filesystem capabilities to execute with
 elevated privileges (required for realtime audio processing). This
 may be considered a security/stability risk. Please read
diff --git a/audio/jack-keyboard/jack-keyboard.SlackBuild b/audio/jack-keyboard/jack-keyboard.SlackBuild
index 7116c80107..356c69176c 100644
--- a/audio/jack-keyboard/jack-keyboard.SlackBuild
+++ b/audio/jack-keyboard/jack-keyboard.SlackBuild
@@ -6,6 +6,9 @@
 
 # Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.
 
+# 20170218 bkw:
+# - Make lash optional.
+
 # 20170216 bkw:
 # - Updated for v2.7.1. Apparently, upstream released 2.7.1 in 2012, but
 #   never got around to updating their web page, which still says that
@@ -62,6 +65,20 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;
 
+case "${LASH:-auto}" in
+  auto)
+    if pkg-config --exists lash-1.0; then
+      LASHOPT="ON"
+    else
+      LASHOPT="OFF"
+    fi ;;
+  y*|Y*|t*|T*|on|ON|1)
+      LASHOPT="ON" ;;
+  *) LASHOPT="OFF" ;;
+esac
+
+echo "LASHOPT=\"$LASHOPT\""
+
 mkdir -p build
 cd build
   cmake \
@@ -70,7 +87,8 @@ cd build
     -DCMAKE_INSTALL_PREFIX=/usr \
     -DLIB_SUFFIX=${LIBDIRSUFFIX} \
     -DMAN_INSTALL_DIR=/usr/man \
-    -DCMAKE_BUILD_TYPE=Release ..
+    -DCMAKE_BUILD_TYPE=Release .. \
+    -DLashEnable=$LASHOPT
   make
   make install DESTDIR=$PKG
 cd ..