From 9b840b0c01f49022379a46e29a9a86e9d0f54062 Mon Sep 17 00:00:00 2001
From: Alec Ari <neotheuser@ymail.com>
Date: Sun, 9 Oct 2022 00:14:04 -0500
Subject: BROKEN: Revert "debian/configure: Drop outdated support for rtai and
 xenomai"

BROKEN
This reverts commit 6f285604ac1a1b58b2d65d5904ffec3998a833ef.
BROKEN

Signed-off-by: Alec Ari <neotheuser@ymail.com>
---
 debian/configure                     | 144 +++++++++++++++++++++++----
 debian/linuxcnc-uspace-rtai.files.in |   1 +
 2 files changed, 123 insertions(+), 22 deletions(-)
 create mode 100644 debian/linuxcnc-uspace-rtai.files.in

diff --git a/debian/configure b/debian/configure
index f5a9683549..1973b1cf0e 100755
--- a/debian/configure
+++ b/debian/configure
@@ -18,7 +18,22 @@ usage () {
 $P: Set up debian/ files to build for a particular kernel
 
 Usage:
-  $P [no-docs]
+    $P uspace [noauto | rtai | rtai=packagename] ...
+        Build for a userspace realtime systems or simulator
+
+    $P sim
+        Deprecated synonym for '$P uspace'
+
+    $P [kernel-version]
+        Build for the installed RTAI realtime kernel specified by
+        [kernel-version], for example "3.4.9-rtai-686-pae"
+
+    $P -r
+        Build for the currently running kernel for RTAI realtime only
+
+    $P -a
+        If the currently running kernel has realtime extensions, use it.
+        Otherwise use any available realtime kernel it can find.
 
   Extra options:
     no-docs
@@ -28,15 +43,48 @@ EOF
 
 cd "${0%/*}"
 
-if [ "$1" == "-h" -o "$1" == "-help" -o "$1" == "--help" ]; then
+if [ $# -eq 0 -o "$1" == "-h" -o "$1" == "-help" -o "$1" == "--help" ]; then
     usage
+    if [ $# -ne 1 ]; then
+        exit 1
+    fi
     exit 0
 fi
 
+if [ $1 = "-r" ]; then
+    set -- `uname -r`
+elif [ $1 = "-a" ]; then
+    KERNEL="$(uname -r)"
+    if [ ! -d "/usr/realtime-$KERNEL" ]; then
+        KERNEL=$(ls -1d /usr/realtime-* 2> /dev/null | cut -d - -f 2- | head -1)
+        if [ -z "$KERNEL" ]; then
+            echo "no realtime kernels found!"
+            exit 1
+        fi
+    fi
+    set -- $KERNEL
+fi
+
+TARGET=$1; shift
+
+# for example: "3.16.0-9"
+KERNEL_VERSION_ABI=${TARGET%-rtai-*}
+
+MODULE_PATH=usr/realtime-$TARGET/modules/linuxcnc
+MODULE_EXT=.ko
+KERNEL_DEPENDS="linux-image-$TARGET,rtai-modules-$TARGET|rtai-modules-$KERNEL_VERSION_ABI"
+KERNEL_HEADERS=linux-headers-$TARGET
+EXTRA_FILES=
 EXTRA_BUILD=
+KERNEL_VERSION=$TARGET
+DRIVERS=drivers.files.in
+PYTHON_VERSION=$(python3 -c 'import sys; print (sys.version[:3])')
 PYTHON_VERSION_NEXT=$(python3 -c 'import sys; print (sys.version[:2] + str(1+int(sys.version[2])))')
 LIBREADLINE_DEV="libreadline-gplv2-dev | libreadline-dev"
 
+BUILD_RTAI=false
+BUILD_AUTO=true
+
 ENABLE_BUILD_DOCUMENTATION=--enable-build-documentation=pdf
 
 # Specialize these based on DISTRIB_NAME as needed
@@ -44,11 +92,21 @@ ENABLE_BUILD_DOCUMENTATION=--enable-build-documentation=pdf
 # the whole point is to allow a range of kernels to work, and we don't know
 # of any common thing that all such kernels would provide.
 
+# rtai-modules typically doesn't properly declare the architectures where
+# it works, so hardcode it...
+RTAI_DEV="$(apt-cache search -n rtai-modules | head -1 | awk '{print $1}')"
+RTAI_ARCHITECTURE="i386 amd64"
+if [ ! -z "$RTAI_DEV" ]; then
+    RTAI_DEV="$RTAI_DEV [i386], $RTAI_DEV [amd64]"
+fi
+
 while test $# -ne 0; do
     case "$1" in
-    sim|uspace|noauto) echo "$1 is accepted for compatibility, but ignored";;
+    noauto) BUILD_AUTO=false ;;
+    rtai) BUILD_RTAI=true ;;
+    rtai=*) BUILD_RTAI=true; RTAI_DEV=${1#rtai=} ;;
     no-docs) unset ENABLE_BUILD_DOCUMENTATION ;;
-    *) echo 1>&2 "Unknown option: $1"; exit 99 ;;
+    *) echo 1>&2 "Unknown feature: $1"; exit 99 ;;
     esac
     shift
 done
@@ -104,8 +162,15 @@ case $DISTRIB_NAME in
         DEBHELPER="debhelper-compat (= 13)"
         ;;
     Ubuntu-20.*)
+        DOC_DEPENDS="$DOC_DEPENDS, asciidoc-dblatex"
+        YAPPS_RUNTIME="yapps2"
         ;;
     Debian-10|Debian-10.*|Raspbian-10|Raspbian-10.*)
+        DOC_DEPENDS="$DOC_DEPENDS, asciidoc-dblatex"
+        PYTHON_GST=python-gst-1.0,gstreamer1.0-plugins-base
+        EXTRA_BUILD=python-yapps
+        YAPPS_RUNTIME="python-yapps"
+        STANDARDS_VERSION="3.9.8"
         ;;
     *)
         echo "unknown distribution: $DISTRIB_NAME"
@@ -114,23 +179,45 @@ case $DISTRIB_NAME in
         ;;
 esac
 
-TARGET=uspace
+TARGET_EXTRA=
 MAIN_PACKAGE_NAME=linuxcnc
 OTHER_MAIN_PACKAGE_NAME=linuxcnc-uspace
 EXTRA_RECOMMENDS=hostmot2-firmware-all
-MODULE_PATH=usr/lib/linuxcnc/modules
-MODULE_EXT=.so
-KERNEL_DEPENDS=libudev-dev,iptables
-KERNEL_DEPENDS_BUILD=libudev-dev
-KERNEL_HEADERS=
-KERNEL_VERSION=uspace
-MODUTILS_DEPENDS=
-DISTRIB_NAME=uspace-$DISTRIB_NAME
-MAIN_PACKAGE_NAME=linuxcnc-uspace
-OTHER_MAIN_PACKAGE_NAME=linuxcnc
-
-EXTRA_RECOMMENDS="$EXTRA_RECOMMENDS, linux-image-rt-amd64 [linux-amd64], linux-image-rt-686-pae [linux-i386]"
-CONFIGURE_REALTIME_ARG=--with-realtime=uspace
+case $TARGET in
+    uspace|sim)
+        if $BUILD_AUTO; then
+            if test ! -z "$RTAI_DEV"; then
+                BUILD_RTAI=true
+            fi
+        fi
+
+        if $BUILD_RTAI; then
+            EXTRA_BUILD="$EXTRA_BUILD,$RTAI_DEV"
+            TARGET_EXTRA="$TARGET_EXTRA+rtai"
+        fi
+
+	TARGET=uspace
+        MODULE_PATH=usr/lib/linuxcnc/modules
+	MODULE_EXT=.so
+	KERNEL_DEPENDS=libudev-dev,iptables
+	KERNEL_HEADERS=
+	KERNEL_VERSION=uspace
+        MODUTILS_DEPENDS=
+	DRIVERS=
+        EXTRA_FILES="usr/bin/rtapi_app"
+	DISTRIB_NAME=uspace-$DISTRIB_NAME
+	MAIN_PACKAGE_NAME=linuxcnc-uspace
+        OTHER_MAIN_PACKAGE_NAME=linuxcnc
+
+        EXTRA_RECOMMENDS="$EXTRA_RECOMMENDS, linux-image-rt-amd64 [linux-amd64]"
+        CONFIGURE_REALTIME_ARG=--with-realtime=uspace
+    ;;
+    4.19.*-rtai-*)
+        CONFIGURE_REALTIME_ARG=--with-realtime=/usr/realtime-$KERNEL_VERSION
+    ;;
+    *)
+	echo "your kernel '$TARGET' is not known. There might be needed dependencies which won't get set automatically."
+esac
 
 subst () {
 sed \
@@ -160,7 +247,6 @@ sed \
     -e "s#@TARGET@#$TARGET#g" \
     -e "s#@CONFIGURE_REALTIME_ARG@#$CONFIGURE_REALTIME_ARG#g" \
     -e "s#@TCLTK_VERSION@#$TCLTK_VERSION#g" \
-    -e "s#@XENOMAI_ARCHITECTURE@#$XENOMAI_ARCHITECTURE#g" \
     -e "s|@YAPPS_RUNTIME@|$YAPPS_RUNTIME|g" \
     -e "s#@ENABLE_BUILD_DOCUMENTATION@#$ENABLE_BUILD_DOCUMENTATION#g" \
     -e '/^\s*,\s*$/d' \
@@ -175,11 +261,25 @@ fi
 
 subst control.top.in > control
 
+if [ "$TARGET" == "uspace" ]; then
+    if $BUILD_RTAI; then
+        echo >> control
+        subst control.uspace-rtai.in >> control
+        subst linuxcnc-uspace-rtai.files.in > linuxcnc-uspace-rtai.files
+    fi
+fi
+
 echo >> control
 subst control.main-pkg.in >> control
 
-subst linuxcnc.install.in > ${MAIN_PACKAGE_NAME}.install
-subst linuxcnc.lintian-overrides.in > ${MAIN_PACKAGE_NAME}.lintian-overrides
+if [ "$TARGET" == "uspace" ]; then
+    cp linuxcnc-dev.files.in linuxcnc-uspace-dev.files
+else
+    cp linuxcnc-dev.files.in linuxcnc-dev.files
+    echo "$MODULE_PATH/Module.symvers" >> linuxcnc-dev.files
+fi
+
+subst rules.in > rules; chmod +x rules
 
 subst rules.in > rules
 chmod +x rules
@@ -190,4 +290,4 @@ fi
 
 
 rm -f ../build-stamp
-echo "successfully configured for '$DISTRIB_NAME'.."
+echo "successfully configured for '$DISTRIB_NAME'-'$TARGET$TARGET_EXTRA'.."
diff --git a/debian/linuxcnc-uspace-rtai.files.in b/debian/linuxcnc-uspace-rtai.files.in
new file mode 100644
index 0000000000..0b05b4f794
--- /dev/null
+++ b/debian/linuxcnc-uspace-rtai.files.in
@@ -0,0 +1 @@
+/usr/lib/libuspace-rtai.so.0
-- 
2.30.2