Import LinuxCNC source tree

tests/interp/nested-sub-in-file-error/expected

@@ -0,0 +1,9 @@
+    1 N..... USE_LENGTH_UNITS(CANON_UNITS_MM)
+    2 N..... SET_G5X_OFFSET(1, 0.0000, 0.0000, 0.0000, 0.0000, 0.0000, 0.0000)
+    3 N..... SET_G92_OFFSET(0.0000, 0.0000, 0.0000, 0.0000, 0.0000, 0.0000)
+    4 N..... SET_XY_ROTATION(0.0000)
+    5 N..... SET_FEED_REFERENCE(CANON_XYZ)
+    6 N..... ON_RESET()
+    7 N..... COMMENT("Test: numbered sub after named endsub in same file should error")
+    8 N..... MESSAGE(" sequential main: 7.000000 8.000000 9.000000")
+    9 N..... ON_RESET()

tests/interp/nested-sub-in-file-error/subs/sequential.ngc

@@ -0,0 +1,9 @@
+o<sequential> sub
+(DEBUG, sequential main: #1 #2 #3)
+o200 call [4] [5] [6]
+o<sequential> endsub
+
+o200 sub
+(DEBUG, o200 helper: #1 #2 #3)
+o200 endsub
+M2

tests/interp/nested-sub-in-file-error/test.ini

@@ -0,0 +1,2 @@
+[RS274NGC]
+SUBROUTINE_PATH=subs

tests/interp/nested-sub-in-file-error/test.ngc

@@ -0,0 +1,3 @@
+(Test: numbered sub after named endsub in same file should error)
+o<sequential> call [7] [8] [9]
+M2

tests/interp/nested-sub-in-file-error/test.sh

@@ -0,0 +1,5 @@
+#!/bin/bash -e
+# Numbered sub called from within a named sub file, where no matching
+# file exists, must produce an error (forward-seek blocked).
+# Regression test for LinuxCNC/linuxcnc#3880.
+! rs274 -g -i test.ini test.ngc