Add job to test against old MATLAB (R2009b)

.gitlab-ci.yml

@@ -10,6 +10,14 @@ testsuite_matlab:
   script:
     - make check-matlab
 
+testsuite_old_matlab:
+  stage: test
+  variables:
+    MATLAB: /usr/local/MATLAB/R2009b/bin/matlab
+  script:
+    - make check-matlab
+  allow_failure: true
+
 testsuite_octave:
   stage: test
   variables:

Makefile

-OCTAVE=octave-cli
-MATLAB=`which matlab`
+OCTAVE ?= octave-cli
+MATLAB ?= $(shell which matlab)
 
 all: check-octave check-matlab