Various CI build fixes

- do not create symbolic links but rather a real copy for preprocessor/MEX
  files, because gitlab serves a zip (which does not support artifacts)
- fix preprocessor artifact location
- disable MATLAB and Octave when building doc

.gitlab-ci.yml

@@ -6,22 +6,19 @@ build_binaries:
   script:
     - autoreconf -si
     - './configure --with-matlab=$(dirname $(dirname $(readlink -f `which matlab`))) MATLAB_VERSION=$(echo version | matlab -nodesktop -nodisplay -nosplash 2>/dev/null | sed -En "/ans\ =/!d;n;n;s/^[^0-9]*([0-9]+\.[0-9]+).*$/\1/;p")'
-    - make -j $(nproc)
+    - make -j $(nproc) LN_S="cp -p"
   artifacts:
     paths:
-      - preprocessor/src/dynare_m
-      - matlab/preprocessor*/
+      - matlab/preprocessor*/*
       - mex/octave/
-      - mex/build/octave/*/*.mex
       - mex/matlab/
-      - mex/build/matlab/*/*.mex*
       - dynare++/src/dynare++
 
 build_doc:
   stage: build
   script:
     - autoreconf -si
-    - ./configure
+    - ./configure --disable-matlab --disable-octave
     - make -j $(nproc) info pdf html
   artifacts:
     paths: