Enable the maintainer mode by default

.gitlab-ci.yml

@@ -134,9 +134,16 @@ include:
         }
       fi
   script:
-    - test -f ./configure || ./autogen.sh
+    - >
+      test -f ./configure &&
+      enable_maintainer_mode='no' ||
+      { ./autogen.sh && enable_maintainer_mode='yes'; }
     - mkdir build && cd build
-    - ../configure --with-check-root="${LIBCHEK_ROOT}" ${CONFIG_EXTRA_ARGS}
+    - >
+      ../configure
+      --with-check-root="${LIBCHEK_ROOT}"
+      --enable-maintainer-mode="${enable_maintainer_mode}"
+      ${CONFIG_EXTRA_ARGS}
     - make --output-sync=target check AM_COLOR_TESTS=no TESTS= 2> >(tee ${WARNINGS_FILE})
     - make --silent --keep-going check
     - awk "${WARNINGS_AWK_SCRIPT}" ${WARNINGS_FILE} > awk.out

configure.ac

@@ -12,7 +12,7 @@ AC_CONFIG_SRCDIR([include/mtime_calendar.h])
 AC_CONFIG_HEADERS([config/config.h])
 
 AM_INIT_AUTOMAKE([1.16.1 foreign])
-AM_MAINTAINER_MODE([disable])
+AM_MAINTAINER_MODE([enable])
 AM_EXTRA_RECURSIVE_TARGETS([doc install-doc man install-man])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])