CI: move autogen.sh to specific build scripts.

It seems that autogen.sh is not called in some situations
(merge request updating configure scripts).

Let's move this directly before configure.
Also print disable-<feature> options to CI output.

.gitlab/ci/compilation-clang.gitlab-ci.yml

@@ -3,6 +3,7 @@ test-clang-compilation:
     - .gitlab-shared-clang
   script:
     - export CFLAGS="-Wall -Werror"
+    - ./autogen.sh
     - ./configure
     - make -j
     - make -j check-programs
@@ -13,6 +14,7 @@ test-clang-Wall-script:
   script:
     - export CFLAGS="-g -O0"
     - export CC="$CI_PROJECT_DIR/.gitlab/ci/clang-Wall"
+    - ./autogen.sh
     - ./configure
     - make -j CFLAGS="-g -O0 -Werror"
     - make -j CFLAGS="-g -O0 -Werror" check-programs
@@ -21,6 +23,7 @@ test-scan-build:
   extends:
     - .gitlab-shared-clang
   script:
+    - ./autogen.sh
     - scan-build${COMPILER_VERSION:+-$COMPILER_VERSION} -V ./configure CFLAGS="-g -O0"
     - make clean
     - scan-build${COMPILER_VERSION:+-$COMPILER_VERSION} --status-bugs -maxloop 10 make -j

.gitlab/ci/compilation-gcc.gitlab-ci.yml

@@ -3,6 +3,7 @@ test-gcc-compilation:
     - .gitlab-shared-gcc
   script:
     - export CFLAGS="-Wall -Werror"
+    - ./autogen.sh
     - ./configure
     - make -j
     - make -j check-programs
@@ -13,6 +14,7 @@ test-gcc-Wall-script:
   script:
     - export CFLAGS="-g -O0"
     - export CC="$CI_PROJECT_DIR/.gitlab/ci/gcc-Wall"
+    - ./autogen.sh
     - ./configure
     - make -j CFLAGS="-g -O0 -Werror"
     - make -j CFLAGS="-g -O0 -Werror" check-programs
@@ -22,6 +24,7 @@ test-gcc-fanalyzer:
     - .gitlab-shared-gcc
   script:
     - export CFLAGS="-Wall -Werror -g -O0 -fanalyzer -fdiagnostics-path-format=separate-events"
+    - ./autogen.sh
     - ./configure
     - make -j
     - make -j check-programs

.gitlab/ci/compilation-various-disables.yml

@@ -20,10 +20,13 @@ test-gcc-disable-compiles:
   script:
     - DEBIAN_FRONTEND=noninteractive apt-get -yq install meson ninja-build
     - export CFLAGS="-Wall -Werror"
+    - ./autogen.sh
+    - echo "Configuring with --disable-$DISABLE_FLAGS"
     - ./configure $(for i in $DISABLE_FLAGS; do echo "--disable-$i"; done)
     - make -j
     - make -j check-programs
     - git checkout -f && git clean -xdf
     - meson -v
+    - echo "Configuring with -D$DISABLE_FLAGS=false"
     - meson setup meson_builddir $(for i in $DISABLE_FLAGS; do echo "-D$i=false"; done)
     - ninja -C meson_builddir

.gitlab/ci/gitlab-shared-docker.yml

@@ -12,7 +12,6 @@
     - .gitlab/ci/cibuild-setup-ubuntu.sh
     - export CC="${COMPILER}${COMPILER_VERSION:+-$COMPILER_VERSION}"
     - export CXX="${COMPILER}++${COMPILER_VERSION:+-$COMPILER_VERSION}"
-    - ./autogen.sh
 
 .gitlab-shared-gcc:
   extends: