autogen: Report missing requirements (#1394)

* autogen: Report missing autoconf-archive

autoconf-archive is required, but users often missed that requirement.

The script now detects and reports missing autoconf-archive and removes
the incomplete generated configure script.

Signed-off-by: Stefan Weil <sw@weilnetz.de>

* autogen: Report missing pkg-config

pkg-config is required.

The script now detects and reports missing pkg-config and removes
the incomplete generated configure script.

Signed-off-by: Stefan Weil <sw@weilnetz.de>

autogen.sh

@@ -113,6 +113,20 @@ automake --add-missing --copy --warnings=all || bail_out
 echo "Running autoconf"
 autoconf || bail_out
 
+if grep -q AX_CHECK_COMPILE_FLAG configure; then
+  # The generated configure is invalid because autoconf-archive is unavailable.
+  rm configure
+  echo "Missing autoconf-archive. Check the build requirements."
+  bail_out
+fi
+
+if grep -q PKG_CHECK_MODULES configure; then
+  # The generated configure is invalid because pkg-confg is unavailable.
+  rm configure
+  echo "Missing pkg-config. Check the build requirements."
+  bail_out
+fi
+
 echo ""
 echo "All done."
 echo "To build the software now, do something like:"