+case "$(uname)" in
+ Darwin)
+ LIBTOOLIZE=${LIBTOOLIZE:-glibtoolize}
+ ;;
+ *)
+ LIBTOOLIZE=${LIBTOOLIZE:-libtoolize}
+ ;;
+esac
+AUTORECONF=${AUTORECONF:-autoreconf}
+ACLOCAL=${ACLOCAL:-aclocal}
+AUTOCONF=${AUTOCONF:-autoconf}
+AUTOHEADER=${AUTOHEADER:-autoheader}
+AUTOMAKE=${AUTOMAKE:-automake}
+
+# Check we have all tools installed
+check_command() {
+ command -v "${1}" > /dev/null 2>&1 || {
+ >&2 echo "autogen.sh: could not find \`$1'. \`$1' is required to run autogen.sh."
+ exit 1
+ }
+}
+check_command "$LIBTOOLIZE"
+check_command "$AUTORECONF"
+check_command "$ACLOCAL"
+check_command "$AUTOCONF"
+check_command "$AUTOHEADER"
+check_command "$AUTOMAKE"
+
+# Absence of pkg-config or misconfiguration can make some odd error
+# messages, we check if it is installed correctly. See:
+# https://blogs.oracle.com/mandy/entry/autoconf_weirdness
+#
+# We cannot just check for pkg-config command, we need to check for
+# PKG_* macros. The pkg-config command can be defined in ./configure,
+# we cannot tell anything when not present.
+check_pkg_config() {
+ grep -q '^AC_DEFUN.*PKG_CHECK_MODULES' aclocal.m4 || {
+ cat <<EOF >&2
+autogen.sh: could not find PKG_CHECK_MODULES macro.
+
+ Either pkg-config is not installed on your system or
+ \`pkg.m4' is missing or not found by aclocal.
+
+ If \`pkg.m4' is installed at an unusual location, re-run
+ \`autogen.sh' by setting \`ACLOCAL_FLAGS':
+
+ ACLOCAL_FLAGS="-I <prefix>/share/aclocal" ./autogen.sh
+
+EOF
+ exit 1
+ }
+}
+
+