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-rw-r--r--configure.ac4
-rw-r--r--doc.am4
2 files changed, 6 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac
index 7a7262f967..934ced5d72 100644
--- a/configure.ac
+++ b/configure.ac
@@ -121,6 +121,10 @@ AC_CACHE_SAVE
m4_include([config-daemon.ac])
+dnl `dot' (from the Graphviz package) is only needed for maintainers.
+dnl See `HACKING' for more info.
+AM_MISSING_PROG([DOT], [dot])
+
AC_CONFIG_FILES([Makefile
po/Makefile.in
guix/config.scm])
diff --git a/doc.am b/doc.am
index afd492c605..2bc3416edd 100644
--- a/doc.am
+++ b/doc.am
@@ -33,11 +33,11 @@ DOT_OPTIONS = \
-Nfontsize=9 -Nheight=.1 -Nwidth=.1
.dot.png:
- dot -Tpng $(DOT_OPTIONS) < "$<" > "$@.tmp"
+ $(DOT) -Tpng $(DOT_OPTIONS) < "$<" > "$@.tmp"
mv "$@.tmp" "$@"
.dot.eps:
- dot -Teps $(DOT_OPTIONS) < "$<" > "$@.tmp"
+ $(DOT) -Teps $(DOT_OPTIONS) < "$<" > "$@.tmp"
mv "$@.tmp" "$@"
# We cannot add new dependencies to `doc/guix.pdf' & co. (info "(automake)