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-rw-r--r--configure.in3
1 files changed, 3 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index f4e9a60db2..9f2ffc315a 100644
--- a/configure.in
+++ b/configure.in
@@ -304,6 +304,9 @@ AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_INSTALL
+AC_CHECK_TOOL(DOT, dot)
+AC_CHECK_TOOL(DOXYGEN, doxygen)
+
# checks for UNIX variants that set C preprocessor variables
AC_USE_SYSTEM_EXTENSIONS