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-rw-r--r--configure.ac2
1 files changed, 2 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index a5b212ea..4a321d5c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,6 +18,8 @@ AC_CANONICAL_HOST
# Set up the compiler in two different ways and say yes we may want to install.
AC_PROG_CC
AM_PROG_CC_C_O
+AC_PROG_CPP
+AC_PROG_EGREP
AC_PROG_INSTALL
# Default tmux.conf goes in /etc not ${prefix}/etc.