1 files changed, 4 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 2bb5a63c8..005a9ead5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -373,6 +373,7 @@ AC_CHECK_HEADERS([ \
         dirent.h \
         endian.h \
         elf.h \
+        err.h \
         features.h \
         fcntl.h \
         floatingpoint.h \
@@ -1692,6 +1693,8 @@ AC_CHECK_FUNCS([ \
         closefrom \
         dirfd \
         endgrent \
+        err \
+        errx \
         explicit_bzero \
         fchmod \
         fchown \
@@ -1783,6 +1786,7 @@ AC_CHECK_FUNCS([ \
         vasprintf \
         vsnprintf \
         waitpid \
+        warn \
 ])
 
 AC_LINK_IFELSE(