kc3-lang/kc3

diff --git a/config.subr b/config.subr
index ad8a521..9ff8086 100644
--- a/config.subr
+++ b/config.subr
@@ -81,8 +81,10 @@ config_include() {
     echo "int main () { return 0; }" >> "$OUT"
     if ${CC} ${CPPFLAGS} ${CFLAGS} "$OUT" -o /dev/null 2>/dev/null; then
         echo "#define $1 1" >> "${CONFIG_H}"
+        eval "$1=Yes"
     else
         echo "#define $1 0" >> "${CONFIG_H}"
+        eval "$1=No"
     fi
     rm "$OUT"
 }
diff --git a/libc3/configure b/libc3/configure
index 15e35f3..32cc7be 100755
--- a/libc3/configure
+++ b/libc3/configure
@@ -49,6 +49,10 @@ config_include sha_h sys/types.h sha.h HAVE_SHA_H
 config_include sha1_h sys/types.h sha1.h HAVE_SHA1_H
 update_config_h
 
+if [ "x${HAVE_SHA_H}" = "xYes" ]; then
+    LIBS="${LIBS} -lmd"
+fi
+
 # Address Sanitizer config
 CFLAGS_ASAN="$CFLAGS -fsanitize=address -O1 -fno-omit-frame-pointer -g"
 LDFLAGS_ASAN="$LDFLAGS"