From 4e61b73173e5a5e9b50da49a4e41fbb97ebbeb22 Mon Sep 17 00:00:00 2001
From: Hui Zhou <hzhou321@anl.gov>
Date: Mon, 28 Mar 2022 14:16:07 -0500
Subject: [PATCH] autogen: add message when submodule is missing

Add message to advise users to run git submodule checkout when they just
cloned the repository.
---
 autogen.sh | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/autogen.sh b/autogen.sh
index fd2ae714e21..6b3fdea3d2d 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -125,7 +125,10 @@ ProgHomeDir() {
 # checking and patching submodules
 check_submodule_presence() {
     if test ! -f "$SRCROOTDIR/$1/configure.ac"; then
-        error "Submodule $1 is not checked out"
+        error "Submodule $1 is not checked out."
+        error "if you just git cloned this repository, run"
+        error "    git submodule update --init"
+        error "to checkout the submodules."
         exit 1
     fi
 }
@@ -191,9 +194,6 @@ set_externals() {
     if test -z "$externals" ; then
         #TODO: if necessary, run: git submodule update --init
 
-        # hwloc is always required
-        check_submodule_presence modules/hwloc
-
         # external packages that require autogen.sh to be run for each of them
         externals="test/mpi"