From e7c64848f4182ae7ac2b50786a1641639b3d17ad Mon Sep 17 00:00:00 2001
From: Mark Gates <mgates3@icl.utk.edu>
Date: Mon, 26 Oct 2020 13:47:04 -0400
Subject: [PATCH] cmake: check if subdir CMakeLists exist

---
 CMakeLists.txt      | 16 +++++++++++++---
 test/CMakeLists.txt | 12 +++++++++++-
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 266a86db4..95734cc2c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -323,7 +323,7 @@ if (NOT TARGET blaspp)
     find_package( blaspp QUIET )
     if (blaspp_FOUND)
         message( "   Found BLAS++: ${blaspp_DIR}" )
-    else()
+    elseif (EXISTS "${CMAKE_SOURCE_DIR}/blaspp/CMakeLists.txt")
         set( build_tests_save "${build_tests}" )
         set( build_tests "false" )
 
@@ -331,6 +331,10 @@ if (NOT TARGET blaspp)
 
         set( build_tests "${build_tests_save}" )
         set( blaspp_DIR "${CMAKE_BINARY_DIR}/blaspp" )
+    else()
+        message( FATAL_ERROR "blaspp/CMakeLists.txt doesn't exist. Use:\n"
+                 "    git submodule update --init\n"
+                 "to checkout submodules." )
     endif()
 else()
     message( "   BLAS++ already included" )
@@ -344,14 +348,20 @@ if (NOT TARGET lapackpp)
     find_package( lapackpp QUIET )
     if (lapackpp_FOUND)
         message( "   Found LAPACK++: ${lapackpp_DIR}" )
-    else()
+
+    elseif (EXISTS "${CMAKE_SOURCE_DIR}/lapackpp/CMakeLists.txt")
         set( build_tests_save "${build_tests}" )
         set( build_tests "false" )
 
         add_subdirectory( "lapackpp" )
 
         set( build_tests "${build_tests_save}" )
-        set( blaspp_DIR "${CMAKE_BINARY_DIR}/blaspp" )
+        set( lapackpp_DIR "${CMAKE_BINARY_DIR}/lapackpp" )
+
+    else()
+        message( FATAL_ERROR "lapackpp/CMakeLists.txt doesn't exist. Use:\n"
+                 "    git submodule update --init\n"
+                 "to checkout submodules." )
     endif()
 else()
     message( "   LAPACK++ already included" )
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 5e07606b8..932ae1ebf 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -33,11 +33,21 @@ if (NOT TARGET testsweeper)
     find_package( testsweeper QUIET )
     if (testsweeper_FOUND)
         message( "   Found TestSweeper library: ${testsweeper_DIR}" )
-    else()
 
+    elseif (EXISTS "${CMAKE_SOURCE_DIR}/testsweeper/CMakeLists.txt")
         add_subdirectory( "${CMAKE_SOURCE_DIR}/testsweeper"
                           "${CMAKE_BINARY_DIR}/testsweeper" )
 
+    else()
+        set( url "https://bitbucket.org/icl/testsweeper" )
+        message( "" )
+        message( "---------- TestSweeper" )
+        message( STATUS "Fetching TestSweeper from ${url}" )
+        include( FetchContent )
+        FetchContent_Declare( testsweeper GIT_REPOSITORY "${url}" )
+        FetchContent_MakeAvailable( testsweeper )
+        message( "---------- TestSweeper done" )
+        message( "" )
     endif()
 else()
     message( "   TestSweeper already included" )