build: Minor debugging fixes to dependency_utils

* Have build_dependency_with_cmake print the error message if the git
  repo can't be cloned.
* Fix mis-quoted env variable in status message.
* Improve gramma of status message.

Signed-off-by: Larry Gritz <lg@larrygritz.com>

Author: lgritz

src/cmake/dependency_utils.cmake

@@ -100,7 +100,7 @@ function (print_package_notfound_report)
     message (STATUS "${ColorBoldYellow}=========================================================================${ColorReset}")
     message (STATUS)
     if (CFP_EXTERNAL_BUILD_DEPS_FOUND)
-        message (STATUS "${ColorBoldWhite}The following dependencies found externally:${ColorReset}")
+        message (STATUS "${ColorBoldWhite}The following dependencies were found externally:${ColorReset}")
         list (SORT CFP_EXTERNAL_BUILD_DEPS_FOUND CASE INSENSITIVE)
         list (REMOVE_DUPLICATES CFP_EXTERNAL_BUILD_DEPS_FOUND)
         foreach (_pkg IN LISTS CFP_EXTERNAL_BUILD_DEPS_FOUND)
@@ -161,8 +161,8 @@ function (handle_package_notfound pkgname required)
     message (STATUS "${ColorRed}${pkgname} library not found ${ColorReset}")
     if (${pkgname}_ROOT)
         message (STATUS "    ${pkgname}_ROOT was: ${${pkgname}_ROOT}")
-    elseif ($ENV{${pkgname}_ROOT})
-        message (STATUS "    ENV ${pkgname}_ROOT was: ${${pkgname}_ROOT}")
+    elseif (DEFINED ENV{${pkgname}_ROOT})
+        message (STATUS "    ENV ${pkgname}_ROOT was: $ENV{${pkgname}_ROOT}")
     else ()
         message (STATUS "    Try setting ${pkgname}_ROOT ?")
     endif ()
@@ -654,7 +654,7 @@ macro (build_dependency_with_cmake pkgname)
                                 ${${pkgname}_GIT_CLONE_ARGS}
                         ${_pkg_exec_quiet})
         if (NOT IS_DIRECTORY ${${pkgname}_LOCAL_SOURCE_DIR})
-            message (FATAL_ERROR "Could not download ${_pkg_GIT_REPOSITORY}")
+            message (FATAL_ERROR "Could not download ${_pkg_GIT_REPOSITORY}: ${${pkgname}_clone_errors}")
         endif ()
     endif ()
     # Checkout and verify the source against the expected commit hash to