From: Matthias Maier <tamiko@43-1.org>
Date: Tue, 23 May 2023 11:44:17 +0000 (-0500)
Subject: CMake: add another prominent warning
X-Git-Tag: v9.5.0-rc1~200^2~2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=79b928e3de01c43fd2ff70c40aa3b3652f2f698c;p=dealii.git

CMake: add another prominent warning
---

diff --git a/cmake/macros/macro_define_interface_target.cmake b/cmake/macros/macro_define_interface_target.cmake
index afa17aabc3..a3dff00f31 100644
--- a/cmake/macros/macro_define_interface_target.cmake
+++ b/cmake/macros/macro_define_interface_target.cmake
@@ -92,6 +92,16 @@ function(define_interface_target _feature)
       ${${_feature}_LIBRARIES} ${${_feature}_LIBRARIES_${_build}}
       )
     if(NOT "${_libraries}" STREQUAL "")
+      foreach(_lib ${_libraries})
+        # Warn loudly if we encounter an undefined target:
+        if("${_lib}" MATCHES "::")
+          message(WARNING
+            "Undefined imported target name »${_lib}« present when defining "
+            "interface target »${_interface_target}«"
+            )
+        endif()
+      endforeach()
+
       message(STATUS "    LINK_LIBRARIES:      ${_libraries}")
       target_link_libraries(${_interface_target} INTERFACE ${_libraries})
     endif()