[Windows] error if $ROOTSYS environment variable undefined

rest-for-physics · Feb 14, 2022 · 071f2af · 071f2af
1 parent d0e11da
commit 071f2af
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/cmake/FindROOT.cmake b/cmake/FindROOT.cmake
@@ -15,7 +15,9 @@
 if (CMAKE_SYSTEM_NAME MATCHES "Windows")
 
   if(DEFINED ENV{ROOTSYS})
-   set(ROOTSYS $ENV{ROOTSYS})
+    set(ROOTSYS $ENV{ROOTSYS})
+  else()
+    message(FATAL_ERROR "ROOTSYS environment variable is undefined. Did you forget to source the `thisroot.bat`?")
   endif()
 
   if(NOT ROOTSYS)