nmake/jom: Only warn about bad VS environment if compiler not found.

nmake and jom generators no longer warn about missing INCLUDE/LIB
environment variables unless the C/CXX compiler cannot be found.  This
is useful if the user does not want to use these generators with the
Visual C++ compiler, or they do not want to enable any language.

1 files changed, 17 insertions, 0 deletions

diff --git a/Tests/RunCMake/CompilerNotFound/BadCompilerCXX-stderr-JOM.txt b/Tests/RunCMake/CompilerNotFound/BadCompilerCXX-stderr-JOM.txt
new file mode 100644
index 0000000..4b42ea6
--- /dev/null
+++ b/Tests/RunCMake/CompilerNotFound/BadCompilerCXX-stderr-JOM.txt
@@ -0,0 +1,17 @@
+CMake Error at BadCompilerCXX.cmake:2 \(enable_language\):
+  The CMAKE_CXX_COMPILER:
+
+    no-CXX-compiler
+
+  is not a full path and was not found in the PATH.
+
+  To use the JOM generator with Visual C\+\+, cmake must be run from a shell
+  that can use the compiler cl from the command line.  This environment is
+  unable to invoke the cl compiler.  To fix this problem, run cmake from the
+  Visual Studio Command Prompt \(vcvarsall.bat\).
+
+  Tell CMake where to find the compiler by setting either the environment
+  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
+  to the compiler, or to the compiler name if it is in the PATH.
+Call Stack \(most recent call first\):
+  CMakeLists.txt:3 \(include\)$