Workaround for cmake having its own C_COMPILER variable

cmake/utils.cmake

@@ -74,6 +74,9 @@ macro(ParseMakefileVars MAKEFILE_IN)
           string(REGEX MATCH "ifneq \\(\\$\\(([_A-Z]+)\\),[ \t]*([0-9_A-Z]+)\\)" line_match "${makefile_line}")
           if (NOT "${line_match}" STREQUAL "")
 #            message(STATUS "IFNEQ: ${line_match} first: ${CMAKE_MATCH_1} second: ${CMAKE_MATCH_2}")
+            if ( ${CMAKE_MATCH_1} STREQUAL C_COMPILER)
+                 set (CMAKE_MATCH_1 CMAKE_C_COMPILER)
+            endif ()
             if (NOT ( ${${CMAKE_MATCH_1}} STREQUAL ${CMAKE_MATCH_2}))
 #              message (STATUS "condition is true")
               set (IfElse 1)