Remove use of an old hack that takes advantage of the auto-dereference
behavior of the if() command to detect if a variable is defined. The
hack has the form:

 if("${VAR} MATCHES "^${VAR}$")

where "${VAR}" is a macro argument reference. Use if(DEFINED) instead.
This also avoids warnings for CMake Policy CMP0054 in CMake 3.1.

---
 CMake/Macros.cmake | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/CMake/Macros.cmake b/CMake/Macros.cmake
index df15b74..dab005f 100644
--- a/CMake/Macros.cmake
+++ b/CMake/Macros.cmake
@@ -27,7 +27,7 @@ endmacro(CHECK_INCLUDE_FILE_CONCAT)
 
 # For other curl specific tests, use this macro.
 macro(CURL_INTERNAL_TEST CURL_TEST)
-  if("${CURL_TEST}" MATCHES "^${CURL_TEST}$")
+  if(NOT DEFINED "${CURL_TEST}")
     set(MACRO_CHECK_FUNCTION_DEFINITIONS
       "-D${CURL_TEST} ${CURL_TEST_DEFINES} ${CMAKE_REQUIRED_FLAGS}")
     if(CMAKE_REQUIRED_LIBRARIES)
@@ -55,11 +55,11 @@ macro(CURL_INTERNAL_TEST CURL_TEST)
         "Performing Curl Test ${CURL_TEST} failed with the following output:\n"
         "${OUTPUT}\n")
     endif(${CURL_TEST})
-  endif("${CURL_TEST}" MATCHES "^${CURL_TEST}$")
+  endif()
 endmacro(CURL_INTERNAL_TEST)
 
 macro(CURL_INTERNAL_TEST_RUN CURL_TEST)
-  if("${CURL_TEST}_COMPILE" MATCHES "^${CURL_TEST}_COMPILE$")
+  if(NOT DEFINED "${CURL_TEST}_COMPILE")
     set(MACRO_CHECK_FUNCTION_DEFINITIONS
       "-D${CURL_TEST} ${CMAKE_REQUIRED_FLAGS}")
     if(CMAKE_REQUIRED_LIBRARIES)
@@ -91,5 +91,5 @@ macro(CURL_INTERNAL_TEST_RUN CURL_TEST)
       file(APPEND "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log"
         "\n\n")
     endif(${CURL_TEST}_COMPILE AND NOT ${CURL_TEST})
-  endif("${CURL_TEST}_COMPILE" MATCHES "^${CURL_TEST}_COMPILE$")
+  endif()
 endmacro(CURL_INTERNAL_TEST_RUN)
-- 
2.1.1
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