COMP: Fix try-compile to fail properly on HP.

Source/kwsys/CMakeLists.txt

@@ -267,6 +267,9 @@ IF(NOT CMAKE_COMPILER_IS_GNUCXX)
       SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -no_implicit_include")
     ENDIF(NOT KWSYS_CXX_FLAGS_HAVE_NO_IMPLICIT_INCLUDE)
   ENDIF(CMAKE_SYSTEM MATCHES "OSF1-V.*")
+  IF(CMAKE_SYSTEM MATCHES "HP-UX")
+    SET(KWSYS_PLATFORM_CXX_TEST_EXTRA_FLAGS "+p")
+  ENDIF(CMAKE_SYSTEM MATCHES "HP-UX")
 ENDIF(NOT CMAKE_COMPILER_IS_GNUCXX)
 
 #-----------------------------------------------------------------------------

Source/kwsys/kwsysPlatformCxxTests.cmake

@@ -4,7 +4,7 @@ MACRO(KWSYS_PLATFORM_CXX_TEST var description invert)
     TRY_COMPILE(${var}_COMPILED
       ${CMAKE_CURRENT_BINARY_DIR}
       ${CMAKE_CURRENT_SOURCE_DIR}/kwsysPlatformCxxTests.cxx
-      COMPILE_DEFINITIONS -DTEST_${var} ${KWSYS_PLATFORM_CXX_TEST_DEFINES}
+      COMPILE_DEFINITIONS -DTEST_${var} ${KWSYS_PLATFORM_CXX_TEST_DEFINES} ${KWSYS_PLATFORM_CXX_TEST_EXTRA_FLAGS}
       OUTPUT_VARIABLE OUTPUT)
     IF(${var}_COMPILED)
       FILE(APPEND 
@@ -50,7 +50,7 @@ MACRO(KWSYS_PLATFORM_CXX_TEST_RUN var description invert)
     TRY_RUN(${var} ${var}_COMPILED
       ${CMAKE_CURRENT_BINARY_DIR}
       ${CMAKE_CURRENT_SOURCE_DIR}/kwsysPlatformCxxTests.cxx
-      COMPILE_DEFINITIONS -DTEST_${var} ${KWSYS_PLATFORM_CXX_TEST_DEFINES}
+      COMPILE_DEFINITIONS -DTEST_${var} ${KWSYS_PLATFORM_CXX_TEST_DEFINES} ${KWSYS_PLATFORM_CXX_TEST_EXTRA_FLAGS}
       OUTPUT_VARIABLE OUTPUT)
 
     # Note that ${var} will be a 0 return value on success.