Remove redundant costly Kleene stars from regex searches

Some of the string(REGEX MATCH) operations surround the pattern with ".*", causing the CMake process to effectively wedge when trying to match on larger (100KiB) bodies of input. This commit removes those parts without any change in semantics as MATCH patterns only need to match the actual match. This should fix bug STEllAR-GROUP#1040.
zao · Jan 6, 2014 · b9d4472 · b9d4472
1 parent f3fbd9b
commit b9d4472
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/cmake/HPX_Compile.cmake b/cmake/HPX_Compile.cmake
@@ -83,12 +83,12 @@ if(NOT CMAKE_CROSSCOMPILING)
         )
         if(${name}_STDERR)
           if("${CMAKE_${${name}_LANGUAGE}_COMPILER_ID}" STREQUAL "Intel")
-            string(REGEX MATCH ".*command line warning #.*" ${name}_HAS_COMMAND_LINE_WARNING ${${name}_STDERR})
+            string(REGEX MATCH "command line warning #" ${name}_HAS_COMMAND_LINE_WARNING ${${name}_STDERR})
             if(${name}_HAS_COMMAND_LINE_WARNING)
               set(${name}_RESULT "1")
             endif()
           elseif("${CMAKE_${${name}_LANGUAGE}_COMPILER_ID}" STREQUAL "Clang")
-            string(REGEX MATCH ".*(argument unused during compilation|unknown warning option).*" ${name}_HAS_UNUSED_ARGUMENT_WARNING ${${name}_STDERR})
+            string(REGEX MATCH "(argument unused during compilation|unknown warning option)" ${name}_HAS_UNUSED_ARGUMENT_WARNING ${${name}_STDERR})
           endif()
         endif()
         file(WRITE ${CMAKE_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/${name}.${${name}_LANGUAGE}.log ${${name}_STDERR} ${${name}_STDOUT} "\n")
@@ -120,12 +120,12 @@ else()
     if(${name}_RESULT)
       set(${name}_RESULT "0")
       if("${CMAKE_${${name}_LANGUAGE}_COMPILER_ID}" STREQUAL "Intel")
-        string(REGEX MATCH ".*command line warning #.*" ${name}_HAS_COMMAND_LINE_WARNING ${${name}_OUT})
+        string(REGEX MATCH "command line warning #" ${name}_HAS_COMMAND_LINE_WARNING ${${name}_OUT})
         if(${name}_HAS_COMMAND_LINE_WARNING)
           set(${name}_RESULT "1")
         endif()
       elseif("${CMAKE_${${name}_LANGUAGE}_COMPILER_ID}" STREQUAL "Clang")
-        string(REGEX MATCH ".*(argument unused during compilation|unknown warning option).*" ${name}_HAS_UNUSED_ARGUMENT_WARNING ${${name}_OUT})
+        string(REGEX MATCH "(argument unused during compilation|unknown warning option)" ${name}_HAS_UNUSED_ARGUMENT_WARNING ${${name}_OUT})
       endif()
     else()
       set(${name}_RESULT "1")