[roottest] Remove sequential compilation with Ninja.

Roottest tests were compiled sequentially when Ninja was in use, to
avoid a problem (the commit doesn't mention details). Since that was 8
years ago, we should give parallel Ninja another try.

Author: hageboeck

roottest/cmake/modules/RoottestMacros.cmake

@@ -264,9 +264,6 @@ macro(ROOTTEST_COMPILE_MACRO filename)
     set_property(TEST ${COMPILE_MACRO_TEST} PROPERTY FAIL_REGULAR_EXPRESSION "Warning in")
   endif()
   set_property(TEST ${COMPILE_MACRO_TEST} PROPERTY ENVIRONMENT ${ROOTTEST_ENVIRONMENT})
-  if(CMAKE_GENERATOR MATCHES Ninja AND NOT MSVC)
-    set_property(TEST ${COMPILE_MACRO_TEST} PROPERTY RUN_SERIAL true)
-  endif()
   if (ARG_FIXTURES_SETUP)
     set_property(TEST ${COMPILE_MACRO_TEST} PROPERTY
       FIXTURES_SETUP ${ARG_FIXTURES_SETUP})
@@ -370,9 +367,6 @@ macro(ROOTTEST_GENERATE_DICTIONARY dictname)
                                     -- ${always-make})
 
   set_property(TEST ${GENERATE_DICTIONARY_TEST} PROPERTY ENVIRONMENT ${ROOTTEST_ENVIRONMENT})
-  if(CMAKE_GENERATOR MATCHES Ninja AND NOT MSVC)
-    set_property(TEST ${GENERATE_DICTIONARY_TEST} PROPERTY RUN_SERIAL true)
-  endif()
 
   if (ARG_FIXTURES_SETUP)
     set_property(TEST ${GENERATE_DICTIONARY_TEST} PROPERTY
@@ -487,9 +481,6 @@ macro(ROOTTEST_GENERATE_REFLEX_DICTIONARY dictionary)
                                     -- ${always-make})
 
   set_property(TEST ${GENERATE_REFLEX_TEST} PROPERTY ENVIRONMENT ${ROOTTEST_ENVIRONMENT})
-  if(CMAKE_GENERATOR MATCHES Ninja AND NOT MSVC)
-    set_property(TEST ${GENERATE_REFLEX_TEST} PROPERTY RUN_SERIAL true)
-  endif()
 
   if (ARG_FIXTURES_SETUP)
     set_property(TEST ${GENERATE_REFLEX_TEST} PROPERTY
@@ -609,10 +600,6 @@ macro(ROOTTEST_GENERATE_EXECUTABLE executable)
       RESOURCE_LOCK ${ARG_RESOURCE_LOCK})
   endif()
 
-  if(CMAKE_GENERATOR MATCHES Ninja AND NOT MSVC)
-    set_property(TEST ${GENERATE_EXECUTABLE_TEST} PROPERTY RUN_SERIAL true)
-  endif()
-
   if(MSVC AND NOT CMAKE_GENERATOR MATCHES Ninja)
     add_custom_command(TARGET ${executable} POST_BUILD
        COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/${executable}.exe