Make sure benchmark::benchmark stays optional (O2-1973) (#5231)

Author: ktf

Framework/Utils/CMakeLists.txt

@@ -87,6 +87,7 @@ o2_add_test(DPLRawParser
             COMPONENT_NAME DPLUtils
             LABELS dplutils)
 
+if (TARGET benchmark::benchmark)
 foreach(b
         RawParser
         )
@@ -96,3 +97,4 @@ foreach(b
               LABELS dplutils benchmark
               PUBLIC_LINK_LIBRARIES O2::DPLUtils benchmark::benchmark)
 endforeach()
+endif()

Utilities/Mergers/CMakeLists.txt

@@ -47,6 +47,7 @@ o2_add_executable(benchmark-empty-loop
                   COMPONENT_NAME mergers
                   PUBLIC_LINK_LIBRARIES O2::Mergers)
 
+if (TARGET benchmark::benchmark)
 o2_add_executable(benchmark-miscellaneous
                   SOURCES test/benchmark_Miscellaneous.cxx
                   COMPONENT_NAME mergers
@@ -66,6 +67,7 @@ o2_add_executable(benchmark-types
                   SOURCES test/benchmark_Types.cxx
                   COMPONENT_NAME mergers
                   PUBLIC_LINK_LIBRARIES O2::Mergers benchmark::benchmark)
+endif()
 
 o2_add_test(InfrastructureBuilder
             SOURCES test/test_InfrastructureBuilder.cxx
@@ -83,4 +85,4 @@ o2_add_test(ObjectStore
   SOURCES test/test_ObjectStore.cxx
   COMPONENT_NAME mergers
   PUBLIC_LINK_LIBRARIES O2::Mergers
-  LABELS utils)
+  LABELS utils)

Utilities/rANS/CMakeLists.txt

@@ -35,11 +35,13 @@ o2_add_test(CombinedIterator
             COMPONENT_NAME rANS
             LABELS utils)
 
+if (TARGET benchmark::benchmark)
 o2_add_executable(CombinedIterator
                     SOURCES benchmarks/bench_ransCombinedIterator.cxx
                     COMPONENT_NAME rANS
               IS_BENCHMARK
                     PUBLIC_LINK_LIBRARIES O2::rANS benchmark::benchmark)
+endif()
 
 o2_add_executable(rans-encode-decode-8
                   TARGETVARNAME targetName
@@ -57,4 +59,4 @@ o2_add_executable(rans-encode-decode-32
                   TARGETVARNAME targetName
                   SOURCES run/bin-encode-decode.cxx
                   PUBLIC_LINK_LIBRARIES O2::rANS Boost::program_options)
-target_compile_definitions(${targetName} PRIVATE -DSOURCE_T=uint32_t)
+target_compile_definitions(${targetName} PRIVATE -DSOURCE_T=uint32_t)