[test-suite] Set -lm more fine-grained, making general cmake rules a bit cleaner.

[kristof.beyls]

Summary

This reverts r255239 which did set -lm on all MultiSource links, and
instead sets it more fine-grained. An unnecessarily broad appending of
-lm in SingleSource/CMakeLists.txt is also removed.

The patch was tested both on Ubuntu Linux and OSX.

[MatzeB]

Thanks for looking into this!

I also think changes like this are simple enough to work with post-commit reviews.

test-suite/trunk/MultiSource/Benchmarks/VersaBench/dbms/CMakeLists.txt

 # Autogenerated from MultiSource/Benchmarks/VersaBench/dbms/Makefile
 
 set(DIRS)
 set(PARALLEL_DIRS)
 
 set(LEVEL ../../../..)
 set(PROG dbms)
+list(APPEND LDFLAGS -lm)
 if(DEFINED SMALL_PROBLEM_SIZE)
   set(RUN_OPTIONS -i ${CMAKE_CURRENT_SOURCE_DIR}/dbms.train.in)
 else()
   set(RUN_OPTIONS -i ${CMAKE_CURRENT_SOURCE_DIR}/dbms.ref.in)
 endif()
 llvm_multisource()
 
 llvm_add_subdirectories(${DIRS} ${PARALLEL_DIRS})

test-suite/trunk/MultiSource/Benchmarks/nbench/CMakeLists.txt

 # Autogenerated from MultiSource/Benchmarks/nbench/Makefile
 
 set(DIRS)
 set(PARALLEL_DIRS)
 
 set(LEVEL ../../..)
 set(PROG nbench)
 set(CPPFLAGS -DBASE_ITERATIONS=25)
-set(LDFLAGS )
+set(LDFLAGS -lm)
 if("${ARCH}" STREQUAL "XCore")
   set(RUNTIMELIMIT 7200)
 else()
   set(RUNTIMELIMIT 750)
 endif()
 
 add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/NNET.DAT
     COMMAND cp ${CMAKE_CURRENT_SOURCE_DIR}/NNET.DAT ${CMAKE_CURRENT_BINARY_DIR}/NNET.DAT
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
     COMMENT "Copying nbench test input")
 add_custom_target(nbench_input SOURCES ${CMAKE_CURRENT_BINARY_DIR}/NNET.DAT)
     llvm_multisource()
 add_dependencies(nbench nbench_input)
 llvm_add_subdirectories(${DIRS} ${PARALLEL_DIRS})

test-suite/trunk/SingleSource/CMakeLists.txt

 # Autogenerated from SingleSource/Makefile
 
 set(DIRS)
 set(PARALLEL_DIRS)
 
 set(LEVEL ..)
 set(PARALLEL_DIRS Regression Benchmarks)
 if(NOT DEFINED BENCHMARKING_ONLY)
   list(APPEND PARALLEL_DIRS UnitTests)
 endif()
-list(APPEND LDFLAGS -lm)
 llvm_singlesource()
 
 llvm_add_subdirectories(${DIRS} ${PARALLEL_DIRS})
 
 file(COPY lit.local.cfg DESTINATION "${CMAKE_CURRENT_BINARY_DIR}")

test-suite/trunk/SingleSource/Regression/C/CMakeLists.txt

 # Autogenerated from SingleSource/Regression/C/Makefile
 
 set(DIRS)
 set(PARALLEL_DIRS)
 
 set(LEVEL ../../..)
 if("${ARCH}" STREQUAL "x86")
   if(DEFINED USE_REFERENCE_OUTPUT)
     set(EXEC_XFAILS casts)
   endif()
 endif()
 if(DEFINED BENCHMARKING_ONLY)
   list(APPEND PROGRAMS_TO_SKIP 2003-05-14-initialize-string 2003-05-21-BitfieldHandling 2003-05-21-UnionBitfields 2003-05-21-UnionTest 2003-05-22-LocalTypeTest 2003-05-22-VarSizeArray 2003-05-23-TransparentUnion 2003-06-16-InvalidInitializer 2003-06-16-VolatileError 2003-10-12-GlobalVarInitializers 2004-02-03-AggregateCopy 2004-03-15-IndirectGoto 2005-05-06-LongLongSignedShift 2008-01-07-LongDouble badidx bigstack callargs casts compare ConstructorDestructorAttributes DuffsDevice globalrefs matrixTranspose pointer_arithmetic PR10189 PR1386 PR491 PR640 sumarray sumarray2d sumarraymalloc test_indvars testtrace)
 endif()
+list(APPEND LDFLAGS -lm)
 llvm_singlesource()
 
 llvm_add_subdirectories(${DIRS} ${PARALLEL_DIRS})

test-suite/trunk/cmake/modules/SingleMultiSource.cmake

if(${name_idx} EQUAL -1)
     include_directories(${CMAKE_CURRENT_SOURCE_DIR})
     include_directories(${CMAKE_CURRENT_BINARY_DIR})
     get_unique_exe_name(source_exename "${PROG}.c")
     add_executable(${source_exename} ${sources})
     append_cflags(${source_exename} CFLAGS)
     append_cflags(${source_exename} CPPFLAGS)
     append_cflags(${source_exename} CXXFLAGS)
     append_ldflags(${source_exename} LDFLAGS)
-    target_link_libraries(${source_exename} -lm)
     llvm_add_test(${PROG} ${source_exename})
     add_dependencies(${source_exename} timeit timeit-target fpcmp)
   endif()
   endif()
 endmacro()
 
 macro(llvm_test_run)
   CMAKE_PARSE_ARGUMENTS(ARGS "" "RUN_TYPE;EXECUTABLE;WORKDIR" "" ${ARGN})