Small fixes

Adding message for header only llibrary usage.
Adding `-fno-fast-math` flag to all tests if compiler is "IntelLLVM"

CMakeLists.txt

@@ -148,6 +148,7 @@ if (INSTALL_HEADER_ONLY)
     (${TUNING_TARGET} STREQUAL "INTEL_GPU") )
       target_compile_options(portblas INTERFACE -fno-fast-math)
       target_compile_options(portblas INTERFACE -mllvm -loopopt=0 )
+      message(STATUS "Adding -fno-fast-math -mllvm -loopopt=0 to portblas")
   endif()
 else()
   add_subdirectory(src)

test/unittest/CMakeLists.txt

@@ -101,13 +101,6 @@ if(is_dpcpp)
   )
 endif()
 
-
-# Contains tests that fail if compiled with -ffast-math
-set(SYCL_UNITTEST_NOFASTMATH
-  ${PORTBLAS_UNITTEST}/blas1/blas1_rotg_test.cpp
-  ${PORTBLAS_UNITTEST}/blas1/blas1_rotmg_test.cpp
-)
-
 if(GEMM_TALL_SKINNY_SUPPORT)
   list(APPEND SYCL_UNITTEST_SRCS ${PORTBLAS_UNITTEST}/blas3/blas3_gemm_tall_skinny_test.cpp)
 endif()
@@ -142,9 +135,7 @@ foreach(blas_test ${SYCL_UNITTEST_SRCS})
   target_link_libraries(${test_exec} PRIVATE gtest_main Clara::Clara blas::blas portblas)
   target_include_directories(${test_exec} PRIVATE ${CBLAS_INCLUDE} ${PORTBLAS_COMMON_INCLUDE_DIR})
 
-  list (FIND SYCL_UNITTEST_NOFASTMATH ${blas_test} _index)
-  if ((${CMAKE_CXX_COMPILER_ID} STREQUAL "IntelLLVM") AND (( NOT
-    ${TUNING_TARGET} STREQUAL "INTEL_GPU") OR (${_index} GREATER -1)) ) 
+  if (${CMAKE_CXX_COMPILER_ID} STREQUAL "IntelLLVM")
     target_compile_options(${test_exec} PRIVATE "-fno-fast-math")
   endif()