Change base arch from nehalem to ivybridge (#138)

Author: dian-lun-lin

CMakeLists.txt

@@ -80,7 +80,7 @@ include("cmake/toml.cmake")
 add_library(svs_x86_options_base INTERFACE)
 add_library(svs::x86_options_base ALIAS svs_x86_options_base)
 if(CMAKE_SYSTEM_PROCESSOR MATCHES "(x86)|(X86)|(amd64)|(AMD64)")
-    target_compile_options(svs_x86_options_base INTERFACE -march=nehalem -mtune=nehalem)
+    target_compile_options(svs_x86_options_base INTERFACE -march=ivybridge -mtune=ivybridge)
     include("cmake/multi-arch.cmake")
 endif()
 
@@ -120,7 +120,7 @@ set(LIB_CONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/svs")
 
 # Install headers and target information.
 install(
-    TARGETS svs_export svs_devel svs_compile_options svs_native_options
+    TARGETS svs_export svs_devel svs_compile_options svs_native_options svs_x86_options_base
     EXPORT svs-targets
     INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )