diff options
Diffstat (limited to 'SetFlags.cmake')
| -rw-r--r-- | SetFlags.cmake | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/SetFlags.cmake b/SetFlags.cmake index 4ef8ecd2a..d3a7801ee 100644 --- a/SetFlags.cmake +++ b/SetFlags.cmake @@ -96,9 +96,18 @@ function(set_global_flags) add_link_options(-m32) endif() + # https://en.wikipedia.org/wiki/Uname + # https://gcc.gnu.org/onlinedocs/gcc/index.html # Have the compiler generate code specifically targeted at the current machine on Linux: - if(LINUX AND NOT NO_NATIVE_OPTIMIZATION) - add_compile_options(-march=native) + if(UNIX AND NOT NO_NATIVE_OPTIMIZATION AND NOT CMAKE_CROSSCOMPILING) + string(TOLOWER ${CMAKE_SYSTEM_PROCESSOR} SYSTEM_PROCESSOR) + if (SYSTEM_PROCESSOR MATCHES "^(i386|i686|x86|amd64|mips)") + message(STATUS "Optimising for this machine (march=native)") + add_compile_options(-march=native) + elseif (SYSTEM_PROCESSOR MATCHES "^(arm|aarch|powerpc|ppc|sparc|alpha)") + message(STATUS "Optimising for this machine (mcpu=native)") + add_compile_options(-mcpu=native) + endif() endif() endfunction() |