diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 4b1ae7c3c9..86c29d75f2 100644 --- a/configure.ac +++ b/configure.ac @@ -390,6 +390,23 @@ AS_HELP_STRING([],[Tcl/Tk interpreter will be found in a system.]), GIT_PARSE_WITH(tcltk)) # +# Declare the with-sse42/without-sse42 options. +AC_ARG_WITH(sse42, +AS_HELP_STRING([--with-sse42],[use SSE4.2 instructions]) +AS_HELP_STRING([],[(default is YES if your compiler supports -msse4.2)]), +GIT_PARSE_WITH(sse42)) + +if test "$NO_SSE42" != "YesPlease"; then + dnl Check if -msse4.2 works. + AC_CACHE_CHECK(for SSE4.2 support, cc_cv_sse42, [dnl + LIBC_TRY_CC_OPTION([-msse4.2], [cc_cv_sse42=yes], [cc_cv_sse42=no]) + ]) + if test $cc_cv_sse42 = no; then + NO_SSE42=1 + fi +fi + +GIT_CONF_SUBST([NO_SSE42]) ## Checks for programs. AC_MSG_NOTICE([CHECKS for programs]) |