esac
AC_MSG_CHECKING(whether to build neon code)
AC_ARG_ENABLE(cpu-neon,
- AC_HELP_STRING([--enable-cpu-neon], [enable neon code]),
+ AC_HELP_STRING([--enable-cpu-neon], [enable neon code - with gcc you will need these CFLAGS for it to begin to work, and even then your gcc may have broken or non-existant support: -mcpu=cortex-a8 -mfloat-abi=softfp -mfpu=neon]),
[
- if test "x$enableval" = "xyes" ; then
- AC_MSG_RESULT(yes)
- AC_DEFINE(BUILD_NEON, 1, [Build NEON Code])
- build_cpu_neon="yes"
+ if test "x$enableval" = "xyes" ; then
+ AC_TRY_COMPILE([arm_neon.h],
+ [asm volatile ("vqadd.u8 d0, d1, d0\n");],
+ [
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(BUILD_NEON, 1, [Build NEON Code])
+ build_cpu_neon="yes"
+ ],[
+ AC_MSG_RESULT(no)
+ build_cpu_neon="no"
+ ])
else
AC_MSG_RESULT(no)
build_cpu_neon="no"
fi
],
[
- AC_MSG_RESULT($build_cpu_neon)
if test "x$build_cpu_neon" = "xyes" ; then
- AC_DEFINE(BUILD_NEON, 1, [Build NEON Code])
+ AC_TRY_COMPILE([arm_neon.h],
+ [asm volatile ("vqadd.u8 d0, d1, d0\n");],
+ [
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(BUILD_NEON, 1, [Build NEON Code])
+ build_cpu_neon="yes"
+ ],[
+ AC_MSG_RESULT(no)
+ build_cpu_neon="no"
+ ])
fi
]
)
-
+
#######################################
## C
build_cpu_c="yes"