|
|
- --- a/config.h.in
- +++ b/config.h.in
- @@ -45,6 +45,9 @@
- /* Define to 1 if you have the `arc4random_uniform' function. */
- #undef HAVE_ARC4RANDOM_UNIFORM
-
- +/* Define if the ARM yield instruction is available */
- +#undef HAVE_ARM_YIELD
- +
- /* Define to 1 if the compiler supports __builtin_clz. */
- #undef HAVE_BUILTIN_CLZ
-
- --- a/configure.ac
- +++ b/configure.ac
- @@ -421,8 +421,8 @@ AS_CASE([$host],
- [[]],
- [[__asm__ __volatile__ ("yield")]]
- )],
- - [AC_MSG_RESULT([yes])],
- - [AC_MSG_ERROR([no, try adding -march=native or -march=armv7-a to CFLAGS (see PLATFORMS.md for more information)])])])
- + [AC_MSG_RESULT([yes]) AC_DEFINE([HAVE_ARM_YIELD],[1],[Define if the ARM yield instruction is available])],
- + [AC_MSG_RESULT([no])])])
-
- AC_CHECK_FUNCS([sysctlbyname])
-
- --- a/lib/isc/rwlock.c
- +++ b/lib/isc/rwlock.c
- @@ -54,7 +54,7 @@
- # define isc_rwlock_pause() __asm__ __volatile__ ("rep; nop")
- #elif defined(__ia64__)
- # define isc_rwlock_pause() __asm__ __volatile__ ("hint @pause")
- -#elif defined(__arm__)
- +#elif defined(__arm__) && HAVE_ARM_YIELD
- # define isc_rwlock_pause() __asm__ __volatile__ ("yield")
- #elif defined(sun) && (defined(__sparc) || defined(__sparc__))
- # define isc_rwlock_pause() smt_pause()
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