diff options
Diffstat (limited to 'libstdc++-v3/acinclude.m4')
| -rw-r--r-- | libstdc++-v3/acinclude.m4 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4 index eac8aeda48b..6aece2adff8 100644 --- a/libstdc++-v3/acinclude.m4 +++ b/libstdc++-v3/acinclude.m4 @@ -3612,6 +3612,9 @@ AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [ dnl Why don't we check 8-byte CAS for sparc64, where _Atomic_word is long?! dnl New targets should only check for CAS for the _Atomic_word type. AC_TRY_COMPILE([ + #if defined __riscv + # error "Defaulting to mutex-based locks for ABI compatibility" + #endif #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 # error "No 2-byte compare-and-swap" #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 |