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-rw-r--r--erts/configure.in26
1 files changed, 21 insertions, 5 deletions
diff --git a/erts/configure.in b/erts/configure.in
index b056ba44e2..64436e933c 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -150,6 +150,14 @@ AS_HELP_STRING([--disable-smp-support], [disable smp support]),
*) enable_smp_support=yes ;;
esac ], enable_smp_support=unknown)
+AC_ARG_ENABLE(smp-require-native-atomics,
+ AS_HELP_STRING([--disable-smp-require-native-atomics],
+ [disable the SMP requirement of a native atomic implementation]),
+[ case "$enableval" in
+ no) smp_require_native_atomics=no ;;
+ *) smp_require_native_atomics=yes ;;
+ esac ], smp_require_native_atomics=yes)
+
AC_ARG_WITH(termcap,
AS_HELP_STRING([--with-termcap], [use termcap (default)])
AS_HELP_STRING([--without-termcap],
@@ -1043,11 +1051,18 @@ if test $ERTS_BUILD_SMP_EMU = yes; then
AC_DEFINE(ERTS_HAVE_SMP_EMU, 1, [Define if the smp emulator is built])
- case "$ethr_have_native_atomics-$ethr_have_native_spinlock" in
+ test "X$smp_require_native_atomics" = "Xyes" &&
+ AC_DEFINE(ETHR_SMP_REQUIRE_NATIVE_IMPLS, 1, [Define if you want to enable check for native ethread implementations])
+
+ case "$ethr_have_native_atomics-$smp_require_native_atomics-$ethr_have_native_spinlock" in
yes-*)
;;
- no-yes)
+ no-yes-*)
+ AC_MSG_ERROR([No native atomic implementation found. See Configuring section in INSTALL.md for more information.])
+ ;;
+
+ no-no-yes)
test -f "$ERL_TOP/erts/CONF_INFO" ||
echo "" > "$ERL_TOP/erts/CONF_INFO"
@@ -1056,12 +1071,13 @@ if test $ERTS_BUILD_SMP_EMU = yes; then
No native atomic implementation available.
Fallbacks implemented using spinlocks will be
used. Note that the performance of the SMP
- runtime system will suffer due to this.
+ runtime system will suffer immensely due to
+ this.
EOF
;;
- no-no)
+ no-no-no)
test -f "$ERL_TOP/erts/CONF_INFO" ||
echo "" > "$ERL_TOP/erts/CONF_INFO"
@@ -1071,7 +1087,7 @@ EOF
spinlock implementation available. Fallbacks
implemented using mutexes will be used. Note
that the performance of the SMP runtime system
- will suffer much due to this.
+ will suffer immensely due to this.
EOF
;;