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-rw-r--r--erts/configure.in63
1 files changed, 29 insertions, 34 deletions
diff --git a/erts/configure.in b/erts/configure.in
index 1676d3d216..481dfe405e 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script. -*-m4-*-
dnl %CopyrightBegin%
dnl
-dnl Copyright Ericsson AB 1997-2014. All Rights Reserved.
+dnl Copyright Ericsson AB 1997-2015. All Rights Reserved.
dnl
dnl The contents of this file are subject to the Erlang Public License,
dnl Version 1.1, (the "License"); you may not use this file except in
@@ -264,24 +264,6 @@ AS_HELP_STRING([--enable-m32-build],
esac
],enable_m32_build=no)
-AC_SUBST(PERFCTR_PATH)
-AC_ARG_WITH(perfctr,
-AS_HELP_STRING([--with-perfctr=PATH],
- [specify location of perfctr include and lib])
-AS_HELP_STRING([--without-perfctr], [don't use perfctr (default)]))
-
-if test "x$with_perfctr" = "xno" -o "x$with_perfctr" = "x" ; then
- PERFCTR_PATH=
-else
- if test ! -f "$with_perfctr/usr.lib/libperfctr.a" ; then
- AC_MSG_ERROR(Invalid path to option --with-perfctr=PATH)
- fi
- PERFCTR_PATH="$with_perfctr"
- AC_DEFINE(USE_PERFCTR,[1],
- [Define to enable hrvtime() on Linux systems with perfctr extension])
-fi
-
-
AC_ARG_WITH(dynamic-trace,
AS_HELP_STRING([--with-dynamic-trace={dtrace|systemtap}],
[specify use of dynamic trace framework, dtrace or systemtap])
@@ -1123,10 +1105,31 @@ if test $ERTS_BUILD_SMP_EMU = yes; then
case "$ethr_have_native_atomics-$smp_require_native_atomics-$ethr_have_native_spinlock" in
yes-*)
+ if test "$ethr_native_atomic_implementation" = "gcc_sync"; then
+ test -f "$ERL_TOP/erts/CONF_INFO" ||
+ echo "" > "$ERL_TOP/erts/CONF_INFO"
+ cat >> $ERL_TOP/erts/CONF_INFO <<EOF
+
+ WARNING:
+ Only gcc's __sync_* builtins available for
+ atomic memory access. This will cause lots
+ of expensive and unnecessary memory barrier
+ instructions to be issued which will make
+ the performance of the runtime system
+ suffer. You are *strongly* advised to
+ upgrade to a gcc version that supports the
+ __atomic_* builtins (at least gcc version
+ 4.7) or build with libatomic_ops. See the
+ "Atomic Memory Operations and the VM"
+ chapter of \$ERL_TOP/HOWTO/INSTALL.md for
+ more information.
+
+EOF
+ fi
;;
no-yes-*)
- AC_MSG_ERROR([No native atomic implementation found. See Configuring section in INSTALL.md for more information.])
+ AC_MSG_ERROR([No native atomic implementation found. See the \"Atomic Memory Operations and the VM\" chapter of \$ERL_TOP/HOWTO/INSTALL.md for more information.])
;;
no-no-yes)
@@ -1784,7 +1787,7 @@ if test x"$ac_cv_header_netinet_sctp_h" = x"yes"; then
AC_CHECK_DECLS([SCTP_UNORDERED, SCTP_ADDR_OVER, SCTP_ABORT,
SCTP_EOF, SCTP_SENDALL, SCTP_ADDR_CONFIRMED,
SCTP_DELAYED_ACK_TIME,
- SCTP_EMPTY,
+ SCTP_EMPTY, SCTP_UNCONFIRMED,
SCTP_CLOSED, SCTPS_IDLE,
SCTP_BOUND, SCTPS_BOUND,
SCTP_LISTEN, SCTPS_LISTEN,
@@ -3503,19 +3506,6 @@ fi
AC_SUBST(NATIVE_LIBS_ENABLED)
#
-# Check if HiPE should use a standard installation of perfctr.
-#
-AC_SUBST(USE_PERFCTR)
-if test "x$HIPE_ENABLED" = "xyes" ; then
- if test "x$with_perfctr" = "x" ; then
- AC_CHECK_LIB(perfctr, vperfctr_info, [USE_PERFCTR=1
- AC_DEFINE(USE_PERFCTR,[1],[Define to enable hrvtime() on Linux systems with perfctr extension])])
- elif test "x$with_perfctr" != "xno" ; then
- USE_PERFCTR=1
- fi
-fi
-
-#
# Check for working poll().
#
AC_MSG_CHECKING([for working poll()])
@@ -4905,6 +4895,11 @@ LDFLAGS="$LDFLAGS $sanitizers"
])
dnl ----------------------------------------------------------------------
+dnl Check for log2
+dnl ----------------------------------------------------------------------
+AC_CHECK_FUNCS([log2])
+
+dnl ----------------------------------------------------------------------
dnl Output the result.
dnl ----------------------------------------------------------------------