Fix: pre-fault TLS in ust-malloc instrumentation

[lttng-ust.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 4ecbff65a633e653cd30f7c1251111a8dfd4826e..4256f6654a321ba3f145855273e8a72ac0303311 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -49,6 +49,7 @@ AC_SUBST([PATCHLEVEL_VERSION], [V_PATCH])
 AC_PROG_SED
 AC_PROG_GREP
 AC_PROG_LN_S
+AC_PROG_MKDIR_P
 
 # libtool link_all_deplibs fixup. See http://bugs.lttng.org/issues/321.
 AC_ARG_ENABLE([libtool-linkdep-fixup], [
@@ -216,19 +217,11 @@ AC_CHECK_LIB([urcu-bp], [call_rcu_bp], [], [AC_MSG_ERROR([liburcu 0.6 or newer i
 # optional linux/perf_event.h
 AC_CHECK_HEADERS([linux/perf_event.h], [have_perf_event=yes], [])
 
-# Perf event counters are only supported on x86 so far.
-AC_MSG_CHECKING([UST support for architecture perf event counters])
-AS_CASE([$host_cpu],
-       [i[[3456]]86], [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=yes],
-       [x86_64], [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=yes],
-       [amd64], [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=yes],
-       [armv7l], [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=yes],
-       [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=no])
-AC_MSG_RESULT([$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS])
-
-AM_CONDITIONAL([HAVE_PERF_EVENT], [test "x$have_perf_event" = "xyes" && test "x$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS" = "xyes"])
+# Perf event counters are supported on all architectures supported by
+# perf, using the read system call as fallback.
+AM_CONDITIONAL([HAVE_PERF_EVENT], [test "x$have_perf_event" = "xyes"])
 
-AS_IF([test "x$have_perf_event" = "xyes" && test "x$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS" = "xyes"], [
+AS_IF([test "x$have_perf_event" = "xyes"], [
        AC_DEFINE([LTTNG_UST_HAVE_PERF_EVENT], [1])
 ])