1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/build/autoconf/linux.m4 Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,39 @@
1.4 +dnl This Source Code Form is subject to the terms of the Mozilla Public
1.5 +dnl License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 +dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
1.7 +
1.8 +AC_DEFUN([MOZ_LINUX_PERF_EVENT],
1.9 +[
1.10 +
1.11 +MOZ_ARG_WITH_STRING(linux-headers,
1.12 +[ --with-linux-headers=DIR
1.13 + location where the Linux kernel headers can be found],
1.14 + linux_headers=$withval)
1.15 +
1.16 +LINUX_HEADERS_INCLUDES=
1.17 +
1.18 +if test "$linux_headers"; then
1.19 + LINUX_HEADERS_INCLUDES="-I$linux_headers"
1.20 +fi
1.21 +
1.22 +_SAVE_CFLAGS="$CFLAGS"
1.23 +CFLAGS="$CFLAGS $LINUX_HEADERS_INCLUDES"
1.24 +
1.25 +dnl Performance measurement headers.
1.26 +MOZ_CHECK_HEADER(linux/perf_event.h,
1.27 + [AC_CACHE_CHECK(for perf_event_open system call,ac_cv_perf_event_open,
1.28 + [AC_TRY_COMPILE([#include <asm/unistd.h>],[return sizeof(__NR_perf_event_open);],
1.29 + ac_cv_perf_event_open=yes,
1.30 + ac_cv_perf_event_open=no)])])
1.31 +if test "$ac_cv_perf_event_open" = "yes"; then
1.32 + HAVE_LINUX_PERF_EVENT_H=1
1.33 +else
1.34 + HAVE_LINUX_PERF_EVENT_H=
1.35 + LINUX_HEADERS_INCLUDES=
1.36 +fi
1.37 +AC_SUBST(HAVE_LINUX_PERF_EVENT_H)
1.38 +AC_SUBST(LINUX_HEADERS_INCLUDES)
1.39 +
1.40 +CFLAGS="$_SAVE_CFLAGS"
1.41 +
1.42 +])
