| dnl This Source Code Form is subject to the terms of the Mozilla Public |
| dnl License, v. 2.0. If a copy of the MPL was not distributed with this |
| dnl file, You can obtain one at http://mozilla.org/MPL/2.0/. |
| |
| AC_DEFUN([MOZ_LINUX_PERF_EVENT], |
| [ |
| |
| MOZ_ARG_WITH_STRING(linux-headers, |
| [ --with-linux-headers=DIR |
| location where the Linux kernel headers can be found], |
| linux_headers=$withval) |
| |
| LINUX_HEADERS_INCLUDES= |
| |
| if test "$linux_headers"; then |
| LINUX_HEADERS_INCLUDES="-I$linux_headers" |
| fi |
| |
| _SAVE_CFLAGS="$CFLAGS" |
| CFLAGS="$CFLAGS $LINUX_HEADERS_INCLUDES" |
| |
| dnl Performance measurement headers. |
| MOZ_CHECK_HEADER(linux/perf_event.h, |
| [AC_CACHE_CHECK(for perf_event_open system call,ac_cv_perf_event_open, |
| [AC_TRY_COMPILE([#include <asm/unistd.h>],[return sizeof(__NR_perf_event_open);], |
| ac_cv_perf_event_open=yes, |
| ac_cv_perf_event_open=no)])]) |
| if test "$ac_cv_perf_event_open" = "yes"; then |
| HAVE_LINUX_PERF_EVENT_H=1 |
| else |
| HAVE_LINUX_PERF_EVENT_H= |
| LINUX_HEADERS_INCLUDES= |
| fi |
| AC_SUBST(HAVE_LINUX_PERF_EVENT_H) |
| AC_SUBST(LINUX_HEADERS_INCLUDES) |
| |
| CFLAGS="$_SAVE_CFLAGS" |
| |
| ]) |
