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comparison: build/autoconf/linux.m4
build/autoconf/linux.m4
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| -1:000000000000 | 0:716239b1ca08 |
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| 1 dnl This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 dnl License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 dnl file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
| 4 | |
| 5 AC_DEFUN([MOZ_LINUX_PERF_EVENT], | |
| 6 [ | |
| 7 | |
| 8 MOZ_ARG_WITH_STRING(linux-headers, | |
| 9 [ --with-linux-headers=DIR | |
| 10 location where the Linux kernel headers can be found], | |
| 11 linux_headers=$withval) | |
| 12 | |
| 13 LINUX_HEADERS_INCLUDES= | |
| 14 | |
| 15 if test "$linux_headers"; then | |
| 16 LINUX_HEADERS_INCLUDES="-I$linux_headers" | |
| 17 fi | |
| 18 | |
| 19 _SAVE_CFLAGS="$CFLAGS" | |
| 20 CFLAGS="$CFLAGS $LINUX_HEADERS_INCLUDES" | |
| 21 | |
| 22 dnl Performance measurement headers. | |
| 23 MOZ_CHECK_HEADER(linux/perf_event.h, | |
| 24 [AC_CACHE_CHECK(for perf_event_open system call,ac_cv_perf_event_open, | |
| 25 [AC_TRY_COMPILE([#include <asm/unistd.h>],[return sizeof(__NR_perf_event_open);], | |
| 26 ac_cv_perf_event_open=yes, | |
| 27 ac_cv_perf_event_open=no)])]) | |
| 28 if test "$ac_cv_perf_event_open" = "yes"; then | |
| 29 HAVE_LINUX_PERF_EVENT_H=1 | |
| 30 else | |
| 31 HAVE_LINUX_PERF_EVENT_H= | |
| 32 LINUX_HEADERS_INCLUDES= | |
| 33 fi | |
| 34 AC_SUBST(HAVE_LINUX_PERF_EVENT_H) | |
| 35 AC_SUBST(LINUX_HEADERS_INCLUDES) | |
| 36 | |
| 37 CFLAGS="$_SAVE_CFLAGS" | |
| 38 | |
| 39 ]) |
