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Viewing changes to js/src/build/autoconf/linux.m4

  • Committer: Package Import Robot
  • Author(s): Rico Tzschichholz
  • Date: 2013-05-25 12:24:23 UTC
  • Revision ID: package-import@ubuntu.com-20130525122423-zmxucrhtensw90xy
Tags: upstream-17.0.0
Import upstream version 17.0.0

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js/src/build/autoconf/linux.m4
 
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dnl This Source Code Form is subject to the terms of the Mozilla Public
 
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dnl License, v. 2.0. If a copy of the MPL was not distributed with this
 
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dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
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AC_DEFUN([MOZ_LINUX_PERF_EVENT],
 
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[
 
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MOZ_ARG_WITH_STRING(linux-headers,
 
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[  --with-linux-headers=DIR
 
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                          location where the Linux kernel headers can be found],
 
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    linux_headers=$withval)
 
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LINUX_HEADERS_INCLUDES=
 
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if test "$linux_headers"; then
 
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    LINUX_HEADERS_INCLUDES="-I$linux_headers"
 
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fi
 
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_SAVE_CFLAGS="$CFLAGS"
 
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CFLAGS="$CFLAGS $LINUX_HEADERS_INCLUDES"
 
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dnl Performance measurement headers.
 
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MOZ_CHECK_HEADER(linux/perf_event.h,
 
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    [AC_CACHE_CHECK(for perf_event_open system call,ac_cv_perf_event_open,
 
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        [AC_TRY_COMPILE([#include <asm/unistd.h>],[return sizeof(__NR_perf_event_open);],
 
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        ac_cv_perf_event_open=yes,
 
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        ac_cv_perf_event_open=no)])])
 
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if test "$ac_cv_perf_event_open" = "yes"; then
 
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    HAVE_LINUX_PERF_EVENT_H=1
 
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else
 
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    HAVE_LINUX_PERF_EVENT_H=
 
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    LINUX_HEADERS_INCLUDES=
 
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fi
 
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AC_SUBST(HAVE_LINUX_PERF_EVENT_H)
 
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AC_SUBST(LINUX_HEADERS_INCLUDES)
 
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CFLAGS="$_SAVE_CFLAGS"
 
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])