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40 lines
1.1 KiB
Plaintext
40 lines
1.1 KiB
Plaintext
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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])
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