2021-06-03 08:37:05 +02:00
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# SPDX-License-Identifier: FSFAP
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#
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Use system allocator when jemalloc is unavailable
This commit adds support for systems where the jemalloc library is not
available as a package, here's the quick summary:
* On Linux - the jemalloc is usually available as a package, if
configured --without-jemalloc, the shim would be used around
malloc(), free(), realloc() and malloc_usable_size()
* On macOS - the jemalloc is available from homebrew or macports, if
configured --without-jemalloc, the shim would be used around
malloc(), free(), realloc() and malloc_size()
* On FreeBSD - the jemalloc is *the* system allocator, we just need
to check for <malloc_np.h> header to get access to non-standard API
* On NetBSD - the jemalloc is *the* system allocator, we just need to
check for <jemalloc/jemalloc.h> header to get access to non-standard
API
* On a system hostile to users and developers (read OpenBSD) - the
jemalloc API is emulated by using ((size_t *)ptr)[-1] field to hold
the size information. The OpenBSD developers care only for
themselves, so why should we care about speed on OpenBSD?
2021-05-25 12:46:00 +02:00
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# ===========================================================================
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# https://gitlab.isc.org/isc-projects/autoconf-archive/ax_jemalloc.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_CHECK_JEMALLOC([, ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
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#
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# DESCRIPTION
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#
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# Test for the jemalloc library in a path
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#
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# LICENSE
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#
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# Copyright (c) 2021 Internet Systems Consortium
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 1
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#
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AC_DEFUN([AX_CHECK_JEMALLOC], [
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found=false
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PKG_CHECK_MODULES(
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[JEMALLOC], [jemalloc],
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[
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found=true
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], [
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AC_CHECK_HEADERS([malloc_np.h jemalloc/jemalloc.h],
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[
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save_LIBS="$LIBS"
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save_LDFLAGS="$LDFLAGS"
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save_CPPFLAGS="$CPPFLAGS"
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AC_SEARCH_LIBS([mallocx], [jemalloc],
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[
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found=true
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AS_IF([test "$ac_cv_search_mallocx" != "none required"],
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[JEMALLOC_LIBS="$ac_cv_search_mallocx"])
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])
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CPPFLAGS="$save_CPPFLAGS"
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LDFLAGS="$save_LDFLAGS"
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LIBS="$save_LIBS"
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])
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])
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AS_IF([$found], [$1], [$2])
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AC_SUBST([JEMALLOC_CFLAGS])
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AC_SUBST([JEMALLOC_LIBS])
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])
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