The Tor Browser: memory/jemalloc/src/configure.ac@6474c204b198 (annotated)

memory/jemalloc/src/configure.ac@6474c204b198 (annotated)

memory/jemalloc/src/configure.ac

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 dnl Process this file with autoconf to produce a configure script.
 AC_INIT([Makefile.in])
 dnl ============================================================================
 dnl Custom macro definitions.
 dnl JE_CFLAGS_APPEND(cflag)
 AC_DEFUN([JE_CFLAGS_APPEND],
 [
 AC_MSG_CHECKING([whether compiler supports $1])
 TCFLAGS="${CFLAGS}"
 if test "x${CFLAGS}" = "x" ; then
   CFLAGS="$1"
 else
   CFLAGS="${CFLAGS} $1"
 fi
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 [[
 ]], [[
     return 0;
 ]])],
               AC_MSG_RESULT([yes]),
               AC_MSG_RESULT([no])
               [CFLAGS="${TCFLAGS}"]
 )
 ])
 dnl JE_COMPILABLE(label, hcode, mcode, rvar)
 dnl
 dnl Use AC_LINK_IFELSE() rather than AC_COMPILE_IFELSE() so that linker errors
 dnl cause failure.
 AC_DEFUN([JE_COMPILABLE],
 [
 AC_CACHE_CHECK([whether $1 is compilable],
                [$4],
                [AC_LINK_IFELSE([AC_LANG_PROGRAM([$2],
                                                 [$3])],
                                [$4=yes],
                                [$4=no])])
 ])
 dnl ============================================================================
 dnl Library revision.
 rev=1
 AC_SUBST([rev])
 srcroot=$srcdir
 if test "x${srcroot}" = "x." ; then
   srcroot=""
 else
   srcroot="${srcroot}/"
 fi
 AC_SUBST([srcroot])
 abs_srcroot="`cd \"${srcdir}\"; pwd`/"
 AC_SUBST([abs_srcroot])
 objroot=""
 AC_SUBST([objroot])
 abs_objroot="`pwd`/"
 AC_SUBST([abs_objroot])
 dnl Munge install path variables.
 if test "x$prefix" = "xNONE" ; then
   prefix="/usr/local"
 fi
 if test "x$exec_prefix" = "xNONE" ; then
   exec_prefix=$prefix
 fi
 PREFIX=$prefix
 AC_SUBST([PREFIX])
 BINDIR=`eval echo $bindir`
 BINDIR=`eval echo $BINDIR`
 AC_SUBST([BINDIR])
 INCLUDEDIR=`eval echo $includedir`
 INCLUDEDIR=`eval echo $INCLUDEDIR`
 AC_SUBST([INCLUDEDIR])
 LIBDIR=`eval echo $libdir`
 LIBDIR=`eval echo $LIBDIR`
 AC_SUBST([LIBDIR])
 DATADIR=`eval echo $datadir`
 DATADIR=`eval echo $DATADIR`
 AC_SUBST([DATADIR])
 MANDIR=`eval echo $mandir`
 MANDIR=`eval echo $MANDIR`
 AC_SUBST([MANDIR])
 dnl Support for building documentation.
 AC_PATH_PROG([XSLTPROC], [xsltproc], , [$PATH])
 if test -d "/usr/share/xml/docbook/stylesheet/docbook-xsl" ; then
   DEFAULT_XSLROOT="/usr/share/xml/docbook/stylesheet/docbook-xsl"
 elif test -d "/usr/share/sgml/docbook/xsl-stylesheets" ; then
   DEFAULT_XSLROOT="/usr/share/sgml/docbook/xsl-stylesheets"
 else
   dnl Documentation building will fail if this default gets used.
   DEFAULT_XSLROOT=""
 fi
 AC_ARG_WITH([xslroot],
   [AS_HELP_STRING([--with-xslroot=<path>], [XSL stylesheet root path])], [
 if test "x$with_xslroot" = "xno" ; then
   XSLROOT="${DEFAULT_XSLROOT}"
 else
   XSLROOT="${with_xslroot}"
 fi
 ],
   XSLROOT="${DEFAULT_XSLROOT}"
 )
 AC_SUBST([XSLROOT])
 dnl If CFLAGS isn't defined, set CFLAGS to something reasonable.  Otherwise,
 dnl just prevent autoconf from molesting CFLAGS.
 CFLAGS=$CFLAGS
 AC_PROG_CC
 if test "x$GCC" != "xyes" ; then
   AC_CACHE_CHECK([whether compiler is MSVC],
                  [je_cv_msvc],
                  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
                                                      [
 #ifndef _MSC_VER
   int fail[-1];
 #endif
 ])],
                                [je_cv_msvc=yes],
                                [je_cv_msvc=no])])
 fi
 if test "x$CFLAGS" = "x" ; then
   no_CFLAGS="yes"
   if test "x$GCC" = "xyes" ; then
     JE_CFLAGS_APPEND([-std=gnu99])
     JE_CFLAGS_APPEND([-Wall])
     JE_CFLAGS_APPEND([-pipe])
     JE_CFLAGS_APPEND([-g3])
   elif test "x$je_cv_msvc" = "xyes" ; then
     CC="$CC -nologo"
     JE_CFLAGS_APPEND([-Zi])
     JE_CFLAGS_APPEND([-MT])
     JE_CFLAGS_APPEND([-W3])
     CPPFLAGS="$CPPFLAGS -I${srcroot}/include/msvc_compat"
   fi
 fi
 dnl Append EXTRA_CFLAGS to CFLAGS, if defined.
 if test "x$EXTRA_CFLAGS" != "x" ; then
   JE_CFLAGS_APPEND([$EXTRA_CFLAGS])
 fi
 AC_PROG_CPP
 AC_CHECK_SIZEOF([void *])
 if test "x${ac_cv_sizeof_void_p}" = "x8" ; then
   LG_SIZEOF_PTR=3
 elif test "x${ac_cv_sizeof_void_p}" = "x4" ; then
   LG_SIZEOF_PTR=2
 else
   AC_MSG_ERROR([Unsupported pointer size: ${ac_cv_sizeof_void_p}])
 fi
 AC_DEFINE_UNQUOTED([LG_SIZEOF_PTR], [$LG_SIZEOF_PTR])
 AC_CHECK_SIZEOF([int])
 if test "x${ac_cv_sizeof_int}" = "x8" ; then
   LG_SIZEOF_INT=3
 elif test "x${ac_cv_sizeof_int}" = "x4" ; then
   LG_SIZEOF_INT=2
 else
   AC_MSG_ERROR([Unsupported int size: ${ac_cv_sizeof_int}])
 fi
 AC_DEFINE_UNQUOTED([LG_SIZEOF_INT], [$LG_SIZEOF_INT])
 AC_CHECK_SIZEOF([long])
 if test "x${ac_cv_sizeof_long}" = "x8" ; then
   LG_SIZEOF_LONG=3
 elif test "x${ac_cv_sizeof_long}" = "x4" ; then
   LG_SIZEOF_LONG=2
 else
   AC_MSG_ERROR([Unsupported long size: ${ac_cv_sizeof_long}])
 fi
 AC_DEFINE_UNQUOTED([LG_SIZEOF_LONG], [$LG_SIZEOF_LONG])
 AC_CHECK_SIZEOF([intmax_t])
 if test "x${ac_cv_sizeof_intmax_t}" = "x16" ; then
   LG_SIZEOF_INTMAX_T=4
 elif test "x${ac_cv_sizeof_intmax_t}" = "x8" ; then
   LG_SIZEOF_INTMAX_T=3
 elif test "x${ac_cv_sizeof_intmax_t}" = "x4" ; then
   LG_SIZEOF_INTMAX_T=2
 else
   AC_MSG_ERROR([Unsupported intmax_t size: ${ac_cv_sizeof_intmax_t}])
 fi
 AC_DEFINE_UNQUOTED([LG_SIZEOF_INTMAX_T], [$LG_SIZEOF_INTMAX_T])
 AC_CANONICAL_HOST
 dnl CPU-specific settings.
 CPU_SPINWAIT=""
 case "${host_cpu}" in
   i[[345]]86)
 	;;
   i686)
 	JE_COMPILABLE([__asm__], [], [[__asm__ volatile("pause"); return 0;]],
 	              [je_cv_asm])
 	if test "x${je_cv_asm}" = "xyes" ; then
 	    CPU_SPINWAIT='__asm__ volatile("pause")'
 	fi
 	;;
   x86_64)
 	JE_COMPILABLE([__asm__ syntax], [],
 	              [[__asm__ volatile("pause"); return 0;]], [je_cv_asm])
 	if test "x${je_cv_asm}" = "xyes" ; then
 	    CPU_SPINWAIT='__asm__ volatile("pause")'
 	fi
 	;;
   *)
 	;;
 esac
 AC_DEFINE_UNQUOTED([CPU_SPINWAIT], [$CPU_SPINWAIT])
 LD_PRELOAD_VAR="LD_PRELOAD"
 so="so"
 importlib="${so}"
 o="$ac_objext"
 a="a"
 exe="$ac_exeext"
 libprefix="lib"
 DSO_LDFLAGS='-shared -Wl,-soname,$(@F)'
 RPATH='-Wl,-rpath,$(1)'
 SOREV="${so}.${rev}"
 PIC_CFLAGS='-fPIC -DPIC'
 CTARGET='-o $@'
 LDTARGET='-o $@'
 EXTRA_LDFLAGS=
 MKLIB='ar crus $@'
 CC_MM=1
 dnl Platform-specific settings.  abi and RPATH can probably be determined
 dnl programmatically, but doing so is error-prone, which makes it generally
 dnl not worth the trouble.
 dnl
 dnl Define cpp macros in CPPFLAGS, rather than doing AC_DEFINE(macro), since the
 dnl definitions need to be seen before any headers are included, which is a pain
 dnl to make happen otherwise.
 default_munmap="1"
 JEMALLOC_USABLE_SIZE_CONST="const"
 case "${host}" in
   *-*-darwin*)
 	CFLAGS="$CFLAGS"
 	abi="macho"
 	AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
 	RPATH=""
 	LD_PRELOAD_VAR="DYLD_INSERT_LIBRARIES"
 	so="dylib"
 	importlib="${so}"
 	force_tls="0"
 	DSO_LDFLAGS='-shared -Wl,-dylib_install_name,$(@F)'
 	SOREV="${rev}.${so}"
 	;;
   *-*-freebsd*)
 	CFLAGS="$CFLAGS"
 	abi="elf"
 	AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
 	force_lazy_lock="1"
 	;;
   *-*-linux*)
 	CFLAGS="$CFLAGS"
 	CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
 	abi="elf"
 	AC_DEFINE([JEMALLOC_PURGE_MADVISE_DONTNEED], [ ])
 	AC_DEFINE([JEMALLOC_THREADED_INIT], [ ])
 	JEMALLOC_USABLE_SIZE_CONST=""
 	default_munmap="0"
 	;;
   *-*-netbsd*)
 	AC_MSG_CHECKING([ABI])
         AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 [[#ifdef __ELF__
 /* ELF */
 #else
 #error aout
 #endif
 ]])],
                           [CFLAGS="$CFLAGS"; abi="elf"],
                           [abi="aout"])
 	AC_MSG_RESULT([$abi])
 	AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
 	;;
   *-*-solaris2*)
 	CFLAGS="$CFLAGS"
 	abi="elf"
 	RPATH='-Wl,-R,$(1)'
 	dnl Solaris needs this for sigwait().
 	CPPFLAGS="$CPPFLAGS -D_POSIX_PTHREAD_SEMANTICS"
 	LIBS="$LIBS -lposix4 -lsocket -lnsl"
 	;;
   *-ibm-aix*)
 	if "$LG_SIZEOF_PTR" = "8"; then
 	  dnl 64bit AIX
 	  LD_PRELOAD_VAR="LDR_PRELOAD64"
 	else
 	  dnl 32bit AIX
 	  LD_PRELOAD_VAR="LDR_PRELOAD"
 	fi
 	abi="xcoff"
 	;;
   *-*-mingw*)
 	abi="pecoff"
 	force_tls="0"
 	RPATH=""
 	so="dll"
 	if test "x$je_cv_msvc" = "xyes" ; then
 	  importlib="lib"
 	  DSO_LDFLAGS="-LD"
 	  EXTRA_LDFLAGS="-link -DEBUG"
 	  CTARGET='-Fo$@'
 	  LDTARGET='-Fe$@'
 	  MKLIB='lib -nologo -out:$@'
 	  CC_MM=
         else
 	  importlib="${so}"
 	  DSO_LDFLAGS="-shared"
 	fi
 	a="lib"
 	libprefix=""
 	SOREV="${so}"
 	PIC_CFLAGS=""
 	;;
   *)
 	AC_MSG_RESULT([Unsupported operating system: ${host}])
 	abi="elf"
 	;;
 esac
 AC_DEFINE_UNQUOTED([JEMALLOC_USABLE_SIZE_CONST], [$JEMALLOC_USABLE_SIZE_CONST])
 AC_SUBST([abi])
 AC_SUBST([RPATH])
 AC_SUBST([LD_PRELOAD_VAR])
 AC_SUBST([so])
 AC_SUBST([importlib])
 AC_SUBST([o])
 AC_SUBST([a])
 AC_SUBST([exe])
 AC_SUBST([libprefix])
 AC_SUBST([DSO_LDFLAGS])
 AC_SUBST([EXTRA_LDFLAGS])
 AC_SUBST([SOREV])
 AC_SUBST([PIC_CFLAGS])
 AC_SUBST([CTARGET])
 AC_SUBST([LDTARGET])
 AC_SUBST([MKLIB])
 AC_SUBST([CC_MM])
 if test "x$abi" != "xpecoff"; then
   dnl Heap profiling uses the log(3) function.
   LIBS="$LIBS -lm"
 fi
 JE_COMPILABLE([__attribute__ syntax],
               [static __attribute__((unused)) void foo(void){}],
               [],
               [je_cv_attribute])
 if test "x${je_cv_attribute}" = "xyes" ; then
   AC_DEFINE([JEMALLOC_HAVE_ATTR], [ ])
   if test "x${GCC}" = "xyes" -a "x${abi}" = "xelf"; then
     JE_CFLAGS_APPEND([-fvisibility=hidden])
   fi
 fi
 dnl Check for tls_model attribute support (clang 3.0 still lacks support).
 SAVED_CFLAGS="${CFLAGS}"
 JE_CFLAGS_APPEND([-Werror])
 JE_COMPILABLE([tls_model attribute], [],
               [static __thread int
                __attribute__((tls_model("initial-exec"))) foo;
                foo = 0;],
               [je_cv_tls_model])
 CFLAGS="${SAVED_CFLAGS}"
 if test "x${je_cv_tls_model}" = "xyes" ; then
   AC_DEFINE([JEMALLOC_TLS_MODEL],
             [__attribute__((tls_model("initial-exec")))])
 else
   AC_DEFINE([JEMALLOC_TLS_MODEL], [ ])
 fi
 dnl Support optional additions to rpath.
 AC_ARG_WITH([rpath],
   [AS_HELP_STRING([--with-rpath=<rpath>], [Colon-separated rpath (ELF systems only)])],
 if test "x$with_rpath" = "xno" ; then
   RPATH_EXTRA=
 else
   RPATH_EXTRA="`echo $with_rpath | tr \":\" \" \"`"
 fi,
   RPATH_EXTRA=
 )
 AC_SUBST([RPATH_EXTRA])
 dnl Disable rules that do automatic regeneration of configure output by default.
 AC_ARG_ENABLE([autogen],
   [AS_HELP_STRING([--enable-autogen], [Automatically regenerate configure output])],
 if test "x$enable_autogen" = "xno" ; then
   enable_autogen="0"
 else
   enable_autogen="1"
 fi
 ,
 enable_autogen="0"
 )
 AC_SUBST([enable_autogen])
 AC_PROG_INSTALL
 AC_PROG_RANLIB
 AC_PATH_PROG([AR], [ar], , [$PATH])
 AC_PATH_PROG([LD], [ld], , [$PATH])
 AC_PATH_PROG([AUTOCONF], [autoconf], , [$PATH])
 public_syms="malloc_conf malloc_message malloc calloc posix_memalign aligned_alloc realloc free malloc_usable_size malloc_stats_print mallctl mallctlnametomib mallctlbymib"
 dnl Check for allocator-related functions that should be wrapped.
 AC_CHECK_FUNC([memalign],
 	      [AC_DEFINE([JEMALLOC_OVERRIDE_MEMALIGN], [ ])
 	       public_syms="${public_syms} memalign"])
 AC_CHECK_FUNC([valloc],
 	      [AC_DEFINE([JEMALLOC_OVERRIDE_VALLOC], [ ])
 	       public_syms="${public_syms} valloc"])
 dnl Support the experimental API by default.
 AC_ARG_ENABLE([experimental],
   [AS_HELP_STRING([--disable-experimental],
    [Disable support for the experimental API])],
 [if test "x$enable_experimental" = "xno" ; then
   enable_experimental="0"
 else
   enable_experimental="1"
 fi
 ],
 [enable_experimental="1"]
 )
 if test "x$enable_experimental" = "x1" ; then
   AC_DEFINE([JEMALLOC_EXPERIMENTAL], [ ])
   public_syms="${public_syms} allocm dallocm nallocm rallocm sallocm"
 fi
 AC_SUBST([enable_experimental])
 dnl Perform no name mangling by default.
 AC_ARG_WITH([mangling],
   [AS_HELP_STRING([--with-mangling=<map>], [Mangle symbols in <map>])],
   [mangling_map="$with_mangling"], [mangling_map=""])
 for nm in `echo ${mangling_map} |tr ',' ' '` ; do
   k="`echo ${nm} |tr ':' ' ' |awk '{print $1}'`"
   n="je_${k}"
   m=`echo ${nm} |tr ':' ' ' |awk '{print $2}'`
   AC_DEFINE_UNQUOTED([${n}], [${m}])
   dnl Remove key from public_syms so that it isn't redefined later.
   public_syms=`for sym in ${public_syms}; do echo "${sym}"; done |grep -v "^${k}\$" |tr '\n' ' '`
 done
 dnl Do not prefix public APIs by default.
 AC_ARG_WITH([jemalloc_prefix],
   [AS_HELP_STRING([--with-jemalloc-prefix=<prefix>], [Prefix to prepend to all public APIs])],
   [JEMALLOC_PREFIX="$with_jemalloc_prefix"],
   [if test "x$abi" != "xmacho" -a "x$abi" != "xpecoff"; then
   JEMALLOC_PREFIX=""
 else
   JEMALLOC_PREFIX="je_"
 fi]
 )
 if test "x$JEMALLOC_PREFIX" != "x" ; then
   JEMALLOC_CPREFIX=`echo ${JEMALLOC_PREFIX} | tr "a-z" "A-Z"`
   AC_DEFINE_UNQUOTED([JEMALLOC_PREFIX], ["$JEMALLOC_PREFIX"])
   AC_DEFINE_UNQUOTED([JEMALLOC_CPREFIX], ["$JEMALLOC_CPREFIX"])
 fi
 dnl Generate macros to rename public symbols.  All public symbols are prefixed
 dnl with je_ in the source code, so these macro definitions are needed even if
 dnl --with-jemalloc-prefix wasn't specified.
 for stem in ${public_syms}; do
   n="je_${stem}"
   m="${JEMALLOC_PREFIX}${stem}"
   AC_DEFINE_UNQUOTED([${n}], [${m}])
 done
 AC_ARG_WITH([export],
   [AS_HELP_STRING([--without-export], [disable exporting jemalloc public APIs])],
   [if test "x$with_export" = "xno"; then
   AC_DEFINE([JEMALLOC_EXPORT],[])]
 fi]
 )
 dnl Do not mangle library-private APIs by default.
 AC_ARG_WITH([private_namespace],
   [AS_HELP_STRING([--with-private-namespace=<prefix>], [Prefix to prepend to all library-private APIs])],
   [JEMALLOC_PRIVATE_NAMESPACE="$with_private_namespace"],
   [JEMALLOC_PRIVATE_NAMESPACE=""]
 )
 AC_DEFINE_UNQUOTED([JEMALLOC_PRIVATE_NAMESPACE], ["$JEMALLOC_PRIVATE_NAMESPACE"])
 if test "x$JEMALLOC_PRIVATE_NAMESPACE" != "x" ; then
   AC_DEFINE_UNQUOTED([JEMALLOC_N(string_that_no_one_should_want_to_use_as_a_jemalloc_private_namespace_prefix)], [${JEMALLOC_PRIVATE_NAMESPACE}##string_that_no_one_should_want_to_use_as_a_jemalloc_private_namespace_prefix])
 else
   AC_DEFINE_UNQUOTED([JEMALLOC_N(string_that_no_one_should_want_to_use_as_a_jemalloc_private_namespace_prefix)], [string_that_no_one_should_want_to_use_as_a_jemalloc_private_namespace_prefix])
 fi
 dnl Do not add suffix to installed files by default.
 AC_ARG_WITH([install_suffix],
   [AS_HELP_STRING([--with-install-suffix=<suffix>], [Suffix to append to all installed files])],
   [INSTALL_SUFFIX="$with_install_suffix"],
   [INSTALL_SUFFIX=]
 )
 install_suffix="$INSTALL_SUFFIX"
 AC_SUBST([install_suffix])
 cfgoutputs_in="${srcroot}Makefile.in"
 cfgoutputs_in="${cfgoutputs_in} ${srcroot}doc/html.xsl.in"
 cfgoutputs_in="${cfgoutputs_in} ${srcroot}doc/manpages.xsl.in"
 cfgoutputs_in="${cfgoutputs_in} ${srcroot}doc/jemalloc.xml.in"
 cfgoutputs_in="${cfgoutputs_in} ${srcroot}include/jemalloc/jemalloc.h.in"
 cfgoutputs_in="${cfgoutputs_in} ${srcroot}include/jemalloc/internal/jemalloc_internal.h.in"
 cfgoutputs_in="${cfgoutputs_in} ${srcroot}test/jemalloc_test.h.in"
 cfgoutputs_out="Makefile"
 cfgoutputs_out="${cfgoutputs_out} doc/html.xsl"
 cfgoutputs_out="${cfgoutputs_out} doc/manpages.xsl"
 cfgoutputs_out="${cfgoutputs_out} doc/jemalloc${install_suffix}.xml"
 cfgoutputs_out="${cfgoutputs_out} include/jemalloc/jemalloc${install_suffix}.h"
 cfgoutputs_out="${cfgoutputs_out} include/jemalloc/internal/jemalloc_internal.h"
 cfgoutputs_out="${cfgoutputs_out} test/jemalloc_test.h"
 cfgoutputs_tup="Makefile"
 cfgoutputs_tup="${cfgoutputs_tup} doc/html.xsl:doc/html.xsl.in"
 cfgoutputs_tup="${cfgoutputs_tup} doc/manpages.xsl:doc/manpages.xsl.in"
 cfgoutputs_tup="${cfgoutputs_tup} doc/jemalloc${install_suffix}.xml:doc/jemalloc.xml.in"
 cfgoutputs_tup="${cfgoutputs_tup} include/jemalloc/jemalloc${install_suffix}.h:include/jemalloc/jemalloc.h.in"
 cfgoutputs_tup="${cfgoutputs_tup} include/jemalloc/internal/jemalloc_internal.h"
 cfgoutputs_tup="${cfgoutputs_tup} test/jemalloc_test.h:test/jemalloc_test.h.in"
 cfghdrs_in="${srcroot}include/jemalloc/jemalloc_defs.h.in"
 cfghdrs_in="${cfghdrs_in} ${srcroot}include/jemalloc/internal/size_classes.sh"
 cfghdrs_out="include/jemalloc/jemalloc_defs${install_suffix}.h"
 cfghdrs_out="${cfghdrs_out} include/jemalloc/internal/size_classes.h"
 cfghdrs_tup="include/jemalloc/jemalloc_defs${install_suffix}.h:include/jemalloc/jemalloc_defs.h.in"
 dnl Do not silence irrelevant compiler warnings by default, since enabling this
 dnl option incurs a performance penalty.
 AC_ARG_ENABLE([cc-silence],
   [AS_HELP_STRING([--enable-cc-silence],
                   [Silence irrelevant compiler warnings])],
 [if test "x$enable_cc_silence" = "xno" ; then
   enable_cc_silence="0"
 else
   enable_cc_silence="1"
 fi
 ],
 [enable_cc_silence="0"]
 )
 if test "x$enable_cc_silence" = "x1" ; then
   AC_DEFINE([JEMALLOC_CC_SILENCE], [ ])
 fi
 dnl Do not compile with debugging by default.
 AC_ARG_ENABLE([debug],
   [AS_HELP_STRING([--enable-debug], [Build debugging code])],
 [if test "x$enable_debug" = "xno" ; then
   enable_debug="0"
 else
   enable_debug="1"
 fi
 ],
 [enable_debug="0"]
 )
 if test "x$enable_debug" = "x1" ; then
   AC_DEFINE([JEMALLOC_DEBUG], [ ])
   AC_DEFINE([JEMALLOC_IVSALLOC], [ ])
 fi
 AC_SUBST([enable_debug])
 dnl Only optimize if not debugging.
 if test "x$enable_debug" = "x0" -a "x$no_CFLAGS" = "xyes" ; then
   dnl Make sure that an optimization flag was not specified in EXTRA_CFLAGS.
   optimize="no"
   echo "$EXTRA_CFLAGS" | grep "\-O" >/dev/null || optimize="yes"
   if test "x${optimize}" = "xyes" ; then
     if test "x$GCC" = "xyes" ; then
       JE_CFLAGS_APPEND([-O3])
       JE_CFLAGS_APPEND([-funroll-loops])
     elif test "x$je_cv_msvc" = "xyes" ; then
       JE_CFLAGS_APPEND([-O2])
     else
       JE_CFLAGS_APPEND([-O])
     fi
   fi
 fi
 dnl Enable statistics calculation by default.
 AC_ARG_ENABLE([stats],
   [AS_HELP_STRING([--disable-stats],
                   [Disable statistics calculation/reporting])],
 [if test "x$enable_stats" = "xno" ; then
   enable_stats="0"
 else
   enable_stats="1"
 fi
 ],
 [enable_stats="1"]
 )
 if test "x$enable_stats" = "x1" ; then
   AC_DEFINE([JEMALLOC_STATS], [ ])
 fi
 AC_SUBST([enable_stats])
 dnl Do not enable profiling by default.
 AC_ARG_ENABLE([prof],
   [AS_HELP_STRING([--enable-prof], [Enable allocation profiling])],
 [if test "x$enable_prof" = "xno" ; then
   enable_prof="0"
 else
   enable_prof="1"
 fi
 ],
 [enable_prof="0"]
 )
 if test "x$enable_prof" = "x1" ; then
   backtrace_method=""
 else
   backtrace_method="N/A"
 fi
 AC_ARG_ENABLE([prof-libunwind],
   [AS_HELP_STRING([--enable-prof-libunwind], [Use libunwind for backtracing])],
 [if test "x$enable_prof_libunwind" = "xno" ; then
   enable_prof_libunwind="0"
 else
   enable_prof_libunwind="1"
 fi
 ],
 [enable_prof_libunwind="0"]
 )
 AC_ARG_WITH([static_libunwind],
   [AS_HELP_STRING([--with-static-libunwind=<libunwind.a>],
   [Path to static libunwind library; use rather than dynamically linking])],
 if test "x$with_static_libunwind" = "xno" ; then
   LUNWIND="-lunwind"
 else
   if test ! -f "$with_static_libunwind" ; then
     AC_MSG_ERROR([Static libunwind not found: $with_static_libunwind])
   fi
   LUNWIND="$with_static_libunwind"
 fi,
   LUNWIND="-lunwind"
 )
 if test "x$backtrace_method" = "x" -a "x$enable_prof_libunwind" = "x1" ; then
   AC_CHECK_HEADERS([libunwind.h], , [enable_prof_libunwind="0"])
   if test "x$LUNWIND" = "x-lunwind" ; then
     AC_CHECK_LIB([unwind], [backtrace], [LIBS="$LIBS $LUNWIND"],
                  [enable_prof_libunwind="0"])
   else
     LIBS="$LIBS $LUNWIND"
   fi
   if test "x${enable_prof_libunwind}" = "x1" ; then
     backtrace_method="libunwind"
     AC_DEFINE([JEMALLOC_PROF_LIBUNWIND], [ ])
   fi
 fi
 AC_ARG_ENABLE([prof-libgcc],
   [AS_HELP_STRING([--disable-prof-libgcc],
   [Do not use libgcc for backtracing])],
 [if test "x$enable_prof_libgcc" = "xno" ; then
   enable_prof_libgcc="0"
 else
   enable_prof_libgcc="1"
 fi
 ],
 [enable_prof_libgcc="1"]
 )
 if test "x$backtrace_method" = "x" -a "x$enable_prof_libgcc" = "x1" \
      -a "x$GCC" = "xyes" ; then
   AC_CHECK_HEADERS([unwind.h], , [enable_prof_libgcc="0"])
   AC_CHECK_LIB([gcc], [_Unwind_Backtrace], [LIBS="$LIBS -lgcc"], [enable_prof_libgcc="0"])
   dnl The following is conservative, in that it only has entries for CPUs on
   dnl which jemalloc has been tested.
   AC_MSG_CHECKING([libgcc-based backtracing reliability on ${host_cpu}])
   case "${host_cpu}" in
     i[[3456]]86)
       AC_MSG_RESULT([unreliable])
       enable_prof_libgcc="0";
       ;;
     x86_64)
       AC_MSG_RESULT([reliable])
       ;;
     *)
       AC_MSG_RESULT([unreliable])
       enable_prof_libgcc="0";
       ;;
   esac
   if test "x${enable_prof_libgcc}" = "x1" ; then
     backtrace_method="libgcc"
     AC_DEFINE([JEMALLOC_PROF_LIBGCC], [ ])
   fi
 else
   enable_prof_libgcc="0"
 fi
 AC_ARG_ENABLE([prof-gcc],
   [AS_HELP_STRING([--disable-prof-gcc],
   [Do not use gcc intrinsics for backtracing])],
 [if test "x$enable_prof_gcc" = "xno" ; then
   enable_prof_gcc="0"
 else
   enable_prof_gcc="1"
 fi
 ],
 [enable_prof_gcc="1"]
 )
 if test "x$backtrace_method" = "x" -a "x$enable_prof_gcc" = "x1" \
      -a "x$GCC" = "xyes" ; then
   backtrace_method="gcc intrinsics"
   AC_DEFINE([JEMALLOC_PROF_GCC], [ ])
 else
   enable_prof_gcc="0"
 fi
 if test "x$backtrace_method" = "x" ; then
   backtrace_method="none (disabling profiling)"
   enable_prof="0"
 fi
 AC_MSG_CHECKING([configured backtracing method])
 AC_MSG_RESULT([$backtrace_method])
 if test "x$enable_prof" = "x1" ; then
   if test "x${force_tls}" = "x0" ; then
     AC_MSG_ERROR([Heap profiling requires TLS]);
   fi
   force_tls="1"
   AC_DEFINE([JEMALLOC_PROF], [ ])
 fi
 AC_SUBST([enable_prof])
 dnl Enable thread-specific caching by default.
 AC_ARG_ENABLE([tcache],
   [AS_HELP_STRING([--disable-tcache], [Disable per thread caches])],
 [if test "x$enable_tcache" = "xno" ; then
   enable_tcache="0"
 else
   enable_tcache="1"
 fi
 ],
 [enable_tcache="1"]
 )
 if test "x$enable_tcache" = "x1" ; then
   AC_DEFINE([JEMALLOC_TCACHE], [ ])
 fi
 AC_SUBST([enable_tcache])
 dnl Disable mremap() for huge realloc() by default.
 AC_ARG_ENABLE([mremap],
   [AS_HELP_STRING([--enable-mremap], [Enable mremap(2) for huge realloc()])],
 [if test "x$enable_mremap" = "xno" ; then
   enable_mremap="0"
 else
   enable_mremap="1"
 fi
 ],
 [enable_mremap="0"]
 )
 if test "x$enable_mremap" = "x1" ; then
   JE_COMPILABLE([mremap(...MREMAP_FIXED...)], [
 #define _GNU_SOURCE
 #include <sys/mman.h>
 ], [
 void *p = mremap((void *)0, 0, 0, MREMAP_MAYMOVE|MREMAP_FIXED, (void *)0);
 ], [je_cv_mremap_fixed])
   if test "x${je_cv_mremap_fixed}" = "xno" ; then
     enable_mremap="0"
   fi
 fi
 if test "x$enable_mremap" = "x1" ; then
   AC_DEFINE([JEMALLOC_MREMAP], [ ])
 fi
 AC_SUBST([enable_mremap])
 dnl Enable VM deallocation via munmap() by default.
 AC_ARG_ENABLE([munmap],
   [AS_HELP_STRING([--disable-munmap], [Disable VM deallocation via munmap(2)])],
 [if test "x$enable_munmap" = "xno" ; then
   enable_munmap="0"
 else
   enable_munmap="1"
 fi
 ],
 [enable_munmap="${default_munmap}"]
 )
 if test "x$enable_munmap" = "x1" ; then
   AC_DEFINE([JEMALLOC_MUNMAP], [ ])
 fi
 AC_SUBST([enable_munmap])
 dnl Do not enable allocation from DSS by default.
 AC_ARG_ENABLE([dss],
   [AS_HELP_STRING([--enable-dss], [Enable allocation from DSS])],
 [if test "x$enable_dss" = "xno" ; then
   enable_dss="0"
 else
   enable_dss="1"
 fi
 ],
 [enable_dss="0"]
 )
 dnl Check whether the BSD/SUSv1 sbrk() exists.  If not, disable DSS support.
 AC_CHECK_FUNC([sbrk], [have_sbrk="1"], [have_sbrk="0"])
 if test "x$have_sbrk" = "x1" ; then
   AC_DEFINE([JEMALLOC_HAVE_SBRK], [ ])
 else
   enable_dss="0"
 fi
 if test "x$enable_dss" = "x1" ; then
   AC_DEFINE([JEMALLOC_DSS], [ ])
 fi
 AC_SUBST([enable_dss])
 dnl Support the junk/zero filling option by default.
 AC_ARG_ENABLE([fill],
   [AS_HELP_STRING([--disable-fill],
                   [Disable support for junk/zero filling, quarantine, and redzones])],
 [if test "x$enable_fill" = "xno" ; then
   enable_fill="0"
 else
   enable_fill="1"
 fi
 ],
 [enable_fill="1"]
 )
 if test "x$enable_fill" = "x1" ; then
   AC_DEFINE([JEMALLOC_FILL], [ ])
 fi
 AC_SUBST([enable_fill])
 dnl Disable utrace(2)-based tracing by default.
 AC_ARG_ENABLE([utrace],
   [AS_HELP_STRING([--enable-utrace], [Enable utrace(2)-based tracing])],
 [if test "x$enable_utrace" = "xno" ; then
   enable_utrace="0"
 else
   enable_utrace="1"
 fi
 ],
 [enable_utrace="0"]
 )
 JE_COMPILABLE([utrace(2)], [
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/time.h>
 #include <sys/uio.h>
 #include <sys/ktrace.h>
 ], [
 	utrace((void *)0, 0);
 ], [je_cv_utrace])
 if test "x${je_cv_utrace}" = "xno" ; then
   enable_utrace="0"
 fi
 if test "x$enable_utrace" = "x1" ; then
   AC_DEFINE([JEMALLOC_UTRACE], [ ])
 fi
 AC_SUBST([enable_utrace])
 dnl Support Valgrind by default.
 AC_ARG_ENABLE([valgrind],
   [AS_HELP_STRING([--disable-valgrind], [Disable support for Valgrind])],
 [if test "x$enable_valgrind" = "xno" ; then
   enable_valgrind="0"
 else
   enable_valgrind="1"
 fi
 ],
 [enable_valgrind="1"]
 )
 if test "x$enable_valgrind" = "x1" ; then
   JE_COMPILABLE([valgrind], [
 #include <valgrind/valgrind.h>
 #include <valgrind/memcheck.h>
 #if !defined(VALGRIND_RESIZEINPLACE_BLOCK)
 #  error "Incompatible Valgrind version"
 #endif
 ], [], [je_cv_valgrind])
   if test "x${je_cv_valgrind}" = "xno" ; then
     enable_valgrind="0"
   fi
   if test "x$enable_valgrind" = "x1" ; then
     AC_DEFINE([JEMALLOC_VALGRIND], [ ])
   fi
 fi
 AC_SUBST([enable_valgrind])
 dnl Do not support the xmalloc option by default.
 AC_ARG_ENABLE([xmalloc],
   [AS_HELP_STRING([--enable-xmalloc], [Support xmalloc option])],
 [if test "x$enable_xmalloc" = "xno" ; then
   enable_xmalloc="0"
 else
   enable_xmalloc="1"
 fi
 ],
 [enable_xmalloc="0"]
 )
 if test "x$enable_xmalloc" = "x1" ; then
   AC_DEFINE([JEMALLOC_XMALLOC], [ ])
 fi
 AC_SUBST([enable_xmalloc])
 AC_CACHE_CHECK([STATIC_PAGE_SHIFT],
                [je_cv_static_page_shift],
                AC_RUN_IFELSE([AC_LANG_PROGRAM(
 [[
 #include <strings.h>
 #ifdef _WIN32
 #include <windows.h>
 #else
 #include <unistd.h>
 #endif
 #include <stdio.h>
 ]],
 [[
     long result;
     FILE *f;
 #ifdef _WIN32
     SYSTEM_INFO si;
     GetSystemInfo(&si);
     result = si.dwPageSize;
 #else
     result = sysconf(_SC_PAGESIZE);
 #endif
     if (result == -1) {
 	return 1;
     }
     result = ffsl(result) - 1;
     f = fopen("conftest.out", "w");
     if (f == NULL) {
 	return 1;
     }
     fprintf(f, "%u\n", result);
     fclose(f);
     return 0;
 ]])],
                              [je_cv_static_page_shift=`cat conftest.out`],
                              [je_cv_static_page_shift=undefined]))
 if test "x$je_cv_static_page_shift" != "xundefined"; then
    AC_DEFINE_UNQUOTED([STATIC_PAGE_SHIFT], [$je_cv_static_page_shift])
 else
    AC_MSG_ERROR([cannot determine value for STATIC_PAGE_SHIFT])
 fi
 dnl ============================================================================
 dnl jemalloc configuration.
 dnl
 dnl Set VERSION if source directory has an embedded git repository.
 if test -d "${srcroot}.git" ; then
   git describe --long --abbrev=40 > ${srcroot}VERSION
 fi
 jemalloc_version=`cat ${srcroot}VERSION`
 jemalloc_version_major=`echo ${jemalloc_version} | tr ".g-" " " | awk '{print [$]1}'`
 jemalloc_version_minor=`echo ${jemalloc_version} | tr ".g-" " " | awk '{print [$]2}'`
 jemalloc_version_bugfix=`echo ${jemalloc_version} | tr ".g-" " " | awk '{print [$]3}'`
 jemalloc_version_nrev=`echo ${jemalloc_version} | tr ".g-" " " | awk '{print [$]4}'`
 jemalloc_version_gid=`echo ${jemalloc_version} | tr ".g-" " " | awk '{print [$]5}'`
 AC_SUBST([jemalloc_version])
 AC_SUBST([jemalloc_version_major])
 AC_SUBST([jemalloc_version_minor])
 AC_SUBST([jemalloc_version_bugfix])
 AC_SUBST([jemalloc_version_nrev])
 AC_SUBST([jemalloc_version_gid])
 dnl ============================================================================
 dnl Configure pthreads.
 if test "x$abi" != "xpecoff" ; then
   AC_CHECK_HEADERS([pthread.h], , [AC_MSG_ERROR([pthread.h is missing])])
   dnl Some systems may embed pthreads functionality in libc; check for libpthread
   dnl first, but try libc too before failing.
   AC_CHECK_LIB([pthread], [pthread_create], [LIBS="$LIBS -lpthread"],
                [AC_SEARCH_LIBS([pthread_create], , ,
                                AC_MSG_ERROR([libpthread is missing]))])
 fi
 CPPFLAGS="$CPPFLAGS -D_REENTRANT"
 dnl Check whether the BSD-specific _malloc_thread_cleanup() exists.  If so, use
 dnl it rather than pthreads TSD cleanup functions to support cleanup during
 dnl thread exit, in order to avoid pthreads library recursion during
 dnl bootstrapping.
 AC_CHECK_FUNC([_malloc_thread_cleanup],
               [have__malloc_thread_cleanup="1"],
               [have__malloc_thread_cleanup="0"]
              )
 if test "x$have__malloc_thread_cleanup" = "x1" ; then
   AC_DEFINE([JEMALLOC_MALLOC_THREAD_CLEANUP], [ ])
   force_tls="1"
 fi
 dnl Check whether the BSD-specific _pthread_mutex_init_calloc_cb() exists.  If
 dnl so, mutex initialization causes allocation, and we need to implement this
 dnl callback function in order to prevent recursive allocation.
 AC_CHECK_FUNC([_pthread_mutex_init_calloc_cb],
               [have__pthread_mutex_init_calloc_cb="1"],
               [have__pthread_mutex_init_calloc_cb="0"]
              )
 if test "x$have__pthread_mutex_init_calloc_cb" = "x1" ; then
   AC_DEFINE([JEMALLOC_MUTEX_INIT_CB])
 fi
 dnl Disable lazy locking by default.
 AC_ARG_ENABLE([lazy_lock],
   [AS_HELP_STRING([--enable-lazy-lock],
   [Enable lazy locking (only lock when multi-threaded)])],
 [if test "x$enable_lazy_lock" = "xno" ; then
   enable_lazy_lock="0"
 else
   enable_lazy_lock="1"
 fi
 ],
 [enable_lazy_lock="0"]
 )
 if test "x$enable_lazy_lock" = "x0" -a "x${force_lazy_lock}" = "x1" ; then
   AC_MSG_RESULT([Forcing lazy-lock to avoid allocator/threading bootstrap issues])
   enable_lazy_lock="1"
 fi
 if test "x$enable_lazy_lock" = "x1" ; then
   if test "x$abi" != "xpecoff" ; then
     AC_CHECK_HEADERS([dlfcn.h], , [AC_MSG_ERROR([dlfcn.h is missing])])
     AC_CHECK_FUNC([dlsym], [],
       [AC_CHECK_LIB([dl], [dlsym], [LIBS="$LIBS -ldl"],
                     [AC_MSG_ERROR([libdl is missing])])
       ])
   fi
   AC_DEFINE([JEMALLOC_LAZY_LOCK], [ ])
 fi
 AC_SUBST([enable_lazy_lock])
 AC_ARG_ENABLE([tls],
   [AS_HELP_STRING([--disable-tls], [Disable thread-local storage (__thread keyword)])],
 if test "x$enable_tls" = "xno" ; then
   enable_tls="0"
 else
   enable_tls="1"
 fi
 ,
 enable_tls="1"
 )
 if test "x${enable_tls}" = "x0" -a "x${force_tls}" = "x1" ; then
   AC_MSG_RESULT([Forcing TLS to avoid allocator/threading bootstrap issues])
   enable_tls="1"
 fi
 if test "x${enable_tls}" = "x1" -a "x${force_tls}" = "x0" ; then
   AC_MSG_RESULT([Forcing no TLS to avoid allocator/threading bootstrap issues])
   enable_tls="0"
 fi
 if test "x${enable_tls}" = "x1" ; then
 AC_MSG_CHECKING([for TLS])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 [[
     __thread int x;
 ]], [[
     x = 42;
     return 0;
 ]])],
               AC_MSG_RESULT([yes]),
               AC_MSG_RESULT([no])
               enable_tls="0")
 fi
 AC_SUBST([enable_tls])
 if test "x${enable_tls}" = "x1" ; then
   AC_DEFINE_UNQUOTED([JEMALLOC_TLS], [ ])
 elif test "x${force_tls}" = "x1" ; then
   AC_MSG_ERROR([Failed to configure TLS, which is mandatory for correct function])
 fi
 dnl ============================================================================
 dnl Check for ffsl(3), and fail if not found.  This function exists on all
 dnl platforms that jemalloc currently has a chance of functioning on without
 dnl modification.
 JE_COMPILABLE([a program using ffsl], [
 #include <strings.h>
 #include <string.h>
 ], [
 	{
 		int rv = ffsl(0x08);
 	}
 ], [je_cv_function_ffsl])
 if test "x${je_cv_function_ffsl}" != "xyes" ; then
    AC_MSG_ERROR([Cannot build without ffsl(3)])
 fi
 dnl ============================================================================
 dnl Check for atomic(9) operations as provided on FreeBSD.
 JE_COMPILABLE([atomic(9)], [
 #include <sys/types.h>
 #include <machine/atomic.h>
 #include <inttypes.h>
 ], [
 	{
 		uint32_t x32 = 0;
 		volatile uint32_t *x32p = &x32;
 		atomic_fetchadd_32(x32p, 1);
 	}
 	{
 		unsigned long xlong = 0;
 		volatile unsigned long *xlongp = &xlong;
 		atomic_fetchadd_long(xlongp, 1);
 	}
 ], [je_cv_atomic9])
 if test "x${je_cv_atomic9}" = "xyes" ; then
   AC_DEFINE([JEMALLOC_ATOMIC9])
 fi
 dnl ============================================================================
 dnl Check for atomic(3) operations as provided on Darwin.
 JE_COMPILABLE([Darwin OSAtomic*()], [
 #include <libkern/OSAtomic.h>
 #include <inttypes.h>
 ], [
 	{
 		int32_t x32 = 0;
 		volatile int32_t *x32p = &x32;
 		OSAtomicAdd32(1, x32p);
 	}
 	{
 		int64_t x64 = 0;
 		volatile int64_t *x64p = &x64;
 		OSAtomicAdd64(1, x64p);
 	}
 ], [je_cv_osatomic])
 if test "x${je_cv_osatomic}" = "xyes" ; then
   AC_DEFINE([JEMALLOC_OSATOMIC], [ ])
 fi
 dnl ============================================================================
 dnl Check whether __sync_{add,sub}_and_fetch() are available despite
 dnl __GCC_HAVE_SYNC_COMPARE_AND_SWAP_n macros being undefined.
 AC_DEFUN([JE_SYNC_COMPARE_AND_SWAP_CHECK],[
   AC_CACHE_CHECK([whether to force $1-bit __sync_{add,sub}_and_fetch()],
                [je_cv_sync_compare_and_swap_$2],
                [AC_LINK_IFELSE([AC_LANG_PROGRAM([
                                                  #include <stdint.h>
                                                 ],
                                                 [
                                                  #ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_$2
                                                  {
                                                     uint$1_t x$1 = 0;
                                                     __sync_add_and_fetch(&x$1, 42);
                                                     __sync_sub_and_fetch(&x$1, 1);
                                                  }
                                                  #else
                                                  #error __GCC_HAVE_SYNC_COMPARE_AND_SWAP_$2 is defined, no need to force
                                                  #endif
                                                 ])],
                                [je_cv_sync_compare_and_swap_$2=yes],
                                [je_cv_sync_compare_and_swap_$2=no])])
   if test "x${je_cv_sync_compare_and_swap_$2}" = "xyes" ; then
     AC_DEFINE([JE_FORCE_SYNC_COMPARE_AND_SWAP_$2], [ ])
   fi
 ])
 if test "x${je_cv_atomic9}" != "xyes" -a "x${je_cv_osatomic}" != "xyes" ; then
   JE_SYNC_COMPARE_AND_SWAP_CHECK(32, 4)
   JE_SYNC_COMPARE_AND_SWAP_CHECK(64, 8)
 fi
 dnl ============================================================================
 dnl Check for spinlock(3) operations as provided on Darwin.
 JE_COMPILABLE([Darwin OSSpin*()], [
 #include <libkern/OSAtomic.h>
 #include <inttypes.h>
 ], [
 	OSSpinLock lock = 0;
 	OSSpinLockLock(&lock);
 	OSSpinLockUnlock(&lock);
 ], [je_cv_osspin])
 if test "x${je_cv_osspin}" = "xyes" ; then
   AC_DEFINE([JEMALLOC_OSSPIN], [ ])
 fi
 dnl ============================================================================
 dnl Darwin-related configuration.
 if test "x${abi}" = "xmacho" ; then
   AC_DEFINE([JEMALLOC_IVSALLOC], [ ])
   AC_DEFINE([JEMALLOC_ZONE], [ ])
   dnl The szone version jumped from 3 to 6 between the OS X 10.5.x and 10.6
   dnl releases.  malloc_zone_t and malloc_introspection_t have new fields in
   dnl 10.6, which is the only source-level indication of the change.
   AC_MSG_CHECKING([malloc zone version])
   AC_DEFUN([JE_ZONE_PROGRAM],
     [AC_LANG_PROGRAM(
       [#include <malloc/malloc.h>],
       [static foo[[sizeof($1) $2 sizeof(void *) * $3 ? 1 : -1]]]
     )])
   AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_zone_t,==,14)],[JEMALLOC_ZONE_VERSION=3],[
   AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_zone_t,==,15)],[JEMALLOC_ZONE_VERSION=5],[
   AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_zone_t,==,16)],[
     AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_introspection_t,==,9)],[JEMALLOC_ZONE_VERSION=6],[
     AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_introspection_t,==,13)],[JEMALLOC_ZONE_VERSION=7],[JEMALLOC_ZONE_VERSION=]
   )])],[
   AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_zone_t,==,17)],[JEMALLOC_ZONE_VERSION=8],[
   AC_COMPILE_IFELSE([JE_ZONE_PROGRAM(malloc_zone_t,>,17)],[JEMALLOC_ZONE_VERSION=9],[JEMALLOC_ZONE_VERSION=]
   )])])])])
   if test "x${JEMALLOC_ZONE_VERSION}" = "x"; then
     AC_MSG_RESULT([unsupported])
     AC_MSG_ERROR([Unsupported malloc zone version])
   fi
   if test "${JEMALLOC_ZONE_VERSION}" = 9; then
     JEMALLOC_ZONE_VERSION=8
     AC_MSG_RESULT([> 8])
   else
     AC_MSG_RESULT([$JEMALLOC_ZONE_VERSION])
   fi
   AC_DEFINE_UNQUOTED(JEMALLOC_ZONE_VERSION, [$JEMALLOC_ZONE_VERSION])
 fi
 dnl ============================================================================
 dnl Check for typedefs, structures, and compiler characteristics.
 AC_HEADER_STDBOOL
 AC_CONFIG_COMMANDS([include/jemalloc/internal/size_classes.h], [
   mkdir -p "include/jemalloc/internal"
   "${srcdir}/include/jemalloc/internal/size_classes.sh" > "${objroot}include/jemalloc/internal/size_classes.h"
 ])
 dnl Process .in files.
 AC_SUBST([cfghdrs_in])
 AC_SUBST([cfghdrs_out])
 AC_CONFIG_HEADERS([$cfghdrs_tup])
 dnl ============================================================================
 dnl Generate outputs.
 AC_CONFIG_FILES([$cfgoutputs_tup config.stamp bin/jemalloc.sh])
 AC_SUBST([cfgoutputs_in])
 AC_SUBST([cfgoutputs_out])
 AC_OUTPUT
 dnl ============================================================================
 dnl Print out the results of configuration.
 AC_MSG_RESULT([===============================================================================])
 AC_MSG_RESULT([jemalloc version   : ${jemalloc_version}])
 AC_MSG_RESULT([library revision   : ${rev}])
 AC_MSG_RESULT([])
 AC_MSG_RESULT([CC                 : ${CC}])
 AC_MSG_RESULT([CPPFLAGS           : ${CPPFLAGS}])
 AC_MSG_RESULT([CFLAGS             : ${CFLAGS}])
 AC_MSG_RESULT([LDFLAGS            : ${LDFLAGS}])
 AC_MSG_RESULT([LIBS               : ${LIBS}])
 AC_MSG_RESULT([RPATH_EXTRA        : ${RPATH_EXTRA}])
 AC_MSG_RESULT([])
 AC_MSG_RESULT([XSLTPROC           : ${XSLTPROC}])
 AC_MSG_RESULT([XSLROOT            : ${XSLROOT}])
 AC_MSG_RESULT([])
 AC_MSG_RESULT([PREFIX             : ${PREFIX}])
 AC_MSG_RESULT([BINDIR             : ${BINDIR}])
 AC_MSG_RESULT([INCLUDEDIR         : ${INCLUDEDIR}])
 AC_MSG_RESULT([LIBDIR             : ${LIBDIR}])
 AC_MSG_RESULT([DATADIR            : ${DATADIR}])
 AC_MSG_RESULT([MANDIR             : ${MANDIR}])
 AC_MSG_RESULT([])
 AC_MSG_RESULT([srcroot            : ${srcroot}])
 AC_MSG_RESULT([abs_srcroot        : ${abs_srcroot}])
 AC_MSG_RESULT([objroot            : ${objroot}])
 AC_MSG_RESULT([abs_objroot        : ${abs_objroot}])
 AC_MSG_RESULT([])
 AC_MSG_RESULT([JEMALLOC_PREFIX    : ${JEMALLOC_PREFIX}])
 AC_MSG_RESULT([JEMALLOC_PRIVATE_NAMESPACE])
 AC_MSG_RESULT([                   : ${JEMALLOC_PRIVATE_NAMESPACE}])
 AC_MSG_RESULT([install_suffix     : ${install_suffix}])
 AC_MSG_RESULT([autogen            : ${enable_autogen}])
 AC_MSG_RESULT([experimental       : ${enable_experimental}])
 AC_MSG_RESULT([cc-silence         : ${enable_cc_silence}])
 AC_MSG_RESULT([debug              : ${enable_debug}])
 AC_MSG_RESULT([stats              : ${enable_stats}])
 AC_MSG_RESULT([prof               : ${enable_prof}])
 AC_MSG_RESULT([prof-libunwind     : ${enable_prof_libunwind}])
 AC_MSG_RESULT([prof-libgcc        : ${enable_prof_libgcc}])
 AC_MSG_RESULT([prof-gcc           : ${enable_prof_gcc}])
 AC_MSG_RESULT([tcache             : ${enable_tcache}])
 AC_MSG_RESULT([fill               : ${enable_fill}])
 AC_MSG_RESULT([utrace             : ${enable_utrace}])
 AC_MSG_RESULT([valgrind           : ${enable_valgrind}])
 AC_MSG_RESULT([xmalloc            : ${enable_xmalloc}])
 AC_MSG_RESULT([mremap             : ${enable_mremap}])
 AC_MSG_RESULT([munmap             : ${enable_munmap}])
 AC_MSG_RESULT([dss                : ${enable_dss}])
 AC_MSG_RESULT([lazy_lock          : ${enable_lazy_lock}])
 AC_MSG_RESULT([tls                : ${enable_tls}])
 AC_MSG_RESULT([===============================================================================])

The Tor Browser / annotate

memory/jemalloc/src/configure.ac@6474c204b198 (annotated)

memory/jemalloc/src/configure.ac