]> git.saurik.com Git - redis.git/blobdiff - deps/jemalloc/configure.ac
jemalloc source added
[redis.git] / deps / jemalloc / configure.ac
diff --git a/deps/jemalloc/configure.ac b/deps/jemalloc/configure.ac
new file mode 100644 (file)
index 0000000..412d3d1
--- /dev/null
@@ -0,0 +1,927 @@
+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} $1"
+fi
+AC_RUN_IFELSE([AC_LANG_PROGRAM(
+[[
+]], [[
+    return 0;
+]])],
+              AC_MSG_RESULT([yes]),
+              AC_MSG_RESULT([no])
+              [CFLAGS="${TCFLAGS}"]
+)
+])
+
+dnl JE_COMPILABLE(label, hcode, mcode, rvar)
+AC_DEFUN([JE_COMPILABLE],
+[
+AC_MSG_CHECKING([whether $1 is compilable])
+AC_RUN_IFELSE([AC_LANG_PROGRAM(
+[$2], [$3])],
+              AC_MSG_RESULT([yes])
+              [$4="yes"],
+              AC_MSG_RESULT([no])
+              [$4="no"]
+)
+])
+
+dnl ============================================================================
+
+srcroot=$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])
+AC_ARG_WITH([xslroot],
+  [AS_HELP_STRING([--with-xslroot=<path>], [XSL stylesheet root path])],
+if test "x$with_xslroot" = "xno" ; then
+  XSLROOT="/usr/share/xml/docbook/stylesheet/docbook-xsl"
+else
+  XSLROOT="${with_xslroot}"
+fi,
+  XSLROOT="/usr/share/xml/docbook/stylesheet/docbook-xsl"
+)
+AC_SUBST([XSLROOT])
+
+dnl If CFLAGS isn't defined, set CFLAGS to something reasonable.  Otherwise,
+dnl just prevent autoconf from molesting CFLAGS.
+CFLAGS=$CFLAGS
+AC_PROG_CC
+if test "x$CFLAGS" = "x" ; then
+  no_CFLAGS="yes"
+  if test "x$GCC" = "xyes" ; then
+    JE_CFLAGS_APPEND([-std=gnu99])
+    JE_CFLAGS_APPEND([-Wall])
+    JE_CFLAGS_APPEND([-pipe])
+    JE_CFLAGS_APPEND([-g3])
+  fi
+fi
+dnl Append EXTRA_CFLAGS to CFLAGS, if defined.
+if test "x$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_CANONICAL_HOST
+dnl CPU-specific settings.
+CPU_SPINWAIT=""
+case "${host_cpu}" in
+  i[[345]]86)
+       ;;
+  i686)
+       JE_COMPILABLE([__asm__], [], [[__asm__ volatile("pause"); return 0;]],
+                     [asm])
+       if test "x${asm}" = "xyes" ; then
+           CPU_SPINWAIT='__asm__ volatile("pause")'
+       fi
+       ;;
+  x86_64)
+       JE_COMPILABLE([__asm__ syntax], [],
+                     [[__asm__ volatile("pause"); return 0;]], [asm])
+       if test "x${asm}" = "xyes" ; then
+           CPU_SPINWAIT='__asm__ volatile("pause")'
+       fi
+       ;;
+  *)
+       ;;
+esac
+AC_DEFINE_UNQUOTED([CPU_SPINWAIT], [$CPU_SPINWAIT])
+
+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.
+case "${host}" in
+  *-*-darwin*)
+       CFLAGS="$CFLAGS -fno-common -no-cpp-precomp"
+       abi="macho"
+       AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE])
+       RPATH=""
+       ;;
+  *-*-freebsd*)
+       CFLAGS="$CFLAGS"
+       abi="elf"
+       AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE])
+       RPATH="-Wl,-rpath,"
+       ;;
+  *-*-linux*)
+       CFLAGS="$CFLAGS"
+       CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
+       abi="elf"
+       AC_DEFINE([JEMALLOC_PURGE_MADVISE_DONTNEED])
+       RPATH="-Wl,-rpath,"
+       ;;
+  *-*-netbsd*)
+       AC_MSG_CHECKING([ABI])
+        AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+[[#ifdef __ELF__
+/* ELF */
+#else
+#error aout
+#endif
+]])],
+                          [CFLAGS="$CFLAGS"; abi="elf"],
+                          [abi="aout"])
+       AC_MSG_RESULT([$abi])
+       AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE])
+       RPATH="-Wl,-rpath,"
+       ;;
+  *-*-solaris2*)
+       CFLAGS="$CFLAGS"
+       abi="elf"
+       RPATH="-Wl,-R,"
+       dnl Solaris needs this for sigwait().
+       CPPFLAGS="$CPPFLAGS -D_POSIX_PTHREAD_SEMANTICS"
+       LIBS="$LIBS -lposix4 -lsocket -lnsl"
+       ;;
+  *)
+       AC_MSG_RESULT([Unsupported operating system: ${host}])
+       abi="elf"
+       RPATH="-Wl,-rpath,"
+       ;;
+esac
+AC_SUBST([abi])
+AC_SUBST([RPATH])
+
+JE_COMPILABLE([__attribute__ syntax],
+              [static __attribute__((unused)) void foo(void){}],
+              [],
+              [attribute])
+if test "x${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
+
+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);
+], [mremap_fixed])
+if test "x${mremap_fixed}" = "xyes" ; then
+  AC_DEFINE([JEMALLOC_MREMAP_FIXED])
+fi
+
+dnl Support optional additions to rpath.
+AC_ARG_WITH([rpath],
+  [AS_HELP_STRING([--with-rpath=<rpath>], [Colon-separated rpath (ELF systems only)])],
+if test "x$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], , [$PATH])
+
+dnl Do not prefix public APIs by default.
+AC_ARG_WITH([jemalloc_prefix],
+  [AS_HELP_STRING([--with-jemalloc-prefix=<prefix>], [Prefix to prepend to all public APIs])],
+  [JEMALLOC_PREFIX="$with_jemalloc_prefix"],
+  [if test "x$abi" != "xmacho" ; then
+  JEMALLOC_PREFIX=""
+else
+  JEMALLOC_PREFIX="je_"
+fi]
+)
+if test "x$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], ["$JEMALLOC_CPREFIX"])
+  jemalloc_prefix="$JEMALLOC_PREFIX"
+  jemalloc_cprefix="$JEMALLOC_CPREFIX"
+  AC_SUBST([jemalloc_prefix])
+  AC_SUBST([jemalloc_cprefix])
+  AC_DEFINE_UNQUOTED([JEMALLOC_P(string_that_no_one_should_want_to_use_as_a_jemalloc_API_prefix)], [${JEMALLOC_PREFIX}##string_that_no_one_should_want_to_use_as_a_jemalloc_API_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_out="include/jemalloc/jemalloc_defs${install_suffix}.h"
+
+cfghdrs_tup="include/jemalloc/jemalloc_defs${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$GCC" = "xyes" ; then
+      JE_CFLAGS_APPEND([-O3])
+      JE_CFLAGS_APPEND([-funroll-loops])
+    else
+      JE_CFLAGS_APPEND([-O])
+    fi
+  fi
+fi
+
+dnl Do not enable statistics calculation by default.
+AC_ARG_ENABLE([stats],
+  [AS_HELP_STRING([--enable-stats], [Enable statistics calculation/reporting])],
+[if test "x$enable_stats" = "xno" ; then
+  enable_stats="0"
+else
+  enable_stats="1"
+fi
+],
+[enable_stats="0"]
+)
+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
+  LIBS="$LIBS -lm"
+  AC_DEFINE([JEMALLOC_PROF], [ ])
+fi
+AC_SUBST([enable_prof])
+
+dnl Enable tiny allocations by default.
+AC_ARG_ENABLE([tiny],
+  [AS_HELP_STRING([--disable-tiny], [Disable tiny (sub-quantum) allocations])],
+[if test "x$enable_tiny" = "xno" ; then
+  enable_tiny="0"
+else
+  enable_tiny="1"
+fi
+],
+[enable_tiny="1"]
+)
+if test "x$enable_tiny" = "x1" ; then
+  AC_DEFINE([JEMALLOC_TINY], [ ])
+fi
+AC_SUBST([enable_tiny])
+
+dnl Enable thread-specific caching by default.
+AC_ARG_ENABLE([tcache],
+  [AS_HELP_STRING([--disable-tcache], [Disable per thread caches])],
+[if test "x$enable_tcache" = "xno" ; then
+  enable_tcache="0"
+else
+  enable_tcache="1"
+fi
+],
+[enable_tcache="1"]
+)
+if test "x$enable_tcache" = "x1" ; then
+  AC_DEFINE([JEMALLOC_TCACHE], [ ])
+fi
+AC_SUBST([enable_tcache])
+
+dnl Do not enable mmap()ped swap files by default.
+AC_ARG_ENABLE([swap],
+  [AS_HELP_STRING([--enable-swap], [Enable mmap()ped swap files])],
+[if test "x$enable_swap" = "xno" ; then
+  enable_swap="0"
+else
+  enable_swap="1"
+fi
+],
+[enable_swap="0"]
+)
+if test "x$enable_swap" = "x1" ; then
+  AC_DEFINE([JEMALLOC_SWAP], [ ])
+fi
+AC_SUBST([enable_swap])
+
+dnl Do not enable allocation from DSS by default.
+AC_ARG_ENABLE([dss],
+  [AS_HELP_STRING([--enable-dss], [Enable allocation from DSS])],
+[if test "x$enable_dss" = "xno" ; then
+  enable_dss="0"
+else
+  enable_dss="1"
+fi
+],
+[enable_dss="0"]
+)
+if test "x$enable_dss" = "x1" ; then
+  AC_DEFINE([JEMALLOC_DSS], [ ])
+fi
+AC_SUBST([enable_dss])
+
+dnl Do not support the junk/zero filling option by default.
+AC_ARG_ENABLE([fill],
+  [AS_HELP_STRING([--enable-fill], [Support junk/zero filling option])],
+[if test "x$enable_fill" = "xno" ; then
+  enable_fill="0"
+else
+  enable_fill="1"
+fi
+],
+[enable_fill="0"]
+)
+if test "x$enable_fill" = "x1" ; then
+  AC_DEFINE([JEMALLOC_FILL], [ ])
+fi
+AC_SUBST([enable_fill])
+
+dnl Do not support the xmalloc option by default.
+AC_ARG_ENABLE([xmalloc],
+  [AS_HELP_STRING([--enable-xmalloc], [Support xmalloc option])],
+[if test "x$enable_xmalloc" = "xno" ; then
+  enable_xmalloc="0"
+else
+  enable_xmalloc="1"
+fi
+],
+[enable_xmalloc="0"]
+)
+if test "x$enable_xmalloc" = "x1" ; then
+  AC_DEFINE([JEMALLOC_XMALLOC], [ ])
+fi
+AC_SUBST([enable_xmalloc])
+
+dnl Do not support the SYSV option by default.
+AC_ARG_ENABLE([sysv],
+  [AS_HELP_STRING([--enable-sysv], [Support SYSV semantics option])],
+[if test "x$enable_sysv" = "xno" ; then
+  enable_sysv="0"
+else
+  enable_sysv="1"
+fi
+],
+[enable_sysv="0"]
+)
+if test "x$enable_sysv" = "x1" ; then
+  AC_DEFINE([JEMALLOC_SYSV], [ ])
+fi
+AC_SUBST([enable_sysv])
+
+dnl Do not determine page shift at run time by default.
+AC_ARG_ENABLE([dynamic_page_shift],
+  [AS_HELP_STRING([--enable-dynamic-page-shift],
+  [Determine page size at run time (don't trust configure result)])],
+[if test "x$enable_dynamic_page_shift" = "xno" ; then
+  enable_dynamic_page_shift="0"
+else
+  enable_dynamic_page_shift="1"
+fi
+],
+[enable_dynamic_page_shift="0"]
+)
+if test "x$enable_dynamic_page_shift" = "x1" ; then
+  AC_DEFINE([DYNAMIC_PAGE_SHIFT], [ ])
+fi
+AC_SUBST([enable_dynamic_page_shift])
+
+AC_MSG_CHECKING([STATIC_PAGE_SHIFT])
+AC_RUN_IFELSE([AC_LANG_PROGRAM(
+[[#include <stdio.h>
+#include <unistd.h>
+#include <strings.h>
+]], [[
+    long result;
+    FILE *f;
+
+    result = sysconf(_SC_PAGESIZE);
+    if (result == -1) {
+       return 1;
+    }
+    f = fopen("conftest.out", "w");
+    if (f == NULL) {
+       return 1;
+    }
+    fprintf(f, "%u\n", ffs((int)result) - 1);
+    close(f);
+
+    return 0;
+]])],
+              [STATIC_PAGE_SHIFT=`cat conftest.out`]
+              AC_MSG_RESULT([$STATIC_PAGE_SHIFT])
+              AC_DEFINE_UNQUOTED([STATIC_PAGE_SHIFT], [$STATIC_PAGE_SHIFT]),
+              AC_MSG_RESULT([error]))
+
+dnl ============================================================================
+dnl jemalloc configuration.
+dnl 
+
+dnl Set VERSION if source directory has an embedded git repository.
+if test -d "${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.
+
+AC_CHECK_HEADERS([pthread.h], , [AC_MSG_ERROR([pthread.h is missing])])
+AC_CHECK_LIB([pthread], [pthread_create], [LIBS="$LIBS -lpthread"],
+             [AC_MSG_ERROR([libpthread is missing])])
+
+CPPFLAGS="$CPPFLAGS -D_REENTRANT"
+
+dnl Enable lazy locking by default.
+AC_ARG_ENABLE([lazy_lock],
+  [AS_HELP_STRING([--disable-lazy-lock],
+  [Disable lazy locking (always lock, even when single-threaded)])],
+[if test "x$enable_lazy_lock" = "xno" ; then
+  enable_lazy_lock="0"
+else
+  enable_lazy_lock="1"
+fi
+],
+[enable_lazy_lock="1"]
+)
+if test "x$enable_lazy_lock" = "x1" ; then
+  AC_CHECK_HEADERS([dlfcn.h], , [AC_MSG_ERROR([dlfcn.h is missing])])
+  AC_CHECK_LIB([dl], [dlopen], [LIBS="$LIBS -ldl"],
+               [AC_MSG_ERROR([libdl is missing])])
+  AC_DEFINE([JEMALLOC_LAZY_LOCK], [ ])
+fi
+AC_SUBST([enable_lazy_lock])
+
+AC_ARG_ENABLE([tls],
+  [AS_HELP_STRING([--disable-tls], [Disable thread-local storage (__thread keyword)])],
+if test "x$enable_tls" = "xno" ; then
+  enable_tls="0"
+else
+  enable_tls="1"
+fi
+,
+enable_tls="1"
+)
+if test "x${enable_tls}" = "x1" ; then
+AC_MSG_CHECKING([for TLS])
+AC_RUN_IFELSE([AC_LANG_PROGRAM(
+[[
+    __thread int x;
+]], [[
+    x = 42;
+
+    return 0;
+]])],
+              AC_MSG_RESULT([yes]),
+              AC_MSG_RESULT([no])
+              enable_tls="0")
+fi
+AC_SUBST([enable_tls])
+if test "x${enable_tls}" = "x0" ; then
+  AC_DEFINE_UNQUOTED([NO_TLS], [ ])
+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.
+
+AC_CHECK_FUNC([ffsl], [],
+             [AC_MSG_ERROR([Cannot build without ffsl(3)])])
+
+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);
+       }
+], [osatomic])
+if test "x${osatomic}" = "xyes" ; then
+  AC_DEFINE([JEMALLOC_OSATOMIC])
+fi
+
+dnl ============================================================================
+dnl Check for spinlock(3) operations as provided on Darwin.
+
+JE_COMPILABLE([Darwin OSSpin*()], [
+#include <libkern/OSAtomic.h>
+#include <inttypes.h>
+], [
+       OSSpinLock lock = 0;
+       OSSpinLockLock(&lock);
+       OSSpinLockUnlock(&lock);
+], [osspin])
+if test "x${osspin}" = "xyes" ; then
+  AC_DEFINE([JEMALLOC_OSSPIN])
+fi
+
+dnl ============================================================================
+dnl Check for allocator-related functions that should be wrapped.
+
+AC_CHECK_FUNC([memalign],
+             [AC_DEFINE([JEMALLOC_OVERRIDE_MEMALIGN])])
+AC_CHECK_FUNC([valloc],
+             [AC_DEFINE([JEMALLOC_OVERRIDE_VALLOC])])
+
+dnl ============================================================================
+dnl Darwin-related configuration.
+
+if test "x${abi}" = "xmacho" ; then
+  AC_DEFINE([JEMALLOC_IVSALLOC])
+  AC_DEFINE([JEMALLOC_ZONE])
+
+  dnl The szone version jumped from 3 to 6 between the OS X 10.5.x and 10.6
+  dnl releases.  malloc_zone_t and malloc_introspection_t have new fields in
+  dnl 10.6, which is the only source-level indication of the change.
+  AC_MSG_CHECKING([malloc zone version])
+  AC_TRY_COMPILE([#include <stdlib.h>
+#include <malloc/malloc.h>], [
+       static malloc_zone_t zone;
+       static struct malloc_introspection_t zone_introspect;
+
+       zone.size = NULL;
+       zone.malloc = NULL;
+       zone.calloc = NULL;
+       zone.valloc = NULL;
+       zone.free = NULL;
+       zone.realloc = NULL;
+       zone.destroy = NULL;
+       zone.zone_name = "jemalloc_zone";
+       zone.batch_malloc = NULL;
+       zone.batch_free = NULL;
+       zone.introspect = &zone_introspect;
+       zone.version = 6;
+       zone.memalign = NULL;
+       zone.free_definite_size = NULL;
+
+       zone_introspect.enumerator = NULL;
+       zone_introspect.good_size = NULL;
+       zone_introspect.check = NULL;
+       zone_introspect.print = NULL;
+       zone_introspect.log = NULL;
+       zone_introspect.force_lock = NULL;
+       zone_introspect.force_unlock = NULL;
+       zone_introspect.statistics = NULL;
+       zone_introspect.zone_locked = NULL;
+], [AC_DEFINE_UNQUOTED([JEMALLOC_ZONE_VERSION], [6])
+    AC_MSG_RESULT([6])],
+   [AC_DEFINE_UNQUOTED([JEMALLOC_ZONE_VERSION], [3])
+   AC_MSG_RESULT([3])])
+fi
+
+dnl ============================================================================
+dnl Check for typedefs, structures, and compiler characteristics.
+AC_HEADER_STDBOOL
+
+dnl Process .in files.
+AC_SUBST([cfghdrs_in])
+AC_SUBST([cfghdrs_out])
+AC_CONFIG_HEADERS([$cfghdrs_tup])
+
+dnl ============================================================================
+dnl Generate outputs.
+AC_CONFIG_FILES([$cfgoutputs_tup config.stamp])
+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([])
+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([install_suffix     : ${install_suffix}])
+AC_MSG_RESULT([autogen            : ${enable_autogen}])
+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([tiny               : ${enable_tiny}])
+AC_MSG_RESULT([tcache             : ${enable_tcache}])
+AC_MSG_RESULT([fill               : ${enable_fill}])
+AC_MSG_RESULT([xmalloc            : ${enable_xmalloc}])
+AC_MSG_RESULT([sysv               : ${enable_sysv}])
+AC_MSG_RESULT([swap               : ${enable_swap}])
+AC_MSG_RESULT([dss                : ${enable_dss}])
+AC_MSG_RESULT([dynamic_page_shift : ${enable_dynamic_page_shift}])
+AC_MSG_RESULT([lazy_lock          : ${enable_lazy_lock}])
+AC_MSG_RESULT([tls                : ${enable_tls}])
+AC_MSG_RESULT([===============================================================================])