Add an unpatched version of xz, XZ Utils, to /trunk/deps/third_party

xz/m4/tuklib_physmem.m4

+#
+# SYNOPSIS
+#
+#   TUKLIB_PHYSMEM
+#
+# DESCRIPTION
+#
+#   Check how to get the amount of physical memory.
+#   This information is used in tuklib_physmem.c.
+#
+#   Supported methods:
+#
+#     - Windows (including Cygwin), OS/2, DJGPP (DOS), and OpenVMS have
+#       operating-system specific functions.
+#
+#     - AIX has _system_configuration.physmem.
+#
+#     - sysconf() works on GNU/Linux and Solaris, and possibly on
+#       some BSDs.
+#
+#     - BSDs use sysctl().
+#
+#     - Tru64 uses getsysinfo().
+#
+#     - HP-UX uses pstat_getstatic().
+#
+#     - IRIX has setinvent_r(), getinvent_r(), and endinvent_r().
+#
+#     - sysinfo() works on Linux/dietlibc and probably on other Linux
+#       systems whose libc may lack sysconf().
+#
+# COPYING
+#
+#   Author: Lasse Collin
+#
+#   This file has been put into the public domain.
+#   You can do whatever you want with this file.
+#
+
+AC_DEFUN_ONCE([TUKLIB_PHYSMEM], [
+AC_REQUIRE([TUKLIB_COMMON])
+
+# sys/param.h might be needed by sys/sysctl.h.
+AC_CHECK_HEADERS([sys/param.h])
+
+AC_CACHE_CHECK([how to detect the amount of physical memory],
+        [tuklib_cv_physmem_method], [
+
+# Maybe checking $host_os would be enough but this matches what
+# tuklib_physmem.c does.
+#
+# NOTE: IRIX has a compiler that doesn't error out with #error, so use
+# a non-compilable text instead of #error to generate an error.
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#if defined(_WIN32) || defined(__CYGWIN__) || defined(__OS2__) \
+                || defined(__DJGPP__) || defined(__VMS)
+int main(void) { return 0; }
+#else
+compile error
+#endif
+]])], [tuklib_cv_physmem_method=special], [
+
+# Look for AIX-specific solution before sysconf(), because the test
+# for sysconf() will pass on AIX but won't actually work
+# (sysconf(_SC_PHYS_PAGES) compiles but always returns -1 on AIX).
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#include <sys/systemcfg.h>
+
+int
+main(void)
+{
+        (void)_system_configuration.physmem;
+        return 0;
+}
+]])], [tuklib_cv_physmem_method=aix], [
+
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#include <unistd.h>
+int
+main(void)
+{
+        long i;
+        i = sysconf(_SC_PAGESIZE);
+        i = sysconf(_SC_PHYS_PAGES);
+        return 0;
+}
+]])], [tuklib_cv_physmem_method=sysconf], [
+
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#include <sys/types.h>
+#ifdef HAVE_SYS_PARAM_H
+#       include <sys/param.h>
+#endif
+#include <sys/sysctl.h>
+int
+main(void)
+{
+        int name[2] = { CTL_HW, HW_PHYSMEM };
+        unsigned long mem;
+        size_t mem_ptr_size = sizeof(mem);
+        sysctl(name, 2, &mem, &mem_ptr_size, NULL, 0);
+        return 0;
+}
+]])], [tuklib_cv_physmem_method=sysctl], [
+
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#include <sys/sysinfo.h>
+#include <machine/hal_sysinfo.h>
+
+int
+main(void)
+{
+        int memkb;
+        int start = 0;
+        getsysinfo(GSI_PHYSMEM, (caddr_t)&memkb, sizeof(memkb), &start);
+        return 0;
+}
+]])], [tuklib_cv_physmem_method=getsysinfo],[
+
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#include <sys/param.h>
+#include <sys/pstat.h>
+
+int
+main(void)
+{
+        struct pst_static pst;
+        pstat_getstatic(&pst, sizeof(pst), 1, 0);
+        (void)pst.physical_memory;
+        (void)pst.page_size;
+        return 0;
+}
+]])], [tuklib_cv_physmem_method=pstat_getstatic],[
+
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#include <invent.h>
+int
+main(void)
+{
+        inv_state_t *st = NULL;
+        setinvent_r(&st);
+        getinvent_r(st);
+        endinvent_r(st);
+        return 0;
+}
+]])], [tuklib_cv_physmem_method=getinvent_r], [
+
+# This version of sysinfo() is Linux-specific. Some non-Linux systems have
+# different sysinfo() so we must check $host_os.
+case $host_os in
+        linux*)
+                AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#include <sys/sysinfo.h>
+int
+main(void)
+{
+        struct sysinfo si;
+        sysinfo(&si);
+        return 0;
+}
+                ]])], [
+                        tuklib_cv_physmem_method=sysinfo
+                ], [
+                        tuklib_cv_physmem_method=unknown
+                ])
+                ;;
+        *)
+                tuklib_cv_physmem_method=unknown
+                ;;
+esac
+])])])])])])])])
+
+case $tuklib_cv_physmem_method in
+        aix)
+                AC_DEFINE([TUKLIB_PHYSMEM_AIX], [1],
+                        [Define to 1 if the amount of physical memory
+                        can be detected with _system_configuration.physmem.])
+                ;;
+        sysconf)
+                AC_DEFINE([TUKLIB_PHYSMEM_SYSCONF], [1],
+                        [Define to 1 if the amount of physical memory can
+                        be detected with sysconf(_SC_PAGESIZE) and
+                        sysconf(_SC_PHYS_PAGES).])
+                ;;
+        sysctl)
+                AC_DEFINE([TUKLIB_PHYSMEM_SYSCTL], [1],
+                        [Define to 1 if the amount of physical memory can
+                        be detected with sysctl().])
+                ;;
+        getsysinfo)
+                AC_DEFINE([TUKLIB_PHYSMEM_GETSYSINFO], [1],
+                        [Define to 1 if the amount of physical memory can
+                        be detected with getsysinfo().])
+                ;;
+        pstat_getstatic)
+                AC_DEFINE([TUKLIB_PHYSMEM_PSTAT_GETSTATIC], [1],
+                        [Define to 1 if the amount of physical memory can
+                        be detected with pstat_getstatic().])
+                ;;
+        getinvent_r)
+                AC_DEFINE([TUKLIB_PHYSMEM_GETINVENT_R], [1],
+                        [Define to 1 if the amount of physical memory
+                        can be detected with getinvent_r().])
+                ;;
+        sysinfo)
+                AC_DEFINE([TUKLIB_PHYSMEM_SYSINFO], [1],
+                        [Define to 1 if the amount of physical memory
+                        can be detected with Linux sysinfo().])
+                ;;
+esac
+])dnl