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-rw-r--r--m4/tuklib_physmem.m4211
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diff --git a/m4/tuklib_physmem.m4 b/m4/tuklib_physmem.m4
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+#
+# 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), OpenVMS, AROS,
+# and QNX 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) \
+ || defined(AMIGA) || defined(__AROS__) || defined(__QNX__)
+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([[
+#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