1# 2# SYNOPSIS 3# 4# TUKLIB_PHYSMEM 5# 6# DESCRIPTION 7# 8# Check how to get the amount of physical memory. 9# This information is used in tuklib_physmem.c. 10# 11# Supported methods: 12# 13# - Windows (including Cygwin), OS/2, DJGPP (DOS), and OpenVMS have 14# operating-system specific functions. 15# 16# - AIX has _system_configuration.physmem. 17# 18# - sysconf() works on GNU/Linux and Solaris, and possibly on 19# some BSDs. 20# 21# - BSDs use sysctl(). 22# 23# - Tru64 uses getsysinfo(). 24# 25# - HP-UX uses pstat_getstatic(). 26# 27# - IRIX has setinvent_r(), getinvent_r(), and endinvent_r(). 28# 29# - sysinfo() works on Linux/dietlibc and probably on other Linux 30# systems whose libc may lack sysconf(). 31# 32# COPYING 33# 34# Author: Lasse Collin 35# 36# This file has been put into the public domain. 37# You can do whatever you want with this file. 38# 39 40AC_DEFUN_ONCE([TUKLIB_PHYSMEM], [ 41AC_REQUIRE([TUKLIB_COMMON]) 42 43# sys/param.h might be needed by sys/sysctl.h. 44AC_CHECK_HEADERS([sys/param.h]) 45 46AC_CACHE_CHECK([how to detect the amount of physical memory], 47 [tuklib_cv_physmem_method], [ 48 49# Maybe checking $host_os would be enough but this matches what 50# tuklib_physmem.c does. 51# 52# NOTE: IRIX has a compiler that doesn't error out with #error, so use 53# a non-compilable text instead of #error to generate an error. 54AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ 55#if defined(_WIN32) || defined(__CYGWIN__) || defined(__OS2__) \ 56 || defined(__DJGPP__) || defined(__VMS) 57int main(void) { return 0; } 58#else 59compile error 60#endif 61]])], [tuklib_cv_physmem_method=special], [ 62 63# Look for AIX-specific solution before sysconf(), because the test 64# for sysconf() will pass on AIX but won't actually work 65# (sysconf(_SC_PHYS_PAGES) compiles but always returns -1 on AIX). 66AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ 67#include <sys/systemcfg.h> 68 69int 70main(void) 71{ 72 (void)_system_configuration.physmem; 73 return 0; 74} 75]])], [tuklib_cv_physmem_method=aix], [ 76 77AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ 78#include <unistd.h> 79int 80main(void) 81{ 82 long i; 83 i = sysconf(_SC_PAGESIZE); 84 i = sysconf(_SC_PHYS_PAGES); 85 return 0; 86} 87]])], [tuklib_cv_physmem_method=sysconf], [ 88 89AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ 90#include <sys/types.h> 91#ifdef HAVE_SYS_PARAM_H 92# include <sys/param.h> 93#endif 94#include <sys/sysctl.h> 95int 96main(void) 97{ 98 int name[2] = { CTL_HW, HW_PHYSMEM }; 99 unsigned long mem; 100 size_t mem_ptr_size = sizeof(mem); 101 sysctl(name, 2, &mem, &mem_ptr_size, NULL, 0); 102 return 0; 103} 104]])], [tuklib_cv_physmem_method=sysctl], [ 105 106AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ 107#include <sys/sysinfo.h> 108#include <machine/hal_sysinfo.h> 109 110int 111main(void) 112{ 113 int memkb; 114 int start = 0; 115 getsysinfo(GSI_PHYSMEM, (caddr_t)&memkb, sizeof(memkb), &start); 116 return 0; 117} 118]])], [tuklib_cv_physmem_method=getsysinfo],[ 119 120AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ 121#include <sys/param.h> 122#include <sys/pstat.h> 123 124int 125main(void) 126{ 127 struct pst_static pst; 128 pstat_getstatic(&pst, sizeof(pst), 1, 0); 129 (void)pst.physical_memory; 130 (void)pst.page_size; 131 return 0; 132} 133]])], [tuklib_cv_physmem_method=pstat_getstatic],[ 134 135AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ 136#include <invent.h> 137int 138main(void) 139{ 140 inv_state_t *st = NULL; 141 setinvent_r(&st); 142 getinvent_r(st); 143 endinvent_r(st); 144 return 0; 145} 146]])], [tuklib_cv_physmem_method=getinvent_r], [ 147 148# This version of sysinfo() is Linux-specific. Some non-Linux systems have 149# different sysinfo() so we must check $host_os. 150case $host_os in 151 linux*) 152 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ 153#include <sys/sysinfo.h> 154int 155main(void) 156{ 157 struct sysinfo si; 158 sysinfo(&si); 159 return 0; 160} 161 ]])], [ 162 tuklib_cv_physmem_method=sysinfo 163 ], [ 164 tuklib_cv_physmem_method=unknown 165 ]) 166 ;; 167 *) 168 tuklib_cv_physmem_method=unknown 169 ;; 170esac 171])])])])])])])]) 172 173case $tuklib_cv_physmem_method in 174 aix) 175 AC_DEFINE([TUKLIB_PHYSMEM_AIX], [1], 176 [Define to 1 if the amount of physical memory 177 can be detected with _system_configuration.physmem.]) 178 ;; 179 sysconf) 180 AC_DEFINE([TUKLIB_PHYSMEM_SYSCONF], [1], 181 [Define to 1 if the amount of physical memory can 182 be detected with sysconf(_SC_PAGESIZE) and 183 sysconf(_SC_PHYS_PAGES).]) 184 ;; 185 sysctl) 186 AC_DEFINE([TUKLIB_PHYSMEM_SYSCTL], [1], 187 [Define to 1 if the amount of physical memory can 188 be detected with sysctl().]) 189 ;; 190 getsysinfo) 191 AC_DEFINE([TUKLIB_PHYSMEM_GETSYSINFO], [1], 192 [Define to 1 if the amount of physical memory can 193 be detected with getsysinfo().]) 194 ;; 195 pstat_getstatic) 196 AC_DEFINE([TUKLIB_PHYSMEM_PSTAT_GETSTATIC], [1], 197 [Define to 1 if the amount of physical memory can 198 be detected with pstat_getstatic().]) 199 ;; 200 getinvent_r) 201 AC_DEFINE([TUKLIB_PHYSMEM_GETINVENT_R], [1], 202 [Define to 1 if the amount of physical memory 203 can be detected with getinvent_r().]) 204 ;; 205 sysinfo) 206 AC_DEFINE([TUKLIB_PHYSMEM_SYSINFO], [1], 207 [Define to 1 if the amount of physical memory 208 can be detected with Linux sysinfo().]) 209 ;; 210esac 211])dnl 212