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Diffstat (limited to 'm4/tuklib_physmem.m4')
| -rw-r--r-- | m4/tuklib_physmem.m4 | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/m4/tuklib_physmem.m4 b/m4/tuklib_physmem.m4 new file mode 100644 index 0000000..5931785 --- /dev/null +++ b/m4/tuklib_physmem.m4 @@ -0,0 +1,211 @@ +# +# 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 |