summaryrefslogtreecommitdiff
path: root/Build/source/extra/xz-4.999.9beta/m4/lc_physmem.m4
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/extra/xz-4.999.9beta/m4/lc_physmem.m4')
-rw-r--r--Build/source/extra/xz-4.999.9beta/m4/lc_physmem.m484
1 files changed, 84 insertions, 0 deletions
diff --git a/Build/source/extra/xz-4.999.9beta/m4/lc_physmem.m4 b/Build/source/extra/xz-4.999.9beta/m4/lc_physmem.m4
new file mode 100644
index 00000000000..78be1362db2
--- /dev/null
+++ b/Build/source/extra/xz-4.999.9beta/m4/lc_physmem.m4
@@ -0,0 +1,84 @@
+dnl ###########################################################################
+dnl
+dnl lc_PHYSMEM - Check how to find out the amount of physical memory
+dnl
+dnl - sysconf() gives all the needed info on GNU+Linux and Solaris.
+dnl - BSDs use sysctl().
+dnl - sysinfo() works on Linux/dietlibc and probably on other Linux systems
+dnl whose libc may lack sysconf().
+dnl
+dnl ###########################################################################
+dnl
+dnl Author: Lasse Collin
+dnl
+dnl This file has been put into the public domain.
+dnl You can do whatever you want with this file.
+dnl
+dnl ###########################################################################
+AC_DEFUN([lc_PHYSMEM], [
+AC_MSG_CHECKING([how to detect the amount of physical memory])
+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;
+}
+]])], [
+ AC_DEFINE([HAVE_PHYSMEM_SYSCONF], [1],
+ [Define to 1 if the amount of physical memory can be detected
+ with sysconf(_SC_PAGESIZE) and sysconf(_SC_PHYS_PAGES).])
+ AC_MSG_RESULT([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, NULL);
+ return 0;
+}
+]])], [
+ AC_DEFINE([HAVE_PHYSMEM_SYSCTL], [1],
+ [Define to 1 if the amount of physical memory can be detected
+ with sysctl().])
+ AC_MSG_RESULT([sysctl])
+], [
+dnl sysinfo() is Linux-specific. Some non-Linux systems have
+dnl incompatible 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;
+}
+ ]])], [
+ AC_DEFINE([HAVE_PHYSMEM_SYSINFO], [1],
+ [Define to 1 if the amount of physical memory
+ can be detected with Linux sysinfo().])
+ AC_MSG_RESULT([sysinfo])
+ ], [
+ AC_MSG_RESULT([unknown])
+ ])
+ ;;
+ *)
+ AC_MSG_RESULT([unknown])
+ ;;
+esac
+])])
+])dnl lc_PHYSMEM