Test for Linux-specific sysinfo() only on Linux systems.

Some other systems have sysinfo() with different semantics.

diff --git a/m4/lc_physmem.m4 b/m4/lc_physmem.m4
index 8633f4a..78be136 100644 (file)
--- a/m4/lc_physmem.m4
+++ b/m4/lc_physmem.m4
@@ -54,7 +54,11 @@ main(void)
                with sysctl().])
        AC_MSG_RESULT([sysctl])
 ], [
-AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+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)
@@ -63,12 +67,18 @@ main(void)
        sysinfo(&si);
        return 0;
 }
-]])], [
-       AC_DEFINE([HAVE_PHYSMEM_SYSINFO], [1],
-               [Define to 1 if the amount of physical memory can be detected
-               with sysinfo().])
-       AC_MSG_RESULT([sysinfo])
-], [
-       AC_MSG_RESULT([unknown])
-])])])
+               ]])], [
+                       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