Looser alignment checks. Closes #58.

test cases/common/45 alignment/meson.build

@@ -11,13 +11,18 @@ endif
 ptr_size = cc.sizeof('void*')
 dbl_alignment = cc.alignment('double')
 
-if host.name() == 'windows'
-  dbl_exp = 8
+# These tests are not thorough. Doing this properly
+# would take a lot of work because it is strongly
+# platform  and compiler dependent. So just check
+# that they produce something fairly sane.
+
+if ptr_size == 8 or ptr_size == 4
+  message('Size of ptr ok.')
 else
-  dbl_exp = ptr_size
+  error('Size of ptr misdetected.')
 endif
 
-if dbl_alignment == dbl_exp
+if dbl_alignment == 8 or dbl_alignment == 4
   message('Alignment of double ok.')
 else
   error('Alignment of double misdetected.')