t/re/re_tests: Update comment

[perl5.git] / README.micro

diff --git a/README.micro b/README.micro
index 457778c..93859a0 100644 (file)
--- a/README.micro
+++ b/README.micro
@@ -4,13 +4,16 @@ on the other hand this means that interfaces between Perl and your
 operating system are left very -- minimal.
 
 All this is experimental.  If you don't know what to do with microperl
-you probably shouldn't.  Do not report bugs in microperl; fix the bugs.
+you probably shouldn't.  Please don't report bugs in microperl; fix the
+bugs.  (Bugs reports about microperl without fixes/patches are equivalent
+to wishlist requests - they won't be discarded, but they likely won't get
+worked on either, unless they chance to coincide with someone's personal itch)
 
 We assume ANSI C89 plus the following:
-- <stdlib.h>
+- <stddef.h>, <stdlib.h>
 - rename()
 - opendir(), readdir(), closedir() (via dirent.h)
-- memchr(), memcmp(), memcpy() (via string.h)
+- memchr(), memcmp(), memcpy(), memset() (via string.h)
 - (a safe) putenv() (via stdlib.h)
 - strtoul() (via stdlib.h)
 (grep for 'define' in uconfig.sh.)
@@ -20,8 +23,27 @@ If you are still reading this and you are itching to try out microperl:
 
        make -f Makefile.micro
 
+The defaults assume a little endian LP32 platform - ie long and pointers are
+32 bits, so sizeof(long) and sizeof(void *) are 4
+If your platform is little endian LP64 - ie long and pointers are 64 bits,
+sizeof(long) and sizeof(void *) are 8, then you first need to run
+
+       make -f Makefile.micro regen_uconfig64
+
+to generate a suitable uconfig.h
+
 If you make changes to uconfig.sh, run
 
        make -f Makefile.micro regen_uconfig
 
-to regenerate uconfig.h.
+to regenerate uconfig.h.  (or regen_uconfig64 if you're editing uconfig64.sh)
+
+
+If neither of the above default configs work on your platform, you might want
+to try
+
+       make -f Makefile.micro patch_uconfig
+
+*before* the "make -f Makefile.micro".  This tries to minimally patch
+the uconfig.sh using your *current* Perl so that your microperl has
+the correct basic types and sizes and byteorder.