* Makefile.in: Autogenerate some header files which provide magic numbers.

Force dependencies for files which depend on autogenerated headers to ensure
that they are always built.
* child_info.h (child_info): Add new fields to accommodate new magic number
header stuff.
* dcrt0.cc: Rely on "child_info_magic.h" to ensure that correct child_info
magic numbers are used.
(dll_crt0_1): Temporarily remove _cygwin_testing_magic test.
(_dll_crt0): Do more testing on magic numbers from fork_info structure.  Call
"multiple_cygwin_problem" where appropriate.
(multiple_cygwin_problem): Rename from multiple_cygwin_die.  Issue a warning or
die, as appropriate based on cygwin version/magic number mismatch.
* pinfo.cc (pinfo::exit): Don't attempt to dereference `this' if it doesn't
exist.  This can happen when a fatal error occurs early in process
initialization.
* shared.cc: Rely on "shared_info_magic.h" to accommodate that new magic number
header stuff.
(shared_info::initialize): Use new magic number stuff, for shared region.
(memory_init): Ditto, for mount table.
* shared_info.h: Accomodate new magic number stuff for shared region and mount
table.
* sigproc.cc: Rely on "child_info_magic.h" to accommodate new magic number
header stuff.
(init_child_info): Initialize new fields in child_info) to accomodate magic
numbers.
* winsup.h: Rename multiple_cygwin_die to multiple_cygwin_problem.
* include/cygwin/version.h: Define macros for manipulating version magic.
* cygmagic: New shell script for generating magic numbers.

1 files changed, 9 insertions, 1 deletions

diff --git a/winsup/cygwin/shared_info.h b/winsup/cygwin/shared_info.h
index 3b8bbe7e3..2d3055491 100644
--- a/winsup/cygwin/shared_info.h
+++ b/winsup/cygwin/shared_info.h
@@ -40,7 +40,9 @@ class mount_item
    scheme should be satisfactory for a long while yet.  */
 #define MAX_MOUNTS 30
 
-#define MOUNT_VERSION	27	// increment when mount table changes
+#define MOUNT_VERSION	27	// increment when mount table changes and
+#define MOUNT_VERSION_MAGIC CYGWIN_VERSION_MAGIC (MOUNT_MAGIC, MOUNT_VERSION)
+#define CURR_MOUNT_MAGIC 0xfe35
 
 class reg_key;
 class mount_info
@@ -128,6 +130,12 @@ public:
 /******** Shared Info ********/
 /* Data accessible to all tasks */
 
+#define SHARED_VERSION (unsigned)(cygwin_version.api_major << 8 | \
+				  cygwin_version.api_minor)
+#define SHARED_VERSION_MAGIC CYGWIN_VERSION_MAGIC (SHARED_MAGIC, SHARED_VERSION)
+
+#define CURR_SHARED_MAGIC 0x6f6e
+
 class shared_info
 {
   DWORD inited;