PR 10757

	* c-pch.c: Include target.h.  Improve comments.
	(struct c_pch_validity): Add target_data_length.
	(pch_init): Add target's validity data.
	(c_common_valid_pch): Check target's validity data.
	* target-def.h (TARGET_GET_PCH_VALIDITY): New.
	(TARGET_PCH_VALID_P): New.
	(TARGET_INITIALIZER): Add new fields.
	* target.h: Include tm.h.
	(struct gcc_target): Add get_pch_validity, pch_valid_p.
	* toplev.h (default_get_pch_validity): New prototype.
	(default_pch_valid_p): New prototype.
	* toplev.c (default_get_pch_validity): New routine.
	(default_pch_valid_p): New routine.
	* Makefile.in (TARGET_H): Add TM_H.  Replace all users of
	target.h with $(TARGET_H).
	(c-pch.o): Add TARGET_H.
	* doc/tm.texi (PCH Target): New node.
	(TARGET_GET_PCH_VALIDITY): Document.
	(TARGET_PCH_VALID_P): Document.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@72909 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 11 insertions, 0 deletions

diff --git a/gcc/target.h b/gcc/target.h
index 8d77dfde2d0..0b19445456a 100644
--- a/gcc/target.h
+++ b/gcc/target.h
@@ -44,6 +44,8 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    to gradually reduce the amount of conditional compilation that is
    scattered throughout GCC.  */
 
+#include "tm.h"
+
 struct gcc_target
 {
   /* Functions that output assembler for the target.  */
@@ -380,6 +382,15 @@ struct gcc_target
      delayed-branch scheduling.  */
   void (* machine_dependent_reorg) (void);
 
+  /* Validity-checking routines for PCH files, target-specific.
+     get_pch_validity returns a pointer to the data to be stored,
+     and stores the size in its argument.  pch_valid_p gets the same
+     information back and returns NULL if the PCH is valid,
+     or an error message if not.
+  */
+  void * (* get_pch_validity) (size_t *);
+  const char * (* pch_valid_p) (const void *, size_t);
+
   /* Leave the boolean fields at the end.  */
 
   /* True if arbitrary sections are supported.  */