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-rw-r--r--gcc/doc/hostconfig.texi7
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/doc/hostconfig.texi b/gcc/doc/hostconfig.texi
index c97b41b..a016e56 100644
--- a/gcc/doc/hostconfig.texi
+++ b/gcc/doc/hostconfig.texi
@@ -71,6 +71,13 @@ indicate an out-of-date PCH file (built by some other GCC executable),
and such a PCH file won't work.
@end deftypefn
+@deftypefn {Host Hook} size_t HOST_HOOKS_GT_PCH_ALLOC_GRANULARITY (void);
+This host hook returns the alignment required for allocating virtual
+memory. Usually this is the same as getpagesize, but on some hosts the
+alignment for reserving memory differs from the pagesize for committing
+memory.
+@end deftypefn
+
@node Filesystem
@section Host Filesystem
@cindex configuration file