Provide some default values for the ThinLTO Cache pruning
This control how the cache is pruned. The cache still has to
be explicitely enabled/disabled by providing a path.
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 268393
diff --git a/llvm/include/llvm-c/lto.h b/llvm/include/llvm-c/lto.h
index 82f7fd7..21a1ea4 100644
--- a/llvm/include/llvm-c/lto.h
+++ b/llvm/include/llvm-c/lto.h
@@ -659,6 +659,7 @@
/**
* Sets the path to a directory to use as a cache storage for incremental build.
+ * Setting this activates caching.
*
* \since LTO_API_VERSION=18
*/
@@ -667,7 +668,7 @@
/**
* Sets the cache pruning interval (in seconds). A negative value disable the
- * pruning (default).
+ * pruning. An unspecified default value will be applied.
*
* \since LTO_API_VERSION=18
*/
@@ -678,7 +679,8 @@
* Sets the maximum cache size that can be persistent across build, in terms of
* percentage of the available space on the the disk. Set to 100 to indicate
* no limit, 50 to indicate that the cache size will not be left over half the
- * available space. A value over 100 will be reduced to 100.
+ * available space. A value over 100 will be reduced to 100. An unspecified
+ * default value will be applied.
*
* The formula looks like:
* AvailableSpace = FreeSpace + ExistingCacheSize
@@ -690,7 +692,8 @@
thinlto_code_gen_t cg, unsigned percentage);
/**
- * Sets the expiration (in seconds) for an entry in the cache.
+ * Sets the expiration (in seconds) for an entry in the cache. An unspecified
+ * default value will be applied.
*
* \since LTO_API_VERSION=18
*/