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From: Ngie Cooper <ngie@FreeBSD.org>
Date: Sun, 22 Oct 2017 07:20:11 +0000 (UTC)
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Subject: svn commit: r324849 - projects/runtime-coverage/tools/build/options
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Author: ngie
Date: Sun Oct 22 07:20:11 2017
New Revision: 324849
URL: https://svnweb.freebsd.org/changeset/base/324849

Log:
  Add more draft text to WITH_COVERAGE

Modified:
  projects/runtime-coverage/tools/build/options/WITH_COVERAGE

Modified: projects/runtime-coverage/tools/build/options/WITH_COVERAGE
==============================================================================
--- projects/runtime-coverage/tools/build/options/WITH_COVERAGE	Sun Oct 22 07:16:35 2017	(r324848)
+++ projects/runtime-coverage/tools/build/options/WITH_COVERAGE	Sun Oct 22 07:20:11 2017	(r324849)
@@ -3,3 +3,15 @@ Set to build profiled libraries for use with
 .Xr gcov 1 ,
 .Xr lcov 1 ,
 etc.
+.Em Warning:
+this option is experimental.
+Profiled libraries and binaries with runtime instrumentation built in will
+consume large amounts of disk space (somewhere on the order of several
+gigabytes).
+.\" TODO: put this in build(7)?
+GCDA files are installed to the
+.Pa /usr/lib/cov
+prefix.
+.\" TODO: verify this claim in an e2e test.
+The install directory mirrors the install path for the object directory, e.g.,
+.Pa /usr/lib/cov/usr/obj/lib/libc/stdio/vfprintf.gcda