scripts: Document existing problems with the symbolizer build script.

pcc · pcc · commit 4e271c947cee · 2016-10-24T20:15:39.000Z
Reviewers: eugenis, vitalybuka Subscribers: llvm-commits, kubabrecka Differential Revision: https://reviews.llvm.org/D25846 llvm-svn: 285013
diff --git a/compiler-rt/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh b/compiler-rt/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh
@@ -18,6 +18,12 @@
 #
 # The script will modify the output directory which is given as the first
 # argument to the script.
+#
+# FIXME: We should really be using a simpler approach to building this object
+# file, and it should be available as a regular cmake rule. Conceptually, we
+# want to be doing "ld -r" followed by "objcopy -G" to create a relocatable
+# object file with only our entry points exposed. However, this does not work at
+# present, see PR30750.
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 SRC_DIR=$(readlink -f $SCRIPT_DIR/..)
