Add a comment about why there's no is_pie setting.

2018-04-17 09:36:39 -07:00
parent 635d14c251
commit e2f6705e28
1 changed files with 3 additions and 0 deletions
--- a/lib/codegen/meta/base/settings.py
+++ b/lib/codegen/meta/base/settings.py
@@ -29,6 +29,9 @@ enable_verifier = BoolSetting(

 is_64bit = BoolSetting("Enable 64-bit code generation")

+# Note that Cretonne doesn't currently need an is_pie flag, because PIE is just
+# PIC where symbols can't be pre-empted, which can be expressed with the
+# `colocated` flag on external functions and global variables.
 is_pic = BoolSetting("Enable Position-Independent Code generation")

 return_at_end = BoolSetting(