From: Simon Kuenzer <simon@unikraft.io>
Date: Fri, 11 Aug 2023 13:09:24 +0000 (+0200)
Subject: build: Explain OPTIMIZE_PIE
X-Git-Tag: RELEASE-0.14.0~49
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=2ee5283ff8f6fc4139b3ad5fe841e554bfca1b22;p=unikraft%2Funikraft.git

build: Explain OPTIMIZE_PIE

Adds an explanation for the OPTIMIZE_PIE configuration option.

Signed-off-by: Simon Kuenzer <simon@unikraft.io>
Reviewed-by: Sergiu Moga <sergiu@unikraft.io>
Approved-by: Razvan Deaconescu <razvand@unikraft.io>
Tested-by: Unikraft CI <monkey@unikraft.io>
GitHub-Closes: #1038
---

diff --git a/Config.uk b/Config.uk
index 3cedd3a5a..c27af5711 100644
--- a/Config.uk
+++ b/Config.uk
@@ -100,10 +100,14 @@ config OPTIMIZE_LTO
 		Unikraft binaries.
 
 config OPTIMIZE_PIE
-	bool "Build the Unikernel as a static PIE"
+	bool "Static-PIE - Position-independent binary"
 	select LIBUKRELOC
+	default n
 	help
-		Build the Unikernel as a static PIE.
+		Creates a position independent binary. Such a Unikernel binary does
+		not have to be placed at a fixed location in the virtual address
+		space by a loader. Some loaders even assume that kernel entrance is
+		relocatable (e.g., EFI).
 
 choice
 	prompt "Debug information level"