From 5613c37e6698299aef72ea0fdc927bf7d1d9c312 Mon Sep 17 00:00:00 2001
From: Augustin Cavalier <waddlesplash@gmail.com>
Date: Thu, 29 Sep 2022 10:09:00 -0400
Subject: [PATCH] BootRules: Add -fvisibility=hidden to BootStaticLibrary as
 well.

Does not seem to affect the size of the bios_ia32 loader,
but takes the x86_64 EFI loader down from 678k -> 554k.
---
 build/jam/BootRules | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/build/jam/BootRules b/build/jam/BootRules
index b5c26562a4..edbabcfafa 100644
--- a/build/jam/BootRules
+++ b/build/jam/BootRules
@@ -182,13 +182,19 @@ rule BootMergeObject
 
 rule BootStaticLibrary
 {
-	# Usage BootStaticLibrary <name> : <sources> : <extra cc flags> ;
+	# BootStaticLibrary <name> : <sources> : <extra cc flags> ;
 	# This is designed to take a set of sources and libraries and create
-	# a file called lib<name>.a
+	# a static library.
+	local extraFlags = $(3) ;
 
 	TARGET_PACKAGING_ARCH on $(1) = $(TARGET_KERNEL_ARCH) ;
 
-	SetupBoot $(2) : $(3) : false ;
+	if $(TARGET_CC_IS_LEGACY_GCC_$(TARGET_KERNEL_ARCH)) = 0
+			&& [ on $(1) return $(NO_HIDDEN_VISIBILITY) ] != 1 {
+		extraFlags += -fvisibility=hidden ;
+	}
+
+	SetupBoot $(2) : $(extraFlags) : false ;
 	Library $(1) : $(2) ;
 }