From 8a5fe775294ede43387a38ef04a707cd1e2f9801 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Thu, 14 Oct 2021 09:38:36 +0100
Subject: [PATCH] sys-libs/readline: avoid underlinking libreadline in prefix
 bootstrap

There's no guarantee we have pkg-config around super early
on in the process and we need readline for bash.

Closes: https://bugs.gentoo.org/818103
Signed-off-by: Sam James <sam@gentoo.org>
---
 sys-libs/readline/readline-8.1_p1-r1.ebuild | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/sys-libs/readline/readline-8.1_p1-r1.ebuild b/sys-libs/readline/readline-8.1_p1-r1.ebuild
index 89f31e17eb100..d635224467515 100644
--- a/sys-libs/readline/readline-8.1_p1-r1.ebuild
+++ b/sys-libs/readline/readline-8.1_p1-r1.ebuild
@@ -70,9 +70,24 @@ src_prepare() {
 	[[ ${PLEVEL} -gt 0 ]] && eapply -p0 $(patches -s)
 	default
 
-	# Force ncurses linking. #71420
-	# Use pkg-config to get the right values. #457558
-	local ncurses_libs=$($(tc-getPKG_CONFIG) ncurses$(usex unicode w '') --libs)
+	if use prefix && [[ ! -e "${BROOT}"/usr/bin/pkg-config ]] ; then
+		# If we're bootstrapping, make a guess. We don't have pkg-config
+		# around yet. bug #818103.
+		# Incorrectly populating this leads to underlinked libreadline.
+		local ncurses_libs
+		local ncurses_libs_suffix=$(usex unicode w '')
+
+		ncurses_libs="-lncurses${ncurses_libs_suffix}"
+
+		if has_version "sys-libs/ncurses[tinfo(+)]" ; then
+			ncurses_libs+=" -ltinfo${ncurses_libs_suffix}"
+		fi
+	else
+		# Force ncurses linking. #71420
+		# Use pkg-config to get the right values. #457558
+		local ncurses_libs=$($(tc-getPKG_CONFIG) ncurses$(usex unicode w '') --libs)
+	fi
+
 	sed -i \
 		-e "/^SHLIB_LIBS=/s:=.*:='${ncurses_libs}':" \
 		support/shobj-conf || die