From: Ronan Loftus <rlf42@posteo.net>
To: buildroot@buildroot.org
Cc: Ronan Loftus <rlf42@posteo.net>
Subject: [Buildroot] [PATCH 1/1] package/readline: propagate CONF_OPTS to host build
Date: Sun, 19 Jul 2026 03:16:04 +0000 [thread overview]
Message-ID: <20260719031547.3512747-1-rlf42@posteo.net> (raw)
--with-shared-termcap-library is only applied to the target readline
because CONF_OPTS is not inherited by the host variant. The resulting
host libreadline.so.8 has no DT_NEEDED on ncurses/tinfo, leaving
termcap symbols (UP, BC, tgetent, ...) unresolved.
With recent binutils (--no-copy-dt-needed-entries), any process
loading this libreadline via LD_LIBRARY_PATH fails at startup. This
breaks fakeroot-based rootfs generation when host-gdb (which pulls
host-readline) is selected:
/bin/sh: symbol lookup error: .../host/lib/libreadline.so.8:
undefined symbol: UP
Reproduced on Arch Linux (gcc 16.1.1, binutils 2.46.1).
Signed-off-by: Ronan Loftus <rlf42@posteo.net>
---
package/readline/readline.mk | 1 +
1 file changed, 1 insertion(+)
diff --git a/package/readline/readline.mk b/package/readline/readline.mk
index f69cbe45..8c49fab8 100644
--- a/package/readline/readline.mk
+++ b/package/readline/readline.mk
@@ -15,6 +15,7 @@ READLINE_CONF_OPTS = \
--disable-install-examples \
--with-curses \
--with-shared-termcap-library
+HOST_READLINE_CONF_OPTS = $(READLINE_CONF_OPTS)
READLINE_LICENSE = GPL-3.0+
READLINE_LICENSE_FILES = COPYING
READLINE_CPE_ID_VENDOR = gnu
--
2.55.0
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