Re: [Buildroot] libreadline undefined symbol error when generating rootfs tarball

From: Peter Seiderer via buildroot <buildroot@buildroot.org>
To: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Buildroot Development <buildroot@buildroot.org>
Subject: Re: [Buildroot] libreadline undefined symbol error when generating rootfs tarball
Date: Thu, 18 Sep 2025 08:52:31 +0200	[thread overview]
Message-ID: <20250918085231.0a1a6c88@pc-1> (raw)
In-Reply-To: <9e835e4d-95bc-4b08-b5c5-65b4876a59bf@gmail.com>

On Thu, 18 Sep 2025 07:28:05 +0700, Bagas Sanjaya <bagasdotme@gmail.com> wrote:

> On 9/17/25 22:20, Peter Seiderer wrote:
> > On Wed, 17 Sep 2025 12:20:22 +0700, Bagas Sanjaya <bagasdotme@gmail.com> wrote:
> >   
> >> On Tue, Sep 16, 2025 at 08:42:17AM +0200, Peter Seiderer wrote:  
> >>> The following patch fixed the problem for me:
> >>>
> >>> diff --git a/package/readline/readline.mk b/package/readline/readline.mk
> >>> index f69cbe45e2..078607a0c5 100644
> >>> --- a/package/readline/readline.mk
> >>> +++ b/package/readline/readline.mk
> >>> @@ -15,6 +15,10 @@ READLINE_CONF_OPTS = \
> >>>   	--disable-install-examples \
> >>>   	--with-curses \
> >>>   	--with-shared-termcap-library
> >>> +HOST_READLINE_CONF_OPTS = \
> >>> +	--disable-install-examples \
> >>> +	--with-curses \
> >>> +	--with-shared-termcap-library
> >>>   READLINE_LICENSE = GPL-3.0+
> >>>   READLINE_LICENSE_FILES = COPYING
> >>>   READLINE_CPE_ID_VENDOR = gnu  
> >>
> >> Applying your patch, I get another build error (this time on gdb):
> >>
> >> ```
> >>    CXX    init.o
> >>    CXXLD  gdb
> >> /usr/bin/ld: /home/bagas/repo/buildroot/output/host/lib/libreadline.so: undefined reference to `tgoto@NCURSES6_TINFO_5.0.19991023'
> >> /usr/bin/ld: /home/bagas/repo/buildroot/output/host/lib/libreadline.so: undefined reference to `UP@NCURSES6_TINFO_5.0.19991023'
> >> /usr/bin/ld: /home/bagas/repo/buildroot/output/host/lib/libreadline.so: undefined reference to `tgetent@NCURSES6_TINFO_5.0.19991023'
> >> /usr/bin/ld: /home/bagas/repo/buildroot/output/host/lib/libreadline.so: undefined reference to `tgetnum@NCURSES6_TINFO_5.0.19991023'
> >> /usr/bin/ld: /home/bagas/repo/buildroot/output/host/lib/libreadline.so: undefined reference to `PC@NCURSES6_TINFO_5.0.19991023'
> >> /usr/bin/ld: /home/bagas/repo/buildroot/output/host/lib/libreadline.so: undefined reference to `tgetstr@NCURSES6_TINFO_5.0.19991023'
> >> /usr/bin/ld: /home/bagas/repo/buildroot/output/host/lib/libreadline.so: undefined reference to `tgetflag@NCURSES6_TINFO_5.0.19991023'
> >> /usr/bin/ld: /home/bagas/repo/buildroot/output/host/lib/libreadline.so: undefined reference to `BC@NCURSES6_TINFO_5.0.19991023'
> >> /usr/bin/ld: /home/bagas/repo/buildroot/output/host/lib/libreadline.so: undefined reference to `tputs@NCURSES6_TINFO_5.0.19991023'
> >> collect2: error: ld returned 1 exit status
> >> make[3]: *** [Makefile:2232: gdb] Error 1
> >> ```
> >>
> >> Thanks.
> >>     
> > 
> > Sorry, could not reproduce your failure...., did you make a complete
> > 
> > 	$ make clean
> > 	$ make
> > 
> > re-build after applying the patch/change?
> >   
> 
> I can still reproduce the issue, unfortunately.
> 
> (FYI: I encountered this on host-gdb.)

One last try, does your buildroot git souce tree already contain this (recent) commmit?

	From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
	Date: Fri, 29 Aug 2025 17:24:39 +0200
	Subject: [PATCH] package/gdb: really fix build with GCC 15.x by using externalreadline

	https://gitlab.com/buildroot.org/buildroot/-/commit/d98e15a3639d9758ab3223f0a6de3a94d506e6fa.patch

Regards,
Peter

> 
> Thanks.
> 

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