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Re: Ubuntu 18.04 fails to build bison 3.7

From: Akim Demaille
Subject: Re: Ubuntu 18.04 fails to build bison 3.7
Date: Sat, 1 Aug 2020 19:37:16 +0200

Hi Arnold,

> Le 26 juil. 2020 à 12:53, Arnold Robbins <arnold@skeeve.com> a écrit :
>  CCLD     src/bison
> src/bison-complain.o: In function `warnings_print_categories':
> /usr/local/src/Gnu/bison-3.7/src/complain.c:457: undefined reference to 
> `ostream_printf'
> src/bison-complain.o: In function `end_hyperlink':
> /usr/local/src/Gnu/bison-3.7/src/complain.c:117: undefined reference to 
> `styled_ostream_set_hyperlink'
> src/bison-complain.o: In function `begin_hyperlink':
> /usr/local/src/Gnu/bison-3.7/src/complain.c:110: undefined reference to 
> `styled_ostream_set_hyperlink'
> collect2: error: ld returned 1 exit status
> Makefile:4327: recipe for target 'src/bison' failed
> make: *** [src/bison] Error 1

I'm about to push the following patch, once the CI validates it.  I hope I can 
release 3.7.1 tomorrow.

Thanks for the report!

commit ba1834f9a8bdc6f5a9ee4dcd95650cd759d36e4b
Author: Akim Demaille <akim.demaille@gmail.com>
Date:   Sun Jul 26 18:00:15 2020 +0200

    libtextstyle: be sure to have ostream_printf and hyperlink support
    Older versions of libtextstyle do not support them, rule them out.
    Reported by Lars Wendler
    and by Arnold Robbins
    https://lists.gnu.org/r/bug-bison/2020-07/msg00041.html and
    With support from Bruno Haible in gnulib
    thread starting at
    * configure.ac: Require libtextstyle 0.20.5.
    * gnulib: Update.

diff --git a/NEWS b/NEWS
index cf79ac1e..717ff8a9 100644
--- a/NEWS
+++ b/NEWS
@@ -4,7 +4,9 @@ GNU Bison NEWS
 ** Bug fixes
-  Fixed a crash when a token alias contains a NUL byte.
+  Crash when a token alias contains a NUL byte.
+  Portability issues with libtextstyle.
 ** Changes
diff --git a/README b/README
index 489caa70..118dc31b 100644
--- a/README
+++ b/README
@@ -42,9 +42,11 @@ installing it.  In that case, do not use `src/bison`: it 
would use the
 As an experimental feature, diagnostics are now colored, controlled by the
 `--color` and `--style` options.
-To use them, install the libtextstyle library before configuring Bison.  It
-is available from https://alpha.gnu.org/gnu/gettext/, for instance
+To use them, install the libtextstyle library, 0.20.5 or newer, before
+configuring Bison.  It is available from https://alpha.gnu.org/gnu/gettext/,
+for instance https://alpha.gnu.org/gnu/gettext/libtextstyle-0.20.5.tar.gz,
+or as part of Gettext 0.21 or newer, for instance
 The option --color supports the following arguments:
 - always, yes: Enable colors.
diff --git a/THANKS b/THANKS
index 5c64da3c..a97f2b03 100644
--- a/THANKS
+++ b/THANKS
@@ -106,6 +106,7 @@ Keith Browne              kbrowne@legato.com
 Ken Moffat                zarniwhoop@ntlworld.com
 Kiyoshi Kanazawa          yoi_no_myoujou@yahoo.co.jp
 Lars Maier                lars.maier@tefax.net
+Lars Wendler              polynomial-c@gentoo.org
 László Várady             laszlo.varady93@gmail.com
 Laurent Mascherpa         laurent.mascherpa@epita.fr
 Lie Yan                   lie.yan@kaust.edu.sa
diff --git a/configure.ac b/configure.ac
index c5750a6d..4993a2c6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -60,6 +60,9 @@ AC_PROG_CXX
 # Gnulib (early checks).
+# We want ostream_printf and hyperlink support.
 # Gnulib uses '#pragma GCC diagnostic push' to silence some
 # warnings, but older gcc doesn't support this.
 AC_CACHE_CHECK([whether pragma GCC diagnostic push works],
diff --git a/gnulib b/gnulib
index ac34618e..c6e65c2e 160000
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit ac34618e85013bfec4650f02e8e79c5de6d80fb3
+Subproject commit c6e65c2e9fc89cc1a3b743d370f69d222fbdb6bb
diff --git a/lib/.gitignore b/lib/.gitignore
index 7f9045d4..758edcc0 100644
--- a/lib/.gitignore
+++ b/lib/.gitignore
@@ -192,8 +192,6 @@
diff --git a/m4/.gitignore b/m4/.gitignore
index cca78f48..9bc07270 100644
--- a/m4/.gitignore
+++ b/m4/.gitignore
@@ -67,7 +67,6 @@
@@ -97,7 +96,6 @@
@@ -117,6 +115,7 @@

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