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Fri, 13 Jan 2023 22:56:24 +0100 (CET) From: Bruno Haible To: Bjarni Ingi Gislason Cc: bug-gnulib@gnu.org Subject: Re: groff: error after update of gnulib, 13th January 2023 Date: Fri, 13 Jan 2023 22:56:24 +0100 Message-ID: <12509392.IdSKlfLAKj@nimes> In-Reply-To: References: <10435880.85pcf5A44T@nimes> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Received-SPF: none client-ip=81.169.146.163; envelope-from=bruno@clisp.org; helo=mo4-p00-ob.smtp.rzone.de X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: bug-gnulib@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gnulib discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnulib-bounces+normalperson=yhbt.net@gnu.org Sender: bug-gnulib-bounces+normalperson=yhbt.net@gnu.org Bjarni Ingi Gislason wrote: > 2) with the commit, the config.log contains > > GL_GENERATE_ERROR_H_FALSE='' > GL_GENERATE_ERROR_H_TRUE='#' > > and the Makefile contains > > lib/error.h: $(top_builddir)/config.status > rm -f $@ That's because you happen to do this build on a platform which already has /usr/include/error.h. On the other platforms error.h gets created in the build directory, from error.in.h. You cannot have a reliable build system if the same include file basename (here: "error.h") is used to denote two different .h files, one that declares error_at_line, and one which declares groff C++ classes. This will *never* be reliable, regardless how to attempt to arrange the -I options in the AM_CPPFLAGS. Bruno