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Tue, 17 Jun 2025 08:09:10 -0700 (PDT) MIME-Version: 1.0 References: <30d81f2c-a2ce-47b6-b999-fb6f09f1c026@efficios.com> In-Reply-To: <30d81f2c-a2ce-47b6-b999-fb6f09f1c026@efficios.com> Date: Tue, 17 Jun 2025 17:08:58 +0200 X-Gm-Features: AX0GCFvkGw9l-UNT5zUtWUTjLPxCxwMNYPWa7Pr2xlEI0JHB6lt6PgZ7s6rHIrI Message-ID: Subject: Re: lttng-tools-2.14.0-rc1: fails to compile with libxml2-2.14.4 To: Kienan Stewart Cc: lttng-dev Content-Type: text/plain; charset="UTF-8" X-BeenThere: lttng-dev@lists.lttng.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: LTTng development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Norbert Lange via lttng-dev Reply-To: Norbert Lange Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" Am Di., 17. Juni 2025 um 16:50 Uhr schrieb Kienan Stewart : > > Hi Norbert, > > On 6/17/25 10:15 AM, Norbert Lange via lttng-dev wrote: > > /tmp/dev_develop_libxml2/usr/include/libxml2/libxml/encoding.h:173:7: > > note: declared here > > 173 | } input XML_DEPRECATED_MEMBER; > > | ^~~~~ > > ../../../src/common/config/session-config.cpp:297:75: error: no match > > for call to '(_xmlCharEncodingHandler::) (xmlChar*&, > > int*, const xmlChar*, int*)' > > 297 | ret = handler->input(out_str, &out_len, (const xmlChar *) > > in_str, &in_len); > > | > > ^ > > > > Changing the call to handler->input.legacyFunc seems to fix it. > > > > Also lttng seems to need libxml2, but doesnt add the necessary flags. > > > > Regarding the "necessary flags" for libxml2 when building the lttng > binary, could you indicate clearly the error you have? > > All uses of libxml2 are via libconfig, and the libxml2 LD flags are > added to lttng via libconfig.la. > > When performing the final link of lttng, I see `-lxml2` in the command line. > > thanks, > kienan > > Regards, Norbert > The error is, that I don't see -lxml2 in the commandline (unless I use the global LDFLAGS), libconfig.la does not contain the flags either. However, the Makefiles all contain them: src/common/Makefile:libxml2_CFLAGS = -I/tmp/dev_develop_libxml2/usr/include/libxml2 src/common/Makefile:libxml2_LIBS = /tmp/dev_develop_libxml2/usr/local/lib/libxml2.so I dont use pkgconf, I set the variables directly (libxml2 is not a part of our production filesystem + compiler and right now I just barely managed to compile lttng somehow). Regards, Norbert