[{"id":3673095,"web_url":"http://patchwork.ozlabs.org/comment/3673095/","msgid":"","list_archive_url":null,"date":"2026-04-03T12:18:23","subject":"Re: [Buildroot] [PATCH] package/bmap-writer: fix static link with\n libarchive","submitter":{"id":92564,"url":"http://patchwork.ozlabs.org/api/people/92564/","name":"Shubham Chakraborty","email":"chakrabortyshubham66@gmail.com"},"content":"Hi Ayoub,\n\nThat makes sense. I'll send this patch as a PR to the upstream repository\ninstead of submitting it to Buildroot.\n\nThanks for the direction.\n\nBest regards,\n\nShubham\n\nOn Fri, Apr 3, 2026 at 4:07 PM Ayoub Zaki wrote:\n\n> Hi,\n>\n> can you instead send a PR to https://github.com/embetrix/bmap-write\n> project instead of Buildroot ?\n>\n> it's always better to fix upstream\n>\n>\n> On 4/3/26 12:20, Shubham Chakraborty wrote:\n> > Use a package patch to switch bmap-writer from CMake's\n> > FindLibArchive module to pkg-config for libarchive.\n> >\n> > In static Buildroot builds, FindLibArchive only links\n> > libarchive itself. That drops libarchive's private\n> > dependencies from the final link command and causes\n> > undefined references to compression backends such as\n> > zlib, bzip2, lz4, liblzma and zstd.\n> >\n> > Signed-off-by: Shubham Chakraborty \n> > ---\n> > ...ts.txt-use-pkg-config-for-libarchive.patch | 49 +++++++++++++++++++\n> > 1 file changed, 49 insertions(+)\n> > create mode 100644\n> package/bmap-writer/0001-CMakeLists.txt-use-pkg-config-for-libarchive.patch\n> >\n> > diff --git\n> a/package/bmap-writer/0001-CMakeLists.txt-use-pkg-config-for-libarchive.patch\n> b/package/bmap-writer/0001-CMakeLists.txt-use-pkg-config-for-libarchive.patch\n> > new file mode 100644\n> > index 0000000000..bb2df1224b\n> > --- /dev/null\n> > +++\n> b/package/bmap-writer/0001-CMakeLists.txt-use-pkg-config-for-libarchive.patch\n> > @@ -0,0 +1,49 @@\n> > +From 5931b090c7ebe61a1bbc9a3e3c58edae5e90d71b Mon Sep 17 00:00:00 2001\n> > +From: Shubham Chakraborty \n> > +Date: Fri, 3 Apr 2026 14:33:19 +0530\n> > +Subject: [PATCH] CMakeLists.txt: use pkg-config for libarchive\n> > +\n> > +CMake's FindLibArchive module only passes libarchive itself to the\n> > +final link command.\n> > +\n> > +In static Buildroot builds that is not enough, because libarchive.a\n> > +also needs its private compression backend dependencies such as zlib,\n> > +bzip2, lz4, liblzma and zstd.\n> > +\n> > +Switch libarchive discovery to pkg-config so the link command includes\n> > +the full static dependency list instead of just libarchive.\n> > +---\n> > + CMakeLists.txt | 10 +++++-----\n> > + 1 file changed, 5 insertions(+), 5 deletions(-)\n> > +\n> > +diff --git a/CMakeLists.txt b/CMakeLists.txt\n> > +index 787fc69..086b127 100644\n> > +--- a/CMakeLists.txt\n> > ++++ b/CMakeLists.txt\n> > +@@ -19,10 +19,10 @@ else()\n> > + endif()\n> > +\n> > +\n> > +-# Find libarchive\n> > +-find_package(LibArchive REQUIRED)\n> > +-if (LibArchive_FOUND)\n> > +- include_directories(${LIBARCHIVE_INCLUDE_DIR})\n> > ++# Find libarchive via pkg-config so static builds pull in private libs\n> too.\n> > ++pkg_check_modules(LIBARCHIVE REQUIRED libarchive)\n> > ++if (LIBARCHIVE_FOUND)\n> > ++ include_directories(${LIBARCHIVE_INCLUDE_DIRS})\n> > + else()\n> > + message(FATAL_ERROR \"libarchive not found\")\n> > + endif()\n> > +@@ -47,7 +47,7 @@ add_executable(bmap-writer bmap-writer.cpp sha256.cpp)\n> > + target_compile_options(bmap-writer PUBLIC -Wformat -Wformat-security\n> -Wconversion -Wsign-conversion -pedantic -Werror)\n> > +\n> > + # Link the libraries\n> > +-target_link_libraries(bmap-writer ${TINYXML2_LIBRARIES}\n> ${LibArchive_LIBRARIES})\n> > ++target_link_libraries(bmap-writer ${TINYXML2_LIBRARIES}\n> ${LIBARCHIVE_LIBRARIES})\n> > +\n> > + # Specify the install rules\n> > + install(TARGETS bmap-writer DESTINATION bin)\n> > +--\n> > +2.53.0\n> > +\n>\n> Mit freundlichen Grüßen / Kind regards\n>\n> --\n> Ayoub Zaki\n> Embedded Systems Consultant\n>\n> Vaihinger Straße 2/1\n> D-71634 Ludwigsburg\n>\n> Mobile : +4917662901545\n> Email : ayoub.zaki@embetrix.com\n> Homepage : https://embetrix.com\n> VAT No. : DE313902634\n>\n>","headers":{"Return-Path":"","X-Original-To":["incoming-buildroot@patchwork.ozlabs.org","buildroot@buildroot.org"],"Delivered-To":["patchwork-incoming-buildroot@legolas.ozlabs.org","buildroot@buildroot.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=buildroot.org header.i=@buildroot.org\n header.a=rsa-sha256 header.s=default header.b=oDUJRhay;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=buildroot.org\n (client-ip=140.211.166.137; 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