Hello, We have a similar issue in Ubuntu: https://bugs.launchpad.net/ubuntu/+source/rustc/+bug/2049904
To me this seems like a rust linking issue, the same C library compiled with cc, then linked against a C stub program links just fine for me. In comparison rustc tries to be annoyingly clever and calls `cc` to link with `-nodefaultlibs` and tries to manually provide all the required libraries, which makes it fail. The direct cause of the error is a library ordering issue, `-lc` should always come after all C static libs and object files in a link command, but it does not. It seems that meson doesn't pass `-Clink-arg=-lc` to `rustc` at all by default (which it probably shouldn't need to), and it's rustc itself that emits `-lc` at the wrong location. A workaround is as follows: ``` dep_libc = declare_dependency(link_args : '-lc') l = static_library( 'c_accessing_zlib', 'c_accessing_zlib.c', dependencies: [dep_zlib, dep_libc], ) ``` It is rather unweildly to read, but here's an example of an offending link invocation by rustc: ``` LC_ALL="C" PATH="/usr/lib/rustlib/aarch64-unknown-linux-gnu/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" VSLANG="1033" "cc" "/tmp/rustcqxuAcC/symbols.o" "prog.p/prog.prog.3a9e8efe5d7989d1-cgu.0.rcgu.o" "prog.p/prog.2valzr4aprd78wdd.rcgu.o" "-Wl,--as-needed" "-L" "." "-L" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libstd-3f505df5bf7b6973.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libpanic_unwind-f7bbfb2a4f0106ba.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libobject-799d4aa6228550fd.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libmemchr-817c1781430e6007.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libaddr2line-ad8936af23d8ece8.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libgimli-fa9ccab1157705c6.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/librustc_demangle-0f0344f8af442a24.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libstd_detect-f1d03073262366fd.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libhashbrown-d2b728fe429f73fd.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-78f4eeade0e7b3f3.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libminiz_oxide-386abc7d4431b549.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libadler-f2fbe97df215d47a.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libunwind-1b9c021e2652ca95.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libcfg_if-a31e7b8703ef1917.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/liblibc-67315dfc1c311b62.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/liballoc-6f13ad92e9ef28f1.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/librustc_std_workspace_core-4647df6db5bfc191.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libcore-7ca28360f44e13c1.rlib" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib/libcompiler_builtins-bda26fded9d4fbc7.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/usr/lib/rustlib/aarch64-unknown-linux-gnu/lib" "-o" "prog" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs" "libc_accessing_zlib.a" "-lz" ``` Which was produced by the following rustc invocation: ``` rustc -C linker=cc --color=always -C debug-assertions=yes -C overflow-checks=no --crate-type bin -g --crate-name prog --emit dep-info=prog.d --emit link=prog --out-dir prog.p -C metadata=prog@exe -Clink-arg=libc_accessing_zlib.a -Clink-arg=-lz -L. ../prog.rs ``` As a note, same issue repros on the latest nightly rustc also. Fixing rustc instead of meson is the real solution, but I don't think this should be holding up meson migrating, as such I am attaching a workaround patch similar to the one I have proposed for Ubuntu. Mate Kukri
diff -Nru meson-1.3.1/debian/changelog meson-1.3.1/debian/changelog --- meson-1.3.1/debian/changelog 2023-12-26 17:31:01.000000000 +0000 +++ meson-1.3.1/debian/changelog 2024-02-13 14:32:10.000000000 +0000 @@ -1,3 +1,11 @@ +meson (1.3.1-1.1) unstable; urgency=medium + + * Non-maintainer upload. + * d/p/lp2049904-workaround.patch: Add workaround for rustc emitting link + flags in the wrong order (LP: #2049904) (#1059223) + + -- Mate Kukri <mate.ku...@canonical.com> Tue, 13 Feb 2024 14:32:10 +0000 + meson (1.3.1-1) unstable; urgency=medium * New upstream release. diff -Nru meson-1.3.1/debian/control meson-1.3.1/debian/control --- meson-1.3.1/debian/control 2023-12-11 19:52:05.000000000 +0000 +++ meson-1.3.1/debian/control 2024-02-13 13:23:33.000000000 +0000 @@ -1,5 +1,6 @@ Source: meson -Maintainer: Jussi Pakkanen <jpakk...@gmail.com> +Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com> +XSBC-Original-Maintainer: Jussi Pakkanen <jpakk...@gmail.com> Section: devel Priority: optional Standards-Version: 4.6.2 diff -Nru meson-1.3.1/debian/patches/lp2049904-workaround.patch meson-1.3.1/debian/patches/lp2049904-workaround.patch --- meson-1.3.1/debian/patches/lp2049904-workaround.patch 1970-01-01 01:00:00.000000000 +0100 +++ meson-1.3.1/debian/patches/lp2049904-workaround.patch 2024-02-13 13:23:33.000000000 +0000 @@ -0,0 +1,28 @@ +Description: Workaround for LP: #2049904 autopkgtest failure + In `test cases/rust/13 external c dependencies/meson.build` mark libz + as explictly dependent on libc. (Which is true but probably shouldn't be + necessary). +Author: Mate Kukri <mate.ku...@canonical.com> +Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/rustc/+bug/2049904 +Forwarded: no +Last-Update: 2024-02-13 +--- +This patch header follows DEP-3: http://dep.debian.net/deps/dep3/ +Index: meson-1.3.1/test cases/rust/13 external c dependencies/meson.build +=================================================================== +--- meson-1.3.1.orig/test cases/rust/13 external c dependencies/meson.build ++++ meson-1.3.1/test cases/rust/13 external c dependencies/meson.build +@@ -9,10 +9,12 @@ if not dep_zlib.found() + error('MESON_SKIP_TEST: Could not find a @0@ zlib'.format(get_option('static') ? 'static' : 'shared')) + endif + ++dep_libc = declare_dependency(link_args : '-lc') ++ + l = static_library( + 'c_accessing_zlib', + 'c_accessing_zlib.c', +- dependencies: [dep_zlib], ++ dependencies: [dep_zlib, dep_libc], + ) + + e = executable( diff -Nru meson-1.3.1/debian/patches/series meson-1.3.1/debian/patches/series --- meson-1.3.1/debian/patches/series 2023-03-28 11:13:25.000000000 +0100 +++ meson-1.3.1/debian/patches/series 2024-02-13 13:23:33.000000000 +0000 @@ -1,2 +1,3 @@ 1-disable-openmpi.patch 2-disable-rootdir-test.patch +lp2049904-workaround.patch
