diff options
Diffstat (limited to 'sys-libs/basu/files/0001-basu-0.2.0-LLD-13-and-GNU-ld-2.37-support-z-start-stop-gc-which.patch')
| -rw-r--r-- | sys-libs/basu/files/0001-basu-0.2.0-LLD-13-and-GNU-ld-2.37-support-z-start-stop-gc-which.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/sys-libs/basu/files/0001-basu-0.2.0-LLD-13-and-GNU-ld-2.37-support-z-start-stop-gc-which.patch b/sys-libs/basu/files/0001-basu-0.2.0-LLD-13-and-GNU-ld-2.37-support-z-start-stop-gc-which.patch new file mode 100644 index 000000000000..efc4add79542 --- /dev/null +++ b/sys-libs/basu/files/0001-basu-0.2.0-LLD-13-and-GNU-ld-2.37-support-z-start-stop-gc-which.patch @@ -0,0 +1,51 @@ +From baa3a54e019b8ba6161fe20943c897490f4bcde8 Mon Sep 17 00:00:00 2001 +From: Fangrui Song <i@maskray.me> +Date: Sat, 27 Nov 2021 18:19:46 +0100 +Subject: [PATCH basu] LLD 13 and GNU ld 2.37 support -z start-stop-gc which + allows garbage collection of C identifier name sections despite the + __start_/__stop_ references. Simply set the retain attribute so that GCC 11 + (if configure-time binutils is 2.36 or newer)/Clang 13 will set the + SHF_GNU_RETAIN section attribute to prevent garbage collection. + +Without the patch, there are linker errors like the following with -z +start-stop-gc. + +``` +ld: error: undefined symbol: __start_SYSTEMD_BUS_ERROR_MAP +>>> referenced by bus-error.c:93 (../src/libsystemd/sd-bus/bus-error.c:93) +>>> sd-bus_bus-error.c.o:(bus_error_name_to_errno) in archive src/libsystemd/libsystemd_static.a +``` + +Co-authored-by: Evgeniy Khramtsov <evgeniy@khramtsov.org> +--- +Upstream: https://git.sr.ht/~emersion/basu/commit/5fa970e868f25ebc79ccca9b1d9df4c030d97661 +Gentoo bug: https://bugs.gentoo.org/832045 + + src/libsystemd/sd-bus/bus-error.h | 6 ++++++ + 1 file changed, 6 insertions(+) + +diff --git a/src/libsystemd/sd-bus/bus-error.h b/src/libsystemd/sd-bus/bus-error.h +index 06c478a..883213f 100644 +--- a/src/libsystemd/sd-bus/bus-error.h ++++ b/src/libsystemd/sd-bus/bus-error.h +@@ -28,11 +28,17 @@ int bus_error_set_errnofv(sd_bus_error *e, int error, const char *format, va_lis + * the bus error table, and BUS_ERROR_MAP_ELF_USE has to be used at + * least once per compilation unit (i.e. per library), to ensure that + * the error map is really added to the final binary. ++ * ++ * In addition, set the retain attribute so that the section cannot be ++ * discarded by ld --gc-sections -z start-stop-gc. Older compilers would ++ * warn for the unknown attribute, so just disable -Wattributes. + */ + + #define BUS_ERROR_MAP_ELF_REGISTER \ ++ _Pragma("GCC diagnostic ignored \"-Wattributes\"") \ + __attribute__ ((__section__("BUS_ERROR_MAP"))) \ + __attribute__ ((__used__)) \ ++ __attribute__ ((retain)) \ + __attribute__ ((aligned(8))) + + #define BUS_ERROR_MAP_ELF_USE(errors) \ +-- +2.34.1 + |