abseil-cpp issue with _append in library name

[chadrockey]

I came across this issue today where a library name that contains _append will trigger the old syntax warning for _append to :append.

ERROR: abseil-cpp-20240116.2-r0 do_package: Variable Requires: absl_config = 20240116, absl_core_headers = 20240116, absl_log_internal_append_truncated = 20240116, absl_log_internal_config = 20240116, absl_log_internal_globals = 20240116, absl_log_severity = 20240116, absl_strings = 20240116, absl_str_format = 20240116, absl_time = 20240116, absl_span contains an operation using the old override syntax. Please convert this layer/metadata before attempting to use with a newer bitbake.

I found I'm not the only one who has seen this issue:
https://community.toradex.com/t/how-to-add-new-abseil-cpp-to-image-please-convert-this-layer-metadata/21212/5

I'm looking for guidance on if this is something that should be patched, reported upstream to bitable, or maybe there's an insane skip that should be applied?

[kraj]

@chadrockey we do not parse the cmakefiles using bitbake, so I am not sure if override syntax change is an issue here unless log_internal_append_truncated is added via some recipe variable, in anycase, can you see if you have this issue with master branch of oe-core/meta-oe ? if it happens there then override syntax is not the problem

[chadrockey]

@kraj I tested against the latest abseil-cpp. Here is the patch file I used to bypass this issue, so I can confirm what is reported on the toradex link that a match for '_append' is triggering the error:

abseil-cpp_20240116.2.bbappend

FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"

SRC_URI += "file://0001-Change-library-name-to-not-include-_append.patch"

0001-Change-library-name-to-not-include-_append.patch

From 66fed46279fd8014220d93cfc4a54a86df94eb60 Mon Sep 17 00:00:00 2001
From: Chad Rockey <chadrockey@gmail.com>
Date: Thu, 13 Jun 2024 21:26:15 +0000
Subject: [PATCH] Change library name to not include _append

---
 absl/log/CMakeLists.txt | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/absl/log/CMakeLists.txt b/absl/log/CMakeLists.txt
index a7d8b690..59a9a9c0 100644
--- a/absl/log/CMakeLists.txt
+++ b/absl/log/CMakeLists.txt
@@ -113,7 +113,7 @@ absl_cc_library(
   DEPS
     absl::config
     absl::core_headers
-    absl::log_internal_append_truncated
+    absl::log_internal_aappend_truncated
     absl::log_internal_config
     absl::log_internal_globals
     absl::log_severity
@@ -197,7 +197,7 @@ absl_cc_library(
     absl::errno_saver
     absl::inlined_vector
     absl::examine_stack
-    absl::log_internal_append_truncated
+    absl::log_internal_aappend_truncated
     absl::log_internal_format
     absl::log_internal_globals
     absl::log_internal_proto
@@ -377,7 +377,7 @@ absl_cc_library(
 
 absl_cc_library(
   NAME
-    log_internal_append_truncated
+    log_internal_aappend_truncated
   SRCS
   HDRS
     "internal/append_truncated.h"
@@ -885,7 +885,7 @@ absl_cc_test(
     absl::config
     absl::core_headers
     absl::log_entry
-    absl::log_internal_append_truncated
+    absl::log_internal_aappend_truncated
     absl::log_internal_format
     absl::log_internal_globals
     absl::log_internal_test_helpers

I've not come across anything similar to this before, so is it possible this is adding the library name to a variable as you suspect?

python split_dynamic_packages() {
    libdir = d.getVar('libdir')

    libpackages = do_split_packages(
        d,
        root=libdir,
        file_regex=r'^libabsl_(.*)\.so\..*$',
        output_pattern='libabsl-%s',
        description="abseil shared library %s",
        prepend=True,
        extra_depends='',
    )
    if libpackages:
        d.appendVar('RDEPENDS:' + d.getVar('PN'), ' ' + ' '.join(libpackages))
}

[kraj]

I see, its because its splitting the contents into sepratate packages and packages are dynamically named after the library it contains, so if a library has a string _append in this name then it gets into bitbake metadata namespace. I would like you to try using latest yocto, maybe atleast kirkstone branch since thats where we have changed the override syntax from _ to : for these kind of reasons, becasue _ is valid character for symbol names in lot of languages and places. So please test it out using master branch on yocto and see if the issue still exists.

[chadrockey]

@kraj my vendor's bsp is kirkstone, so that's why I believe the error pops up as it enforces the syntax.

The way that I produced this error was that I needed to back port the latest version of abseil-cpp so I copied the abseil-cpp recipe and files into a layer. Is there any additional testing you'd like me to do that's possible? I don't think my build will succeed if I checkout the entire oe master branch.