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avro-c++: Fix build for 32-bit targets

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Building avro-c++ for 32-bit targets currently fails due to the following warnings being treated as errors:

- `useless-cast` in Symbol.cc
- `conversion` in FileStream.cc

These are promoted to errors because of `-Werror` in the project's build flags.

Fix:

lib32-avro-c++/1.12/sources/avro-c++-1.12/lang/c++/impl/parsing/Symbol.cc:91:27:
error: useless cast to type 'int' [-Werror=useless-cast]
91 | adj.push_back(static_cast(it - rs.begin()));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors

lib32-avro-c++/1.12/sources/avro-c++-1.12/lang/c++/impl/FileStream.cc:208:41:
error: conversion from 'int64_t' {aka 'long long int'} to 'size_t' {aka 'unsigned int'} may change value [-Werror=conversion]
208 | in_->seek(position - byteCount_ - available_);
| ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~

lib32-avro-c++/1.12/sources/avro-c++-1.12/lang/c++/impl/FileStream.cc:209:22:
error: conversion from 'int64_t' {aka 'long long int'} to 'size_t'
{aka 'unsigned int'} may change value [-Werror=conversion]
209 | byteCount_ = position;
| ^~~~~~~~
cc1plus: all warnings being treated as errors

Signed-off-by: Alper Ak <alperyasinak1@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
This commit is contained in:
Alper Ak 2025-07-24 11:50:41 +03:00 committed by Khem Raj
parent 7e3b4725c9
commit a74ff6dda1
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1 changed files with 12 additions and 0 deletions
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meta-oe/recipes-support/avro/avro-c++_1.12.bb
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@ -26,4 +26,16 @@ do_configure:prepend() {
cp -r ${UNPACKDIR}/_deps/fmt-src ${B}/_deps/
}
# Workaround for 32-bit build failures due to -Werror:
# 'useless-cast' in Symbol.cc and 'conversion' in FileStream.cc
#
# A patch has been submitted upstream: https://github.com/apache/avro/pull/3433
# Once this or an equivalent fix is merged and the recipe upgraded, this can be removed.
#
# These errors don't occur when using Clang accordingly to upstream configuration and
# the workaround flags aren't recognized by Clang either.
# To avoid unnecessary warnings and keep the build clean across toolchains, the flags are conditionally added
# using the toolchain-gcc override. This makes it unnecessary to override anything for Clang.
CXXFLAGS:append:toolchain-gcc = " -Wno-error=useless-cast -Wno-error=conversion"
BBCLASSEXTEND = "native nativesdk"