Re: [Buildroot] [PATCH v2 01/14] package/boost: fix asio.hpp compile errors with gcc >= 15

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

Hello,

On Tue, Oct 27, 2026 at 05:39:58PM +0100, Adam Duskett wrote:
> This commit unintentionally fixed a compile error when programs
> include the asio.hpp header with gcc versions >= 15.
> 
> ```
> In function ‘void* memcpy(void*, const void*, size_t)’,
> 
> inlined from ‘static boost::asio::ip::basic_resolver_results<InternetProtocol>
>     boost::asio::ip::basic_resolver_results<InternetProtocol>::create(boost::asio::detail::addrinfo_type*,
>     const std::string&, const std::string&) [with InternetProtocol = boost::asio::ip::tcp]’
>     at /usr/include/boost/asio/ip/basic_resolver_results.hpp:147:15:
> 
> /usr/include/bits/string_fortified.h:29:33:
>     error: ‘void* __builtin___memcpy_chk(void*, const void*, unsigned int, unsigned int)’
>     forming offset [28, 128] is out of the bounds [0, 28] of object ‘endpoint’ with type
>     ‘boost::asio::ip::tcp::endpoint’ {aka ‘boost::asio::ip::basic_endpoint<boost::asio::ip::tcp>’}
>     [-Werror=array-bounds=]
> ```
> 
> Backport URL: https://github.com/boostorg/asio/commit/b2478a9ba9ed76d7c858419e3f677cc454591d45
> 
> Fixes: None reported
> Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>

Thanks, I've applied, after doing minor tweaks to the patch, see
below.

> diff --git a/package/boost/0002-remove-FORTIFY_SOURCE-workaround.patch b/package/boost/0002-remove-FORTIFY_SOURCE-workaround.patch
> new file mode 100644
> index 0000000000..d044b62676
> --- /dev/null
> +++ b/package/boost/0002-remove-FORTIFY_SOURCE-workaround.patch
> @@ -0,0 +1,75 @@
> +From b3d87da5f87e2907ed004edf1c72ad3942ff1165 Mon Sep 17 00:00:00 2001
> +From: Christopher Kohlhoff <chris@kohlhoff.com>
> +Date: Wed, 5 Aug 2026 16:07:19 +0200
> +Subject: [PATCH] Remove _FORTIFY_SOURCE workaround.
> +
> +This commit unintentionally fixed a compile error when programs
> +include the asio.hpp header with gcc versions >= 15.
> +
> +```
> +In function ‘void* memcpy(void*, const void*, size_t)’,
> +
> +inlined from ‘static boost::asio::ip::basic_resolver_results<InternetProtocol>
> +    boost::asio::ip::basic_resolver_results<InternetProtocol>::create(boost::asio::detail::addrinfo_type*,
> +    const std::string&, const std::string&) [with InternetProtocol = boost::asio::ip::tcp]’
> +    at /usr/include/boost/asio/ip/basic_resolver_results.hpp:147:15:
> +
> +/usr/include/bits/string_fortified.h:29:33:
> +    error: ‘void* __builtin___memcpy_chk(void*, const void*, unsigned int, unsigned int)’
> +    forming offset [28, 128] is out of the bounds [0, 28] of object ‘endpoint’ with type
> +    ‘boost::asio::ip::tcp::endpoint’ {aka ‘boost::asio::ip::basic_endpoint<boost::asio::ip::tcp>’}
> +    [-Werror=array-bounds=]
> +```
> +
> +
> +Original patch commit message:
> +```
> +The previous workaround for _FORTIFY_SOURCE warnings increased the size
> +of all IP endpoint objects. Instead, try fixing the warning at the point
> +where it occurs, by limiting the length memcpy-ed while processing the
> +addrinfo results from getaddrinfo.
> +```
> +
> +Upstream: Backport [https://github.com/boostorg/asio/commit/b2478a9ba9ed76d7c858419e3f677cc454591d45]

Just:

Upstream: https://github.com/boostorg/asio/commit/b2478a9ba9ed76d7c858419e3f677cc454591d45

is enough.

> +Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
> +Signed-off-by: Christopher Kohlhoff <chris@kohlhoff.com>

Your SoB should be below the one of the author. But in this case, the
original patch does not have an SoB from the author (from what I could
see), so you cannot add it by yourself (it's like faking a signature
at the end of an important piece of paperwork!). However, you must add
your own SoB to indicate that the patch was conveyed through you.

Thanks!

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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