Re: [Buildroot] [PATCH v2] arch: Set max/common-page-size for libgcc & libstdc++

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

On Fri,  5 Jan 2024 11:17:10 -0800
Alexey Brodkin via buildroot <buildroot@buildroot.org> wrote:

> With [1], [2] & [3] we made sure Buildroot packages get built with
> proper MMU page size assumed. This was done nicely through insertion of
> required flags into the toolchain wrapper so that there's no need to
> pass these flags to each and every package separately - toolchain
> wrapper used for real building has all set internally and so proper
> flags are impleicitly used.
> 
> But there's yet another corner case which is not handled that way -
> these are binaries or rather libraries which are being used as a part of
> GCC compilation: libgcc_s.so.1 and libstdc++.so.
> 
> And so to make sure both the libraries get built properly we need to set
> TARGET_CFLAGS (cures libgcc_s.so) & TARGET_LDFLAGS (cures libstdc++.so).
> 
> In case of ARM by defaut 64 KiB page size seems to be used, as w/o that
> patch I see the following for BR2_ARM64_PAGE_SIZE_4K=y:
> --------------------------->8----------------------------  
> $ ./output/host/bin/aarch64-linux-readelf -l ./output/target/lib/libgcc_s.so.1

Applied to master with a few minor improvements in the commit title and
commit log. Thanks a lot!

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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