Looking for option to create non-thin archive for libc

[tdyjv]

I am looking for an option to create a non-thin archive for libc (and libcpp etc.). I assume arm-none-eabi-ar (or the system ar) is invoked for building ARM libc, but I can not find the correct location to change the command line switches to create a "normal" archive instead of a thin one. A poke in the right direction would be appreciated - thanks in advance.

[phillipjohnston]

What’s the context for non-thin? LTO?On Jun 3, 2024, at 19:14, John Volpe @.***> wrote: I am looking for an option to create a non-thin archive from libc (and libcpp etc.). I assume arm-non-eabi-ar (or the system ar) is invoked for building ARM libc, but I can not find the correct location to change the command line switches to create a "normal" archive instead of a thin one. A poke in the right direction would be appreciated - thanks in advance.

—Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you are subscribed to this thread.Message ID: @.***>

[tdyjv]

I'm not sure what LTO refers to, but the -T command line option on the archive "linker" command in $(BUILDRESULTS)/build.ninja makes the archive a thin one. The object files must go with libc.a for a link to succeed. I need to be use the libc.a file without a bunch of objects when linking our application.
The relevant lines in build.ninja contain "LINK_ARGS = csrDT". When I remove the "T" I get a libc.a which seems to be correct with the object files contained within the archive. So I'm looking for the source of the "csrDT" command line options so I can change how build.ninja is created.

[phillipjohnston]

I’m not doing anything to set that flag. Looks like along the way there was a meson change, perhaps the workaround is to set install: true for the libc library targets. I don’t see another way yet to disable that behavior.I never noticed bc my use through subprojects works fine with thin archive.

https://github.com/mesonbuild/meson/pull/9294

[tdyjv]

OK so for now I've added to the makefile to remove the 'T' after doing a meson setup. I'm off and running again

[phillipjohnston]

Just curious how you're doing that - are you just post-processing the generated ninja file to remove the flag?

[tdyjv]

Short answer - Yes

Changed libc Makefile rule adding the line in red :

Runs whenever the build has not been configured successfully

$(CONFIGURED_BUILD_DEP):       $(Q) $(MESON) setup $(BUILDRESULTS) $(INTERNAL_OPTIONS) $(OPTIONS)       sed -i 's%csrDT%csrD%' $(CONFIGURED_BUILD_DEP)

John Volpe Staff Software Engineer Teledyne Marine Systems Voice : 508-563-1562

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From: Phillip Johnston @.> Sent: Thursday, June 6, 2024 14:38 To: embeddedartistry/libc @.> Cc: Volpe, John (US) @.>; Author @.> Subject: Re: [embeddedartistry/libc] Looking for option to create non-thin archive for libc (Issue #195)

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Just curious how you're doing that - are you just post-processing the generated ninja file to remove the flag?

— Reply to this email directly, view it on GitHubhttps://github.com/embeddedartistry/libc/issues/195#issuecomment-2153162829, or unsubscribehttps://github.com/notifications/unsubscribe-auth/ABWJIPWPDEHHANEXLLDGI43ZGCUBBAVCNFSM6AAAAABIXSPSDGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCNJTGE3DEOBSHE. You are receiving this because you authored the thread.Message ID: @.***>