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Message-ID: <20250425182855.GD288056@port70.net>
Date: Fri, 25 Apr 2025 20:28:55 +0200
From: Szabolcs Nagy <nsz@...t70.net>
To: Slava Barinov <rayslava@...il.com>
Cc: musl@...ts.openwall.com
Subject: Re: [PATCH] force -fno-lto for CRT files
* Slava Barinov <rayslava@...il.com> [2025-04-26 00:38:18 +0900]:
> If the library is built using -flto flag the symbol only referenced in inline
> assembly is considered unused and therefore is removed.
>
> Zig compiler has the same issue: https://github.com/ziglang/zig/issues/10364
cflags like -fno-lto require configure check, see CFLAGS_NOSSP
> ---
> Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/Makefile b/Makefile
> index 3ad88b35..709c5860 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -127,7 +127,7 @@ NOSSP_OBJS = $(CRT_OBJS) $(LDSO_OBJS) $(filter \
> , $(LIBC_OBJS))
> $(NOSSP_OBJS) $(NOSSP_OBJS:%.o=%.lo): CFLAGS_ALL += $(CFLAGS_NOSSP)
>
> -$(CRT_OBJS): CFLAGS_ALL += -DCRT
> +$(CRT_OBJS): CFLAGS_ALL += -DCRT -fno-lto
>
> $(LOBJS) $(LDSO_OBJS): CFLAGS_ALL += -fPIC
>
> --
> 2.49.0
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