From: Yann E. MORIN <yann.morin.1998@free.fr>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH 1/3] package/Makefile.in: use gcc wrappers for binutils tools
Date: Sat, 17 Oct 2020 19:00:06 +0200 [thread overview]
Message-ID: <20201017170006.GS3466@scaer> (raw)
In-Reply-To: <20201014194002.9753-1-nolange79@gmail.com>
Norbert, All,
On 2020-10-14 21:39 +0200, Norbert Lange spake thusly:
> This will use gcc-ar, gcc-nm and gcc-ranlib instead of the
> normal binutils tools. The difference is that with the
> wrappers, gcc plugins will be automatically picked up.
>
> I dont think there are any toolchains still supported that
> lack those wrappers, so it should be safe to use
> unconditionally. Otherwise an option needs to be added.
When were they added? We are supposed to still support building with at
least back to gcc-4.3:
https://git.buildroot.org/buildroot/tree/toolchain/Config.in#n557
Regards,
Yann E. MORIN.
> Note that binutils added some automatic loading with the
> 'bfd-plugins' directory (somewhere around 2.28), but
> the first implementation had issues, and generally depends on
> correctly setup symlinks (often broken, may point to some
> other gcc's library). The wrappers always work painless.
>
> The original motivation (now ~2 years in use) was to add
> "-flto -ffat-lto-objects" to both BR2_TARGET_OPTIMIZATION and
> BR2_TARGET_LDFLAGS, and have target binaries lto optimized.
>
> Not all packages will compile with this option, further work
> could white/blacklist packages (adding -fno-lto to the
> options).
>
> Signed-off-by: Norbert Lange <nolange79@gmail.com>
> ---
> package/Makefile.in | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/package/Makefile.in b/package/Makefile.in
> index 51f5cbce4f..a03f0304d5 100644
> --- a/package/Makefile.in
> +++ b/package/Makefile.in
> @@ -198,15 +198,15 @@ TARGET_CROSS = $(HOST_DIR)/bin/$(TOOLCHAIN_EXTERNAL_PREFIX)-
> endif
>
> # Define TARGET_xx variables for all common binutils/gcc
> -TARGET_AR = $(TARGET_CROSS)ar
> +TARGET_AR = $(TARGET_CROSS)gcc-ar
> TARGET_AS = $(TARGET_CROSS)as
> TARGET_CC = $(TARGET_CROSS)gcc
> TARGET_CPP = $(TARGET_CROSS)cpp
> TARGET_CXX = $(TARGET_CROSS)g++
> TARGET_FC = $(TARGET_CROSS)gfortran
> TARGET_LD = $(TARGET_CROSS)ld
> -TARGET_NM = $(TARGET_CROSS)nm
> -TARGET_RANLIB = $(TARGET_CROSS)ranlib
> +TARGET_NM = $(TARGET_CROSS)gcc-nm
> +TARGET_RANLIB = $(TARGET_CROSS)gcc-ranlib
> TARGET_READELF = $(TARGET_CROSS)readelf
> TARGET_OBJCOPY = $(TARGET_CROSS)objcopy
> TARGET_OBJDUMP = $(TARGET_CROSS)objdump
> --
> 2.28.0
>
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
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prev parent reply other threads:[~2020-10-17 17:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-14 19:39 [Buildroot] [PATCH 1/3] package/Makefile.in: use gcc wrappers for binutils tools Norbert Lange
2020-10-14 19:40 ` [Buildroot] [PATCH 2/3] package/gcc: use binutils wrappers for target libs Norbert Lange
2020-10-14 19:40 ` [Buildroot] [PATCH 3/3] package/busybox: explicitly state binutil paths Norbert Lange
2020-10-17 17:00 ` Yann E. MORIN [this message]
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