* [Buildroot] [PATCH 1/3] package/Makefile.in: use gcc wrappers for binutils tools
@ 2020-10-14 19:39 Norbert Lange
2020-10-14 19:40 ` [Buildroot] [PATCH 2/3] package/gcc: use binutils wrappers for target libs Norbert Lange
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Norbert Lange @ 2020-10-14 19:39 UTC (permalink / raw)
To: buildroot
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.
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 = $(TARGET_CROSS)objdump
--
2.28.0
^ permalink raw reply related [flat|nested] 4+ messages in thread* [Buildroot] [PATCH 2/3] package/gcc: use binutils wrappers for target libs
2020-10-14 19:39 [Buildroot] [PATCH 1/3] package/Makefile.in: use gcc wrappers for binutils tools Norbert Lange
@ 2020-10-14 19:40 ` Norbert Lange
2020-10-14 19:40 ` [Buildroot] [PATCH 3/3] package/busybox: explicitly state binutil paths Norbert Lange
2020-10-17 17:00 ` [Buildroot] [PATCH 1/3] package/Makefile.in: use gcc wrappers for binutils tools Yann E. MORIN
2 siblings, 0 replies; 4+ messages in thread
From: Norbert Lange @ 2020-10-14 19:40 UTC (permalink / raw)
To: buildroot
This will use gcc-ar, gcc-nm and gcc-ranlib instead of the
normal binutils tools. The difference is that with the
wrappers, gcc plugins will be automatically picked up,
which might be necessary with some flags.
Signed-off-by: Norbert Lange <nolange79@gmail.com>
---
package/gcc/gcc.mk | 1 +
1 file changed, 1 insertion(+)
diff --git a/package/gcc/gcc.mk b/package/gcc/gcc.mk
index 114c2887a0..9be155c3ff 100644
--- a/package/gcc/gcc.mk
+++ b/package/gcc/gcc.mk
@@ -99,6 +99,7 @@ GCC_COMMON_TARGET_CFLAGS += -Wno-error
endif
# Propagate options used for target software building to GCC target libs
+HOST_GCC_COMMON_CONF_ENV += AR_FOR_TARGET=gcc-ar NM_FOR_TARGET=gcc-nm RANLIB_FOR_TARGET=gcc-ranlib
HOST_GCC_COMMON_CONF_ENV += CFLAGS_FOR_TARGET="$(GCC_COMMON_TARGET_CFLAGS)"
HOST_GCC_COMMON_CONF_ENV += CXXFLAGS_FOR_TARGET="$(GCC_COMMON_TARGET_CXXFLAGS)"
--
2.28.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [Buildroot] [PATCH 3/3] package/busybox: explicitly state binutil paths
2020-10-14 19:39 [Buildroot] [PATCH 1/3] package/Makefile.in: use gcc wrappers for binutils tools Norbert Lange
2020-10-14 19:40 ` [Buildroot] [PATCH 2/3] package/gcc: use binutils wrappers for target libs Norbert Lange
@ 2020-10-14 19:40 ` Norbert Lange
2020-10-17 17:00 ` [Buildroot] [PATCH 1/3] package/Makefile.in: use gcc wrappers for binutils tools Yann E. MORIN
2 siblings, 0 replies; 4+ messages in thread
From: Norbert Lange @ 2020-10-14 19:40 UTC (permalink / raw)
To: buildroot
Pass paths to ar, nm, ranlib binaries. This allows linker-plugins
to be used.
Signed-off-by: Norbert Lange <nolange79@gmail.com>
---
package/busybox/busybox.mk | 3 +++
1 file changed, 3 insertions(+)
diff --git a/package/busybox/busybox.mk b/package/busybox/busybox.mk
index 7862beb790..ddac4070d6 100644
--- a/package/busybox/busybox.mk
+++ b/package/busybox/busybox.mk
@@ -93,6 +93,9 @@ BUSYBOX_MAKE_ENV += \
endif
BUSYBOX_MAKE_OPTS = \
+ AR="$(TARGET_AR)" \
+ NM="$(TARGET_NM)" \
+ RANLIB="$(TARGET_RANLIB)" \
CC="$(TARGET_CC)" \
ARCH=$(KERNEL_ARCH) \
PREFIX="$(TARGET_DIR)" \
--
2.28.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [Buildroot] [PATCH 1/3] package/Makefile.in: use gcc wrappers for binutils tools
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
2 siblings, 0 replies; 4+ messages in thread
From: Yann E. MORIN @ 2020-10-17 17:00 UTC (permalink / raw)
To: buildroot
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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^ permalink raw reply [flat|nested] 4+ messages in thread
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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
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