toolchain: add support for the newlib library

PATCH New Chris Wardman 3 participants 5 messages Sep 17, 2015 – Mar 8, 2016

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Chris Wardman

author

2015-09-17 07:21 UTC #0 lore raw

PATCH 1/2 toolchain: add support for the newlib library

This patch adds support to build gcc with the newlib library. This library will not build against linux, but does enable user to build bare metal images and other small kernels for processors.

This has been tested against building arm-buildroot-eabi- and tested against an STM32F4Discovery board with an STM32F407 processor.

Signed-off-by Chris Wardman <[email protected]>

---
 package/Makefile.in                                |  6 +++
 package/gcc/gcc-final/gcc-final.mk                 |  4 ++
 package/gcc/gcc.mk                                 |  4 ++
 .../0001-newlib-fix-include-install-location.patch | 40 +++++++++++++++++++
 package/newlib/Config.in                           |  5 +++
 package/newlib/newlib.mk                           | 45 ++++++++++++++++++++++
 toolchain/Config.in                                |  6 +++
 toolchain/toolchain-buildroot/Config.in            |  9 +++++
 8 files changed, 119 insertions(+)
 create mode 100644 package/newlib/0001-newlib-fix-include-install-location.patch
 create mode 100644 package/newlib/Config.in
 create mode 100644 package/newlib/newlib.mk

package/Makefile.in +6 -0

index 545694f..dedc622 100644
@@ -37,7 +37,11 @@ $(error BR2_TOOLCHAIN_BUILDROOT_VENDOR cannot be 'unknown'. \
 endif
 
 # Compute GNU_TARGET_NAME
+ifeq ($(BR2_TOOLCHAIN_NO_OS_TUPLE),y)
+GNU_TARGET_NAME = $(ARCH)-$(TARGET_VENDOR)-$(ABI)
+else
 GNU_TARGET_NAME = $(ARCH)-$(TARGET_VENDOR)-$(TARGET_OS)-$(LIBC)$(ABI)
+endif
 
 # FLAT binary format needs uclinux
 ifeq ($(BR2_BINFMT_FLAT),y)

@@ -50,6 +54,8 @@ ifeq ($(BR2_TOOLCHAIN_USES_UCLIBC),y)
 LIBC = uclibc
 else ifeq ($(BR2_TOOLCHAIN_USES_MUSL),y)
 LIBC = musl
+else ifeq ($(BR2_TOOLCHAIN_USES_NEWLIB),y)
+LIBC = newlib
 else
 LIBC = gnu
 endif

package/gcc/gcc-final/gcc-final.mk +4 -0

index 86b3c78..ba8d644 100644
@@ -72,6 +72,10 @@ else
 HOST_GCC_FINAL_CONF_OPTS += --enable-shared
 endif
 
+ifeq ($(BR2_TOOLCHAIN_BUILDROOT_NEWLIB),y)
+HOST_GCC_FINAL_CONF_OPTS += --with-newlib
+endif
+
 ifeq ($(BR2_GCC_ENABLE_OPENMP),y)
 HOST_GCC_FINAL_CONF_OPTS += --enable-libgomp
 else

package/gcc/gcc.mk +4 -0

index 501fcea..26451d4 100644
@@ -100,6 +100,10 @@ HOST_GCC_COMMON_CONF_OPTS = \
 HOST_GCC_COMMON_CONF_ENV = \
 	MAKEINFO=missing
 
+ifeq ($(BR2_TOOLCHAIN_BUILDROOT_NEWLIB),y)
+HOST_GCC_COMMON_CONF_OPTS += --with-gnu-as
+endif
+
 GCC_COMMON_TARGET_CFLAGS = $(TARGET_CFLAGS)
 GCC_COMMON_TARGET_CXXFLAGS = $(TARGET_CXXFLAGS)

package/newlib/0001-newlib-fix-include-install-location.patch new file +40 -0

new file mode 100644
index 0000000..a0b5951
@@ -0,0 +1,40 @@
+Newlib fix for the include install location
+
+Newlib normally installs its headers in a directory labled after the target 
+like (/usr/arm-buildroot-eabi/include/), but buildroot already creates a 
+location for the headers that conflicts with newlib's default settings.
+
+This patch does a minor correction to the path so the headers are installed in
+the proper location. 
+
+It should just modify configure.ac, and then buildroot can run the autoconf 
+tools, but newlib requires a specific version of the autoconf tools to be run.
+So, this patch modifies both configure and configure.ac since it is a simple
+change, though it is a slight hack. 
+
+Signed-off-by: Chris Wardman <[email protected]>
+
+diff -uNr newlib-old/configure newlib-new/configure
+--- newlib-old/configure	2014-07-05 17:09:07.000000000 -0400
++++ newlib-new/configure	2015-09-16 13:44:08.814638168 -0400
+@@ -6985,7 +6985,7 @@
+ 
+ # Some systems (e.g., one of the i386-aix systems the gas testers are
+ # using) don't handle "\$" correctly, so don't use it here.
+-tooldir='${exec_prefix}'/${target_noncanonical}
++tooldir='${exec_prefix}'
+ build_tooldir=${tooldir}
+ 
+ # Create a .gdbinit file which runs the one in srcdir
+diff -uNr newlib-old/configure.ac newlib-new/configure.ac
+--- newlib-old/configure.ac	2014-07-05 17:09:07.000000000 -0400
++++ newlib-new/configure.ac	2015-09-16 13:44:22.726638079 -0400
+@@ -2414,7 +2414,7 @@
+ 
+ # Some systems (e.g., one of the i386-aix systems the gas testers are
+ # using) don't handle "\$" correctly, so don't use it here.
+-tooldir='${exec_prefix}'/${target_noncanonical}
++tooldir='${exec_prefix}'
+ build_tooldir=${tooldir}
+ 
+ # Create a .gdbinit file which runs the one in srcdir

package/newlib/Config.in new file +5 -0

new file mode 100644
index 0000000..c801385
@@ -0,0 +1,5 @@
+config BR2_PACKAGE_NEWLIB
+	bool
+	depends on BR2_TOOLCHAIN_USES_NEWLIB
+	default y
+

package/newlib/newlib.mk new file +45 -0

45 lines not on this page · raw message

toolchain/Config.in +6 -0

index a851ce4..8b2ab1e 100644
@@ -28,6 +28,12 @@ config BR2_TOOLCHAIN_USES_MUSL
 	select BR2_TOOLCHAIN_HAS_THREADS_DEBUG
 	select BR2_TOOLCHAIN_HAS_THREADS_NPTL
 
+config BR2_TOOLCHAIN_USES_NEWLIB
+	bool
+
+config BR2_TOOLCHAIN_NO_OS_TUPLE
+	bool
+
 choice
 	prompt "Toolchain type"
 	help

toolchain/toolchain-buildroot/Config.in +9 -0

index 13e2b15..d88ff5f 100644
@@ -94,6 +94,14 @@ config BR2_TOOLCHAIN_BUILDROOT_MUSL
 	  This option selects musl as the C library for the
 	  cross-compilation toolchain.
 
+config BR2_TOOLCHAIN_BUILDROOT_NEWLIB
+	bool "newlib (experimental)"
+	depends on BR2_arm
+	select BR2_TOOLCHAIN_USES_NEWLIB
+	select BR2_TOOLCHAIN_NO_OS_TUPLE
+	help
+	  This will build the newlib library for a toolchain without an OS
+
 endchoice
 
 config BR2_TOOLCHAIN_BUILDROOT_LIBC

@@ -104,6 +112,7 @@ config BR2_TOOLCHAIN_BUILDROOT_LIBC
 	default "glibc"  if BR2_TOOLCHAIN_BUILDROOT_EGLIBC
 	default "glibc"  if BR2_TOOLCHAIN_BUILDROOT_GLIBC
 	default "musl"	 if BR2_TOOLCHAIN_BUILDROOT_MUSL
+	default "newlib" if BR2_TOOLCHAIN_BUILDROOT_NEWLIB
 
 source "package/uclibc/Config.in"
 source "package/glibc/Config.in"

Signature · 1 line

1.9.1

Chris Wardman

author

2015-09-17 07:21 UTC #1 lore raw

PATCH 2/2 toolchain: Add support for Cortex-M4 processor

This patch adds support for the Cortex-M4 processor. Cortex-M4 is almost completely identical to the Cortex-M3 processor. Cortex-M4 uses the same Thumb2/Thumb instruction set. Not sure if the extra M4 DSP instructions are currently supported.

Signed-off-by Chris Wardman <[email protected]>

---
 arch/Config.in.arm | 6 ++++++
 1 file changed, 6 insertions(+)

arch/Config.in.arm +6 -0

index 4d10f4c..5055cb5 100644
@@ -156,6 +156,11 @@ config BR2_cortex_m3
 	bool "cortex-M3"
 	select BR2_ARM_CPU_HAS_THUMB
 	select BR2_ARM_CPU_HAS_THUMB2
+config BR2_cortex_m4
+	bool "cortex-M4"
+	select BR2_ARM_CPU_HAS_THUMB
+	select BR2_ARM_CPU_HAR_THUMB2
+	select BR2_ARM_CPU_ARMV7M
 config BR2_fa526
 	bool "fa526/626"
 	select BR2_ARM_CPU_HAS_ARM

@@ -419,6 +424,7 @@ config BR2_GCC_TARGET_CPU
 	default "cortex-a12"	if BR2_cortex_a12
 	default "cortex-a15"	if BR2_cortex_a15
 	default "cortex-m3"	if BR2_cortex_m3
+	default "cortex-m4"     if BR2_cortex_m4
 	default "fa526"		if BR2_fa526
 	default "marvell-pj4"	if BR2_pj4
 	default "strongarm"	if BR2_strongarm

Signature · 1 line

1.9.1

Douglas RAILLARD

2015-09-17 09:40 UTC #2 lore raw

PATCH 2/2 toolchain: Add support for Cortex-M4 processor

Hi Chris,

Quoted 15 lines · Chris Wardman

This patch adds support for the Cortex-M4 processor. Cortex-M4 is almost completely identical to the Cortex-M3 processor. Cortex-M4 uses the same Thumb2/Thumb instruction set. Not sure if the extra M4 DSP instructions are currently supported.
Signed-off-by Chris Wardman <[email protected]>
---
 arch/Config.in.arm | 6 ++++++
 1 file changed, 6 insertions(+)
arch/Config.in.arm +0 -0
index 4d10f4c..5055cb5 100644

arch/Config.in.arm config BR2_cortex_m3 · line 161

Quoted 6 lines

arch/Config.in.arm +3 -0

@@ -156,6 +156,11 @@ config BR2_cortex_m3
 	bool "cortex-M3"
 	select BR2_ARM_CPU_HAS_THUMB
 	select BR2_ARM_CPU_HAS_THUMB2
+config BR2_cortex_m4
+	bool "cortex-M4"
+	select BR2_ARM_CPU_HAS_THUMB

It is not clear if selecting BR2_ARM_CPU_HAS_THUMB for Cortex M is relevant or if this leads to other problems:
http://article.gmane.org/gmane.comp.lib.uclibc.buildroot/126372

arch/Config.in.arm config BR2_cortex_m3 · line 163

Quoted 2 lines

arch/Config.in.arm +2 -0

+	select BR2_ARM_CPU_HAR_THUMB2
+	select BR2_ARM_CPU_ARMV7M

If adding the BR2_ARM_CPU_ARMV7M option is okay, this could also be used to preset some options for uClibc-ng.

arch/Config.in.arm config BR2_GCC_TARGET_CPU · line 430

Quoted 12 lines

arch/Config.in.arm +1 -0

 config BR2_fa526
 	bool "fa526/626"
 	select BR2_ARM_CPU_HAS_ARM

@@ -419,6 +424,7 @@ config BR2_GCC_TARGET_CPU
 	default "cortex-a12"	if BR2_cortex_a12
 	default "cortex-a15"	if BR2_cortex_a15
 	default "cortex-m3"	if BR2_cortex_m3
+	default "cortex-m4"     if BR2_cortex_m4
 	default "fa526"		if BR2_fa526
 	default "marvell-pj4"	if BR2_pj4
 	default "strongarm"	if BR2_strongarm

Best regards,

Douglas

Signature · 1 line

Douglas RAILLARD

Arnout Vandecappelle

2016-03-08 22:10 UTC #3 lore raw

PATCH 2/2 toolchain: Add support for Cortex-M4 processor

In reply to Chris Wardman

Quoted 15 lines · Chris Wardman

This patch adds support for the Cortex-M4 processor. Cortex-M4 is almost completely identical to the Cortex-M3 processor. Cortex-M4 uses the same Thumb2/Thumb instruction set. Not sure if the extra M4 DSP instructions are currently supported.
Signed-off-by Chris Wardman <[email protected]>
---
  arch/Config.in.arm | 6 ++++++
  1 file changed, 6 insertions(+)
arch/Config.in.arm +0 -0
index 4d10f4c..5055cb5 100644

arch/Config.in.arm config BR2_cortex_m3 · line 163

Quoted 8 lines

arch/Config.in.arm +5 -0

@@ -156,6 +156,11 @@ config BR2_cortex_m3
  	bool "cortex-M3"
  	select BR2_ARM_CPU_HAS_THUMB
  	select BR2_ARM_CPU_HAS_THUMB2
+config BR2_cortex_m4
+	bool "cortex-M4"
+	select BR2_ARM_CPU_HAS_THUMB
+	select BR2_ARM_CPU_HAR_THUMB2
+	select BR2_ARM_CPU_ARMV7M

This symbol doesn't exist yet, but it probably should. Can you add a separate
patch to add that symbol (and select it from cortex_m3)?

Regards,
Arnout

Quoted 12 lines

arch/Config.in.arm +1 -0

  config BR2_fa526
  	bool "fa526/626"
  	select BR2_ARM_CPU_HAS_ARM

@@ -419,6 +424,7 @@ config BR2_GCC_TARGET_CPU
  	default "cortex-a12"	if BR2_cortex_a12
  	default "cortex-a15"	if BR2_cortex_a15
  	default "cortex-m3"	if BR2_cortex_m3
+	default "cortex-m4"     if BR2_cortex_m4
  	default "fa526"		if BR2_fa526
  	default "marvell-pj4"	if BR2_pj4
  	default "strongarm"	if BR2_strongarm

Signature · 6 lines

Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF

Arnout Vandecappelle

2016-03-08 22:35 UTC #4 lore raw

PATCH 1/2 toolchain: add support for the newlib library

In reply to Chris Wardman

Quoted 6 lines · Chris Wardman

This patch adds support to build gcc with the newlib library. This library will not build against linux, but does enable user to build bare metal images and other small kernels for processors.
This has been tested against building arm-buildroot-eabi- and tested against an STM32F4Discovery board with an STM32F407 processor.

I would expect that at least some existing libraries would also compile. I
tried a few but nothing works...

As Peter mentioned, all packages, system and filesystems, and probably linux
as well, should be disabled in the config when newlib is selected. Also the kernel headers selection should be removed.

I've checked with other core developers and there is not a lot of enthusiasmto
include this (as witnessed by the long delay in reviewing this patch). So you'd need to be very active in pushing this to make it feasible.

Quoted 61 lines

Signed-off-by Chris Wardman <[email protected]>

---
  package/Makefile.in                                |  6 +++
  package/gcc/gcc-final/gcc-final.mk                 |  4 ++
  package/gcc/gcc.mk                                 |  4 ++
  .../0001-newlib-fix-include-install-location.patch | 40 +++++++++++++++++++
  package/newlib/Config.in                           |  5 +++
  package/newlib/newlib.mk                           | 45 ++++++++++++++++++++++
  toolchain/Config.in                                |  6 +++
  toolchain/toolchain-buildroot/Config.in            |  9 +++++
  8 files changed, 119 insertions(+)

create mode 100644 package/newlib/0001-newlib-fix-include-install-location.patch create mode 100644 package/newlib/Config.in
create mode 100644 package/newlib/newlib.mk

package/Makefile.in +6 -0

index 545694f..dedc622 100644
@@ -37,7 +37,11 @@ $(error BR2_TOOLCHAIN_BUILDROOT_VENDOR cannot be 'unknown'. \
  endif
 
  # Compute GNU_TARGET_NAME
+ifeq ($(BR2_TOOLCHAIN_NO_OS_TUPLE),y)
+GNU_TARGET_NAME = $(ARCH)-$(TARGET_VENDOR)-$(ABI)
+else
  GNU_TARGET_NAME = $(ARCH)-$(TARGET_VENDOR)-$(TARGET_OS)-$(LIBC)$(ABI)
+endif
 
  # FLAT binary format needs uclinux
  ifeq ($(BR2_BINFMT_FLAT),y)

@@ -50,6 +54,8 @@ ifeq ($(BR2_TOOLCHAIN_USES_UCLIBC),y)
  LIBC = uclibc
  else ifeq ($(BR2_TOOLCHAIN_USES_MUSL),y)
  LIBC = musl
+else ifeq ($(BR2_TOOLCHAIN_USES_NEWLIB),y)
+LIBC = newlib
  else
  LIBC = gnu
  endif

package/gcc/gcc-final/gcc-final.mk +4 -0

index 86b3c78..ba8d644 100644
@@ -72,6 +72,10 @@ else
  HOST_GCC_FINAL_CONF_OPTS += --enable-shared
  endif
 
+ifeq ($(BR2_TOOLCHAIN_BUILDROOT_NEWLIB),y)
+HOST_GCC_FINAL_CONF_OPTS += --with-newlib
+endif
+
  ifeq ($(BR2_GCC_ENABLE_OPENMP),y)
  HOST_GCC_FINAL_CONF_OPTS += --enable-libgomp
  else

package/gcc/gcc.mk +0 -0

index 501fcea..26451d4 100644

package/gcc/gcc.mk HOST_GCC_COMMON_CONF_OPTS = \ · line 103

Quoted 4 lines

package/gcc/gcc.mk +1 -0

@@ -100,6 +100,10 @@ HOST_GCC_COMMON_CONF_OPTS = \
  HOST_GCC_COMMON_CONF_ENV = \
  	MAKEINFO=missing
 
+ifeq ($(BR2_TOOLCHAIN_BUILDROOT_NEWLIB),y)

There should be a comment here to explain why this is needed.

Quoted 77 lines

package/gcc/gcc.mk +3 -0

+HOST_GCC_COMMON_CONF_OPTS += --with-gnu-as
+endif
+
  GCC_COMMON_TARGET_CFLAGS = $(TARGET_CFLAGS)
  GCC_COMMON_TARGET_CXXFLAGS = $(TARGET_CXXFLAGS)

package/newlib/0001-newlib-fix-include-install-location.patch new file +40 -0

new file mode 100644
index 0000000..a0b5951
@@ -0,0 +1,40 @@
+Newlib fix for the include install location
+
+Newlib normally installs its headers in a directory labled after the target
+like (/usr/arm-buildroot-eabi/include/), but buildroot already creates a
+location for the headers that conflicts with newlib's default settings.
+
+This patch does a minor correction to the path so the headers are installed in
+the proper location.
+
+It should just modify configure.ac, and then buildroot can run the autoconf
+tools, but newlib requires a specific version of the autoconf tools to be run.
+So, this patch modifies both configure and configure.ac since it is a simple
+change, though it is a slight hack.
+
+Signed-off-by: Chris Wardman <[email protected]>
+
+diff -uNr newlib-old/configure newlib-new/configure
+--- newlib-old/configure	2014-07-05 17:09:07.000000000 -0400
++++ newlib-new/configure	2015-09-16 13:44:08.814638168 -0400
+@@ -6985,7 +6985,7 @@
+
+ # Some systems (e.g., one of the i386-aix systems the gas testers are
+ # using) don't handle "\$" correctly, so don't use it here.
+-tooldir='${exec_prefix}'/${target_noncanonical}
++tooldir='${exec_prefix}'
+ build_tooldir=${tooldir}
+
+ # Create a .gdbinit file which runs the one in srcdir
+diff -uNr newlib-old/configure.ac newlib-new/configure.ac
+--- newlib-old/configure.ac	2014-07-05 17:09:07.000000000 -0400
++++ newlib-new/configure.ac	2015-09-16 13:44:22.726638079 -0400
+@@ -2414,7 +2414,7 @@
+
+ # Some systems (e.g., one of the i386-aix systems the gas testers are
+ # using) don't handle "\$" correctly, so don't use it here.
+-tooldir='${exec_prefix}'/${target_noncanonical}
++tooldir='${exec_prefix}'
+ build_tooldir=${tooldir}
+
+ # Create a .gdbinit file which runs the one in srcdir

package/newlib/Config.in new file +5 -0

new file mode 100644
index 0000000..c801385
@@ -0,0 +1,5 @@
+config BR2_PACKAGE_NEWLIB
+	bool
+	depends on BR2_TOOLCHAIN_USES_NEWLIB
+	default y
+

package/newlib/newlib.mk new file +8 -0

new file mode 100644
index 0000000..e3ba4df
@@ -0,0 +1,45 @@
+################################################################################
+#
+# newlib
+#
+################################################################################
+
+NEWLIB_VERSION = 2.2.0-1
+NEWLIB_SITE = ftp://sourceware.org/pub/newlib

package/newlib/newlib.mk line 18

Quoted 10 lines

package/newlib/newlib.mk new file +10 -0

+NEWLIB_LICENSE = MIT
+NEWLIB_LICENSE_FILES = COPYRIGHT
+
+NEWLIB_DEPENDENCIES = host-gcc-initial
+NEWLIB_ADD_TOOLCHAIN_DEPENDENCY = NO
+NEWLIB_INSTALL_STAGING = YES
+NEWLIB_INSTALL_TARGET = NO
+################################################################################
+# So, I've looked into this a bit. The default configure command sets flags
+# which don't work with gcc initial.

Which flag in particular? Any flag which is not appropriate should be possible
to override in NEWLIB_CONF_OPTS.

Quoted 13 lines

package/newlib/newlib.mk new file +13 -0

+################################################################################
+
+define NEWLIB_CONFIGURE_CMDS
+       (cd $(@D); \
+	$(TARGET_CONFIGURE_OPTS) \
+		CFLAGS="" \
+		CC="" \
+		LDFLAGS="" \
+		./configure \
+			--target=$(GNU_TARGET_NAME) \
+			--host=$(GNU_HOST_NAME) \
+			--prefix=/usr \
+			--includedir=$(STAGING_DIR)/usr/include \

package/newlib/newlib.mk line 41

Quoted 10 lines

package/newlib/newlib.mk new file +10 -0

+			--oldincludedir=$(STAGING_DIR)/usr/include \
+			--with-build-sysroot=$(STAGING_DIR) \
+			--enable-newlib-io-long-long \
+			--enable-newlib-register-fini \
+			--disable-newlib-supplied-syscalls \
+			--disable-nls)	
+endef
+
+define NEWLIB_PRE_INSTALL_STAGING_HOOKS
+	mkdir -p $(HOST_DIR)/usr/$(GNU_TARGET_NAME)/lib

Why is this needed? Add a comment if it really is needed.

package/newlib/newlib.mk line 45

Quoted 4 lines

package/newlib/newlib.mk new file +4 -0
+endef
+
+$(eval $(autotools-package))
+

Spurious empty line.

Regards,
Arnout

Quoted 45 lines

toolchain/Config.in +6 -0

index a851ce4..8b2ab1e 100644
@@ -28,6 +28,12 @@ config BR2_TOOLCHAIN_USES_MUSL
  	select BR2_TOOLCHAIN_HAS_THREADS_DEBUG
  	select BR2_TOOLCHAIN_HAS_THREADS_NPTL
 
+config BR2_TOOLCHAIN_USES_NEWLIB
+	bool
+
+config BR2_TOOLCHAIN_NO_OS_TUPLE
+	bool
+
  choice
  	prompt "Toolchain type"
  	help

toolchain/toolchain-buildroot/Config.in +9 -0

index 13e2b15..d88ff5f 100644
@@ -94,6 +94,14 @@ config BR2_TOOLCHAIN_BUILDROOT_MUSL
  	  This option selects musl as the C library for the
  	  cross-compilation toolchain.
 
+config BR2_TOOLCHAIN_BUILDROOT_NEWLIB
+	bool "newlib (experimental)"
+	depends on BR2_arm
+	select BR2_TOOLCHAIN_USES_NEWLIB
+	select BR2_TOOLCHAIN_NO_OS_TUPLE
+	help
+	  This will build the newlib library for a toolchain without an OS
+
  endchoice
 
  config BR2_TOOLCHAIN_BUILDROOT_LIBC

@@ -104,6 +112,7 @@ config BR2_TOOLCHAIN_BUILDROOT_LIBC
  	default "glibc"  if BR2_TOOLCHAIN_BUILDROOT_EGLIBC
  	default "glibc"  if BR2_TOOLCHAIN_BUILDROOT_GLIBC
  	default "musl"	 if BR2_TOOLCHAIN_BUILDROOT_MUSL
+	default "newlib" if BR2_TOOLCHAIN_BUILDROOT_NEWLIB
 
  source "package/uclibc/Config.in"
  source "package/glibc/Config.in"

Signature · 6 lines

Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF