package/newlib-bare-metal: new package

This patch adds a new package for building newlib for a bare-metal toolchain.
The cpu architecture is defined by a toolchain-bare-metal virtual package.
While any cpu architecture could be used, the default configuration will be a
Xilinx microblaze little endian architecture, so that buildroot will be able
to build the microblaze firmware applications for zynqmp and versal.

Signed-off-by: Neal Frager <neal.frager@amd.com>
Signed-off-by: Ibai Erkiaga <ibai.erkiaga-elorza@amd.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -1388,6 +1388,7 @@ F:	package/python-rpi-gpio/
 N:	Ibai Erkiaga <ibai.erkiaga-elorza@amd.com>
 F:	package/binutils-bare-metal/
 F:	package/gcc-bare-metal/
+F:	package/newlib-bare-metal/
 F:	toolchain/toolchain-bare-metal-buildroot/
 
 N:	Ignacy Gawędzki <ignacy.gawedzki@green-communications.fr>
@@ -2274,6 +2275,7 @@ F:	configs/zynqmp_zcu106_defconfig
 F:	package/binutils-bare-metal/
 F:	package/bootgen/
 F:	package/gcc-bare-metal/
+F:	package/newlib-bare-metal/
 F:	package/versal-firmware/
 F:	toolchain/toolchain-bare-metal-buildroot/
 

package/newlib-bare-metal/Config.in

@@ -0,0 +1,2 @@
+config BR2_PACKAGE_NEWLIB_BARE_METAL
+	bool

package/newlib-bare-metal/newlib-bare-metal.hash

@@ -0,0 +1,8 @@
+# Locally calculated
+sha256  0c166a39e1bf0951dfafcd68949fe0e4b6d3658081d6282f39aeefc6310f2f13  newlib-4.4.0.20231231.tar.gz
+
+# Hashes for license files locally calculated
+sha256  231f7edcc7352d7734a96eef0b8030f77982678c516876fcb81e25b32d68564c  COPYING
+sha256  a9bdde5616ecdd1e980b44f360600ee8783b1f99b8cc83a2beb163a0a390e861  COPYING.LIB
+sha256  f3b7f3e4426b1fa6f60198dae7adfedd94b77b28db2d108adc0253575011e0ff  COPYING.LIBGLOSS
+sha256  422aa40293093fb54fc66e692a0d68fd0b24ed5602e5d1d33ad05ba3909057e9  COPYING.NEWLIB

package/newlib-bare-metal/newlib-bare-metal.mk

@@ -0,0 +1,52 @@
+################################################################################
+#
+# newlib-bare-metal
+#
+################################################################################
+
+NEWLIB_BARE_METAL_VERSION = 4.4.0
+NEWLIB_BARE_METAL_SITE = ftp://sourceware.org/pub/newlib
+NEWLIB_BARE_METAL_SOURCE = newlib-$(NEWLIB_BARE_METAL_VERSION).20231231.tar.gz
+NEWLIB_BARE_METAL_DEPENDENCIES = host-gcc-bare-metal
+NEWLIB_BARE_METAL_ADD_TOOLCHAIN_DEPENDENCY = NO
+NEWLIB_BARE_METAL_LICENSE = GPL-2.0, GPL-3.0, LGPL-2.1, LGPL-3.0
+NEWLIB_BARE_METAL_LICENSE_FILES = \
+	COPYING \
+	COPYING.LIB \
+	COPYING.LIBGLOSS \
+	COPYING.NEWLIB
+
+NEWLIB_BARE_METAL_INSTALL_STAGING = YES
+NEWLIB_BARE_METAL_INSTALL_TARGET = NO
+
+define NEWLIB_BARE_METAL_CONFIGURE_CMDS
+	(cd $(@D) && \
+		PATH=$(BR_PATH) \
+		./configure \
+			--target=$(TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH_TUPLE) \
+			--prefix=/usr \
+			--enable-newlib-io-c99-formats \
+			--enable-newlib-io-long-long \
+			--enable-newlib-io-float \
+			--enable-newlib-io-long-double \
+			--disable-multilib \
+	)
+endef
+
+define NEWLIB_BARE_METAL_BUILD_CMDS
+	PATH=$(BR_PATH) $(MAKE1) -C $(@D)
+endef
+
+define NEWLIB_BARE_METAL_INSTALL_STAGING_CMDS
+	PATH=$(BR_PATH) $(MAKE1) -C $(@D) DESTDIR=$(TOOLCHAIN_BARE_METAL_BUILDROOT_SYSROOT) install
+endef
+
+define NEWLIB_BARE_METAL_FIXUP
+	mv $(TOOLCHAIN_BARE_METAL_BUILDROOT_SYSROOT)/usr/$(TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH_TUPLE)/include \
+		$(TOOLCHAIN_BARE_METAL_BUILDROOT_SYSROOT)/usr/include
+	mv $(TOOLCHAIN_BARE_METAL_BUILDROOT_SYSROOT)/usr/$(TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH_TUPLE)/lib \
+		$(TOOLCHAIN_BARE_METAL_BUILDROOT_SYSROOT)/usr/lib
+endef
+NEWLIB_BARE_METAL_POST_INSTALL_STAGING_HOOKS += NEWLIB_BARE_METAL_FIXUP
+
+$(eval $(generic-package))