package/gcc-bare-metal: new package

This patch adds a new package for building gcc 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

@@ -1387,6 +1387,7 @@ F:	package/python-rpi-gpio/
 
 N:	Ibai Erkiaga <ibai.erkiaga-elorza@amd.com>
 F:	package/binutils-bare-metal/
+F:	package/gcc-bare-metal/
 F:	toolchain/toolchain-bare-metal-buildroot/
 
 N:	Ignacy Gawędzki <ignacy.gawedzki@green-communications.fr>
@@ -2272,6 +2273,7 @@ F:	configs/zynqmp_zcu104_defconfig
 F:	configs/zynqmp_zcu106_defconfig
 F:	package/binutils-bare-metal/
 F:	package/bootgen/
+F:	package/gcc-bare-metal/
 F:	package/versal-firmware/
 F:	toolchain/toolchain-bare-metal-buildroot/
 

package/gcc-bare-metal/13.2.0

@@ -0,0 +1 @@
+../gcc/13.2.0/

package/gcc-bare-metal/gcc-bare-metal.hash

@@ -0,0 +1 @@
+../gcc/gcc.hash

package/gcc-bare-metal/gcc-bare-metal.mk

@@ -0,0 +1,61 @@
+################################################################################
+#
+# gcc-bare-metal
+#
+################################################################################
+
+HOST_GCC_BARE_METAL_VERSION = 13.2.0
+HOST_GCC_BARE_METAL_SITE = \
+	https://ftp.gnu.org/gnu/gcc/gcc-$(HOST_GCC_BARE_METAL_VERSION)
+HOST_GCC_BARE_METAL_SOURCE = gcc-$(HOST_GCC_BARE_METAL_VERSION).tar.xz
+
+HOST_GCC_BARE_METAL_LICENSE = GPL-2.0, GPL-3.0, LGPL-2.1, LGPL-3.0
+HOST_GCC_BARE_METAL_LICENSE_FILES = COPYING COPYING3 COPYING.LIB COPYING3.LIB
+
+HOST_GCC_BARE_METAL_DEPENDENCIES = \
+	host-binutils-bare-metal \
+	host-gmp \
+	host-mpc \
+	host-mpfr \
+	host-isl
+
+# gcc doesn't support in-tree build, so we create a 'build'
+# subdirectory in the gcc sources, and build from there.
+define GCC_BARE_METAL_CONFIGURE_SYMLINK
+	mkdir -p $(@D)/build
+	ln -sf ../configure $(@D)/build/configure
+endef
+
+HOST_GCC_BARE_METAL_PRE_CONFIGURE_HOOKS += GCC_BARE_METAL_CONFIGURE_SYMLINK
+HOST_GCC_BARE_METAL_SUBDIR = build
+
+HOST_GCC_BARE_METAL_MAKE_OPTS = \
+	$(HOST_GCC_COMMON_MAKE_OPTS) \
+	all-gcc \
+	all-target-libgcc
+
+HOST_GCC_BARE_METAL_INSTALL_OPTS = install-gcc install-target-libgcc
+
+HOST_GCC_BARE_METAL_CONF_OPTS = \
+	--target=$(TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH_TUPLE) \
+	--disable-initfini_array \
+	--disable-__cxa_atexit \
+	--disable-libstdcxx-pch \
+	--with-newlib \
+	--disable-threads \
+	--enable-plugins \
+	--with-gnu-as \
+	--disable-libitm \
+	--without-long-double-128 \
+	--without-headers \
+	--enable-languages=c \
+	--disable-multilib \
+	--with-gmp=$(HOST_DIR) \
+	--with-mpc=$(HOST_DIR) \
+	--with-mpfr=$(HOST_DIR) \
+	--with-isl=$(HOST_DIR) \
+	--with-sysroot=$(TOOLCHAIN_BARE_METAL_BUILDROOT_SYSROOT) \
+	AR_FOR_TARGET=$(HOST_DIR)/bin/$(TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH_TUPLE)-ar \
+	RANLIB_FOR_TARGET=$(HOST_DIR)/bin/$(TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH_TUPLE)-ranlib
+
+$(eval $(host-autotools-package))