initial buildroot for linux 5.15

package/gmp/0001-mpz-inp_raw.c-Avoid-bit-size-overflows.patch

@@ -0,0 +1,27 @@
+# HG changeset patch
+# User Marco Bodrato <bodrato@mail.dm.unipi.it>
+# Date 1634836009 -7200
+# Node ID 561a9c25298e17bb01896801ff353546c6923dbd
+# Parent  e1fd9db13b475209a864577237ea4b9105b3e96e
+mpz/inp_raw.c: Avoid bit size overflows
+
+[Retrieved from: https://gmplib.org/repo/gmp-6.2/rev/561a9c25298e]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+
+diff -r e1fd9db13b47 -r 561a9c25298e mpz/inp_raw.c
+--- a/mpz/inp_raw.c	Tue Dec 22 23:49:51 2020 +0100
++++ b/mpz/inp_raw.c	Thu Oct 21 19:06:49 2021 +0200
+@@ -88,8 +88,11 @@
+ 
+   abs_csize = ABS (csize);
+ 
++  if (UNLIKELY (abs_csize > ~(mp_bitcnt_t) 0 / 8))
++    return 0; /* Bit size overflows */
++
+   /* round up to a multiple of limbs */
+-  abs_xsize = BITS_TO_LIMBS (abs_csize*8);
++  abs_xsize = BITS_TO_LIMBS ((mp_bitcnt_t) abs_csize * 8);
+ 
+   if (abs_xsize != 0)
+     {
+

package/gmp/Config.in

@@ -0,0 +1,6 @@
+config BR2_PACKAGE_GMP
+	bool "gmp"
+	help
+	  GNU Multiple Precision Arithmetic Library.
+
+	  http://gmplib.org/

package/gmp/gmp.hash

@@ -0,0 +1,6 @@
+# Locally calculated after checking pgp signature
+sha256  fd4829912cddd12f84181c3451cc752be224643e87fac497b69edddadc49b4f2  gmp-6.2.1.tar.xz
+
+# Locally calculated
+sha256  a853c2ffec17057872340eee242ae4d96cbf2b520ae27d903e1b2fef1a5f9d1c  COPYING.LESSERv3
+sha256  8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  COPYINGv2

package/gmp/gmp.mk

@@ -0,0 +1,33 @@
+################################################################################
+#
+# gmp
+#
+################################################################################
+
+GMP_VERSION = 6.2.1
+GMP_SITE = $(BR2_GNU_MIRROR)/gmp
+GMP_SOURCE = gmp-$(GMP_VERSION).tar.xz
+GMP_INSTALL_STAGING = YES
+GMP_LICENSE = LGPL-3.0+ or GPL-2.0+
+GMP_LICENSE_FILES = COPYING.LESSERv3 COPYINGv2
+GMP_CPE_ID_VENDOR = gmplib
+GMP_DEPENDENCIES = host-m4
+HOST_GMP_DEPENDENCIES = host-m4
+
+# 0001-mpz-inp_raw.c-Avoid-bit-size-overflows.patch
+GMP_IGNORE_CVES += CVE-2021-43618
+
+# GMP doesn't support assembly for coldfire or mips r6 ISA yet
+# Disable for ARM v7m since it has different asm constraints
+ifeq ($(BR2_m68k_cf)$(BR2_MIPS_CPU_MIPS32R6)$(BR2_MIPS_CPU_MIPS64R6)$(BR2_ARM_CPU_ARMV7M),y)
+GMP_CONF_OPTS += --disable-assembly
+endif
+
+ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
+GMP_CONF_OPTS += --enable-cxx
+else
+GMP_CONF_OPTS += --disable-cxx
+endif
+
+$(eval $(autotools-package))
+$(eval $(host-autotools-package))