Add GCC 10.3 support

Author: earlephilhower

Makefile

@@ -108,8 +108,17 @@ else ifeq ($(GCC), 10.2)
     BINUTILS_BRANCH := binutils-2_32
     BINUTILS_REPO := https://sourceware.org/git/binutils-gdb.git
     BINUTILS_DIR  := binutils-gdb-gnu
+else ifeq ($(GCC), 10.3)
+    ISL           := 0.18
+    GCC_BRANCH    := releases/gcc-10.3.0
+    GCC_PKGREL    := 100300
+    GCC_REPO      := https://gcc.gnu.org/git/gcc.git
+    GCC_DIR       := gcc-gnu
+    BINUTILS_BRANCH := binutils-2_32
+    BINUTILS_REPO := https://sourceware.org/git/binutils-gdb.git
+    BINUTILS_DIR  := binutils-gdb-gnu
 else
-    $(error Need to specify a supported GCC version "GCC={4.8, 4.9, 5.2, 7.2, 9.3, 10.1, 10.2}")
+    $(error Need to specify a supported GCC version "GCC={4.8, 4.9, 5.2, 7.2, 9.3, 10.1, 10.2, 10.3}")
 endif
 
 # MKSPIFFS must stay at 0.2.0 until Arduino boards.txt.py fixes non-page-aligned sizes

README.md

@@ -2,9 +2,7 @@
 
 Allows building Win32, Win64, OSX, Linux x86_64, ARM64 (aarch64) and Raspberry Pi ESP8266 toolchains in a Docker container.
 
-## Work In Progesss
-
-Builds work for GCC 4.8, 7.2, 9.3, 10.1, and 10.2.  Others not fully tested but were building last time they were tried.
+Builds work for GCC 4.8, 7.2, 9.3, 10.1, and 10.2.
 
 ## Downloading GCC/etc. sources
 

post/10.3-clean-libgcc.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Remove ROM soft-fp
+ext=$1
+for i in _addsubdf3.o _addsubsf3.o _divdf3.o _divdi3.o _divsi3.o _extendsfdf2.o _fixdfsi.o _fixunsdfsi.o _fixunssfsi.o _floatsidf.o _floatsisf.o _muldf3.o _muldi3.o _mulsf3.o _truncdfsf2.o _udivdi3.o _udivsi3.o _umoddi3.o _umodsi3.o _umulsidi3.o; do
+	./xtensa-lx106-elf.x86_64/bin/xtensa-lx106-elf-gcc-ar d ./xtensa-lx106-elf${ext}/lib/gcc/xtensa-lx106-elf/*/libgcc.a $i
+done