Use full-fat newlib printf, 4.4.0+ broke stdc++ (#70)

Newlib 4.4.0 and beyond broke linking when nana-printf was used with
the stdc++ library, with linking errors related to swprintf and
fputwc.

Move to the full printf implementation which doesn't allow removing
float support (but we always enable it anyway) and adds about 20K
to the build process.

Author: earlephilhower

Makefile

@@ -40,26 +40,7 @@ NEWLIB_BRANCH := newlib-4.5.0
 
 # Depending on the GCC version get proper branch and support libs
 GNUHTTP := https://gcc.gnu.org/pub/gcc/infrastructure
-ifeq ($(GCC), 6.3)
-    ISL           := 0.16.1
-    GCC_BRANCH    := releases/gcc-6.3.0
-    GCC_PKGREL    := 60300
-    GCC_REPO      := https://gcc.gnu.org/git/gcc.git
-    GCC_DIR       := gcc-gnu
-    BINUTILS_BRANCH := binutils-2_32
-    BINUTILS_REPO := https://sourceware.org/git/binutils-gdb.git
-    BINUTILS_DIR  := binutils-gdb-gnu
-    NEWLIB_BRANCH := newlib-2_4_0
-else ifeq ($(GCC), 9.3)
-    ISL           := 0.18
-    GCC_BRANCH    := releases/gcc-9.3.0
-    GCC_PKGREL    := 90300
-    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 ifeq ($(GCC), 10.2)
+ifeq ($(GCC), 10.2)
     ISL           := 0.18
     GCC_BRANCH    := releases/gcc-10.2.0
     GCC_PKGREL    := 100200
@@ -159,7 +140,7 @@ else ifeq ($(GCC), 14.3)
     BINUTILS_REPO := https://sourceware.org/git/binutils-gdb.git
     BINUTILS_DIR  := binutils-gdb-gnu
 else
-    $(error Need to specify a supported GCC version "GCC={9.3, 10.2, 10.3, 12.1}")
+    $(error Need to specify a supported GCC version "GCC={10.2, 10.3, 12.1}")
 endif
 
 # Define the build and output naming, don't use directly (see below)
@@ -337,15 +318,10 @@ configure += $(call over,$(1))
 CONFIGURENEWLIBCOM  = --with-newlib
 CONFIGURENEWLIBCOM += --disable-newlib-io-c99-formats
 CONFIGURENEWLIBCOM += --disable-newlib-supplied-syscalls
-CONFIGURENEWLIBCOM += --enable-newlib-nano-formatted-io
-CONFIGURENEWLIBCOM += --disable-newlib-wide-orient
 CONFIGURENEWLIBCOM += --enable-newlib-reent-small
 CONFIGURENEWLIBCOM += --disable-target-optspace
 CONFIGURENEWLIBCOM += --disable-option-checking
-#CONFIGURENEWLIBCOM += --target=$(ARCH)
 CONFIGURENEWLIBCOM += --disable-shared
-#CONFIGURENEWLIBCOM += --with-cpu=cortex-m0plus
-#CONFIGURENEWLIBCOM += --with-no-thumb-interwork
 CONFIGURENEWLIBCOM += --enable-newlib-retargetable-locking
 
 # OpenOCD configuration