Compile entire picolibc

It does not compile yet, will need __iob array to be defined
Also there are multiple definitions of some functions

litex/soc/integration/builder.py

@@ -36,12 +36,14 @@ def _create_dir(d, remove_if_exists=False):
 # Software Packages --------------------------------------------------------------------------------
 
 soc_software_packages = [
+    # picolibc
+    "libc",
+
     # Compiler-RT.
     "libcompiler_rt",
 
     # LiteX cores.
     "libbase",
-    "libc",
 
     # LiteX Ecosystem cores.
     "libfatfs",

litex/soc/software/libc/Makefile

@@ -1,7 +1,10 @@
 include ../include/generated/variables.mak
 include $(SOC_DIRECTORY)/software/common.mak
 
-newlib/libc.a:
-	$(LIBC_DIRECTORY)/do-rv32im-configure $(PICOLIBC_DIRECTORY)
+libc.a:
+	meson $(PICOLIBC_DIRECTORY) \
+		-Dmultilib=false \
+		--cross-file "$(LIBC_DIRECTORY)/cross-rv32im.txt"
 	meson compile
-	sh $(LIBC_DIRECTORY)/swap_libc.sh
+	cp newlib/libc.a libc.a
+

litex/soc/software/libc/do-rv32im-configure

@@ -1,11 +0,0 @@
-#!/bin/sh
-
-ARCH=riscv64-unknown-elf
-DIR=`dirname $0`
-meson "$1" \
-        -Dtests=true \
-        -Dmultilib=false \
-        -Dincludedir="picolibc/$ARCH/include" \
-        -Dlibdir="picolibc/$ARCH/lib" \
-        --cross-file "$DIR/cross-rv32im.txt" \
-

litex/soc/software/libc/swap_libc.sh

@@ -1,58 +0,0 @@
-#!/bin/sh
-
-AR=riscv64-unknown-elf-ar
-
-for obj in \
-    vsnprintf.c.o \
-    vfprintf.c.o \
-    fputc.c.o \
-    filestrput.c.o \
-    dtoa_ryu.c.o \
-    ryu_table.c.o \
-    ryu_umul128.c.o \
-    ryu_log10.c.o \
-    ryu_log2pow5.c.o \
-    ryu_pow5bits.c.o \
-    ryu_divpow2.c.o \
-    qsort.c.o \
-    strchr.c.o \
-    strpbrk.c.o \
-    strrchr.c.o \
-    strcpy.c.o \
-    strncpy.c.o \
-    strcmp.S.o \
-    strncmp.c.o \
-    strcat.c.o \
-    strncat.c.o \
-    strlen.c.o \
-    strnlen.c.o \
-    strspn.c.o \
-    memcmp.c.o \
-    memset.S.o \
-    memcpy.c.o \
-    memmove.S.o \
-    strstr.c.o \
-    memchr.c.o \
-    strtoul.c.o \
-    strtol.c.o \
-    snprintf.c.o \
-    sprintf.c.o \
-    rand.c.o \
-    srand.c.o \
-    abort.c.o \
-    errno.c.o \
-    strerror.c.o \
-    strtod.c.o \
-    ctype_.c.o \
-    locale.c.o \
-    mbtowc_r.c.o \
-    wctomb_r.c.o \
-    strcasecmp.c.o \
-    isdigit.c.o \
-; do
-    $AR x "newlib/libc.a" $obj
-    $AR csr "../libbase/libbase.a" $obj
-    $AR csr "../libbase/libbase-nofloat.a" $obj
-    rm $obj
-done
-