Create "root" configs

.gitignore

@@ -37,8 +37,14 @@
 # To build out of root #
 ########################
 
-/build/*
-!/build/.keep
+/build/root-native/*
+!/build/root-native/config
+/build/root-cross-i386-linux/*
+!/build/root-cross-i386-linux/config
+/build/root-cross-riscv64-linux/*
+!/build/root-cross-riscv64-linux/config
+/build/root-cross-x86_64-linux/*
+!/build/root-cross-x86_64-linux/config
 
 ###########################################
 # Only generated when configuring in root #

build/root-cross-i386-linux/config

@@ -0,0 +1 @@
+../../config/root-cross-i386-linux

build/root-cross-riscv64-linux/config

@@ -0,0 +1 @@
+../../config/root-cross-riscv64-linux

build/root-cross-x86_64-linux/config

@@ -0,0 +1 @@
+../../config/root-cross-x86_64-linux

build/root-native/config

@@ -0,0 +1 @@
+../../config/root-native

config/root-cross-i386-linux

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+set -e
+
+REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
+if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
+
+ARCH='i386'
+HOST="$ARCH-elf"
+TARGET='i686-linux-gnu'
+PREFIX="/opt/libkernaux/$ARCH"
+
+export     AR="$TARGET-ar"
+export     CC="$TARGET-gcc"
+export RANLIB="$TARGET-ranlib"
+
+export CFLAGS='-ffreestanding -nostdlib -fno-builtin -fno-stack-protector'
+
+"$REPO/configure" --host="$HOST" --prefix="$PREFIX" --with-libc

config/root-cross-riscv64-linux

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+set -e
+
+REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
+if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
+
+ARCH='riscv64'
+HOST="$ARCH-elf"
+TARGET='riscv64-linux-gnu'
+PREFIX="/opt/libkernaux/$ARCH"
+
+export     AR="$TARGET-ar"
+export     CC="$TARGET-gcc"
+export RANLIB="$TARGET-ranlib"
+
+export CFLAGS='-ffreestanding -nostdlib -fno-builtin -fno-stack-protector'
+
+"$REPO/configure" --host="$HOST" --prefix="$PREFIX" --with-libc

config/root-cross-x86_64-linux

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+set -e
+
+REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
+if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
+
+ARCH='x86_64'
+HOST="$ARCH-elf"
+TARGET='x86_64-linux-gnu'
+PREFIX="/opt/libkernaux/$ARCH"
+
+export     AR="$TARGET-ar"
+export     CC="$TARGET-gcc"
+export RANLIB="$TARGET-ranlib"
+
+export CFLAGS='-ffreestanding -nostdlib -fno-builtin -fno-stack-protector'
+
+"$REPO/configure" --host="$HOST" --prefix="$PREFIX" --with-libc

config/root-native

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+set -e
+
+REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
+if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
+
+"$REPO/configure"