1#!/bin/bash 2 3# This sets environment variables used by scripts/make.sh 4 5# People run ./configure out of habit, so do "defconfig" for them. 6 7if [ "$(basename "$0")" == configure ] 8then 9 echo "Assuming you want 'make defconfig', but you should probably check the README." 10 make defconfig 11 exit $? 12fi 13 14# A synonym. 15[ -z "$CROSS_COMPILE" ] && CROSS_COMPILE="$CROSS" 16 17# CFLAGS and OPTIMIZE are different so you can add extra CFLAGS without 18# disabling default optimizations 19[ -z "$CFLAGS" ] && CFLAGS="-Wall -Wundef -Wno-char-subscripts -Werror=implicit-function-declaration" 20# Required for our expected ABI. we're 8-bit clean thus "char" must be unsigned. 21CFLAGS="$CFLAGS -funsigned-char" 22[ -z "$OPTIMIZE" ] && OPTIMIZE="-Os -ffunction-sections -fdata-sections -fno-asynchronous-unwind-tables -fno-strict-aliasing" 23 24# We accept LDFLAGS, but by default don't have anything in it 25if [ "$(uname)" != "Darwin" ] 26then 27 [ -z "$LDOPTIMIZE" ] && LDOPTIMIZE="-Wl,--gc-sections" 28 LDASNEEDED="-Wl,--as-needed" 29fi 30 31# The makefile provides defaults for these, so this only gets used if 32# you call scripts/make.sh and friends directly. 33 34[ -z "$CC" ] && CC=cc 35[ -z "$STRIP" ] && STRIP=strip 36 37# If HOSTCC needs CFLAGS or LDFLAGS, just add them to the variable 38# ala HOSTCC="blah-cc --static" 39[ -z "$HOSTCC" ] && HOSTCC=cc 40