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# set ASAN=1 to enable "address sanitizer" and debuggable backtraces 24[ -z "$ASAN" ] || { CFLAGS="$CFLAGS -O1 -g -fno-omit-frame-pointer -fno-optimize-sibling-calls -fsanitize=address"; NOSTRIP=1; } 25 26# We accept LDFLAGS, but by default don't have anything in it 27if [ "$(uname)" != "Darwin" ] 28then 29 [ -z "$LDOPTIMIZE" ] && LDOPTIMIZE="-Wl,--gc-sections" 30 LDASNEEDED="-Wl,--as-needed" 31fi 32 33# The makefile provides defaults for these, so this only gets used if 34# you call scripts/make.sh and friends directly. 35 36[ -z "$CC" ] && CC=cc 37[ -z "$STRIP" ] && STRIP=strip 38 39# If HOSTCC needs CFLAGS or LDFLAGS, just add them to the variable 40# ala HOSTCC="blah-cc --static" 41[ -z "$HOSTCC" ] && HOSTCC=cc 42 43[ -z "$GENERATED" ] && GENERATED=generated 44