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 $? 12fi 13 14# CFLAGS and OPTIMIZE are different so you can add extra CFLAGS without 15# disabling default optimizations 16[ -z "$CFLAGS" ] && CFLAGS="-Wall -Wundef -Wno-char-subscripts -Werror=implicit-function-declaration" 17# Required for our expected ABI. we're 8-bit clean thus "char" must be unsigned. 18CFLAGS="$CFLAGS -funsigned-char" 19[ -z "$OPTIMIZE" ] && OPTIMIZE="-Os -ffunction-sections -fdata-sections -fno-asynchronous-unwind-tables -fno-strict-aliasing" 20# set ASAN=1 to enable "address sanitizer" and debuggable backtraces 21[ -z "$ASAN" ] || { CFLAGS="$CFLAGS -O1 -g -fno-omit-frame-pointer -fno-optimize-sibling-calls -fsanitize=address"; NOSTRIP=1; } 22 23# We accept LDFLAGS, but by default don't have anything in it 24if [ "$(uname)" != "Darwin" ] 25then 26 [ -z "$LDOPTIMIZE" ] && LDOPTIMIZE="-Wl,--gc-sections" 27 LDASNEEDED="-Wl,--as-needed" 28fi 29 30# The makefile provides defaults for these, so this only gets used if 31# you call scripts/make.sh and friends directly. 32 33[ -z "$CC" ] && CC=cc 34[ -z "$STRIP" ] && STRIP=strip 35 36# If HOSTCC needs CFLAGS or LDFLAGS, just add them to the variable 37# ala HOSTCC="blah-cc --static" 38[ -z "$HOSTCC" ] && HOSTCC=cc 39 40[ -z "$GENERATED" ] && GENERATED=generated 41