1#!/usr/local/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