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annotate sources/variables.sh @ 1816:fb05f99ffcce draft

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Collate site-local variables under "MY_XXX" prefix: MY_PATCH_DIR, MY_ROOT_OVERLAY, MY_CROSS_PATH and MY_CROSS_PREFIX.
author Rob Landley <rob@landley.net>
date Sat, 21 Nov 2015 16:44:39 -0600
parents 5ff5fea0ad7a
children
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1 #!/bin/echo "This file is sourced, not run"
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2
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3 # Avoid trouble from unexpected environment settings by unsetting all
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4 # environment variables that we don't know about, in case some crazy
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5 # person already exported $CROSS_COMPILE, $ARCH, $CDPATH, or who knows
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6 # what else. It's hard to know what might drive some package crazy,
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7 # so use a whitelist.
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8
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9 if [ -z "$NO_SANITIZE_ENVIRONMENT" ]
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10 then
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11 # Which variables are set in config?
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12
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13 TEMP=$(echo $(sed -n 's/.*export[ \t]*\([^=]*\)=.*/\1/p' config) | sed 's/ /,/g')
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14
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15 # What other variables should we keep?
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16
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17 TEMP="$TEMP,LANG,PATH,SHELL,TERM,USER,USERNAME,LOGNAME,PWD,EDITOR,HOME"
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18 TEMP="$TEMP,DISPLAY,_,TOPSHELL,START_TIME,STAGE_NAME,TOOLCHAIN_PREFIX"
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19 TEMP="$TEMP,HOST_ARCH,WRAPPY_LOGPATH,OLDPATH,http_proxy,ftp_proxy"
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20 TEMP="$TEMP,https_proxy,no_proxy,TEMP,TMPDIR,FORK,MUSL"
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22 # Unset any variable we don't recognize. It can screw up the build.
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23
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24 for i in $(env | sed -n 's/=.*//p')
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25 do
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26 is_in_list $i "$TEMP" && continue
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27 [ "${i:0:7}" == "DISTCC_" ] && continue
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28 [ "${i:0:7}" == "CCACHE_" ] && continue
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29
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30 unset $i 2>/dev/null
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31 done
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32 fi
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33
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34 # Assign (export) a variable only if current value is blank
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35
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36 export_if_blank()
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37 {
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38 [ -z "$(eval "echo \"\${${1/=*/}}\"")" ] && export "$1"
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39 }
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40
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41 # List of fallback mirrors to download package source from
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42
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43 export_if_blank MIRROR_LIST="http://landley.net/code/aboriginal/mirror http://127.0.0.1/code/aboriginal/mirror"
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44
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45 # Where are our working directories?
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46
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47 export_if_blank TOP=`pwd`
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48 export_if_blank SOURCES="$TOP/sources"
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49 export_if_blank SRCDIR="$TOP/packages"
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50 export_if_blank PATCHDIR="$SOURCES/patches"
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51 export_if_blank BUILD="$TOP/build"
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52 export_if_blank SRCTREE="$BUILD/packages"
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53 export_if_blank HOSTTOOLS="$BUILD/host"
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54 export_if_blank WRAPDIR="$BUILD/record-commands"
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55
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56 [ ! -z "$MY_PATCH_DIR" ] && export MY_PATCH_DIR="$(readlink -e "$MY_PATCH_DIR")"
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57
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58 # Set a default non-arch
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59
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60 export WORK="${BUILD}/host-temp"
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61 export ARCH_NAME=host
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62
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63 # What host compiler should we use?
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64
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65 export_if_blank CC=cc
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66
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67 # How many processors should make -j use?
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68
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69 MEMTOTAL="$(awk '/MemTotal:/{print $2}' /proc/meminfo)"
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70 if [ -z "$CPUS" ]
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71 then
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72 export CPUS=$(echo /sys/devices/system/cpu/cpu[0-9]* | wc -w)
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73 [ "$CPUS" -lt 1 ] && CPUS=1
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74
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75 # If we're not using hyper-threading, and there's plenty of memory,
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76 # use 50% more CPUS than we actually have to keep system busy
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77
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78 [ -z "$(cat /proc/cpuinfo | grep '^flags' | head -n 1 | grep -w ht)" ] &&
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79 [ $(($CPUS*512*1024)) -le $MEMTOTAL ] &&
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80 CPUS=$((($CPUS*3)/2))
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81 fi
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82
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83 export_if_blank STAGE_NAME=`echo $0 | sed 's@.*/\(.*\)\.sh@\1@'`
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84 [ ! -z "$BUILD_VERBOSE" ] && VERBOSITY="V=1"
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85
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86 export_if_blank BUILD_STATIC=busybox,toybox,binutils,gcc-core,gcc-g++,make
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87
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88 # If record-commands.sh set up a wrapper directory, adjust $PATH.
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89
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90 export PATH
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91 if [ -z "$OLDPATH" ]
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92 then
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93 export OLDPATH="$PATH"
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94 [ -z "$BUSYBOX" ] || BUSYBOX=busybox
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95 [ -f "$HOSTTOOLS/${BUSYBOX:-toybox}" ] &&
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96 PATH="$(hosttools_path)" ||
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97 PATH="$(hosttools_path):$PATH"
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98
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99 if [ -f "$WRAPDIR/wrappy" ]
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100 then
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101 OLDPATH="$PATH"
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102 mkdir -p "$BUILD/logs"
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103 [ $? -ne 0 ] && echo "Bad $WRAPDIR" >&2 && dienow
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104 PATH="$WRAPDIR"
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105 fi
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106 fi
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107 export WRAPPY_LOGPATH="$BUILD/logs/cmdlines.$ARCH_NAME.early"