xcodescripts/linker_arguments.sh

   1 #!/bin/bash -x
   2
   3 if [ $# -ne 5 ]; then
   4     echo "Usage: $0 <archs> <variants> <outputdir> <sdkroot> <srcroot>" 1>&2
   5     exit 1
   6 fi
   7
   8 shopt -s nullglob
   9
  10 ARCHS="$1"
  11 VARIANTS="$2"
  12 OUTPUTDIR="$3"
  13 SDKROOT="$4"
  14 SRCROOT="$5"
  15
  16 LIBSYS="${SDKROOT}/${SDK_INSTALL_ROOT}/usr/local/lib/system"
  17 LSYS="${SDKROOT}/${SDK_INSTALL_ROOT}/usr/lib/system"
  18
  19 mkdir -p "${OUTPUTDIR}"
  20
  21 for arch in ${ARCHS}; do
  22     for variant in ${VARIANTS}; do
  23         OUTPUTFILE="${OUTPUTDIR}/linker_arguments.${arch}.${variant}.txt"
  24         OUTPUTCONFIG="${OUTPUTDIR}/config.${arch}.${variant}.h"
  25         TEMPDIR="${OUTPUTDIR}/linker_arguments_tmp"
  26
  27         SDK_INSTALL_VARIANT="${DRIVERKIT:+_driverkit}"
  28
  29         # Unwinding i386 dependencies.
  30         # there are no more "real" uses of i386 Libsystem, only dependency
  31         # cycles from within the umbrella (plus libobjc and libc++).
  32         # We will remove non-critical dylibs (that have no real dependents
  33         # anymore) from the umbrella to decrease the overall size of the
  34         # i386 umbrella.
  35         # (Note that there is no i386 driverkit so this does not conflict
  36         # with the preceding rule)
  37         if [ "$arch" = "i386" ]; then
  38                 SDK_INSTALL_VARIANT="_i386"
  39         fi
  40
  41         mkdir -p "${TEMPDIR}"
  42
  43         ACTUALLIBS="${TEMPDIR}/${arch}.${variant}.actuallibs"
  44         ALLLIBS="${TEMPDIR}/${arch}.${variant}.alllibs"
  45         FROMUSRLIBSYSTEM="${TEMPDIR}/${arch}.${variant}.fromusrlibsystem"
  46         FROMUSRLOCALLIBSYSTEM="${TEMPDIR}/${arch}.${variant}.fromusrlocallibsystem"
  47         INUSRLIBSYSTEM="${TEMPDIR}/${arch}.${variant}.inusrlibsystem"
  48         INUSRLOCALLIBSYSTEM="${TEMPDIR}/${arch}.${variant}.inusrlocallibsystem"
  49         MISSINGLIBS="${TEMPDIR}/${arch}.${variant}.missinglibs"
  50         POSSIBLEUSRLOCALLIBSYSTEM="${TEMPDIR}/${arch}.${variant}.possibleusrlocallibsystem"
  51         OPTIONALLIBS="${SRCROOT}/optionallibs${SDK_INSTALL_VARIANT}"
  52         REQUIREDLIBS="${SRCROOT}/requiredlibs${SDK_INSTALL_VARIANT}"
  53
  54         if [ ${variant} = "normal" ]; then
  55             SUFFIX=""
  56         else
  57             SUFFIX="_${variant}"
  58         fi
  59
  60         rm -f "${OUTPUTFILE}"
  61
  62         cat ${REQUIREDLIBS} ${OPTIONALLIBS} | sort > ${ALLLIBS}
  63
  64         # Strip away variant information to do presence checks
  65         # non-normal variants can always link against normal clients
  66         cd ${LSYS} && ls lib*.{dylib,tbd,api,spi} | sed -E -e 's/_(debug|profile|static)\././' | while read l; do
  67                 if [ "${l: -6}" == ".dylib" ]; then
  68                         xcrun -sdk "${SDKROOT}" lipo "${LSYS}/${l}" -verify_arch "${arch}" 2>/dev/null
  69                 else
  70                         xcrun -sdk "${SDKROOT}" tapi archive "${LSYS}/${l}" --verify-arch "${arch}" 2>/dev/null
  71                 fi
  72                 if [ $? -eq 0 ]; then
  73                           echo "${l}"
  74                 fi
  75         done | sed -E -e 's/^lib//' -e 's/\..*$$//'  | sort -u > ${INUSRLIBSYSTEM}
  76         [ -d ${LIBSYS} ] && cd ${LIBSYS} && ls lib*.a | sed -E -e 's/_(debug|profile|static)\././' | while read l; do
  77             xcrun -sdk "${SDKROOT}" lipo "${LIBSYS}/${l}" -verify_arch "${arch}" 2>/dev/null
  78             if [ $? -eq 0 ]; then
  79                 echo "${l}"
  80             fi
  81         done | sed -E -e 's/^lib//' -e 's/\..*$$//' | sort -u > ${INUSRLOCALLIBSYSTEM}
  82
  83         while read line ; do
  84             for lib in ${line} ; do
  85                 egrep "^${lib}$" ${INUSRLIBSYSTEM} && break
  86             done
  87         done < ${ALLLIBS} > ${FROMUSRLIBSYSTEM}
  88
  89         while read line ; do
  90             for lib in ${line} ; do
  91                 egrep -q "^${lib}$" ${INUSRLIBSYSTEM} && break
  92                 egrep "^${lib}$" ${INUSRLOCALLIBSYSTEM} && break
  93             done
  94         done < ${ALLLIBS} > ${POSSIBLEUSRLOCALLIBSYSTEM}
  95
  96         comm -13 ${FROMUSRLIBSYSTEM} ${POSSIBLEUSRLOCALLIBSYSTEM} > ${FROMUSRLOCALLIBSYSTEM}
  97         cat ${FROMUSRLIBSYSTEM} ${FROMUSRLOCALLIBSYSTEM} | sort > ${ACTUALLIBS}
  98
  99         while read line ; do
 100             found=0
 101             for lib in ${line} ; do
 102                 egrep -q "^${lib}$" ${ACTUALLIBS} && found=1
 103             done
 104             [[ $found == 0 ]] && echo ${line}
 105         done < ${REQUIREDLIBS} > ${MISSINGLIBS}
 106
 107         if [ -s ${MISSINGLIBS} ]; then
 108             echo '*** missing required libs ***'
 109             cat ${MISSINGLIBS}
 110             exit 1
 111         fi
 112
 113         cat ${FROMUSRLIBSYSTEM} | while read lib; do
 114                 echo "#define HAVE_"$(echo "${lib/_sim/}" | tr 'a-z' 'A-Z')" 1"
 115         done >> "${OUTPUTCONFIG}"
 116
 117         cat ${FROMUSRLIBSYSTEM} | while read lib; do
 118             echo "-Wl,-reexport-l${lib}"
 119         done >> "${OUTPUTFILE}"
 120
 121         # Allow static archives to degrade to their non-variant versions
 122         cat ${FROMUSRLOCALLIBSYSTEM} | while read lib; do
 123             LPATH="${LIBSYS}/lib${lib}${SUFFIX}.a"
 124             xcrun -sdk "${SDKROOT}" lipo "${LPATH}" -verify_arch "${arch}" 2>/dev/null
 125             if [ $? -ne 0 ]; then
 126                 LPATH="${LIBSYS}/lib${lib}.a"
 127             fi
 128             echo "-Wl,-force_load,${LPATH}"
 129         done >> "${OUTPUTFILE}"
 130
 131         echo "Final contents of ${OUTPUTFILE}:"
 132         cat "${OUTPUTFILE}"
 133     done
 134 done
 135
 136 MARKERFILE="${OUTPUTDIR}/linker_arguments_changed.c"
 137
 138 for arch in ${ARCHS}; do
 139     for variant in ${VARIANTS}; do
 140         OUTPUTFILE="${OUTPUTDIR}/linker_arguments.${arch}.${variant}.txt"
 141         cat "${OUTPUTFILE}"
 142     done
 143 done | shasum | sed 's,^,// ,' > "${MARKERFILE}"
 144
 145 exit 0