Libsystem-169.3.tar.gz

[apple/libsystem.git] / xcodescripts / linker_arguments.sh

diff --git a/xcodescripts/linker_arguments.sh b/xcodescripts/linker_arguments.sh
new file mode 100755 (executable)
index 0000000..f6eb771
--- /dev/null
+++ b/xcodescripts/linker_arguments.sh
@@ -0,0 +1,101 @@
+#!/bin/sh -x
+
+if [ $# -ne 5 ]; then
+    echo "Usage: $0 <archs> <variants> <outputdir> <sdkroot> <srcroot>" 1>&2
+    exit 1
+fi
+
+ARCHS="$1"
+VARIANTS="$2"
+OUTPUTDIR="$3"
+SDKROOT="$4"
+SRCROOT="$5"
+
+LIBSYS="${SDKROOT}/usr/local/lib/system"
+LSYS="${SDKROOT}/usr/lib/system"
+
+mkdir -p "${OUTPUTDIR}"
+
+for arch in ${ARCHS}; do
+    for variant in ${VARIANTS}; do
+       OUTPUTFILE="${OUTPUTDIR}/linker_arguments.${arch}.${variant}.txt"
+       TEMPDIR="${OUTPUTDIR}/linker_arguments_tmp"
+
+       mkdir -p "${TEMPDIR}"
+
+       ACTUALLIBS="${TEMPDIR}/${arch}.${variant}.actuallibs"
+       ALLLIBS="${TEMPDIR}/${arch}.${variant}.alllibs"
+       FROMUSRLIBSYSTEM="${TEMPDIR}/${arch}.${variant}.fromusrlibsystem"
+       FROMUSRLOCALLIBSYSTEM="${TEMPDIR}/${arch}.${variant}.fromusrlocallibsystem"
+       INUSRLIBSYSTEM="${TEMPDIR}/${arch}.${variant}.inusrlibsystem"
+       INUSRLOCALLIBSYSTEM="${TEMPDIR}/${arch}.${variant}.inusrlocallibsystem"
+       MISSINGLIBS="${TEMPDIR}/${arch}.${variant}.missinglibs"
+       POSSIBLEUSRLOCALLIBSYSTEM="${TEMPDIR}/${arch}.${variant}.possibleusrlocallibsystem"
+       OPTIONALLIBS="${SRCROOT}/optionallibs"
+       REQUIREDLIBS="${SRCROOT}/requiredlibs"
+
+       if [ ${variant} = "normal" ]; then
+           SUFFIX=""
+       else
+           SUFFIX="_${variant}"
+       fi
+
+       rm -f "${OUTPUTFILE}"
+
+       cat ${REQUIREDLIBS} ${OPTIONALLIBS} | sort > ${ALLLIBS}
+
+       # Strip away variant information to do presence checks
+       # non-normal variants can always link against normal clients
+       cd ${LSYS} && ls lib*.dylib | sed -E -e 's/_(debug|profile|static)\././' | while read l; do
+           xcrun -sdk "${SDKROOT}" lipo "${LSYS}/${l}" -verify_arch "${arch}" 2>/dev/null
+           if [ $? -eq 0 ]; then
+               echo "${l}"
+           fi
+       done | sed -E -e 's/^lib//' -e 's/\..*$$//'  | sort -u > ${INUSRLIBSYSTEM}
+       cd ${LIBSYS} && ls lib*.a | sed -E -e 's/_(debug|profile|static)\././' | while read l; do
+           xcrun -sdk "${SDKROOT}" lipo "${LIBSYS}/${l}" -verify_arch "${arch}" 2>/dev/null
+           if [ $? -eq 0 ]; then
+               echo "${l}"
+           fi
+       done | sed -E -e 's/^lib//' -e 's/\..*$$//' | sort -u > ${INUSRLOCALLIBSYSTEM}
+       comm -12 ${ALLLIBS} ${INUSRLIBSYSTEM} > ${FROMUSRLIBSYSTEM}
+       comm -12 ${ALLLIBS} ${INUSRLOCALLIBSYSTEM} > ${POSSIBLEUSRLOCALLIBSYSTEM}
+       comm -13 ${FROMUSRLIBSYSTEM} ${POSSIBLEUSRLOCALLIBSYSTEM} > ${FROMUSRLOCALLIBSYSTEM}
+       cat ${FROMUSRLIBSYSTEM} ${FROMUSRLOCALLIBSYSTEM} | sort > ${ACTUALLIBS}
+       comm -23 ${REQUIREDLIBS} ${ACTUALLIBS} > ${MISSINGLIBS}
+
+       if [ -s ${MISSINGLIBS} ]; then
+           echo '*** missing required libs ***'
+           cat ${MISSINGLIBS}
+           exit 1
+       fi
+
+       cat ${FROMUSRLIBSYSTEM} | while read lib; do
+           echo "-Wl,-reexport-l${lib}"
+       done >> "${OUTPUTFILE}"
+
+       # Allow static archives to degrade to their non-variant versions
+       cat ${FROMUSRLOCALLIBSYSTEM} | while read lib; do
+           LPATH="${LIBSYS}/lib${lib}${SUFFIX}.a"
+           xcrun -sdk "${SDKROOT}" lipo "${LPATH}" -verify_arch "${arch}" 2>/dev/null
+           if [ $? -ne 0 ]; then
+               LPATH="${LIBSYS}/lib${lib}.a"
+           fi
+           echo "-Wl,-force_load,${LPATH}"
+       done >> "${OUTPUTFILE}"     
+
+       echo "Final contents of ${OUTPUTFILE}:"
+       cat "${OUTPUTFILE}"
+    done
+done
+
+MARKERFILE="${OUTPUTDIR}/linker_arguments_changed.c"
+
+for arch in ${ARCHS}; do
+    for variant in ${VARIANTS}; do
+       OUTPUTFILE="${OUTPUTDIR}/linker_arguments.${arch}.${variant}.txt"
+       cat "${OUTPUTFILE}"
+    done
+done | shasum | sed 's,^,// ,' > "${MARKERFILE}"
+
+exit 0