macho/research/custom_loader/build.sh

# set -ex

VERSION=${1:-14}
OUT=./out
LOGIC=2

mkdir -p $OUT

echo "using mach-o version $VERSION"
if [[ $VERSION -ge 14 ]]
then
  echo "Resulting binary uses MODERN symbol resolver"
else
  echo "Resulting binary uses LEGACY symbol resolver"
fi

if [[ $LOGIC -eq 0 ]]
then

clang-format -i -style=llvm *.cc

elif [[ $LOGIC -eq 1 ]]
then
# full poc flow

echo "to be continue"
# remove imports
# remove mod init
# remove symtab dysymtab
# fix link edit section

elif [[ $LOGIC -eq 2 ]]
then
# remove imports test

# libc to test reexport custom lib
clang++ -mmacosx-version-min=$VERSION -o $OUT/libc.dylib -shared c.cc

# create our dummy lib first
clang++ -mmacosx-version-min=$VERSION -o $OUT/libb.dylib -shared -Wl,-reexport_library out/libc.dylib dummy.cc
# build a references libb
clang++ -mmacosx-version-min=$VERSION -o $OUT/a -L"./out" -lb a.cc

# extract symbols from a
../../macho-go/bin/ios-wrapper remove-imports $OUT/a -o $OUT/a > $OUT/b.h
# build libb with symbols extracted from a
clang++ -mmacosx-version-min=$VERSION -o $OUT/libb.dylib -shared -Wl,-reexport_library out/libc.dylib b.cc

out/a

else

# dummy test build

clang++ -mmacosx-version-min=$VERSION -o $OUT/libc.dylib -shared c.cc
clang++ -mmacosx-version-min=$VERSION -o $OUT/libb.dylib -shared -Wl,-reexport_library out/libc.dylib b.cc
clang++ -mmacosx-version-min=$VERSION -o $OUT/a -L"./out" -lb a.cc

fi