Can not build as shared library

[uilianries]

Hi!

I see no restriction described about building this project as shared library, however, I see a linkage error and building:

$ cd build && cmake .. -G "Unix Makefiles" -DCMAKE_BUILD_TYPE="Release" -DCMAKE_CXX_FLAGS="-m64" -DCMAKE_SHARED_LINKER_FLAGS="-m64" -DCMAKE_C_FLAGS="-m64" -DBUILD_SHARED_LIBS="ON" -DCMAKE_POSITION_INDEPENDENT_CODE="ON" -DOPTION_ASTC_TESTS="OFF"

-- The C compiler identification is GNU 10.1.0
-- The CXX compiler identification is GNU 10.1.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Conan: called by CMake conan helper
-- Conan: called inside local cache
-- Conan: Adjusting output directories
-- Conan: Using cmake global configuration
-- Conan: Adjusting default RPATHs Conan policies
-- Conan: Adjusting language standard
-- Conan: Adjusting fPIC flag (ON)
-- Conan: Compiler GCC>=5, checking major version 10
-- Conan: Checking correct version: 10
-- Conan: C++ stdlib: libstdc++11
-- Configuring done
-- Generating done

-- Build files have been written to: /home/uilian/data/astc-codec/build


$ cmake --build .

Scanning dependencies of target footprint
[  6%] Building CXX object src/decoder/CMakeFiles/footprint.dir/footprint.cc.o
[ 12%] Linking CXX shared library libfootprint.so
[ 12%] Built target footprint
Scanning dependencies of target astc_utils
[ 18%] Building CXX object src/decoder/CMakeFiles/astc_utils.dir/astc_file.cc.o
[ 25%] Building CXX object src/decoder/CMakeFiles/astc_utils.dir/endpoint_codec.cc.o
[ 31%] Building CXX object src/decoder/CMakeFiles/astc_utils.dir/integer_sequence_codec.cc.o
[ 37%] Building CXX object src/decoder/CMakeFiles/astc_utils.dir/intermediate_astc_block.cc.o
[ 43%] Building CXX object src/decoder/CMakeFiles/astc_utils.dir/logical_astc_block.cc.o
[ 50%] Building CXX object src/decoder/CMakeFiles/astc_utils.dir/partition.cc.o
[ 56%] Building CXX object src/decoder/CMakeFiles/astc_utils.dir/physical_astc_block.cc.o
[ 62%] Building CXX object src/decoder/CMakeFiles/astc_utils.dir/quantization.cc.o
[ 68%] Building CXX object src/decoder/CMakeFiles/astc_utils.dir/weight_infill.cc.o
[ 75%] Linking CXX shared library libastc_utils.so
[ 75%] Built target astc_utils
Scanning dependencies of target astc_inspector_cli
[ 81%] Building CXX object src/decoder/CMakeFiles/astc_inspector_cli.dir/tools/astc_inspector_cli.cc.o
[ 87%] Linking CXX executable astc_inspector_cli
/usr/bin/ld: CMakeFiles/astc_inspector_cli.dir/tools/astc_inspector_cli.cc.o: undefined reference to symbol '_ZN10astc_codec9Footprint5ParseEPKc'
/usr/bin/ld: /home/uilian/data/astc-codec/build/build/src/decoder/libfootprint.so: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[2]: *** [src/decoder/CMakeFiles/astc_inspector_cli.dir/build.make:104: src/decoder/astc_inspector_cli] Error 1
make[1]: *** [CMakeFiles/Makefile2:140: src/decoder/CMakeFiles/astc_inspector_cli.dir/all] Error 2
make: *** [Makefile:103: all] Error 2

The error seems be related to astc_inspector_cli and some missing symbol.

Environment:

arch=x86_64
build type=Release
compiler=gcc 10
libcxx=libstdc++11
os=Linux

I'm using the commit 9757bef: https://github.com/google/astc-codec/archive/9757befb64db6662aad45de09ca87cd6f599ac02.tar.gz