fatal error: ../external/pthash/include/pthash.hpp: No such file or directory

[enricorox]

Hi!
I found errors while running compile.sh that prevented make from finishing compilation.
Specifically, it seems that ../external/pthash/include/pthash.hpp does not exists.

Scanning dependencies of target sdsl
In file included from /tmp/ESSColor/lib/sshash/include/util.hpp:8,
                 from /tmp/ESSColor/lib/sshash/include/dictionary.hpp:3,
                 from /tmp/ESSColor/lib/sshash/include/dictionary.cpp:1:
/tmp/ESSColor/lib/sshash/include/hash_util.hpp:3:10: fatal error: ../external/pthash/include/pthash.hpp: No such file or directory
    3 | #include "../external/pthash/include/pthash.hpp"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
In file included from /tmp/ESSColor/lib/sshash/include/util.hpp:8,
                 from /tmp/ESSColor/lib/sshash/include/dictionary.hpp:3,
                 from /tmp/ESSColor/lib/sshash/include/dump.cpp:1:
/tmp/ESSColor/lib/sshash/include/hash_util.hpp:3:10: fatal error: ../external/pthash/include/pthash.hpp: No such file or directory
    3 | #include "../external/pthash/include/pthash.hpp"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /tmp/ESSColor/lib/sshash/include/util.hpp:8,
                 from /tmp/ESSColor/lib/sshash/include/dictionary.hpp:3,
                 from /tmp/ESSColor/lib/sshash/include/info.cpp:1:
/tmp/ESSColor/lib/sshash/include/hash_util.hpp:3:10: fatal error: ../external/pthash/include/pthash.hpp: No such file or directory
    3 | #include "../external/pthash/include/pthash.hpp"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
compilation terminated.
make[2]: *** [lib/sshash/CMakeFiles/sshash_static.dir/build.make:95: lib/sshash/CMakeFiles/sshash_static.dir/include/dictionary.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [lib/sshash/CMakeFiles/sshash_static.dir/build.make:108: lib/sshash/CMakeFiles/sshash_static.dir/include/info.cpp.o] Error 1
make[2]: *** [lib/sshash/CMakeFiles/sshash_static.dir/build.make:121: lib/sshash/CMakeFiles/sshash_static.dir/include/dump.cpp.o] Error 1
[ 57%] Building CXX object lib/sdsl/lib/CMakeFiles/sdsl.dir/bits.cpp.o
[ 57%] Building CXX object lib/sdsl/lib/CMakeFiles/sdsl.dir/bp_support_algorithm.cpp.o
[ 57%] Building CXX object lib/sdsl/lib/CMakeFiles/sdsl.dir/coder_elias_delta.cpp.o
[ 61%] Building CXX object lib/sdsl/lib/CMakeFiles/sdsl.dir/coder_elias_gamma.cpp.o
In file included from /tmp/ESSColor/lib/sshash/include/util.hpp:8,
                 from /tmp/ESSColor/lib/sshash/include/dictionary.hpp:3,
                 from /tmp/ESSColor/lib/sshash/include/statistics.cpp:1:
/tmp/ESSColor/lib/sshash/include/hash_util.hpp:3:10: fatal error: ../external/pthash/include/pthash.hpp: No such file or directory
    3 | #include "../external/pthash/include/pthash.hpp"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
[ 61%] Building CXX object lib/sdsl/lib/CMakeFiles/sdsl.dir/coder_fibonacci.cpp.o
make[2]: *** [lib/sshash/CMakeFiles/sshash_static.dir/build.make:134: lib/sshash/CMakeFiles/sshash_static.dir/include/statistics.cpp.o] Error 1
[ 61%] Building CXX object lib/sdsl/lib/CMakeFiles/sdsl.dir/config.cpp.o
[ 61%] Building CXX object lib/sdsl/lib/CMakeFiles/sdsl.dir/construct_config.cpp.o
In file included from /tmp/ESSColor/lib/sshash/include/builder/../util.hpp:8,
                 from /tmp/ESSColor/lib/sshash/include/builder/../dictionary.hpp:3,
                 from /tmp/ESSColor/lib/sshash/include/builder/build.cpp:1:
/tmp/ESSColor/lib/sshash/include/builder/../hash_util.hpp:3:10: fatal error: ../external/pthash/include/pthash.hpp: No such file or directory
    3 | #include "../external/pthash/include/pthash.hpp"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [lib/sshash/CMakeFiles/sshash_static.dir/build.make:147: lib/sshash/CMakeFiles/sshash_static.dir/include/builder/build.cpp.o] Error 1

[enricorox]

The problem is the missing recursive cloning of sshash.

A git submodule update --init --recursive in the sshash directory solved the problem!