Compiling Stockfish with gcc on Termux

[kramnik]

I did it, but there is no bashrc:

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~ $ ls -a
.  ..  .bash_history  .termux  Stockfish-Polyglot  storage

Look for .bashrc in your home directory and add the line with the export command to it.

[LittleJoe]

I did it, but there is no bashrc:

Why not create '.bashrc' in the home-directory with an editor and write this export line in it? It will work!

[kramnik]

Hm! Nice idea!

I did it, but there is no bashrc:

Why not create '.bashrc' in the home-directory with an editor and write this export line in it? It will work!

[kramnik]

IT WORKS!

I did it, but there is no bashrc:

Why not create '.bashrc' in the home-directory with an editor and write this export line in it? It will work!

[kramnik]

Trying to compile BrainLearn 17 on Termux with GCC. It looks lile this system doesn't work...

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search.cpp:46:10: fatal error: curl/curl.h: No such file or directory
   46 | #include <curl/curl.h>
      |          ^~~~~~~~~~~~~

Static version of curl is already available in Termux.
Use pkg install libcurl-static

[Archimedes]

Trying to compile BrainLearn 17 on Termux with GCC. It looks lile this system doesn't work...

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search.cpp:46:10: fatal error: curl/curl.h: No such file or directory
   46 | #include <curl/curl.h>
      |          ^~~~~~~~~~~~~

Static version of curl is already available in Termux.
Use pkg install libcurl-static

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#include "/data/data/com.termux/files/usr/include/curl/curl.h"

[kramnik]

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mcts/montecarlo.cpp: In member function 'bool Stockfish::MonteCarlo::computational_budget() const':
mcts/montecarlo.cpp:229:6: error: 'dynamic_cast' not permitted with '-fno-rtti'
  229 |      dynamic_cast<MainThread*>(pos.this_thread())->check_time();
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[2]: *** [<builtin>: montecarlo.o] Error 1

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#include "/data/data/com.termux/files/usr/include/curl/curl.h"

[Archimedes]

You are one step further. Now add -frtti to CXXFLAGS.

By the way, you will find a working makefile for BrainLearn in my CECSA script. Compare it with the original makefile.

[kramnik]

Used your Makefile:

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/data/data/com.termux/files/cctools-toolchain/lib/gcc/aarch64-linux-android/10/../../../../aarch64-linux-android/bin/ld: cannot find -ldl
/data/data/com.termux/files/cctools-toolchain/lib/gcc/aarch64-linux-android/10/../../../../aarch64-linux-android/bin/ld: cannot find -lcrypto
/data/data/com.termux/files/cctools-toolchain/lib/gcc/aarch64-linux-android/10/../../../../aarch64-linux-android/bin/ld: cannot find -lnghttp2
/data/data/com.termux/files/cctools-toolchain/lib/gcc/aarch64-linux-android/10/../../../../aarch64-linux-android/bin/ld: cannot find -lssh2
/data/data/com.termux/files/cctools-toolchain/lib/gcc/aarch64-linux-android/10/../../../../aarch64-linux-android/bin/ld: cannot find -lssl
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:925: stockfish] Error 1
make[2]: Leaving directory '/data/data/com.termux/files/home/brainlearn'
make[1]: *** [Makefile:942: gcc-profile-make] Error 2
make[1]: Leaving directory '/data/data/com.termux/files/home/brainlearn'
make: *** [Makefile:797: profile-build] Error 2

You are one step further. Now add -frtti to CXXFLAGS.

By the way, you will find a working makefile for BrainLearn in my CECSA script. Compare it with the original makefile.

[Archimedes]

Now you must install all the missing static libraries. Don't know all package names. "pkg search" is your friend.

One of the needed package was ndk-multilib. Another needed package was openssl-static. And another were libnghttp2-static and libssh2-static. Install it and see what libraries are still missing during compilation. We will find the missing libraries.

[superbatil]

Now you must install all the missing static libraries. Don't know all package names. "pkg search" is your friend.

One of the needed package was ndk-multilib. Another needed package was openssl-static. And another were libnghttp2-static and libssh2-static. Install it and see what libraries are still missing during compilation. We will find the missing libraries.

Sir,
Where can I find complete list or tutorial of CXXFLAG, CFLAG, LDFLAG?

[Archimedes]

Where can I find complete list or tutorial of CXXFLAG, CFLAG, LDFLAG?

https://gcc.gnu.org/
http://gcc.gnu.org/onlinedocs/gcc/Invoking-GCC.html

[Archimedes]

For clarification, if you receive warning messages about missing profiles during the compilation process with PGO, add the function __gcov_dump() to your source code. For Stockfish, best place seems to be uci.cpp at the end of the bench function.

But first, you have to announce the function at the bottom of uci.cpp (maybe after the last include command).

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#include "syzygy/tbprobe.h"

extern "C" void __gcov_dump();

Then add the function at the end of the bench function in uci.cpp.

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cerr << "\n==========================="
     << "\nTotal time (ms) : " << elapsed
     << "\nNodes searched  : " << nodes
     << "\nNodes/second    : " << 1000 * nodes / elapsed << endl;

__gcov_dump();

[LittleJoe]

The function __gcov_dump() has to be called directly after the instrumented benchmark (step 2/4 of profile-build) to make sure that the measured data are written to files (this is a Termux issue). Thus placing __gcov_dump() at the end of the bench call in uci.cpp seemed to me the only logical location. However, I have to admit, that I did not try other locations in the SF code, when I managed to do my first successful pgo-compilation with GCC some time ago.

[hagtorp]

Hi there, long time no see. Does anyone have CCTools packages? The site from where it all swayed does not work, but I do not have a backup.