how to build cross platform?

[azkadev]

I tried to build for android on linux debian 10 intel 64 bit but there is a failure

I have installed all the required packages but when I type this command a log appears

cmake -DCMAKE_BUILD_TYPE=Release ..

error log

-- Could NOT find ZLIB (missing: ZLIB_LIBRARY) (found version "1.2.11")
-- Could NOT find ZLIB (missing: ZLIB_LIBRARY) (found version "1.2.11")
CMake Warning at td/CMakeLists.txt:181 (message):
  Can't find zlib: stop TDLib building

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
ZLIB_LIBRARY
    linked by target "tdutils" in directory /home/azka/telegram-bot-api/td/tdutils

-- Configuring incomplete, errors occurred!
See also "/home/azka/telegram-bot-api/build/CMakeFiles/CMakeOutput.log".
See also "/home/azka/telegram-bot-api/build/CMakeFiles/CMakeError.log".

[IRGC]

Try apt install zlib1g-dev

[azkadev]

now error change

[  0%] Building C object td/sqlite/CMakeFiles/tdsqlite.dir/sqlite/sqlite3.c.o/home/azka/telegram-bot-api/td/sqlite/sqlite/sqlite3.c:22572:10: fatal error: 'openssl/opensslv.h' file not found
#include <openssl/opensslv.h>
         ^~~~~~~~~~~~~~~~~~~~
1 error generated.
make[2]: *** [td/sqlite/CMakeFiles/tdsqlite.dir/build.make:63: td/sqlite/CMakeFiles/tdsqlite.dir/sqlite/sqlite3.c.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:1301: td/sqlite/CMakeFiles/tdsqlite.dir/all] Error 2
make: *** [Makefile:130: all] Error 2

[IRGC]

apt-get install make git zlib1g-dev libssl-dev gperf cmake g++

[azkadev]

apt-get install make git zlib1g-dev libssl-dev gperf cmake g++

I have installed it, but still error

https://github.com/tdlib/telegram-bot-api/issues/180#issuecomment-915443826

please help me i am very newbie in cpp language code

[levlam]

Why do you want to build the Bot API server for Android? How do you plan to run it there?

[azkadev]

Why do you want to build the Bot API server for Android? How do you plan to run it there?

I want to build for android because I want to run my bot 24 hours on android, I have a pc but it will cost money, I will run the bot via termux, termux can run any code language like pc

[AYMENJD]

I don't recommend you to run bot api server in termux. Try to use any other MTPROTO clients or just use the official one api.telegram.org.

[levlam]

Then the simplest way would be to build the server in the Termux itself.

But you will likely have a lot of issues with the local Bot API server on Termux. api.telegram.org cloud server would be much more suitable for a bot running on a phone.

[lifegpc]

I got an another error when I cross compile with NDK The error message:

D:/telegram-bot-api/telegram-bot-api/telegram-bot-api/Client.cpp:462:93: error: no member named 'textEntityTypeMediaTimestamp' in namespace 'td::td_api'; did you mean 'textEntityTypeMentionName'?
      if (entity_type != td_api::textEntityTypeBankCardNumber::ID && entity_type != td_api::textEntityTypeMediaTimestamp::ID) {
                                                                                    ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                                                            textEntityTypeMentionName
D:/telegram-bot-api/telegram-bot-api/td/td/generate/auto\td/telegram/td_api.h:32144:7: note: 'textEntityTypeMentionName' declared here
class textEntityTypeMentionName final : public TextEntityType {
      ^
D:/telegram-bot-api/telegram-bot-api/telegram-bot-api/Client.cpp:1842:18: error: no member named 'messageChatSetTheme' in namespace 'td::td_api'; did you mean 'messageChatSetTtl'?
    case td_api::messageChatSetTheme::ID:
         ~~~~~~~~^~~~~~~~~~~~~~~~~~~
                 messageChatSetTtl
D:/telegram-bot-api/telegram-bot-api/td/td/generate/auto\td/telegram/td_api.h:19626:7: note: 'messageChatSetTtl' declared here
class messageChatSetTtl final : public MessageContent {
      ^
D:/telegram-bot-api/telegram-bot-api/telegram-bot-api/Client.cpp:1842:10: error: duplicate case value 'ID'
    case td_api::messageChatSetTheme::ID:
         ^
D:/telegram-bot-api/telegram-bot-api/telegram-bot-api/Client.cpp:1827:10: note: previous case defined here
    case td_api::messageChatSetTtl::ID: {
         ^
D:/telegram-bot-api/telegram-bot-api/telegram-bot-api/Client.cpp:8926:18: error: no member named 'messageChatSetTheme' in namespace 'td::td_api'; did you mean 'messageChatSetTtl'?
    case td_api::messageChatSetTheme::ID:
         ~~~~~~~~^~~~~~~~~~~~~~~~~~~
                 messageChatSetTtl
D:/telegram-bot-api/telegram-bot-api/td/td/generate/auto\td/telegram/td_api.h:19626:7: note: 'messageChatSetTtl' declared here
class messageChatSetTtl final : public MessageContent {
      ^
4 errors generated.
ninja: build stopped: subcommand failed.

I already build a zlib and openssl which works on termux. configuration:

cmake -DCMAKE_TOOLCHAIN_FILE=C:/android-ndk-r23/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=21 -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=E:/android -DCMAKE_INSTALL_PREFIX=E:/android -DCMAKE_FIND_ROOT_PATH=E:/android ../telegram-bot-api

cmake output

``` -- The CXX compiler identification is Clang 12.0.5 -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Check for working CXX compiler: C:/android-ndk-r23/toolchains/llvm/prebuilt/windows-x86_64/bin/clang++.exe - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done -- The C compiler identification is Clang 12.0.5 -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working C compiler: C:/android-ndk-r23/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe - skipped -- Detecting C compile features -- Detecting C compile features - done -- Could NOT find ccache (this is NOT an error) -- Found OpenSSL: E:/android/lib/libcrypto.so (found version "1.1.1l") -- Found OpenSSL: E:/android/include E:/android/lib/libssl.so;E:/android/lib/libcrypto.so -- Looking for pthread.h -- Looking for pthread.h - found -- Performing Test CMAKE_HAVE_LIBC_PTHREAD -- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed -- Check if compiler accepts -pthread -- Check if compiler accepts -pthread - yes -- Found Threads: TRUE -- Performing Test HAVE_STD14 -- Performing Test HAVE_STD14 - Success -- Performing Test HAVE_CXX_FLAG_WALL -- Performing Test HAVE_CXX_FLAG_WALL - Success -- Performing Test HAVE_CXX_FLAG_WEXTRA -- Performing Test HAVE_CXX_FLAG_WEXTRA - Success -- Performing Test HAVE_CXX_FLAG_WIMPLICIT_FALLTHROUGH_2 -- Performing Test HAVE_CXX_FLAG_WIMPLICIT_FALLTHROUGH_2 - Failed -- Performing Test HAVE_CXX_FLAG_WPOINTER_ARITH -- Performing Test HAVE_CXX_FLAG_WPOINTER_ARITH - Success -- Performing Test HAVE_CXX_FLAG_WCAST_QUAL -- Performing Test HAVE_CXX_FLAG_WCAST_QUAL - Success -- Performing Test HAVE_CXX_FLAG_WSIGN_COMPARE -- Performing Test HAVE_CXX_FLAG_WSIGN_COMPARE - Success -- Performing Test HAVE_CXX_FLAG_WDUPLICATED_BRANCHES -- Performing Test HAVE_CXX_FLAG_WDUPLICATED_BRANCHES - Failed -- Performing Test HAVE_CXX_FLAG_WDUPLICATED_COND -- Performing Test HAVE_CXX_FLAG_WDUPLICATED_COND - Failed -- Performing Test HAVE_CXX_FLAG_WALLOC_ZERO -- Performing Test HAVE_CXX_FLAG_WALLOC_ZERO - Failed -- Performing Test HAVE_CXX_FLAG_WLOGICAL_OP -- Performing Test HAVE_CXX_FLAG_WLOGICAL_OP - Failed -- Performing Test HAVE_CXX_FLAG_WTAUTOLOGICAL_COMPARE -- Performing Test HAVE_CXX_FLAG_WTAUTOLOGICAL_COMPARE - Success -- Performing Test HAVE_CXX_FLAG_WVLA -- Performing Test HAVE_CXX_FLAG_WVLA - Success -- Performing Test HAVE_CXX_FLAG_WNON_VIRTUAL_DTOR -- Performing Test HAVE_CXX_FLAG_WNON_VIRTUAL_DTOR - Success -- Performing Test HAVE_CXX_FLAG_WUNUSED_PARAMETER -- Performing Test HAVE_CXX_FLAG_WUNUSED_PARAMETER - Success -- Performing Test HAVE_CXX_FLAG_WCONVERSION -- Performing Test HAVE_CXX_FLAG_WCONVERSION - Success -- Performing Test HAVE_CXX_FLAG_WSIGN_CONVERSION -- Performing Test HAVE_CXX_FLAG_WSIGN_CONVERSION - Success -- Performing Test HAVE_CXX_FLAG_WCXX14_COMPAT_PEDANTIC -- Performing Test HAVE_CXX_FLAG_WCXX14_COMPAT_PEDANTIC - Success -- Performing Test HAVE_CXX_FLAG_WDEPRECATED -- Performing Test HAVE_CXX_FLAG_WDEPRECATED - Success -- Performing Test HAVE_CXX_FLAG_WUNUSED_COMMAND_LINE_ARGUMENT -- Performing Test HAVE_CXX_FLAG_WUNUSED_COMMAND_LINE_ARGUMENT - Success -- Performing Test HAVE_CXX_FLAG_QUNUSED_ARGUMENTS -- Performing Test HAVE_CXX_FLAG_QUNUSED_ARGUMENTS - Success -- Performing Test HAVE_CXX_FLAG_WODR -- Performing Test HAVE_CXX_FLAG_WODR - Success -- Performing Test HAVE_CXX_FLAG_FLTO_ODR_TYPE_MERGING -- Performing Test HAVE_CXX_FLAG_FLTO_ODR_TYPE_MERGING - Failed -- Found ZLIB: E:/android/lib/libz.so (found version "1.2.11") -- Found ZLIB: E:/android/include E:/android/lib/libz.so -- Performing Test COMPILER_HAS_HIDDEN_VISIBILITY -- Performing Test COMPILER_HAS_HIDDEN_VISIBILITY - Success -- Performing Test COMPILER_HAS_HIDDEN_INLINE_VISIBILITY -- Performing Test COMPILER_HAS_HIDDEN_INLINE_VISIBILITY - Success -- Performing Test COMPILER_HAS_DEPRECATED_ATTR -- Performing Test COMPILER_HAS_DEPRECATED_ATTR - Success -- Configuring done -- Generating done -- Build files have been written to: D:/telegram-bot-api/android ```

[lifegpc]

Looks like just missing some generated files. I remove all CMAKE_CROSSCOMPILING check in cmake files and copy some tools in native build directory to specify location. Now I got a working executable.

[levlam]

@lifegpc The errors mean that you updated Bot API source code, but doesn't regenerated autogenerated source files via native build.

[azkadev]

I tried to compile telegram bot api to android but after finishing the file is up to 300 mb is this normal?

[lifegpc]

I tried to compile telegram bot api to android but after finishing the file is up to 300 mb is this normal?

You need strip it because it contains debug symbols.

[azkadev]

You need strip it because it contains debug symbols. I tried compiling with this command, but the results are great, is there another trick to make the file

cmake -DCMAKE_TOOLCHAIN_FILE=/home/azkadev/android/ndk/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=29 -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=/home/azkadev/android/ndk/build/cmake -DCMAKE_INSTALL_PREFIX=/home/azkadev/android/ndk/build/cmake -DCMAKE_FIND_ROOT_PATH=/home/azkadev/android/ndk/build/cmake ..

[lifegpc]

@azkadev You can find llvm-strip in NDK binary directory. Then call it with:

<path_to_llvm_strip> telegram-bot-api

[azkadev]

@azkadev You can find llvm-strip in NDK binary directory. Then call it with:

<path_to_llvm_strip> telegram-bot-api

Wow you are amazing, thank you very much, now I can build telegram-bot-api for android because of you