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Posted to notifications@logging.apache.org by GitBox <gi...@apache.org> on 2023/01/12 16:49:18 UTC
[GitHub] [logging-log4cxx] LOCNNIL opened a new issue, #176: Error Cross-compiling library
LOCNNIL opened a new issue, #176:
URL: https://github.com/apache/logging-log4cxx/issues/176
I'm trying to cross compile the **log4cxx** lib for an armv7l arch.
# Steps to reproduce:
### Install the cross tolchain arm-linux-gnueabi
```bash
sudo apt install -y gcc-arm-linux-gnueabi g++-arm-linux-gnueabi binutils-arm-linux-gnueabi
```
### Start some env variables to hold directores
```bash
export DIR_TARGET=/data/marthe/usr
export DIR_HOST=$HOME/project/lib/expat
```
## **Expat** dependency library
```bash
wget https://github.com/libexpat/libexpat/releases/download/R_2_5_0/expat-2.5.0.tar.gz
## Extract the source code
tar -xvf expat-2.5.0.tar.gz
cd expat-2.5.0
```
#### Configuring
```bash
./configure \
--build=i686-pc-linux-gnu \
--host=arm-linux-gnueabi \
--prefix=$DIR_HOST \
--exec-prefix=$DIR_HOST \
STRIP="/usr/bin/arm-linux-gnueabi-strip" \
AR="/usr/bin/arm-linux-gnueabi-ar" \
CC="/usr/bin/arm-linux-gnueabi-gcc -march=armv7-a -mfloat-abi=softfp -mfpu=neon" \
CXX="/usr/bin/arm-linux-gnueabi-g++ -march=armv7-a -mfloat-abi=softfp -mfpu=neon" \
CFLAGS="-O3 -fexpensive-optimizations -frename-registers -fomit-frame-pointer" \
CXXFLAGS="-O3 -fexpensive-optimizations -frename-registers -fomit-frame-pointer" \
LDFLAGS="-Wl,--strip-all -Wl,--rpath=$DIR_TARGET/lib -Wl,--dynamic-linker=$DIR_TARGET/lib/ld-linux.so.3 -Wl,-O3 -Wl,--hash-style=gnu -Wl,--as-needed" \
CPP="/usr/bin/arm-linux-gnueabi-gcc -E -march=armv7-a -mfloat-abi=softfp -mfpu=neon" \
CXXCPP="/usr/bin/arm-linux-gnueabi-g++ -E -march=armv7-a -mfloat-abi=softfp -mfpu=neon" \
STRIP="/usr/bin/arm-linux-gnueabi-strip" \
OBJDUMP="/usr/bin/arm-linux-gnueabi-objdump"
make -j4
make install
```
## Log4cxx instalation
### Downloading and extracting source code
```bash
wget https://dlcdn.apache.org/logging/log4cxx/1.0.0/apache-log4cxx-1.0.0.tar.gz
tar -xvf apache-log4cxx-1.0.0.tar.gz
cd apache-log4cxx-1.0.0
```
### Configuring
```bash
cmake -Bbuild -H. \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_INSTALL_PREFIX=$HOME/project/lib/log4cxx \
-DCMAKE_TOOLCHAIN_FILE=$HOME/project/cmake/toolchain-arm-linux-gnueabi.cmake \
-DBUILD_TESTING=off \
-DBUILD_SHARED_LIBS=off \
-DEXPAT_LIBRARY=$HOME/project/lib/expat/lib \
-DEXPAT_INCLUDE_DIR=$HOME/project/lib/expat/include \
-G "Unix Makefiles"
```
# Error from configuration step
```
-- Available appenders:
-- Async Appender .................. : ON
-- ODBC Appender ................... : OFF
-- SMTP Appender ................... : OFF
-- XMLSocketAppender ............... : ON
-- SocketHubAppender ............... : ON
-- SyslogAppender .................. : ON
-- TelnetAppender .................. : ON
-- NTEventLogAppender .............. : OFF
-- OutputDebugStringAppender ....... : ON
-- ConsoleAppender ................. : ON
-- FileAppender .................... : ON
-- RollingFileAppender ............. : ON
-- MultiprocessRollingFileAppender . : OFF
-- Available layouts:
-- HTMLLayout ...................... : ON
-- JSONLayout ...................... : ON
-- PatternLayout ................... : ON
-- SimpleLayout .................... : ON
-- XMLLayout ....................... : ON
-- FMTLayout ....................... : OFF
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:
/home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/src/APR_INCLUDE_DIR
used as include directory in directory /home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/src/main/cpp
/home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/src/APR_UTIL_INCLUDE_DIR
used as include directory in directory /home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/src/main/cpp
-- Configuring incomplete, errors occurred!
See also "/home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/build/CMakeFiles/CMakeOutput.log".
See also "/home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/build/CMakeFiles/CMakeError.log".
```
these are the log files of the errors:
[CMakeError.log](https://github.com/apache/logging-log4cxx/files/10403684/CMakeError.log)
[CMakeOutput.log](https://github.com/apache/logging-log4cxx/files/10403685/CMakeOutput.log)
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[GitHub] [logging-log4cxx] LOCNNIL commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by GitBox <gi...@apache.org>.
LOCNNIL commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1381739897
Currenty to find the libraries and compile the code I'm using the Cmake file `toolchain-arm-linux-gnueabi.cmake` that points to my toolchain.
This is my toolchain file:
```cmake
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_VERSION 1)
set(cpu_flags "-march=armv7-a -mfloat-abi=softfp -mfpu=neon")
set(c_cxx_flags " -O2 -fexpensive-optimizations -frename-registers -fomit-frame-pointer -pthread")
set(CMAKE_C_COMPILER /usr/bin/arm-linux-gnueabi-gcc ${cpu_flags})
set(CMAKE_CXX_COMPILER /usr/bin/arm-linux-gnueabi-g++ ${cpu_flags})
set (CMAKE_SHARED_LINKER_FLAGS "-Wl,-start-group -lpthread -lm -Wl,-end-group -Wl,--rpath=${target_dir}/lib -Wl,--dynamic-linker=${target_dir}/lib/ld-linux.so.3 -Wl,-O3 -Wl,--hash-style=gnu -Wl,--as-needed")
set(CMAKE_C_FLAGS ${c_cxx_flags})
set(CMAKE_CXX_FLAGS ${c_cxx_flags})
set(CMAKE_STRIP /usr/bin/arm-linux-gnueabi-strip)
set(CMAKE_FIND_ROOT_PATH /usr/arm-linux-gnueabi)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
```
I realized that my toolchain file was missing the specification `-pthread` to tell the compiler that I'm going to use the **thread** library. Also the linker flag `-lpthread` but this last is only for the linker and don't map the macros inside the library so I had to use both.
But now I'm with a **different** error. It's a linking error too saying that:
```bash
cannot find -lesmtp
```
So now I'm going to cross compile libESMTP. But first, is this library realy necessary or just used for some feature? If so, is there an Cmake option where I can disable it?
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[GitHub] [logging-log4cxx] LOCNNIL commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by GitBox <gi...@apache.org>.
LOCNNIL commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1383045132
> > 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:
> > /home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/src/APR_INCLUDE_DIR
> > used as include directory in directory /home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/src/main/cpp
> > /home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/src/APR_UTIL_INCLUDE_DIR
>
> You need to build APR and APR-UTIL with your cross-compiler.
>
> To cross-compile APR you will need a triplet file that locates the tool chain and sets --host and --cache parameters of "./configure". The .cache file must have been generated on the targeted host using "./configure -C".
Okay, I'm going to try this! But just one question, did the ./configure -C compiles something on my environment or just use some coreutils and other simple things? Because my target (which is also my host) environment it's pretty limited. It's a embedded armv7l running with BusyBox.
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[GitHub] [logging-log4cxx] Zaoui-Douaa commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by "Zaoui-Douaa (via GitHub)" <gi...@apache.org>.
Zaoui-Douaa commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1527003104
how can i build log4cxx with linux arm cortex A9
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[GitHub] [logging-log4cxx] rm5248 commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by GitBox <gi...@apache.org>.
rm5248 commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1383045125
> So if I just comment this part I will be able to cross-compile successfully? If yes, I'll gonna try it and post here the results.
That seems like a good thing to try.
> Okay, I'm going to try this! But just one question, did the `./configure -C` compiles something on my environment or just use some coreutils and other simple things? Because my target (which is algo my host) environment it's pretty limited. It's a embedded armv7l running with BusyBox.
I have no idea - I have found cross-compiling is hard to setup correctly. If the build scripts are not setup correctly it may not work. In theory, cross-compiling only checks things in the rootfs(e.g. include files, libraries). You may also need to worry about the `--sysroot` option for GCC.
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[GitHub] [logging-log4cxx] LOCNNIL commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by GitBox <gi...@apache.org>.
LOCNNIL commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1383043657
>
Okay, I'm going to try this! But just one question, did the `./configure -C` compiles something on my environment or just use some coreutils and other simple things? Because my target (which is algo my host) environment it's pretty limited. It's a embedded armv7l running with BusyBox.
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[GitHub] [logging-log4cxx] swebb2066 commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by GitBox <gi...@apache.org>.
swebb2066 commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1383057644
The autotools `./configure -C` does a lot of stuff, including trying to compile some code.
As BusyBox does not support gcc, you will need to hack a cache file generated on some other armv7 machine (say a raspberrypi).
Perhaps you should also look at [https://github.com/apache/apr/pull/8](this old PR)
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[GitHub] [logging-log4cxx] rm5248 closed issue #176: Error when Cross-compiling library for ARMv7l
Posted by "rm5248 (via GitHub)" <gi...@apache.org>.
rm5248 closed issue #176: Error when Cross-compiling library for ARMv7l
URL: https://github.com/apache/logging-log4cxx/issues/176
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[GitHub] [logging-log4cxx] swebb2066 commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by GitBox <gi...@apache.org>.
swebb2066 commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1382681660
On reflection, I am not sure I ever successfully build APR and APR-UTIL with a cross-compiler.
What I found works is to use the conan package manager (and a Artifactory server from JFrog). This allows APR and APR-UTIL to be built on the native system and uploaded to the server for use in cross-compilation builds.
The conan package manager can be used to install APR and APR-UTIL from the remote Artifactory server.
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[GitHub] [logging-log4cxx] rm5248 commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by "rm5248 (via GitHub)" <gi...@apache.org>.
rm5248 commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1527956454
If you have a specific issue compiling, please create a new issue. Every system is different, but the process of cross-compiling should be similar for all systems.
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[GitHub] [logging-log4cxx] LOCNNIL commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by GitBox <gi...@apache.org>.
LOCNNIL commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1383042835
> libESMTP is completely optional.
>
> If it's complaining about that, you likely have it installed on your build system - it is only used if it is found.
>
> The check happens [here](https://github.com/apache/logging-log4cxx/blob/master/src/main/include/CMakeLists.txt#L125), perhaps this is not working correctly when cross-compiling.
So if I just comment this part I will be able to cross-compile successfully? If yes, I'll gonna try it and post here the results.
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[GitHub] [logging-log4cxx] rm5248 commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by GitBox <gi...@apache.org>.
rm5248 commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1381888942
libESMTP is completely optional.
If it's complaining about that, you likely have it installed on your build system - it is only used if it is found.
The check happens [here](https://github.com/apache/logging-log4cxx/blob/master/src/main/include/CMakeLists.txt#L125), perhaps this is not working correctly when cross-compiling.
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[GitHub] [logging-log4cxx] swebb2066 commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by GitBox <gi...@apache.org>.
swebb2066 commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1382607334
> 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:
> /home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/src/APR_INCLUDE_DIR
> used as include directory in directory /home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/src/main/cpp
> /home/lincoln/cross_compile/source/apache-log4cxx-1.0.0/src/APR_UTIL_INCLUDE_DIR
You need to build APR and APR-UTIL with your cross-compiler.
To cross-compile APR you will need a triplet file that locates the tool chain and sets --host and --cache parameters of "./configure".
The .cache file must have been generated on the targeted host using "./configure -C".
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[GitHub] [logging-log4cxx] rm5248 commented on issue #176: Error when Cross-compiling library for ARMv7l
Posted by GitBox <gi...@apache.org>.
rm5248 commented on issue #176:
URL: https://github.com/apache/logging-log4cxx/issues/176#issuecomment-1381120176
Are you using `pkgconfig` to compile other code and find the libraries? If I remember correctly you need to set the `PKG_CONFIG_PATH` and/or `PKG_CONFIG_SYSROOT_DIR` variables(see also this [stackoverflow](https://stackoverflow.com/a/9234452) post).
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