{{tag>Brouillon}}

= Notes cross-compilation


Voir : 
https://blog.svgames.pl/article/cross-compiling-c-programs-for-ms-windows-using-mingw


<code bash>
apt-get install crossbuild-essential-i386
</code>

Ou 
<code bash>
cat /etc/apt/sources.list |grep debian |sed -e 's/stretch/jessie/g' |grep -v deb-src > /etc/apt/sources.list.d/jessie.list

dpkg --add-architecture i386
apt-get update

apt-get install mingw32 mingw32-binutils
#apt-get install mingw-w64
</code>

''plop.cpp''
<code cpp>
#include <iostream>

int main(int argc, char** argv)
{
    std::cout << "Hello" << std::endl;
    return 0;
}
</code>


<code bash>
i586-mingw32msvc-g++ -o plop.exe plop.cpp
</code>

On windows error libstdc++-6.dll missing

Pour le plus avoir l'erreur \\
Nous ne voulons plus de DLL, donc mettons tout en static

<code bash>
i586-mingw32msvc-g++ -o plop.exe plop.cpp
</code>

<code bash>
aptitude search '~n curl ~r i386'

apt-get source curl:i386
apt-get source libcurl3:i386 libcurl3-gnutls:i386
cd curl

#apt-get install crossbuild-essential-i386

export ARCH=i386 CROSS_COMPILE=arm-linux
</code>


<code bash>
make -f lazy_makefile CC=i686-w64-mingw32-gcc
./configure --host=i686-w64-mingw32 --enable-shared --disable-install-doc
./configure --host=x86_64-w64-mingw32 --build=x86_64-w64-mingw32 
./configure --host=x86_64-w64-mingw32 --disable-magic --disable-cuckoo --with-crypto CFLAGS=-I/root/openssl/include LDFLAGS=-L/root/openssl/lib --enable-static

The right way to do this is to add the ''-static'' flag to an ''LDFLAGS'' variable. For all targets: ''AM_LDFLAGS=-static''

export CC=i586-mingw32msvc-cc
./configure --host=i686-w64-mingw32 --enable-static

export CFLAGS='-static'

make V=1 curl_LDFLAGS=-all-static


git clone -b curl-tiny-7.72 https://github.com/curl/curl.git
</code>

<code ->
libtool:   error: Could not determine the host path corresponding to
libtool:   error:   '/home/jibe/code/i386/curl-7.52.1/lib/.libs'
libtool:   error: Continuing, but uninstalled executables may not work.
libtool:   error: Could not determine the host path corresponding to
libtool:   error:   '/home/jibe/code/i386/curl-7.52.1/lib/.libs:/usr/local/lib:/usr/local/bin'
libtool:   error: Continuing, but uninstalled executables may not work.
make[2]: Leaving directory '/home/jibe/code/i386/curl-7.52.1/src'
make[1]: Leaving directory '/home/jibe/code/i386/curl-7.52.1/src'
Making all in include
make[1]: Entering directory '/home/jibe/code/i386/curl-7.52.1/include'
Making all in curl
make[2]: Entering directory '/home/jibe/code/i386/curl-7.52.1/include/curl'
make  all-am
make[3]: Entering directory '/home/jibe/code/i386/curl-7.52.1/include/curl'
make[3]: Leaving directory '/home/jibe/code/i386/curl-7.52.1/include/curl'
make[2]: Leaving directory '/home/jibe/code/i386/curl-7.52.1/include/curl'
make[2]: Entering directory '/home/jibe/code/i386/curl-7.52.1/include'
make[2]: Nothing to be done for 'all-am'.
make[2]: Leaving directory '/home/jibe/code/i386/curl-7.52.1/include'
make[1]: Leaving directory '/home/jibe/code/i386/curl-7.52.1/include'
make[1]: Entering directory '/home/jibe/code/i386/curl-7.52.1'
make[1]: Nothing to be done for 'all-am'.
make[1]: Leaving directory '/home/jibe/code/i386/curl-7.52.1'
</code>

<code ->
$ find . -iname curl.exe
./curl-7.52.1/src/.libs/curl.exe
./curl-7.52.1/src/curl.exe
</code>

Le bon est celui qui est dans ''src/.libs/''


<code bash>
export AM_LDFLAGS='-static'

git clone https://github.com/curl/curl.git
cd curl
git tag
git checkout curl-7_9_8

export ROOTDIR="${PWD}"
cd curl
#$ export CROSS_COMPILE="arm-none-linux-gnueabi"
#export CROSS_COMPILE="stable-i686-pc-windows-gnu"
export CROSS_COMPILE="i686-w64-mingw32"
#export CPPFLAGS="-I${ROOTDIR}/openssl/include -I${ROOTDIR}/zlib/include"
export CPPFLAGS="-I${ROOTDIR}/openssl/include/openssl -I${ROOTDIR}/openssl/include/crypto -I${ROOTDIR}/openssl/include/internal"
export LDFLAGS="-L${ROOTDIR}/openssl/libs -L${ROOTDIR}/zlib/libs"
export AR=${CROSS_COMPILE}-ar
export AS=${CROSS_COMPILE}-as
export LD=${CROSS_COMPILE}-ld
export RANLIB=${CROSS_COMPILE}-ranlib
export CC=${CROSS_COMPILE}-gcc
export NM=${CROSS_COMPILE}-nm
export LIBS="-lssl -lcrypto"
./buildconf
./configure --prefix=${ROOTDIR}/build --target=${CROSS_COMPILE} --host=${CROSS_COMPILE} --build=i586-pc-linux-gnu --with-ssl --with-zlib
</code>

<code bash>
sudo apt-get build-dep curl
</code>


== Pb

=== Err

''m32test.c''
<code c>
#include <stdio.h>
int main()
{
   printf("This works\n");
   return 0;
}
</code>

<code ->
$ gcc -m32 -o m32test m32test.c
In file included from /usr/include/stdio.h:27:0,
                 from m32test.c:2:
/usr/include/features.h:364:25: fatal error: sys/cdefs.h: No such file or directory
 #  include <sys/cdefs.h>
                         ^
compilation terminated.
</code>

<code ->
# gcc -m32 -o m32test m32test.c                                                                                                                                              
In file included from m32test.c:1:                                                                                                                                                            
/usr/include/stdio.h:27:10: fatal error: bits/libc-header-start.h: No such file or directory
 #include <bits/libc-header-start.h>                                                                                                                                              
          ^~~~~~~~~~~~~~~~~~~~~~~~~~                                                                                                         
compilation terminated.
</code>

Solution
<code bash>
apt-get install gcc-multilib
</code>


=== Err undefined reference to

Pb linking error

https://stackoverflow.com/questions/50471481/how-to-cross-compile-from-linux-to-32-bit-windows-executable