FW: Trying to build gcc cross compiler from linux to freebsd‏

[Niccolò Ferrari]

Hi another time,
The toolchain built works fine for 64bit instruction  set, but if I specify -m32 it return errors: 
$ x86_64-freebsd10.1-gcc  -m32 test.c -o test  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
skipping incompatible  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/libgcc.a when  
searching for -lgcc  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
skipping incompatible /usr/local/sysroot/freebsd10.1/usr/lib/libgcc.a  
when searching for -lgcc  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
skipping incompatible /usr/local/sysroot/freebsd10.1/usr/lib/libgcc.a  
when searching for -lgcc  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
cannot find -lgcc  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
skipping incompatible  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/lib/libgcc_s.so  
when searching for -lgcc_s  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
skipping incompatible  
/usr/local/sysroot/freebsd10.1/usr/lib/libgcc_s.so when searching for  
-lgcc_s  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
skipping incompatible  
/usr/local/sysroot/freebsd10.1/usr/lib/libgcc_s.so when searching for  
-lgcc_s  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
cannot find -lgcc_s  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
skipping incompatible /usr/local/sysroot/freebsd10.1/lib/libc.so.7 when  
searching for /lib/libc.so.7  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
cannot find /lib/libc.so.7 inside /usr/local/sysroot/freebsd10.1  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
skipping incompatible  
/usr/local/sysroot/freebsd10.1/usr/lib/libc_nonshared.a when searching  
for /usr/lib/libc_nonshared.a  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
cannot find /usr/lib/libc_nonshared.a inside  
/usr/local/sysroot/freebsd10.1  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
skipping incompatible  
/usr/local/sysroot/freebsd10.1/usr/lib/libssp_nonshared.a when  
searching for /usr/lib/libssp_nonshared.a  
/usr/local/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/../../../../x86_64-freebsd10.1/bin/ld:  
cannot find /usr/lib/libssp_nonshared.a inside  
/usr/local/sysroot/freebsd10.1 collect2: error: ld returned 1 exit  
status but I make gcc with --enable-multilib, and in my sysroot there  
is usr/lib32.

So why it not work? P.S. I also tried to build a  
i686-freebsd10.1 cross-compiler but it also fail during make process  
:(. Thanks, Niccolò

> ----------------------------------------> Date:  
> Wed, 18 Mar 2015 14:04:51 +0200> From: kai.ruottu@wippies.com> To:  
> niccolo.ferrari@hotmail.it> Subject: Re: Trying to build gcc cross  
> compiler from linux to freebsd‏>> 18.3.2015, 4:15, Niccolò Ferrari  
> kirjoitti:>> Ok, sorry I sent you so many emails, but finally I  
> compiled and installed with no errors the tool-chain!>> No worry, I  
> sleeped while those came so I didn't even read them :)>>> The second  
> problem was related to symlinks in sysroot path: they referenced to a  
> absolute path obviously not valid on my system.>> I seemingly forgot  
> this "only native" attitude in some systems. Some> Linuces also have  
> symlinks to the absolute> '/lib' and '/lib64' or something in their  
> installed glibcs. Building and> installing a glibc from its sources  
> however> creates symlinks to the relative '../../lib*' and at least  
> the Red Hat> derivatives like Fedora and CentOS have used> this  
> default scheme. But the Debian and Ubuntu and probably also SuSE> have  
> used those absolute addresses. So> they must be fixed in a  
> crosscompiler. Only the startups (crt*.o) and> basic libc/libm files  
> will be automatically handled> with the '--with-sysroot=' logic in  
> GCC...>>> I solved the problem with a simple bash script:>>>>  
> #!/bin/bash>> for fff in `find . -type l ! -exec test -e {} \;  
> -print`; do>> echo "found link $fff">> if [ ! -e "$fff" ]; then>>  
> echo "found broken link $fff">> link=$(readlink "$fff")>> echo "link  
> $link">> rm "$fff">> echo "rm $fff">> ln -sf "$SYSROOT_PATH"/"$link"  
> "$fff">> echo "link done">> fi>> done>> exit 0>>>> I don't know  
> if there are more elegant way to do this, but now, with this script it  
> worked!>> I tried also to compile a test.c and a test.cpp and run in  
> freebsd.>> I used 'grep' to find the symlinks to the absolute '/lib'  
> and then> edited a script to fix the symlinks :>> ln -f -s  
> ../../lib/libalias.so.7 libalias.so> ln -f -s ../../lib/libavl.so.2  
> libavl.so> ln -f -s ../../lib/libbegemot.so.4 libbegemot.so> ln -f -s  
> ../../lib/libbsdxml.so.4 libbsdxml.so> ln -f -s ../../lib/libcam.so.6  
> libcam.so> ln -f -s ../../lib/libcrypto.so.7 libcrypto.so> ln -f -s  
> ../../lib/libcrypt.so.5 libcrypt.so> ln -f -s ../../lib/libctf.so.2  
> libctf.so> ln -f -s ../../lib/libcxxrt.so.1 libcxxrt.so> ln -f -s  
> ../../lib/libdevstat.so.7 libdevstat.so> ln -f -s  
> ../../lib/libdtrace.so.2 libdtrace.so> ln -f -s ../../lib/libedit.so.7  
> libedit.so> ln -f -s ../../lib/libgcc_s.so.1 libgcc_s.so> ln -f -s  
> ../../lib/libgeom.so.5 libgeom.so> ln -f -s ../../lib/libipsec.so.4  
> libipsec.so> ln -f -s ../../lib/libipx.so.5 libipx.so> ln -f -s  
> ../../lib/libjail.so.1 libjail.so> ln -f -s ../../lib/libkiconv.so.4  
> libkiconv.so> ln -f -s ../../lib/libkvm.so.6 libkvm.so> ln -f -s  
> ../../lib/libmd.so.6 libmd.so> ln -f -s ../../lib/libm.so.5 libm.so>  
> ln -f -s ../../lib/libncurses.so.8 libncurses.so> ln -f -s  
> ../../lib/libncursesw.so.8 libncursesw.so> ln -f -s  
> ../../lib/libnvpair.so.2 libnvpair.so> ln -f -s ../../lib/libpcap.so.8  
> libpcap.so> ln -f -s ../../lib/libreadline.so.8 libreadline.so> ln -f  
> -s ../../lib/libsbuf.so.6 libsbuf.so> ln -f -s ../../lib/libssp.so.0  
> libssp.so> ln -f -s ../../lib/libthr.so.3 libthr.so> ln -f -s  
> ../../lib/libufs.so.6 libufs.so> ln -f -s ../../lib/libulog.so.0  
> libulog.so> ln -f -s ../../lib/libumem.so.2 libumem.so> ln -f -s  
> ../../lib/libutil.so.9 libutil.so> ln -f -s ../../lib/libuutil.so.2  
> libuutil.so> ln -f -s ../../lib/libzfs_core.so.2 libzfs_core.so> ln  
> -f -s ../../lib/libzfs.so.2 libzfs.so> ln -f -s  
> ../../lib/libzpool.so.2 libzpool.so> ln -f -s ../../lib/libz.so.6  
> libz.so>> I compared this with the earlier one for FreeBSD 7.2 for  
> x86_64 and> seemingly all the shared library names> (in '/lib) were  
> changed so editing the earlier script wouldn't have made> the task  
> much quicker (maybe 5-10> minutes used to create this). Maybe your  
> script to automatically edit> those wrong symlinks could be better...  
> >> My old 32-bit AthlonXP 2.8 GHz PC with CentOS 5.11 Linux is just  
> now> compiling the libstdc++-v3 part in> gcc-4.9.2, no problems this  
> far....>> I unpacked only the 'base.txz' and 'lib32.txz' packages and  
> seemingly in> them is quite a lot unnecessary> stuff. The  
> '/usr/bin/cc' didn't seem to be GCC at all, I tried to see> which  
> extra configure options the> "native GCC for FreeBSD 10.1 / x86_64"  
> had used but when there wasn't> that, I just used the basic> options  
> and trusted the system's defaults to be OK....>> BTW. The build here  
> went trough without any problems. Here my configure> options can be  
> seen :>> [root@localhost ~]# x86_64-freebsd10.1-gcc-4.9 -v> Using  
> built-in specs.> COLLECT_GCC=x86_64-freebsd10.1-gcc-4.9>  
> COLLECT_LTO_WRAPPER=/opt/cross/lib/gcc/x86_64-freebsd10.1/4.9.2/lto-wrapper  
> > Target: x86_64-freebsd10.1> Configured with: ../configure  
> --build=i686-linux-gnu> --host=i686-linux-gnu  
> --target=x86_64-freebsd10.1 --prefix=/opt/cross>  
> --libdir=/opt/cross/lib --libexecdir=/opt/cross/lib>  
> --with-sysroot=/opt/host-FreeBSD10.1_x86_64 --enable-languages=c,c++>  
> --enable-shared --enable-threads=posix --disable-nls>  
> --enable-version-specific-runtime-libs>  
> --with-gxx-include-dir=/opt/cross/include/c++/4.9.2>  
> --program-prefix=x86_64-freebsd10.1- --program-suffix=-4.9> Thread  
> model: posix> gcc version 4.9.2 (GCC by Kai Ruottu)>