Trying to build a crossgcc hosted by i386-linux and target alpha-linux

[Richard Lefebvre <rick at CERCA dot UMontreal dot CA>]

Hi,

I'm trying to build a cross compiler with target alpha-linux on an intel
linux. The host machine is a pentium III with RedHat 6.2 for Intel and
the binary generated by the cross-compiler will be installed on an Alpha
with RedHat 6.2 for Alpha.

I have tried what is in section 4.1 of the FAQ but I'm not getting pass
building gcc. I went through some of the archives in the mailing list
an found about linking include to the newlib include. I do that but then
I find that newlib-1.X doesn't know about alpha CPUs (first hint, it
doesn't know which endian it is). I decided to go with glibc. But
this time the include link trick doesn't work, the glibc-X/include
doesn't look the same as it will be when installed.

I read more in the archive, and find out that to build a binary I will
need crt*.o files and stuff. At that point, I decide to get some of the
RedHat-alpha RPMs to get the crt*.o files and the includes.
kernel-headers-2.2.14-6.0.alpha.rpm
glibc-2.1.3-16.alpha.rpm
glibc-devel-2.1.3-16.alpha.rpm

I installed these RPMs (in a seperate root), make some apropriate links.
Now I get pretty far in the compilation but still no crosscompiler.
I get to the following error:

make[2]: Leaving directory `/opt/cross-alpha/SRC/Build-gcc/alpha-linux/libio'
cd ../libiberty ; make "SHELL=/bin/sh" "INSTALL=/bin/sh
/opt/cross-alpha/SRC/gcc-2.95.3/install-sh -c" "INSTALL_DATA=/bin/sh
/opt/cross-alpha/SRC/gcc-2.95.3/install-sh -c -m 644" "INSTALL_PROGRAM=/bin/sh
/opt/cross-alpha/SRC/gcc-2.95.3/install-sh -c " "prefix=/opt/cross-alpha"
"exec_prefix=/opt/cross-alpha" "tooldir=/opt/cross-alpha/alpha-linux"
"gxx_include_dir=/opt/cross-alpha/include/g++-3"
"libsubdir=/opt/cross-alpha/lib/gcc-lib/alpha-linux/2.95.3"
"gcc_version=2.95.3"
"gcc_version_trigger=/opt/cross-alpha/SRC/gcc-2.95.3/gcc/version.c"
"AR=alpha-linux-ar" "AR_FLAGS=rc" "CC=/opt/cross-alpha/SRC/Build-gcc/gcc/xgcc
-B/opt/cross-alpha/SRC/Build-gcc/gcc/ -B/opt/cross-alpha/alpha-linux/bin/"
"CXX=/opt/cross-alpha/SRC/Build-gcc/gcc/xgcc
-B/opt/cross-alpha/SRC/Build-gcc/gcc/ -B/opt/cross-alpha/alpha-linux/bin/"
"CFLAGS=-g -O2" "CXXFLAGS=-g -O2 -fvtable-thunks -D_GNU_SOURCE"
"NM=alpha-linux-nm" "RANLIB=alpha-linux-ranlib" "LIBCFLAGS=-g -O2"
"LIBCXXFLAGS=-g -O2 -fvtable-thunks -D_GNU_SOURCE -fno-implicit-templates"
"LOADLIBES=" "LDFLAGS="
"MAKEINFO=/opt/cross-alpha/SRC/Build-gcc/texinfo/makeinfo/makeinfo "
"SHLIB=libstdc++.so.2.10.0" "SHCURSES=" "RUNTESTFLAGS="
make[2]: Entering directory
`/opt/cross-alpha/SRC/Build-gcc/alpha-linux/libiberty'
make[2]: *** No targets specified and no makefile found.  Stop.
make[2]: Leaving directory
`/opt/cross-alpha/SRC/Build-gcc/alpha-linux/libiberty'
make[1]: *** [../libiberty/libiberty.a] Error 2
make[1]: Leaving directory
`/opt/cross-alpha/SRC/Build-gcc/alpha-linux/libstdc++'
make: *** [all-target-libstdc++] Error 2


There are no Makefile in alpha-linux/libiberty because of the following
error (in alpha-linux/libiberty/config.log):

configure:1765: /opt/cross-alpha/SRC/Build-gcc/gcc/xgcc
-B/opt/cross-alpha/SRC/Build-gcc/gcc/ -B/opt/cross-alpha/alpha-linux/bin/ -o
conftest -g -O2   conftest.c  1>&5
/opt/cross-alpha/alpha-linux/bin/ld: cannot find /lib/libc.so.6.1
collect2: ld returned 1 exit status

the thing is here, I had the same message before about /lib/crt0.o for which
I created a link into the library path, and I did the same for libc.so.6.1

So now, I'm short of answers. Am I expecting to much to be able the create
a cross-compiler that will generate an "a.out" to be ran another platform?

Below is a script equivalant of what I have done so far:

############################################################
#!/bin/sh
TARGETDIR=/opt/cross-alpha
TARGET=alpha-linux

# Installing Linux Redhat alpha RPMs in TARGETDIR
# Assuming that RPMs are allready in TARGETDIR/RPMS
mkdir -p $TARGETDIR/var/lib/rpm
cd $TARGETDIR/RPMS
RPMCOMMAND="rpm --ignorearch --nodeps --noscripts --notriggers --root
$TARGETDIR -ivh"
$RPMCOMMAND kernel-headers-2.2.14-6.0.alpha.rpm
$RPMCOMMAND glibc-2.1.3-16.alpha.rpm
$RPMCOMMAND glibc-devel-2.1.3-16.alpha.rpm
# because of --noscripts --notriggers the following link is missing
cd $TARGETDIR/usr/src
ln -s linux-2.2.14/ linux

# making links to installed RPM
# The includes...
mkdir -p $TARGETDIR/$TARGET
cd $TARGETDIR/$TARGET
ln -s ../usr/include include

# The object files *crt*.o libc*
mkdir -p $TARGETDIR/$TARGET/lib
cd $TARGETDIR/$TARGET/lib
ln -s ../../usr/lib/* .
ln -s ../../lib/* .

# creation of directory so gcc go down into the directory and ../../../.. back
up
mkdir -p $TARGETDIR/lib/gcc-lib/alpha-linux/2.95.3

PATH=$TARGETDIR/bin:$PATH
export PATH

# Now building stuff
# Assuming that the sources have already been untared in TARGETDIR/SRC
SRCBINUTILS=binutils-2.10.1
SRCGCC=gcc-2.95.3
SRCLIBC=glibc-2.1.3
cd $TARGETDIR/SRC

mkdir -p $TARGETDIR/SRC/Build-binutils
cd $TARGETDIR/SRC/Build-binutils
../$SRCBINUTILS/configure --target=alpha-linux --prefix=/opt/cross-alpha -v
make all install

mkdir -p $TARGETDIR/SRC/Build-gcc
cd $TARGETDIR/SRC/Build-gcc
../$SRCGCC/configure --target=alpha-linux --prefix=/opt/cross-alpha -v
make all install


-- 
Richard Lefebvre, Sys-admin, CERCA, (514)369-5224            "Don't Panic"
Richard.Lefebvre(@AROBAS)cerca(.POINT)umontreal(.POINT)ca       -- THGTTG
http://www.CERCA.UMontreal.CA/~rick/

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