cross-build problem

[Thomas Koeller]

Hi,

I am encountering problems using libtool-1.5.24 in a cross-build
environment (build system x86_64-pc-linux-gnu, target mips-linux-gnu).
I am trying to build the Linux-PAM-0.99.8.1 package. Building works
fine, but --mode=install fails.

Because I am cross-building, my CFLAGS and LDFLAGS variables contain
the --sysroot switch. When 'libtool --mode=install' is invoked, the
following happens:

libtool: install: warning: relinking `libpam_misc.la'
(cd /home/thomas/excite-userland/build/Linux-PAM-0.99.8.1/libpam_misc; /bin/sh 
../libtool  --tag=CC --mode=relink 
/opt/cross-gcc/mips-linux-gnu/4.2.1/bin/mips-linux-gnu-gcc 
-I/home/thomas/excite-userland/src/Linux-PAM-0.99.8.1/libpam/include 
-I/home/thomas/excite-userland/src/Linux-PAM-0.99.8.1/libpamc/include 
-I/home/thomas/excite-userland/src/Linux-PAM-0.99.8.1/libpam_misc/include 
-march=rm9000 -Os -fomit-frame-pointer 
--sysroot=/home/thomas/excite-userland/sys-root -W -Wall -Wbad-function-cast 
-Wcast-align -Wcast-qual -Wmissing-declarations -Wmissing-prototypes 
-Wpointer-arith -Wreturn-type -Wstrict-prototypes -Wwrite-strings -Winline 
-Wshadow --sysroot=/home/thomas/excite-userland/sys-root -Wl,--as-needed 
-Wl,-O1 -o libpam_misc.la -rpath /usr/lib -no-undefined -version-info 81:2:81 
-Wl,--version-script=/home/thomas/excite-userland/src/Linux-PAM-0.99.8.1/libpam_misc/libpam_misc.map
 help_env.lo misc_conv.lo ../libpam/libpam.la -inst-prefix-dir 
/home/thomas/excite-userland/sys-root)
/opt/cross-gcc/mips-linux-gnu/4.2.1/bin/mips-linux-gnu-gcc -shared  
.libs/help_env.o .libs/misc_conv.o  
-L/home/thomas/excite-userland/sys-root/usr/lib -L/usr/lib -lpam  -march=rm9000 
-Wl,--as-needed -Wl,-O1 
-Wl,--version-script=/home/thomas/excite-userland/src/Linux-PAM-0.99.8.1/libpam_misc/libpam_misc.map
 -Wl,-soname -Wl,libpam_misc.so.0 -o .libs/libpam_misc.so.0.81.2
/opt/cross-gcc/mips-linux-gnu/4.2.1/lib/gcc/mips-linux-gnu/4.2.1/../../../../mips-linux-gnu/bin/ld:
 skipping incompatible /lib/libc.so.6 when searching for /lib/libc.so.6
/opt/cross-gcc/mips-linux-gnu/4.2.1/lib/gcc/mips-linux-gnu/4.2.1/../../../../mips-linux-gnu/bin/ld:
 cannot find /lib/libc.so.6
collect2: ld returned 1 exit status
libtool: install: error: relink `libpam_misc.la' with the above command before 
installing it

As can be seen, the 'libtool --mode=relink' contains the '--sysroot'
switch, but the linker command line generated by libtool does not,
which leads to the well-known problem of the cross linker accessing
libc.so.6 on the build system. If I edit the linker command line and
manually add the '--sysroot' argument, it executes without problems.

I am not sufficiently familiar with libtool to be able to tell whether
this is a problem of libtool itself or the package I am building.

Thomas
-- 
Thomas Koeller
thomas at koeller dot dyndns dot org