Simple cross build fails out of the box on Fedora

[Jan Beulich]

On 11.03.2026 20:51, Rot127 wrote:
> I try to build binutils on Fedora but configure fails already to compile 
> the test program.
> I cannot for the sake of it see what the problem is according to the 
> `configure --help` docs.
> 
> Reproducible with:
> 
> ```
> ./configure \
>    --host=s390x-linux-gnu \
>    --target=s390x-linux-gnu \
>    --with-build-sysroot=/usr/s390x-redhat-linux/sys-root/fc42/usr
> ```

A couple of observations, but I'm nowhere near a specialist: Isn't the
trailing /usr wrong here, considering the ld output at the bottom?

> Build error:
> 
> ```
> gcc version 15.2.1 20250808 (Red Hat Cross 15.2.1-1) (GCC)
> configure:4654: $? = 0
> configure:4643: s390x-linux-gnu-gcc -V >&5
> s390x-linux-gnu-gcc: error: unrecognized command-line option '-V'
> s390x-linux-gnu-gcc: fatal error: no input files
> compilation terminated.
> configure:4654: $? = 1
> configure:4643: s390x-linux-gnu-gcc -qversion >&5
> s390x-linux-gnu-gcc: error: unrecognized command-line option 
> '-qversion'; did you mean '--version'?
> s390x-linux-gnu-gcc: fatal error: no input files
> compilation terminated.
> configure:4654: $? = 1
> configure:4674: checking whether the C compiler works
> configure:4696: s390x-linux-gnu-gcc    conftest.c  >&5

Judging from what's visible here and what I can find in configure.ac,
--with-build-sysroot, which merely sets SYSROOT_CFLAGS_FOR_TARGET, does
not take any effect here. That env var looks to be used only later in
the Makefile.

Finally, "simple cross build" also doesn't look quite right. Aiui that
names the case where you pass --target, but not --host.

Jan

> /usr/bin/s390x-linux-gnu-ld: cannot find crt1.o: No such file or directory
> /usr/bin/s390x-linux-gnu-ld: cannot find crti.o: No such file or directory
> /usr/bin/s390x-linux-gnu-ld: cannot find -lc: No such file or directory
> /usr/bin/s390x-linux-gnu-ld: cannot find crtn.o: No such file or directory
> collect2: error: ld returned 1 exit status
> configure:4700: $? = 1
> configure:4738: result: no
> configure: failed program was:
> | /* confdefs.h */
> | #define PACKAGE_NAME ""
> | #define PACKAGE_TARNAME ""
> | #define PACKAGE_VERSION ""
> | #define PACKAGE_STRING ""
> | #define PACKAGE_BUGREPORT ""
> | #define PACKAGE_URL ""
> | /* end confdefs.h.  */
> |
> | int
> | main ()
> | {
> |
> |   ;
> |   return 0;
> | }
> configure:4743: error: in 
> `/home/user/repos/rz-framework-cmp/data/binutils-2.46.0':
> configure:4745: error: C compiler cannot create executables
> See `config.log' for more details
> ```
> 
> All the libraries and bins live happily at their place:
> 
> ```
>  > ll /usr/bin/s390x-linux-gnu-gcc
> -rwxr-xr-x. 1 root root 1.9M Aug 13  2025 /usr/bin/s390x-linux-gnu-gcc
> 
>  > ll /usr/s390x-redhat-linux/sys-root/fc42/usr/lib64/crt*
> -rw-r--r--. 1 root root 2.8K Jan 23 01:00 
> /usr/s390x-redhat-linux/sys-root/fc42/usr/lib64/crt1.o
> -rw-r--r--. 1 root root 1.7K Jan 23 01:00 
> /usr/s390x-redhat-linux/sys-root/fc42/usr/lib64/crti.o
> -rw-r--r--. 1 root root 1.3K Jan 23 01:00 
> /usr/s390x-redhat-linux/sys-root/fc42/usr/lib64/crtn.o
> ```
> 
> Would really appreciate any help.
> 
>