glibc-2.2{8,9} multiarch build failure on x86_64 with gcc 9

[Carlos O'Donell]

On 5/1/19 2:24 PM, Arvind Sankar wrote:
> gcc 9 when configured for fortran installs ISO_Fortran_Binding.h in
> 	gfor_cdir = $(libdir)/gcc/$(target_alias)/$(gcc_version)$(MULTISUBDIR)/include
> For x86_64's 32-bit architecture support, this creates a subdirectory named 'include'
> inside $(libsubdir)/32 which didn't use to exist in gcc 8.
This doesn't seem correct.

I would have expected the header to exist under the target name, for example:

/usr/lib/gcc/i686-redhat-linux/9/include/ISO_Fortran_binding.h

This way it doesn't conflict with other uses.

Perhaps there is enough variability in the way you build, package, and install this
that it can break in some configurations.

I think the gcc community needs to comment on this.

-- 
Cheers,
Carlos.