Hello, On Tue, 10 Aug 2021, Jakub Jelinek via Gcc-patches wrote:
> > +# Place ISO_Fortran_binding.h also under include/ in the build directory > > such > > +# that it can be used for in-built-tree testsuite runs without > > interference of > > +# other files in the build dir - like intrinsic .mod files or other .h > > files. > > ISO_Fortran_binding.h: $(srcdir)/ISO_Fortran_binding-1-tmpl.h \ > > $(srcdir)/ISO_Fortran_binding-2-tmpl.h \ > > $(srcdir)/ISO_Fortran_binding-3-tmpl.h \ > > @@ -1085,6 +1088,8 @@ ISO_Fortran_binding.h: > > $(srcdir)/ISO_Fortran_binding-1-tmpl.h \ > > $(COMPILE) -E -dD $(srcdir)/ISO_Fortran_binding-2-tmpl.h \ > > | grep '^#define CFI_type' >> $@ > > cat $(srcdir)/ISO_Fortran_binding-3-tmpl.h >> $@ > > + $(MKDIR_P) include > > + cp $@ include/ISO_Fortran_binding.h > > I see many Makefile.* in GCC doing rm -f file before cp whatever file, > but don't know if that is just trying to be extra cautious or if it is > needed for portability. coreutils cp (and what POSIX says) is that > overwriting the destination file should be fine and shouldn't cause > failures, at least when the destination is writable. I think this is to deal cautiously with symlinks: if the destination filename is a symlink to an existing file that target file is overwritten by cp, not the symlink (which continues to point to the now changed target file). Ciao, Michael.
