Re: configure --with-as broken

[Alexandre Oliva <oliva at dcc dot unicamp dot br>]

Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> writes:

> Alexandre Oliva <oliva@dcc.unicamp.br> writes:
> |> Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> writes:
> |> 
> |> > The test in configure that checks the value of $AS should be skipped when
> |> > it is not an absolute file name, because $AS is always set due to
> |> > $GCC_FLAGS_TO_PASS in the toplevel Makefile.
> |> 
> |> But AS is only set as a make variable, not as an environment variable, 

> Surely it is passed in the environment by make.  *Note
> (make)Environment::.

But gcc/configure is not run by a sub-make, is it?  And if it is not,
this is a non-issue, because make only passes the environment down to
sub-makes, see:

TEST = foo
all: test test2 test3 test4
test:
	echo $$TEST
test2:
	$(MAKE) test
script:
	echo "#! /bin/sh" > $@
	echo 'echo $$TEST' >> $@
	chmod +x script
	cat script
test3: script
	./script
test4:
	$(MAKE) test3

Running this makefile with GNU make 3.76.1 and 3.77 would only print
blank lines whenever `foo' should be printed according to your
suggestion.  But then, other make programs, or older versions of GNU
make, may be broken with this respect.  Does anyone know of any make
program for which `make | grep foo' succeeds, i.e., prints at least
one line?

-- 
Alexandre Oliva
mailto:oliva@dcc.unicamp.br mailto:oliva@gnu.org mailto:aoliva@acm.org
http://www.dcc.unicamp.br/~oliva
Universidade Estadual de Campinas, SP, Brasil