Subject: Re: [bug#36477] [PATCH 26/31] gnu: tcsh: Fix cross-compilation.

From: Mathieu Othacehe <[email-masked]>
Date: Thu, 25 Jul 2019 17:23:27 +0200

>> @@ -356,6 +357,14 @@ written by Paul Haahr and Byron Rakitzis.")
>>      (arguments
>>       `(#:phases
>>          (modify-phases %standard-phases
>> +          ,@(if (%current-target-system)
>> +                '((add-before 'configure 'set-cross-cc
>> +                     (lambda _
>> +                       (substitute* "configure"
>> +                         (("CC_FOR_GETHOST=\"cc\"")
>> +                          "CC_FOR_GETHOST=\"gcc\""))
>> +                       #t)))
>> +                '())
>
> Actually, can we pass this in #:configure-flags instead?  Maybe even
> also for the native build?

Sadly I think we cannot. The problematic piece is:

--8<---------------cut here---------------start------------->8---
dnl Require build CC to create gethost helper when cross building
if test "x${cross_compiling}" = xyes ; then
  CC_FOR_GETHOST="cc"
else
  CC_FOR_GETHOST="\$(CC)"
fi
AC_SUBST(CC_FOR_GETHOST)
--8<---------------cut here---------------end--------------->8---

CC_FOR_GETHOST cannot be overwritten by a configure-flag.

Mathieu