http://bugzilla.gdcproject.org/show_bug.cgi?id=63

--- Comment #1 from Iain Buclaw <ibuclaw@gdcproject.org> 2013-06-16 10:28:29 UTC ---
This is gcc configure scripts related.  Have tweaked the config-lang.in scripts so that the dependency on c++ is explicitly as a stage1 language only.  However it looks like the gcc ./configure adds it into enabled_languages regardless...

Though not entirely convinced that not building c++ would save a huge amount of time in the overall build in the whole grand scheme of things either.

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http://bugzilla.gdcproject.org/show_bug.cgi?id=63

Ketmar Dark <ketmar@ketmar.no-ip.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ketmar@ketmar.no-ip.org

--- Comment #2 from Ketmar Dark <ketmar@ketmar.no-ip.org> ---
(In reply to Brad Roberts from comment #0)
> I'd really like that time back.
you can get it with the following patch.
WARNING! only use it with "--disable-bootstrap --enable-languages=d"!

diff --git a/gcc/d/config-lang.in b/gcc/d/config-lang.in index 0a76bea..68b2ada 100644
--- a/gcc/d/config-lang.in
+++ b/gcc/d/config-lang.in
@@ -30,7 +30,7 @@ target_libs="target-libphobos target-zlib
target-libbacktrace"

 # The D frontend is written in C++, so we need to build the C++
 # compiler during stage 1.
-lang_requires_boot_languages=c++
+#lang_requires_boot_languages=c++

 gtfiles="\$(srcdir)/d/d-builtins.cc \$(srcdir)/d/d-lang.cc
\$(srcdir)/d/d-lang.h"

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http://bugzilla.gdcproject.org/show_bug.cgi?id=63

--- Comment #3 from Iain Buclaw <ibuclaw@gdcproject.org> ---
Brad, I can add a --running-autotester switch to the setup-gcc script that enables this behaviour.

Are you in favour?

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http://bugzilla.gdcproject.org/show_bug.cgi?id=63

--- Comment #4 from Iain Buclaw <ibuclaw@gdcproject.org> ---
I think it should now be possible to remove this.

C++ is now *the* boot language for gcc.  So by that measure it *must* be automatically enabled in bootstrapped builds.

Let me test...

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Timo Sintonen <t.sintonen@luukku.com> changed:

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                 CC|                            |t.sintonen@luukku.com

--- Comment #5 from Timo Sintonen <t.sintonen@luukku.com> ---
Not fully releted but...
When building a cross compiler, c++ for target is also built. The time is not
the issue there but c++ and its runtime library may not build in all systems.
If they build properly they may not work anyway. In addition, c++ runtime
requires libc for target to be installed before it is possible to start
compiling gcc.

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Iain Buclaw <ibuclaw@gdcproject.org> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Iain Buclaw <ibuclaw@gdcproject.org> ---
It is related.  The configure script for GCC seems to have a slightly odd logic for which languages it should enable in the stage1 phase.  It seems silly to me that lang_requires_boot_languages should even be considered in --disable-bootstrap builds, but hey ho...

The fix Brad has been waiting for - I can give you back that time when we meet at Dconf this year. :)

https://github.com/D-Programming-GDC/GDC/commit/10335c0c00b5b2d2a3c31eb7bf6c2ce7b5e7012b

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