Re: [PATCH] Don't include config.h for native helpers

[Rink Springer <rink@xxxxxxx>]

On Tue, May 22, 2018 at 06:57:07PM +0300, Baruch Siach wrote:
> From: Peter Korsgaard <peter@xxxxxxxxxxxxx>
> 
> config.h contains settings for the cross compiler (most importantly
> 32/64bit versions of functions), so don't include it when calling the
> native compiler to build the helpers.
> 
> Otherwise we get build errors like:
> 
> /usr/bin/gcc -include ../config.h -DBSD=1 -DSHELL -DIFS_BROKEN  -g -O2 -Wall    -o mkinit mkinit.c
> In file included from /usr/include/sys/stat.h:107,
>                  from /usr/include/fcntl.h:38,
>                  from mkinit.c:50:
> /usr/include/bits/stat.h:117: error: redefinition of ‘struct stat’
> In file included from /usr/include/fcntl.h:38,
>                  from mkinit.c:50:
> /usr/include/sys/stat.h:504: error: redefinition of ‘stat’
> /usr/include/sys/stat.h:455: note: previous definition of ‘stat’ was here
> 
> Signed-off-by: Peter Korsgaard <peter@xxxxxxxxxxxxx>
> [baruch: apply to Makefile.am; update Peter's email address]
> Signed-off-by: Baruch Siach <baruch@xxxxxxxxxx>
> ---
>  src/Makefile.am | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/src/Makefile.am b/src/Makefile.am
> index 139355e5b7e9..55780f4689da 100644
> --- a/src/Makefile.am
> +++ b/src/Makefile.am
> @@ -2,12 +2,11 @@ AM_YFLAGS = -d
>  
>  COMMON_CFLAGS = -Wall
>  COMMON_CPPFLAGS = \
> -	-include $(top_builddir)/config.h \
>  	-DBSD=1 -DSHELL \
>  	-DIFS_BROKEN
>  
>  AM_CFLAGS = $(COMMON_CFLAGS)
> -AM_CPPFLAGS = $(COMMON_CPPFLAGS)
> +AM_CPPFLAGS = -include $(top_builddir)/config.h $(COMMON_CPPFLAGS)
>  AM_CFLAGS_FOR_BUILD = -g -O2 $(COMMON_CFLAGS) 
>  AM_CPPFLAGS_FOR_BUILD = $(COMMON_CPPFLAGS)

I seem to recall that I encountered the same problem when cross-building
dash; however, I fixed it in a different way:

diff --git a/src/Makefile.am b/src/Makefile.am
index 139355e..ed18844 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -12,7 +12,7 @@ AM_CFLAGS_FOR_BUILD = -g -O2 $(COMMON_CFLAGS)
 AM_CPPFLAGS_FOR_BUILD = $(COMMON_CPPFLAGS)

 COMPILE_FOR_BUILD = \
-       $(CC_FOR_BUILD) $(DEFAULT_INCLUDES) $(AM_CPPFLAGS_FOR_BUILD) \
+       $(CC_FOR_BUILD) $(DEFAULT_INCLUDES) \
        $(CPPFLAGS_FOR_BUILD) \
        $(AM_CFLAGS_FOR_BUILD) $(CFLAGS_FOR_BUILD)

I am unsure what is the best solution here.

Regards,
Rink
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