Re: [PATCH] tools/hvmloader: link errno.h from xen internal

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 31/10/14 02:18, Tiejun Chen wrote:
> We will use some error numbers in hvmloader so here just link
> this head file from xen.
>
> Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>

We already use stdint, stdarg, stdarg and error (in xenbus.c) from the
build environment.

All of these are safe from an embedded point of view, which is
essentially what we are doing with hvmloader.

I highly suggest we just go with the environments error.h and be done
with it.  C99 is very nice to us in this way.

~Andrew

> ---
>  .gitignore                        | 1 +
>  tools/firmware/hvmloader/Makefile | 8 ++++++--
>  tools/firmware/hvmloader/util.h   | 1 +
>  3 files changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/.gitignore b/.gitignore
> index b24e905..52c3038 100644
> --- a/.gitignore
> +++ b/.gitignore
> @@ -127,6 +127,7 @@ tools/firmware/hvmloader/acpi/ssdt_*.h
>  tools/firmware/hvmloader/hvmloader
>  tools/firmware/hvmloader/roms.h
>  tools/firmware/hvmloader/roms.inc
> +tools/firmware/hvmloader/errno.h
>  tools/firmware/rombios/BIOS-bochs-[^/]*
>  tools/firmware/rombios/_rombios[^/]*_.c
>  tools/firmware/rombios/rombios[^/]*.s
> diff --git a/tools/firmware/hvmloader/Makefile b/tools/firmware/hvmloader/Makefile
> index 46a79c5..2e0f062 100644
> --- a/tools/firmware/hvmloader/Makefile
> +++ b/tools/firmware/hvmloader/Makefile
> @@ -84,9 +84,13 @@ ROMS += $(SEABIOS_ROM)
>  endif
>  
>  .PHONY: all
> -all: subdirs-all
> +all: subdirs-all .dir
>  	$(MAKE) hvmloader
>  
> +.dir:
> +	@rm -rf errno.h
> +	ln -sf $(XEN_ROOT)/xen/include/xen/errno.h .
> +
>  ovmf.o rombios.o seabios.o hvmloader.o: roms.inc
>  smbios.o: CFLAGS += -D__SMBIOS_DATE__="\"$(shell date +%m/%d/%Y)\""
>  
> @@ -136,7 +140,7 @@ endif
>  
>  .PHONY: clean
>  clean: subdirs-clean
> -	rm -f roms.inc roms.inc.new acpi.h
> +	rm -f roms.inc roms.inc.new acpi.h errno.h
>  	rm -f hvmloader hvmloader.tmp *.o $(DEPS)
>  
>  -include $(DEPS)
> diff --git a/tools/firmware/hvmloader/util.h b/tools/firmware/hvmloader/util.h
> index a70e4aa..1352025 100644
> --- a/tools/firmware/hvmloader/util.h
> +++ b/tools/firmware/hvmloader/util.h
> @@ -6,6 +6,7 @@
>  #include <stddef.h>
>  #include <xen/xen.h>
>  #include <xen/hvm/hvm_info_table.h>
> +#include "errno.h"
>  
>  #define __STR(...) #__VA_ARGS__
>  #define STR(...) __STR(__VA_ARGS__)