[PATCH 3/3] Makefile: use FIXED_TIMESTAMP for mkstandalone if set

[Alexander Couzens]

mkstandalone sets timestamps for files which can be overriden by a 
fixed_timestamp.
This makes it possible to build reproducible builds for coreboot.

To build a reproducible build of grub for coreboot do:
make default_payload.elf FIXED_TIMESTAMP=1134242
---
 Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile.am b/Makefile.am
index 994ebbd..37a7cc4 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -403,7 +403,7 @@ bootcheck: $(BOOTCHECKS)
 
 if COND_i386_coreboot
 default_payload.elf: grub-mkstandalone grub-mkimage
-       pkgdatadir=. ./grub-mkstandalone --grub-mkimage=./grub-mkimage -O 
i386-coreboot -o $@ --modules='ahci pata ehci uhci ohci usb_keyboard usbms 
part_msdos xfs ext2 fat at_keyboard part_gpt usbserial_usbdebug cbfs' 
--install-modules='ls linux search configfile normal cbtime cbls memrw iorw 
minicmd lsmmap lspci halt reboot hexdump pcidump regexp setpci lsacpi chain 
test serial multiboot cbmemc linux16 gzio echo help' --fonts= --themes= 
--locales= -d grub-core/ /boot/grub/grub.cfg=$(srcdir)/coreboot.cfg
+       pkgdatadir=. ./grub-mkstandalone --grub-mkimage=./grub-mkimage -O 
i386-coreboot -o $@ --modules='ahci pata ehci uhci ohci usb_keyboard usbms 
part_msdos xfs ext2 fat at_keyboard part_gpt usbserial_usbdebug cbfs' 
--install-modules='ls linux search configfile normal cbtime cbls memrw iorw 
minicmd lsmmap lspci halt reboot hexdump pcidump regexp setpci lsacpi chain 
test serial multiboot cbmemc linux16 gzio echo help' --fonts= --themes= 
--locales= -d grub-core/ /boot/grub/grub.cfg=$(srcdir)/coreboot.cfg $(if 
$(FIXED_TIMESTAMP),-t $(FIXED_TIMESTAMP))
 endif
 
 endif
-- 
2.6.3