Subject: [PATCH 3/3] Makefile: use FIXED_TIMESTAMP for mkstandalone if set
From: Alexander Couzens <[email-masked]>
To: [email-masked]
Cc: Alexander Couzens <[email-masked]>
Date: Fri, 4 Dec 2015 17:10:44 +0100
List-Id: The development of GNU GRUB <grub-devel.gnu.org>

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

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