From: Raymund Will <rw@suse.com>
Subject: Make default '--loader' build-time configurable.

Each distribution uses a specific 'vendor'-directory in the
'efi' directory on the EFI System Partition to store their
EFI loader.  There's little use in hardcoding the value
for just one in 'efibootmgr', which is displayed in '--help'
and used as default without '--loader'.

Simply use
  make OS_VENDOR=<vendor> EFI_LOADER=<loader>.efi
to get the desired value.  :)

Signed-off-by: Raymund Will <rw@suse.com>
---
 Make.defaults    | 4 ++++
 src/efibootmgr.c | 9 +++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/Make.defaults b/Make.defaults
index 0ac50ef..7ca17e3 100644
--- a/Make.defaults
+++ b/Make.defaults
@@ -9,6 +9,9 @@ localedir ?= $(datadir)/locale/
 PCDIR	?= $(libdir)/pkgconfig
 DESTDIR	?=
 
+OS_VENDOR := redhat
+EFI_LOADER := grub.efi
+
 INSTALL ?= install
 CROSS_COMPILE	?=
 PKG_CONFIG = $(CROSS_COMPILE)pkg-config
@@ -29,6 +32,7 @@ cflags	= $(CFLAGS) $(SUBDIR_CFLAGS) \
 	-std=gnu11 -fPIC \
 	-D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -DLOCALEDIR=\"$(localedir)\" \
 	-DEFIBOOTMGR_VERSION="\"$(VERSION)\"" \
+	-DDEFAULT_LOADER=\"\\\\efi\\\\$(OS_VENDOR)\\\\$(EFI_LOADER)\" \
 	$(if $(findstring clang,$(CC)),$(clang_cflags),) \
 	$(if $(findstring gcc,$(CC)),$(gcc_cflags),) \
 	$(call pkg-config-cflags)
diff --git a/src/efibootmgr.c b/src/efibootmgr.c
index 20d71e2..825435e 100644
--- a/src/efibootmgr.c
+++ b/src/efibootmgr.c
@@ -1,5 +1,6 @@
 /*
-  efibootmgr.c - Manipulates EFI variables as exported in /proc/efi/vars
+  efibootmgr.c - Manipulates EFI variables as exported in /sys/firmware/efi/
+    efivars or vars (previously /proc/efi/vars)
 
   Copyright (C) 2001-2004 Dell, Inc. <Matt_Domsch@dell.com>
 
@@ -18,7 +19,7 @@
     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 
-  This must tie the EFI_DEVICE_PATH to /boot/efi/EFI/redhat/grub.efi
+  This must tie the EFI_DEVICE_PATH to /boot/efi/EFI/<vendor>/<loader>.efi
   The  EFI_DEVICE_PATH will look something like:
     ACPI device path, length 12 bytes
     Hardware Device Path, PCI, length 6 bytes
@@ -1233,7 +1234,7 @@ usage()
 	printf("\t     --ip-port <local>,<remote>	set local and remote IP ports\n");
 	printf("\t     --ip-origin { {dhcp|static} | { static|stateless|stateful} }\n");
 #endif
-	printf("\t-l | --loader name     (defaults to \\EFI\\redhat\\grub.efi)\n");
+	printf("\t-l | --loader name     (defaults to \""DEFAULT_LOADER"\")\n");
 	printf("\t-L | --label label     Boot manager display label (defaults to \"Linux\")\n");
 	printf("\t-m | --mirror-below-4G t|f mirror memory below 4GB\n");
 	printf("\t-M | --mirror-above-4G X percentage memory to mirror above 4GB\n");
@@ -1263,7 +1264,7 @@ set_default_opts()
 	opts.active          = -1;   /* Don't set it */
 	opts.timeout         = -1;   /* Don't set it */
 	opts.edd10_devicenum = 0x80;
-	opts.loader          = "\\EFI\\redhat\\grub.efi";
+	opts.loader          = DEFAULT_LOADER;
 	opts.label           = (unsigned char *)"Linux";
 	opts.disk            = "/dev/sda";
 	opts.part            = 1;
-- 
2.6.6