[PATCH] Remove CPPFLAGS_XEN

[Olaf Hering]

A grub for xen can be built with CPPFLAGS="-I/path" ./configure, which
has the benefit that CPPFLAGS gets automatically included in the
Makefiles.  There is no need for a private makefile variable, the xen
headers are equal to headers for other optional components.

For some commands the cppflags have to point to POSIX, otherwise
stdint.h will not be found. Previously it was loaded unconditionally
from /usr/include.

Signed-off-by: Olaf Hering <address@hidden>
---
 conf/Makefile.common        |  3 ---
 grub-core/Makefile.core.def | 15 ++++++---------
 2 files changed, 6 insertions(+), 12 deletions(-)

diff --git a/conf/Makefile.common b/conf/Makefile.common
index 96e58c9..1990005 100644
--- a/conf/Makefile.common
+++ b/conf/Makefile.common
@@ -18,9 +18,6 @@ if COND_arm64
   CFLAGS_PLATFORM += -mcmodel=large
 endif
 
-#FIXME: discover and check XEN headers
-CPPFLAGS_XEN = -I/usr/include
-
 # Other options
 
 CPPFLAGS_DEFAULT = -DGRUB_FILE=\"$(subst $(srcdir)/,,$<)\"
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index a6101de..10754e7 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -59,9 +59,6 @@ kernel = {
   ia64_efi_ldflags = '-Wl,-r,-d';
   ia64_efi_stripflags = '--strip-unneeded -K start -R .note -R .comment -R 
.note.gnu.gold-version';
 
-  x86_64_xen_cppflags     = '$(CPPFLAGS_XEN)';
-  i386_xen_cppflags       = '$(CPPFLAGS_XEN)';
-
   arm_efi_ldflags          = '-Wl,-r,-d';
   arm_efi_stripflags       = '--strip-unneeded -K start -R .note -R .comment 
-R .note.gnu.gold-version';
 
@@ -604,7 +601,7 @@ module = {
 module = {
   name = lsxen;
   common = commands/xen/lsxen.c;
-  cppflags = '$(CPPFLAGS_XEN)';
+  cppflags = '$(CPPFLAGS_POSIX)';
 
   enable = xen;
 };
@@ -825,7 +822,7 @@ module = {
   i386_coreboot = lib/i386/halt.c;
   i386_qemu = lib/i386/halt.c;
   xen = lib/xen/halt.c;
-  xen_cppflags = '$(CPPFLAGS_XEN)';
+  xen_cppflags = '$(CPPFLAGS_POSIX)';
   efi = lib/efi/halt.c;
   ieee1275 = lib/ieee1275/halt.c;
   emu = lib/emu/halt.c;
@@ -846,7 +843,7 @@ module = {
   mips_loongson = lib/mips/loongson/reboot.c;
   mips_qemu_mips = lib/mips/qemu_mips/reboot.c;
   xen = lib/xen/reboot.c;
-  xen_cppflags = '$(CPPFLAGS_XEN)';
+  xen_cppflags = '$(CPPFLAGS_POSIX)';
   uboot = lib/uboot/reboot.c;
   common = commands/reboot.c;
 };
@@ -1527,7 +1524,7 @@ module = {
   i386_xen = lib/i386/xen/relocator.S;
   x86_64_xen = lib/x86_64/xen/relocator.S;
   xen = lib/i386/relocator_common_c.c;
-  xen_cppflags = '$(CPPFLAGS_XEN)';
+  xen_cppflags = '$(CPPFLAGS_POSIX)';
 
   extra_dist = lib/i386/relocator_common.S;
   extra_dist = kern/powerpc/cache_flush.S;
@@ -1548,7 +1545,7 @@ module = {
   sparc64_ieee1275 = lib/ieee1275/cmos.c;
   powerpc_ieee1275 = lib/ieee1275/cmos.c;
   xen = lib/xen/datetime.c;
-  xen_cppflags = '$(CPPFLAGS_XEN)';
+  xen_cppflags = '$(CPPFLAGS_POSIX)';
 
   mips_arc = lib/arc/datetime.c;
   enable = noemu;
@@ -1651,7 +1648,7 @@ module = {
   name = linux;
   x86 = loader/i386/linux.c;
   xen = loader/i386/xen.c;
-  xen_cppflags    = '$(CPPFLAGS_XEN)';
+  xen_cppflags = '$(CPPFLAGS_POSIX)';
   i386_pc = lib/i386/pc/vesa_modes_table.c;
   mips = loader/mips/linux.c;
   powerpc_ieee1275 = loader/powerpc/ieee1275/linux.c;