[PATCH] purgatory: compile sha256.c only on ia64 with -O0

[Richard Weinberger]

If we have to compile sha256.c on ia64 with -O0 to produce sane code
do it only on ia64.

This change makes executing a new kernel on my AMD geode CPU much faster.
Without the patch "kexec -e" takes 27 seconds, with only 16.

Signed-off-by: Richard Weinberger <richard at nod.at>
---
 purgatory/Makefile           | 15 +--------------
 purgatory/arch/ia64/Makefile |  3 +++
 2 files changed, 4 insertions(+), 14 deletions(-)

diff --git a/purgatory/Makefile b/purgatory/Makefile
index e39adec..6be8362 100644
--- a/purgatory/Makefile
+++ b/purgatory/Makefile
@@ -16,16 +16,7 @@ PURGATORY_SRCS += purgatory/string.c
 dist += purgatory/Makefile $(PURGATORY_SRCS)				\
 	purgatory/include/purgatory.h purgatory/include/string.h
 
-include $(srcdir)/purgatory/arch/alpha/Makefile
-include $(srcdir)/purgatory/arch/arm/Makefile
-include $(srcdir)/purgatory/arch/i386/Makefile
-include $(srcdir)/purgatory/arch/ia64/Makefile
-include $(srcdir)/purgatory/arch/mips/Makefile
-include $(srcdir)/purgatory/arch/ppc/Makefile
-include $(srcdir)/purgatory/arch/ppc64/Makefile
-include $(srcdir)/purgatory/arch/s390/Makefile
-include $(srcdir)/purgatory/arch/sh/Makefile
-include $(srcdir)/purgatory/arch/x86_64/Makefile
+include $(srcdir)/purgatory/arch/$(ARCH)/Makefile
 
 PURGATORY_SRCS+=$($(ARCH)_PURGATORY_SRCS)
 
@@ -36,10 +27,6 @@ clean += $(PURGATORY_OBJS) $(PURGATORY_DEPS) $(PURGATORY)
 
 -include $(PURGATORY_DEPS)
 
-# sha256.c needs to be compiled without optimization, else
-# purgatory fails to execute on ia64.
-purgatory/sha256.o: CFLAGS += -O0
-
 purgatory/sha256.o: $(srcdir)/util_lib/sha256.c
 	mkdir -p $(@D)
 	$(COMPILE.c) -o $@ $^
diff --git a/purgatory/arch/ia64/Makefile b/purgatory/arch/ia64/Makefile
index 32c3d97..a8a5c62 100644
--- a/purgatory/arch/ia64/Makefile
+++ b/purgatory/arch/ia64/Makefile
@@ -11,3 +11,6 @@ ia64_PURGATORY_EXTRA_CFLAGS = -ffixed-r28
 dist += purgatory/arch/ia64/Makefile $(ia64_PURGATORY_SRCS)	\
 	purgatory/arch/ia64/io.h purgatory/arch/ia64/purgatory-ia64.h
 
+# sha256.c needs to be compiled without optimization, else
+# purgatory fails to execute on ia64.
+purgatory/sha256.o: ia64_PURGATORY_EXTRA_CFLAGS += -O0
-- 
1.8.1.4