Reduce build times

U-Boot Makefiles contain a number of tests for compiler features etc.
which so far are executed again and again.  On some architectures
(especially ARM) this results in a large number of calls to gcc.

This patch makes sure to run such tests only once, thus largely
reducing the number of "execve" system calls.

Example: number of "execve" system calls for building the "P2020DS"
(Power Architecture) and "qong" (ARM) boards, measured as:
	-> strace -f -e trace=execve -o /tmp/foo ./MAKEALL <board>
	-> grep execve /tmp/foo | wc -l

	Before: After:	Reduction:
==================================
P2020DS 20555	15205	-26%
qong	31692	14490	-54%

As a result, built times are significantly reduced, typically by
30...50%.

Signed-off-by: Wolfgang Denk <[email protected]>
Cc: Andy Fleming <[email protected]>
Cc: Kumar Gala <[email protected]>
Cc: Albert Aribaud <[email protected]>
cc: Graeme Russ <[email protected]>
cc: Mike Frysinger <[email protected]>
Tested-by: Graeme Russ <[email protected]>
Tested-by: Matthias Weisser <[email protected]>
Tested-by: Sanjeev Premi <[email protected]>
Tested-by: Simon Glass <[email protected]>
Tested-by: Macpaul Lin <[email protected]>
Acked-by: Mike Frysinger <[email protected]>

17 files changed, 38 insertions, 19 deletions

diff --git a/arch/arm/cpu/arm1136/config.mk b/arch/arm/cpu/arm1136/config.mk
index 3e685354ab7..efee0d1dca6 100644
--- a/arch/arm/cpu/arm1136/config.mk
+++ b/arch/arm/cpu/arm1136/config.mk
@@ -29,4 +29,5 @@ PLATFORM_CPPFLAGS += -march=armv5
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/arm1176/config.mk b/arch/arm/cpu/arm1176/config.mk
index 14346cfff3f..222d352b3a8 100644
--- a/arch/arm/cpu/arm1176/config.mk
+++ b/arch/arm/cpu/arm1176/config.mk
@@ -29,4 +29,6 @@ PLATFORM_CPPFLAGS += -march=armv5t
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,\
+			$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/arm1176/s3c64xx/config.mk b/arch/arm/cpu/arm1176/s3c64xx/config.mk
index 14346cfff3f..222d352b3a8 100644
--- a/arch/arm/cpu/arm1176/s3c64xx/config.mk
+++ b/arch/arm/cpu/arm1176/s3c64xx/config.mk
@@ -29,4 +29,6 @@ PLATFORM_CPPFLAGS += -march=armv5t
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,\
+			$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/arm720t/config.mk b/arch/arm/cpu/arm720t/config.mk
index 3844c626af3..210c6dcb08a 100644
--- a/arch/arm/cpu/arm720t/config.mk
+++ b/arch/arm/cpu/arm720t/config.mk
@@ -30,4 +30,6 @@ PLATFORM_CPPFLAGS += -march=armv4 -mtune=arm7tdmi
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,\
+			$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/arm920t/config.mk b/arch/arm/cpu/arm920t/config.mk
index 8f6c1a354c5..f03030a2fa5 100644
--- a/arch/arm/cpu/arm920t/config.mk
+++ b/arch/arm/cpu/arm920t/config.mk
@@ -29,4 +29,5 @@ PLATFORM_CPPFLAGS += -march=armv4
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/arm925t/config.mk b/arch/arm/cpu/arm925t/config.mk
index 8f6c1a354c5..f03030a2fa5 100644
--- a/arch/arm/cpu/arm925t/config.mk
+++ b/arch/arm/cpu/arm925t/config.mk
@@ -29,4 +29,5 @@ PLATFORM_CPPFLAGS += -march=armv4
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/arm926ejs/at91/config.mk b/arch/arm/cpu/arm926ejs/at91/config.mk
index 19296fdba2a..370630d4de0 100644
--- a/arch/arm/cpu/arm926ejs/at91/config.mk
+++ b/arch/arm/cpu/arm926ejs/at91/config.mk
@@ -1 +1,2 @@
-PLATFORM_CPPFLAGS += $(call cc-option,-mtune=arm926ejs,)
+PF_CPPFLAGS_TUNE := $(call cc-option,-mtune=arm926ejs,)
+PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_TUNE)
diff --git a/arch/arm/cpu/arm926ejs/config.mk b/arch/arm/cpu/arm926ejs/config.mk
index f8ef90f2d51..ffb2e6c3ea7 100644
--- a/arch/arm/cpu/arm926ejs/config.mk
+++ b/arch/arm/cpu/arm926ejs/config.mk
@@ -29,4 +29,5 @@ PLATFORM_CPPFLAGS += -march=armv5te
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/arm946es/config.mk b/arch/arm/cpu/arm946es/config.mk
index e783f697a10..c2354ba4e9e 100644
--- a/arch/arm/cpu/arm946es/config.mk
+++ b/arch/arm/cpu/arm946es/config.mk
@@ -29,4 +29,5 @@ PLATFORM_CPPFLAGS +=  -march=armv4
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/arm_intcm/config.mk b/arch/arm/cpu/arm_intcm/config.mk
index e783f697a10..c2354ba4e9e 100644
--- a/arch/arm/cpu/arm_intcm/config.mk
+++ b/arch/arm/cpu/arm_intcm/config.mk
@@ -29,4 +29,5 @@ PLATFORM_CPPFLAGS +=  -march=armv4
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/armv7/config.mk b/arch/arm/cpu/armv7/config.mk
index 49ac9c74aeb..83ddf10f1f6 100644
--- a/arch/arm/cpu/armv7/config.mk
+++ b/arch/arm/cpu/armv7/config.mk
@@ -29,5 +29,5 @@ PLATFORM_CPPFLAGS += -march=armv5
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,\
-		    $(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/armv7/omap-common/config.mk b/arch/arm/cpu/armv7/omap-common/config.mk
index 49ac9c74aeb..c400dccba8a 100644
--- a/arch/arm/cpu/armv7/omap-common/config.mk
+++ b/arch/arm/cpu/armv7/omap-common/config.mk
@@ -29,5 +29,6 @@ PLATFORM_CPPFLAGS += -march=armv5
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,\
-		    $(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,\
+			$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/ixp/config.mk b/arch/arm/cpu/ixp/config.mk
index 5868cba38b7..91496659990 100644
--- a/arch/arm/cpu/ixp/config.mk
+++ b/arch/arm/cpu/ixp/config.mk
@@ -37,4 +37,5 @@ LDFLAGS_u-boot += --gc-sections
 # Supply options according to compiler version
 #
 # =========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/lh7a40x/config.mk b/arch/arm/cpu/lh7a40x/config.mk
index 47b2b7b722d..1c4aa97eaa6 100644
--- a/arch/arm/cpu/lh7a40x/config.mk
+++ b/arch/arm/cpu/lh7a40x/config.mk
@@ -29,4 +29,5 @@ PLATFORM_CPPFLAGS += -march=armv4
 # Supply options according to compiler version
 #
 # ========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/pxa/config.mk b/arch/arm/cpu/pxa/config.mk
index a05d69ca270..0bbe295a2c0 100644
--- a/arch/arm/cpu/pxa/config.mk
+++ b/arch/arm/cpu/pxa/config.mk
@@ -30,4 +30,5 @@ PLATFORM_CPPFLAGS += -march=armv5te -mtune=xscale
 # Supply options according to compiler version
 #
 # ========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/s3c44b0/config.mk b/arch/arm/cpu/s3c44b0/config.mk
index 7454d728a55..f6f6398e6e5 100644
--- a/arch/arm/cpu/s3c44b0/config.mk
+++ b/arch/arm/cpu/s3c44b0/config.mk
@@ -30,4 +30,5 @@ PLATFORM_CPPFLAGS += -march=armv4 -mtune=arm7tdmi -msoft-float
 # Supply options according to compiler version
 #
 # ========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
diff --git a/arch/arm/cpu/sa1100/config.mk b/arch/arm/cpu/sa1100/config.mk
index 6f21f410be3..06af16088df 100644
--- a/arch/arm/cpu/sa1100/config.mk
+++ b/arch/arm/cpu/sa1100/config.mk
@@ -30,4 +30,5 @@ PLATFORM_CPPFLAGS += -march=armv4 -mtune=strongarm1100
 # Supply options according to compiler version
 #
 # ========================================================================
-PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
+PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)