[build] Disable ccache for embedded.o

Embedded image support uses .incbin in inline assembly to include binary
files.  The file dependency is not spotted by ccache when deciding
whether or not to rebuild embedded.o.  This results in builds that
contain an outdated version of the embedded image when ccache is used.

Reported-by: Tim 'Shaggy' Bielawa <tbielawa@jabber.org>
Reported-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Marty Connor <mdc@etherboot.org>

.dotest/0001

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+From: Stefan Hajnoczi <stefanha@gmail.com>
+To: gpxe-devel@etherboot.org
+Date: Mon,  1 Mar 2010 20:34:47 +0000
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+Subject: [gPXE-devel] [PATCH] [makefile] Disable ccache for embedded.o
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+
+Embedded image support uses .incbin in inline assembly to include binary
+files.  The file dependency is not spotted by ccache when deciding
+whether or not to rebuild embedded.o.  This results in builds that
+contain an outdated version of the embedded image when ccache is used.
+
+Reported-by: Tim 'Shaggy' Bielawa <tbielawa@jabber.org>
+Reported-by: Matt Domsch <Matt_Domsch@dell.com>
+Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
+---
+ src/Makefile.housekeeping |    7 +++++++
+ 1 files changed, 7 insertions(+), 0 deletions(-)
+
+diff --git a/src/Makefile.housekeeping b/src/Makefile.housekeeping
+index 1f5e115..8ba7e44 100644
+--- a/src/Makefile.housekeeping
++++ b/src/Makefile.housekeeping
+@@ -511,6 +511,13 @@ EMBED_ALL	:= $(foreach i,$(call seq,1,$(words $(EMBEDDED_FILES))),\
+ 			     \"$(notdir $(word $(i),$(EMBEDDED_FILES)))\" ))
+ 
+ $(BIN)/embedded.o : $(EMBEDDED_FILES) $(EMBEDDED_LIST)
++
++# This file uses .incbin inline assembly to include a binary file.
++# Unfortunately ccache does not detect this dependency and caches builds even
++# when the binary file has changed.
++#
++$(BIN)/embedded.o : override CC := env CCACHE_DISABLE=1 $(CC)
++
+ CFLAGS_embedded = -DEMBED_ALL="$(EMBED_ALL)"
+ 
+ # Generate the NIC file from the parsed source files.  The NIC file is
+-- 
+1.6.6.1
+
+_______________________________________________
+gPXE-devel mailing list
+gPXE-devel@etherboot.org
+http://etherboot.org/mailman/listinfo/gpxe-devel

.dotest/binary

+

.dotest/final-commit

+[build] Disable ccache for embedded.o
+
+Embedded image support uses .incbin in inline assembly to include binary
+files.  The file dependency is not spotted by ccache when deciding
+whether or not to rebuild embedded.o.  This results in builds that
+contain an outdated version of the embedded image when ccache is used.
+
+Reported-by: Tim 'Shaggy' Bielawa <tbielawa@jabber.org>
+Reported-by: Matt Domsch <Matt_Domsch@dell.com>
+Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
+Signed-off-by: Marty Connor <mdc@etherboot.org>

.dotest/final-commit~

+Disable ccache for embedded.o
+
+Embedded image support uses .incbin in inline assembly to include binary
+files.  The file dependency is not spotted by ccache when deciding
+whether or not to rebuild embedded.o.  This results in builds that
+contain an outdated version of the embedded image when ccache is used.
+
+Reported-by: Tim 'Shaggy' Bielawa <tbielawa@jabber.org>
+Reported-by: Matt Domsch <Matt_Domsch@dell.com>
+Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
+Signed-off-by: Marty Connor <mdc@etherboot.org>

.dotest/info

+Author: Stefan Hajnoczi
+Email: stefanha@gmail.com
+Subject: Disable ccache for embedded.o
+Date: Mon, 1 Mar 2010 20:34:47 +0000
+

.dotest/keep

+

.dotest/last

+1

.dotest/msg

+Embedded image support uses .incbin in inline assembly to include binary
+files.  The file dependency is not spotted by ccache when deciding
+whether or not to rebuild embedded.o.  This results in builds that
+contain an outdated version of the embedded image when ccache is used.
+
+Reported-by: Tim 'Shaggy' Bielawa <tbielawa@jabber.org>
+Reported-by: Matt Domsch <Matt_Domsch@dell.com>
+Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>

.dotest/msg-clean

+Disable ccache for embedded.o
+
+Embedded image support uses .incbin in inline assembly to include binary
+files.  The file dependency is not spotted by ccache when deciding
+whether or not to rebuild embedded.o.  This results in builds that
+contain an outdated version of the embedded image when ccache is used.
+
+Reported-by: Tim 'Shaggy' Bielawa <tbielawa@jabber.org>
+Reported-by: Matt Domsch <Matt_Domsch@dell.com>
+Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>

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+1

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+t

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+