[meta-systemd][PATCH V2 4/7] systemd: Use cross cpp

[Khem Raj <raj.khem@gmail.com>]

While building for non x86 arch (ppc) found that build
was using host's cpp which was not generating exact
syscall list for ppc since it was using the include files
from host

With this patch will use $(CPP) instead of hardcoding
cpp in makefile.am and then set CPP properly in recipe

Fixes build failures on cross builds

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 .../systemd/systemd/use-cross-cpp.patch            |   30 ++++++++++++++++++++
 meta-systemd/recipes-core/systemd/systemd_187.bb   |    5 +++
 2 files changed, 35 insertions(+), 0 deletions(-)
 create mode 100644 meta-systemd/recipes-core/systemd/systemd/use-cross-cpp.patch

diff --git a/meta-systemd/recipes-core/systemd/systemd/use-cross-cpp.patch b/meta-systemd/recipes-core/systemd/systemd/use-cross-cpp.patch
new file mode 100644
index 0000000..8a4371e
--- /dev/null
+++ b/meta-systemd/recipes-core/systemd/systemd/use-cross-cpp.patch
@@ -0,0 +1,30 @@
+hardcoding cpp does not work when cross compiling systemd.
+since it will use the include headers from host system and
+syscalls are different for different architectures.
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Upstream-Status: Pending
+
+Index: systemd-187/Makefile.am
+===================================================================
+--- systemd-187.orig/Makefile.am	2012-07-29 16:39:57.628405921 -0700
++++ systemd-187/Makefile.am	2012-07-29 16:40:37.248405921 -0700
+@@ -1026,7 +1026,7 @@
+ 	src/core/syscall-to-name.h
+ 
+ src/core/syscall-list.txt: Makefile
+-	$(AM_V_GEN)cpp $(AM_CPPFLAGS) $(CPPFLAGS) -dM -include sys/syscall.h < /dev/null | $(AWK) '/^#define[ \t]+__NR_[^ ]+[ \t]+[0-9]/ { sub(/__NR_/, "", $$2); print $$2; }' > $@
++	$(AM_V_GEN)$(CPP) $(AM_CPPFLAGS) $(CPPFLAGS) -dM -include sys/syscall.h < /dev/null | $(AWK) '/^#define[ \t]+__NR_[^ ]+[ \t]+[0-9]/ { sub(/__NR_/, "", $$2); print $$2; }' > $@
+ 
+ src/core/syscall-from-name.gperf: src/core/syscall-list.txt Makefile
+ 	$(AM_V_GEN)$(AWK) 'BEGIN{ print "struct syscall_name { const char* name; int id; };"; print "%null-strings"; print "%%";} { printf "%s, __NR_%s\n", $$1, $$1 }' < $< > $@
+@@ -2199,7 +2199,7 @@
+ 
+ src/udev/keymap/keys.txt: Makefile
+ 	$(AM_V_at)mkdir -p src/udev/keymap
+-	$(AM_V_GEN)cpp $(AM_CPPFLAGS) $(CPPFLAGS) -dM -include linux/input.h < /dev/null | $(AWK) '/^#define[ \t]+KEY_[^ ]+[ \t]+[0-9]/ { if ($$2 != "KEY_MAX") { print $$2 } }' | sed 's/^KEY_COFFEE$$/KEY_SCREENLOCK/' > $@
++	$(AM_V_GEN)$(CPP) $(AM_CPPFLAGS) $(CPPFLAGS) -dM -include linux/input.h < /dev/null | $(AWK) '/^#define[ \t]+KEY_[^ ]+[ \t]+[0-9]/ { if ($$2 != "KEY_MAX") { print $$2 } }' | sed 's/^KEY_COFFEE$$/KEY_SCREENLOCK/' > $@
+ 
+ src/udev/keymap/keys-from-name.gperf: src/udev/keymap/keys.txt Makefile
+ 	$(AM_V_GEN)$(AWK) 'BEGIN{ print "struct key { const char* name; unsigned short id; };"; print "%null-strings"; print "%%";} { print $$1 ", " $$1 }' < $< > $@
diff --git a/meta-systemd/recipes-core/systemd/systemd_187.bb b/meta-systemd/recipes-core/systemd/systemd_187.bb
index a6f6281..a52e5a8 100644
--- a/meta-systemd/recipes-core/systemd/systemd_187.bb
+++ b/meta-systemd/recipes-core/systemd/systemd_187.bb
@@ -15,10 +15,14 @@ SERIAL_CONSOLE ?= "115200 /dev/ttyS0"
 
 SECTION = "base/shell"
 
+PR = "r1"
+
+
 inherit useradd pkgconfig autotools perlnative
 
 SRC_URI = "http://www.freedesktop.org/software/systemd/${P}.tar.xz \
            file://use-rootlibdir.patch \
+           file://use-cross-cpp.patch \
            file://gtk-doc.make \
            file://touchscreen.rules \
            file://modprobe.rules \
@@ -55,6 +59,7 @@ EXTRA_OECONF = " --with-distro=${SYSTEMDDISTRO} \
 
 # There's no docbook-xsl-native, so for the xsltproc check to false
 do_configure_prepend() {
+	export CPP="${HOST_PREFIX}cpp ${TOOLCHAIN_OPTIONS} ${HOST_CC_ARCH}"
 	sed -i /xsltproc/d configure.ac
 
 	cp ${WORKDIR}/gtk-doc.make ${S}/docs/
-- 
1.7.5.4