[Buildroot] [PATCH] package/linuxptp: remove incdefs.sh to avoid cross-compilation issues

[Romain Naour]

incdefs.sh try to define some flags based on some build tests and
by checking a kernel header. It doesn't work well while cross-compiling.

The Buildroot buildsystem define these definition directly
in the EXTRA_CFLAGS.

Fixes:
http://autobuild.buildroot.net/results/364/36470db2c262d2e1fda5144a08cfe221831e093e

Signed-off-by: Romain Naour <romain.naour at smile.fr>
---
 ...move-incdefs.sh-to-avoid-cross-compilatio.patch | 31 ++++++++++++++++++++++
 package/linuxptp/Config.in                         |  4 +++
 package/linuxptp/linuxptp.mk                       | 10 +++++--
 3 files changed, 43 insertions(+), 2 deletions(-)
 create mode 100644 package/linuxptp/0001-makefile-remove-incdefs.sh-to-avoid-cross-compilatio.patch

diff --git a/package/linuxptp/0001-makefile-remove-incdefs.sh-to-avoid-cross-compilatio.patch b/package/linuxptp/0001-makefile-remove-incdefs.sh-to-avoid-cross-compilatio.patch
new file mode 100644
index 0000000..cc932b4
--- /dev/null
+++ b/package/linuxptp/0001-makefile-remove-incdefs.sh-to-avoid-cross-compilatio.patch
@@ -0,0 +1,31 @@
+From 0759b36ad0a728a49f329fa0e7e6173fe3ccb657 Mon Sep 17 00:00:00 2001
+From: Romain Naour <romain.naour at smile.fr>
+Date: Wed, 5 Jul 2017 15:37:22 +0200
+Subject: [PATCH] makefile: remove incdefs.sh to avoid cross-compilation issues
+
+The Buildroot buildsystem define these definition directly
+in the EXTRA_CFLAGS.
+
+Fixes:
+http://autobuild.buildroot.net/results/364/36470db2c262d2e1fda5144a08cfe221831e093e
+
+Signed-off-by: Romain Naour <romain.naour at smile.fr>
+---
+ makefile | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/makefile b/makefile
+index f898336..5912f9a 100644
+--- a/makefile
++++ b/makefile
+@@ -33,7 +33,6 @@ OBJECTS	= $(OBJ) hwstamp_ctl.o phc2sys.o phc_ctl.o pmc.o pmc_common.o \
+ SRC	= $(OBJECTS:.o=.c)
+ DEPEND	= $(OBJECTS:.o=.d)
+ srcdir	:= $(dir $(lastword $(MAKEFILE_LIST)))
+-incdefs := $(shell $(srcdir)/incdefs.sh)
+ version := $(shell $(srcdir)/version.sh $(srcdir))
+ VPATH	= $(srcdir)
+ 
+-- 
+2.9.4
+
diff --git a/package/linuxptp/Config.in b/package/linuxptp/Config.in
index 3e18a0c..8c9d684 100644
--- a/package/linuxptp/Config.in
+++ b/package/linuxptp/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_LINUXPTP
 	bool "linuxptp"
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
 	help
 	  The Linux PTP Project is the Precision Time Protocol
 	  implementation according to IEEE standard 1588 for Linux.
@@ -11,3 +12,6 @@ config BR2_PACKAGE_LINUXPTP
 	  not a goal.
 
 	  http://linuxptp.sourceforge.net/
+
+comment "linuxptp needs a toolchain w/ headers >= 3.2"
+	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
diff --git a/package/linuxptp/linuxptp.mk b/package/linuxptp/linuxptp.mk
index beb2591..35702e0 100644
--- a/package/linuxptp/linuxptp.mk
+++ b/package/linuxptp/linuxptp.mk
@@ -10,10 +10,16 @@ LINUXPTP_SITE = git://git.code.sf.net/p/linuxptp/code
 LINUXPTP_LICENSE = GPL-2.0+
 LINUXPTP_LICENSE_FILES = COPYING
 
+# incdefs.sh doesn't work for cross-compilation.
+# Define HAVE_ONESTEP_SYNC in EXTRA_CFLAGS directly and depends on
+# kernel headers >= 3.2.
 define LINUXPTP_BUILD_CMDS
 	$(TARGET_MAKE_ENV) CROSS_COMPILE="$(TARGET_CROSS)" \
-		$(MAKE) KBUILD_OUTPUT=$(TARGET_DIR) \
-		EXTRA_CFLAGS="$(TARGET_CFLAGS)" EXTRA_LDFLAGS="$(TARGET_LDFLAGS)" \
+		$(MAKE) \
+		EXTRA_CFLAGS="$(TARGET_CFLAGS) -D_GNU_SOURCE \
+			-DHAVE_ONESTEP_SYNC -DHAVE_CLOCK_ADJTIME \
+			-DHAVE_POSIX_SPAWN" \
+		EXTRA_LDFLAGS="$(TARGET_LDFLAGS)" \
 		-C $(@D) all
 endef
 
-- 
2.9.4