package/rtklib: new package

RTKLIB is an open source program package for standard and precise
positioning with GNSS.

Version used here is from rtkexplorer, which is better optimized
and more frequently updated than original version by Tomoji Takasu.

Signed-off-by: Jan Havran <havran.jan@email.cz>

---

v1: WIP: For SkiffOS:

- https://patchwork.ozlabs.org/project/buildroot/patch/YhJLS73VW3szIXR+@arch-zen.localdomain/
- Changes applied from Thomas's review.
- There are still Changes Requested before submitting upstream.
- Updated to latest revision of the pkg.
- Skip building the fortran files, need to investigate when this is necessary.

Tested-by: Christian Stewart <christian@aperture.us>

DEVELOPERS

@@ -1482,6 +1482,7 @@ F:	package/microchip-hss-payload-generator/
 N:	Jan Havran <havran.jan@email.cz>
 F:	board/pine64/pinecube/
 F:	configs/pine64_pinecube_defconfig
+F:	package/rtklib/
 
 N:	Jan Heylen <jan.heylen@nokia.com>
 F:	package/opentracing-cpp/

package/Config.in

@@ -602,6 +602,7 @@ endmenu
 	source "package/rpi-userland/Config.in"
 	source "package/rs485conf/Config.in"
 	source "package/rtc-tools/Config.in"
+	source "package/rtklib/Config.in"
 	source "package/rtl8188eu/Config.in"
 	source "package/rtl8189es/Config.in"
 	source "package/rtl8189fs/Config.in"

package/rtklib/Config.in

@@ -0,0 +1,38 @@
+comment "rtklib needs a toolchain w/ threads"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS
+
+config BR2_PACKAGE_RTKLIB
+	bool "rtklib"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	help
+	  RTKLIB is an open source program package for standard and
+	  precise positioning with GNSS (global navigation satellite
+	  system).
+
+	  This is a version of RTKLIB optimized for single and dual
+	  frequency low cost GPS receivers, especially u-blox receivers.
+
+	  https://rtkexplorer.com/
+
+if BR2_PACKAGE_RTKLIB
+
+config BR2_PACKAGE_RTKLIB_CONVBIN
+	bool "convbin"
+
+config BR2_PACKAGE_RTKLIB_POS2KML
+	bool "pos2kml"
+
+comment "rnx2rtkp needs Fortran"
+	depends on !BR2_TOOLCHAIN_HAS_FORTRAN
+
+config BR2_PACKAGE_RTKLIB_RNX2RTKP
+	bool "rnx2rtkp"
+	depends on BR2_TOOLCHAIN_HAS_FORTRAN
+
+config BR2_PACKAGE_RTKLIB_RTKRCV
+	bool "rtkrcv"
+
+config BR2_PACKAGE_RTKLIB_STR2STR
+	bool "str2str"
+
+endif

package/rtklib/rtklib.hash

@@ -0,0 +1,3 @@
+# Locally computed
+sha256  f10efd2cc9e22d9e4a0c950ab86660747241d8b8a34d657952b5d2b9d14cb81b  rtklib-620fa2873ce9182ab3ceab223170a3a2b7c3d651.tar.gz
+sha256  219747832d49ee958457b2934080ab8d94bd9d8e45fcb1c36f89776fd2c5ed8a  license.txt

package/rtklib/rtklib.mk

@@ -0,0 +1,38 @@
+################################################################################
+#
+# rtklib
+#
+################################################################################
+
+RTKLIB_VERSION = 620fa2873ce9182ab3ceab223170a3a2b7c3d651
+RTKLIB_SITE = $(call github,rtklibexplorer,RTKLIB,$(RTKLIB_VERSION))
+RTKLIB_LICENSE = BSD-2-Clause
+RTKLIB_LICENSE_FILES = license.txt
+
+RTKLIB_APPS = \
+	$(if $(BR2_PACKAGE_RTKLIB_CONVBIN),convbin) \
+	$(if $(BR2_PACKAGE_RTKLIB_POS2KML),pos2kml) \
+	$(if $(BR2_PACKAGE_RTKLIB_RNX2RTKP),rnx2rtkp) \
+	$(if $(BR2_PACKAGE_RTKLIB_RTKRCV),rtkrcv) \
+	$(if $(BR2_PACKAGE_RTKLIB_STR2STR),str2str)
+
+define RTKLIB_BUILD_CMDS
+	find $(@D) -name '*.a' | xargs rm -f
+	# TODO: Requires fortran compiler. Build conditional on RNX2RTKP.
+	# $(TARGET_MAKE_ENV) $(MAKE) -C $(@D)/lib/iers/gcc \
+	#  	CC="$(TARGET_CC)" \
+	#  	F77="$(TARGET_FC)"
+	$(foreach app,$(RTKLIB_APPS),\
+		$(TARGET_MAKE_ENV) $(MAKE) -C $(@D)/app/consapp/$(app)/gcc \
+			CC="$(TARGET_CC)"
+	)
+endef
+
+define RTKLIB_INSTALL_TARGET_CMDS
+	$(foreach app,$(RTKLIB_APPS), \
+		$(INSTALL) -m 0755 $(@D)/app/consapp/$(app)/gcc/$(app) \
+			$(TARGET_DIR)/usr/bin/$(app)
+	)
+endef
+
+$(eval $(generic-package))