libtommath: new package

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/Config.in

@@ -1244,6 +1244,7 @@ menu "Other"
 	source "package/libsigc/Config.in"
 	source "package/libsigsegv/Config.in"
 	source "package/libtasn1/Config.in"
+	source "package/libtommath/Config.in"
 	source "package/libtpl/Config.in"
 	source "package/libubox/Config.in"
 	source "package/libuci/Config.in"

package/libtommath/Config.in

@@ -0,0 +1,7 @@
+config BR2_PACKAGE_LIBTOMMATH
+	bool "libtommath"
+	help
+	  LibTomMath is a free open source portable number theoretic
+	  multiple-precision integer library written entirely in C.
+
+	  http://www.libtom.net

package/libtommath/libtommath.hash

@@ -0,0 +1,2 @@
+# Locally computed
+sha256  993a7df9ee091fca430cdde3263df57d88ef62af8103903214da49fc51bbb56c  ltm-1.0.tar.xz

package/libtommath/libtommath.mk

@@ -0,0 +1,23 @@
+################################################################################
+#
+# libtommath
+#
+################################################################################
+
+LIBTOMMATH_VERSION = 1.0
+LIBTOMMATH_SITE = https://github.com/libtom/libtommath/releases/download/v$(LIBTOMMATH_VERSION)
+LIBTOMMATH_SOURCE = ltm-$(LIBTOMMATH_VERSION).tar.xz
+LIBTOMMATH_LICENSE = WTFPL
+LIBTOMMATH_LICENSE_FILES = LICENSE
+LIBTOMMATH_INSTALL_STAGING = YES
+LIBTOMMATH_INSTALL_TARGET = NO  # only static library
+
+define LIBTOMMATH_BUILD_CMDS
+	$(MAKE) -C $(@D) $(TARGET_CONFIGURE_OPTS) CFLAGS="-I./ $(TARGET_CFLAGS)"
+endef
+
+define LIBTOMMATH_INSTALL_STAGING_CMDS
+	$(MAKE) -C $(@D) DESTDIR="$(STAGING_DIR)" install
+endef
+
+$(eval $(generic-package))