Adding libhomfly, a library to compute the homfly polynomial of a link.

To be used by SageMath.

math/Makefile

@@ -358,6 +358,7 @@
     SUBDIR += libbraiding
     SUBDIR += libccd
     SUBDIR += libflame
+    SUBDIR += libhomfly
     SUBDIR += liblbfgs
     SUBDIR += libmesh
     SUBDIR += libmissing

math/libhomfly/Makefile

@@ -0,0 +1,30 @@
+# Created by: thierry@pompo.net
+# $FreeBSD$
+
+PORTNAME=	libhomfly
+DISTVERSION=	1.02r6
+CATEGORIES=	math
+
+MAINTAINER=	thierry@FreeBSD.org
+COMMENT=	Library to compute the homfly polynomial of knots and link
+
+LICENSE=	PD
+
+LIB_DEPENDS=	libgc-threaded.so:devel/boehm-gc-threaded
+
+USE_GITHUB=	yes
+GH_ACCOUNT=	miguelmarco
+
+USES=		autoreconf libtool localbase
+
+GNU_CONFIGURE=	yes
+USE_LDCONFIG=	yes
+TEST_TARGET=	check
+
+PLIST_FILES=	include/homfly.h	\
+		lib/libhomfly.a		\
+		lib/libhomfly.so	\
+		lib/libhomfly.so.0	\
+		lib/libhomfly.so.0.0.0
+
+.include <bsd.port.mk>

math/libhomfly/distinfo

@@ -0,0 +1,3 @@
+TIMESTAMP = 1588250209
+SHA256 (miguelmarco-libhomfly-1.02r6_GH0.tar.gz) = cf5d5031c905318127c83fdffc891deb097c77ee48cdd0131f839ea6ecb64a84
+SIZE (miguelmarco-libhomfly-1.02r6_GH0.tar.gz) = 24498

math/libhomfly/files/patch-configure.ac

@@ -0,0 +1,8 @@
+--- configure.ac.orig	2018-11-08 13:08:16 UTC
++++ configure.ac
+@@ -1,4 +1,4 @@
+-AC_INIT([libhomfly], [1.02r5], [mmarco@unizar.es])
++AC_INIT([libhomfly], [1.02r6], [mmarco@unizar.es])
+ AC_CONFIG_AUX_DIR([build-aux])
+ AC_CONFIG_MACRO_DIR([m4])
+ AM_INIT_AUTOMAKE([foreign -Wall])

math/libhomfly/pkg-descr

@@ -0,0 +1,8 @@
+Library to compute the homfly polynomial of a link
+
+This is basically a conversion of the program written by Robert J Jenkins Jr
+into a shared library. It accepts as entry a character string, formatted in the
+same way as the input files that the original code used. The returned value is
+the string that the original program would print on screen.
+
+WWW: https://github.com/miguelmarco/libhomfly