Index: math/frobby/Makefile
===================================================================
--- math/frobby/Makefile
+++ math/frobby/Makefile
@@ -1,9 +1,10 @@
-PORTNAME=		frobby
-PORTVERSION=		0.9.5
+PORTNAME=	frobby
+PORTVERSION=	0.9.5
 DISTVERSIONPREFIX=	v
-CATEGORIES=		math
+PORTREVISION=	1
+CATEGORIES=	math
 
-MAINTAINER=	ports@FreeBSD.org
+MAINTAINER=	salvadore@FreeBSD.org
 COMMENT=	Software system and project for computations with monomial ideals
 
 LICENSE=	GPLv2+
@@ -15,42 +16,51 @@
 USE_GITHUB=	yes
 GH_ACCOUNT=	Macaulay2
 
-BINARY_ALIAS=	make=gmake
 USE_LDCONFIG=	yes
 
-SHEBANG_FILES=	test/testScripts/* test/runTests test/runSplitTests \
-		test/latticeFormats/runtest*
+SHEBANG_FILES=	test/latticeFormats/runtest* test/runSplitTests test/runTests \
+		test/testScripts/*
+
+MAKE_ARGS+=	GMP_INC_DIR=${LOCALBASE}/include
+MAKE_ENV=	RANLIB=${RANLIB}
+
+LDFLAGS+=	-L${LOCALBASE}/lib
+
+BINARY_ALIAS=	make=gmake
 
 OPTIONS_DEFINE=		EXEDOCS LIBDOCS TEST
-OPTIONS_DEFAULT=	STATIC SHARED
+OPTIONS_DEFAULT=	SHARED STATIC
 OPTIONS_MULTI=		INSTALL
-OPTIONS_MULTI_INSTALL=	EXECUTABLE \
-			SHARED \
-			STATIC
+OPTIONS_MULTI_INSTALL=	EXECUTABLE SHARED STATIC
+OPTIONS_SUB=		yes
+EXECUTABLE_DESC=	Build and install frobby executable
 EXEDOCS_DESC=		Build and install documentation for frobby executable
 LIBDOCS_DESC=		Build and install documentation for frobby library
-EXECUTABLE_DESC=	Build and install frobby executable
 SHARED_DESC=		Build and install libfrobby.so
 STATIC_DESC=		Build and install libfrobby.a
-EXEDOCS_BUILD_DEPENDS=	latex:print/tex-formats \
-			dvips:print/tex-dvipsk
+EXEDOCS_BUILD_DEPENDS=	dvips:print/tex-dvipsk \
+			latex:print/tex-formats
 LIBDOCS_BUILD_DEPENDS=	doxygen:devel/doxygen \
 			epstopdf:print/texlive-base
 TEST_BUILD_DEPENDS=	bash:shells/bash
-OPTIONS_SUB=		yes
-
-MAKE_ARGS+=	GMP_INC_DIR=${LOCALBASE}/include
-MAKE_ENV=	RANLIB=${RANLIB}
-LDFLAGS+=	-L${LOCALBASE}/lib
 
 .include <bsd.port.options.mk>
 
 .if ${PORT_OPTIONS:MSHARED} || ${PORT_OPTIONS:MSTATIC}
-PLIST_SUB+=	LIBRARY="" NO_LIBRARY="@comment "
+PLIST_SUB+=	LIBRARY="" \
+		NO_LIBRARY="@comment "
 .else
-PLIST_SUB+=	LIBRARY="@comment " NO_LIBRARY=""
+PLIST_SUB+=	LIBRARY="@comment " \
+		NO_LIBRARY=""
 .endif
 
+# The following variables should be defined to the same values
+# that can ben found in ${WRKSRC}/Makefile
+FROBBY_SOVERSION=	1
+FROBBY_AGE=		0
+FROBBY_REVISION=	0
+FROBBY_VERSION=		${FROBBY_SOVERSION}.${FROBBY_AGE}.${FROBBY_REVISION}
+
 do-build:
 
 do-build-EXEDOCS-on:
@@ -79,13 +89,14 @@
 
 do-install-SHARED-on:
 	${INSTALL_DATA} ${WRKSRC}/src/frobby.h ${STAGEDIR}${PREFIX}/include
-	${INSTALL_DATA} ${WRKSRC}/bin/libfrobby.so ${STAGEDIR}${PREFIX}/lib/libfrobby.so.0
-	cd ${STAGEDIR}${PREFIX}/lib &&	\
-	${LN} -sf libfrobby.so.0 ${STAGEDIR}${PREFIX}/lib/libfrobby.so
+	${INSTALL_LIB} ${WRKSRC}/bin/libfrobby.so.${FROBBY_VERSION} ${STAGEDIR}${PREFIX}/lib/libfrobby.so.${FROBBY_VERSION}
+	cd ${STAGEDIR}${PREFIX}/lib && \
+		${LN} -sf libfrobby.so.${FROBBY_VERSION} ${STAGEDIR}${PREFIX}/lib/libfrobby.so && \
+		${LN} -sf libfrobby.so.${FROBBY_VERSION} ${STAGEDIR}${PREFIX}/lib/libfrobby.so.${FROBBY_SOVERSION}
 
 do-install-STATIC-on:
 	${INSTALL_DATA} ${WRKSRC}/src/frobby.h ${STAGEDIR}${PREFIX}/include
-	${INSTALL_LIB} ${WRKSRC}/bin/libfrobby.a ${STAGEDIR}${PREFIX}/lib
+	${INSTALL_DATA} ${WRKSRC}/bin/libfrobby.a ${STAGEDIR}${PREFIX}/lib
 
 do-install-EXEDOCS-on:
 	${MKDIR} ${STAGEDIR}${DOCSDIR}
Index: math/frobby/files/patch-Makefile
===================================================================
--- math/frobby/files/patch-Makefile
+++ math/frobby/files/patch-Makefile
@@ -1,6 +1,25 @@
 --- Makefile.orig	2021-02-23 21:29:06 UTC
 +++ Makefile
-@@ -99,7 +99,6 @@ endif
+@@ -11,7 +11,18 @@ ldflags_for_gmp=-L/usr/local/lib -lgmpxx -lgmp
+ GMP_INC_DIR=/usr/local/include
+ ldflags_for_gmp=-L/usr/local/lib -lgmpxx -lgmp
+ 
++# Applied patch from https://github.com/Macaulay2/frobby/commit/5b9e4ac4057f5693f53c321eeb5bfb387f6b69fb
++# This patch will probably become obsolete in some later release.
+ 
++# shared library version
++# bump if interfaces added, removed, or changed
++FROBBY_CURRENT = 1
++# bump at every release, set to 0 if any interfaces added, removed, or changed
++FROBBY_REVISION = 0
++# bump if interfaces added, set to 0 if removed or changed
++FROBBY_AGE = 0
++FROBBY_SOVERSION := $(shell expr $(FROBBY_CURRENT) - $(FROBBY_AGE))
++FROBBY_VERSION := $(FROBBY_SOVERSION).$(FROBBY_AGE).$(FROBBY_REVISION)
+ 
+ rawSources := main.cpp Action.cpp IOParameters.cpp						\
+   IrreducibleDecomAction.cpp fplllIO.cpp IOHandler.cpp fourti2.cpp		\
+@@ -99,7 +110,6 @@ ifeq ($(MODE), release)
  MATCH=false
  ifeq ($(MODE), release)
    outdir = bin/release/
@@ -8,7 +27,7 @@
    MATCH=true
  endif
  ifeq ($(MODE), debug)
-@@ -111,13 +110,13 @@ ifeq ($(MODE), debug)
+@@ -111,13 +121,13 @@ ifeq ($(MODE), shared)
  endif
  ifeq ($(MODE), shared)
    outdir = bin/shared/
@@ -24,3 +43,17 @@
    ldflags += -pg
    MATCH=true
    benchArgs = _profile $(FROBBYARGS)
+@@ -225,7 +235,12 @@ ifeq ($(MODE), shared)
+ bin/$(library): $(objs) | bin/
+ 	rm -f bin/$(library)
+ ifeq ($(MODE), shared)
+-	$(CXX) -shared -o bin/$(library) $(ldflags) \
++
++# Applied patch from https://github.com/Macaulay2/frobby/commit/5b9e4ac4057f5693f53c321eeb5bfb387f6b69fb
++# This patch will probably become obsolete in some later release.
++
++	$(CXX) -shared -Wl,-soname,$(library).$(FROBBY_SOVERSION) \
++	-o bin/$(library).$(FROBBY_VERSION) $(ldflags) \
+ 	  $(patsubst $(outdir)main.o,,$(objs)) -lgmp -lgmpxx
+ else
+ 	ar crs bin/$(library) $(patsubst $(outdir)main.o,,$(objs))
Index: math/frobby/pkg-plist
===================================================================
--- math/frobby/pkg-plist
+++ math/frobby/pkg-plist
@@ -1663,4 +1663,5 @@
 %%LIBRARY%%include/frobby.h
 %%STATIC%%lib/libfrobby.a
 %%SHARED%%lib/libfrobby.so
-%%SHARED%%lib/libfrobby.so.0
+%%SHARED%%lib/libfrobby.so.1
+%%SHARED%%lib/libfrobby.so.1.0.0