diff --git a/math/glpk/Makefile b/math/glpk/Makefile
index 0705112a004b..a47b02689582 100644
--- a/math/glpk/Makefile
+++ b/math/glpk/Makefile
@@ -1,43 +1,72 @@
 # New ports collection makefile for:	GLPK
 # Date created:		16 December 2000
 # Whom:			Dmitry Sivachenko <demon@FreeBSD.org>
 #
 # $FreeBSD$
 #
 
 PORTNAME=	glpk
-PORTVERSION=	4.25
+PORTVERSION=	4.28
 CATEGORIES=	math
 MASTER_SITES=	${MASTER_SITE_GNU}
 MASTER_SITE_SUBDIR=	glpk
 
 MAINTAINER=	demon@FreeBSD.org
 COMMENT=	A GNU Linear Programming Kit
 
 LIB_DEPENDS=	gmp:${PORTSDIR}/math/libgmp4
 
+OPTIONS=	IODBC	"Enable MathProg iodbc support" Off \
+		MYSQL	"Enable MathProg mysql support" Off
+
 GNU_CONFIGURE=	yes
 USE_GMAKE=	yes
 USE_LDCONFIG=	yes
 CFLAGS+=	-trigraphs
 CPPFLAGS+=	-I${LOCALBASE}/include
 LDFLAGS+=	-L${LOCALBASE}/lib
 CONFIGURE_ENV=	CPPFLAGS="${CPPFLAGS}" LDFLAGS="${LDFLAGS}"
 
+.include <bsd.port.pre.mk>
+
+.ifdef(WITH_IODBC || WITH_MYSQL)
+CONFIGURE_ARGS+=	--enable-dl=dlfcn
+.else
+CONFIGURE_ARGS+=	--disable-dl
+.endif
+
+.ifdef(WITH_IODBC)
+CONFIGURE_ARGS+=	--enable-odbc
+LIB_DEPENDS+=		iodbc.3:${PORTSDIR}/databases/libiodbc
+.else
+CONFIGURE_ARGS+=	--disable-odbc
+.endif
+
+.ifdef(WITH_MYSQL)
+CONFIGURE_ARGS+=	--enable-mysql
+USE_MYSQL=		yes
+.else
+CONFIGURE_ARGS+=	--disable-mysql
+.endif
+
 .if !defined(NOPORTDOCS)
 PORTDOCS=	bench.txt bench1.txt glpk.ps glpk_faq.txt gmpl.ps \
-		gomory.djvu opb.txt
+		gomory.djvu opb.txt tables.txt
 .endif
 
+post-patch:
+	@${REINPLACE_CMD} -e "s;\/usr\/include\/mysql;${LOCALBASE}\/include\/mysql;g" \
+	${WRKSRC}/configure
+
 post-install:
 	@${INSTALL_DATA} ${WRKSRC}/include/*.h ${PREFIX}/include/
 
 .if !defined(NOPORTDOCS)
 	@${CP} ${WRKSRC}/doc/memo/gomory.djvu ${WRKSRC}/doc/
 	@${MKDIR} ${DOCSDIR}
 	for docfile in ${PORTDOCS} ; do \
 		${INSTALL_MAN} ${WRKSRC}/doc/$${docfile} ${DOCSDIR} ; \
 	done
 .endif
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>
diff --git a/math/glpk/distinfo b/math/glpk/distinfo
index 7e215bc27f4d..190a567c0995 100644
--- a/math/glpk/distinfo
+++ b/math/glpk/distinfo
@@ -1,3 +1,3 @@
-MD5 (glpk-4.25.tar.gz) = 3bd85385acb1123a2b62420af45bcc39
-SHA256 (glpk-4.25.tar.gz) = a178a5ac51d4f344090bd71782f229c7cf69ba86f185c494f57a61d6f2948841
-SIZE (glpk-4.25.tar.gz) = 1487597
+MD5 (glpk-4.28.tar.gz) = 6e4f30c37fb189aec6c71b27f0a57449
+SHA256 (glpk-4.28.tar.gz) = 8faeb202e58a3a9f6a6a8b0e8ae557bcc30f712060b4871a530f070c14939fd8
+SIZE (glpk-4.28.tar.gz) = 1546104
diff --git a/math/glpk/pkg-plist b/math/glpk/pkg-plist
index 2ed84592fd9e..ca413c66cb4e 100644
--- a/math/glpk/pkg-plist
+++ b/math/glpk/pkg-plist
@@ -1,33 +1,37 @@
 bin/glpsol
 include/glpapi.h
 include/glpavl.h
 include/glpbfd.h
 include/glpbfx.h
+include/glpcli.h
 include/glpdmp.h
 include/glpfhv.h
 include/glpgmp.h
 include/glphbm.h
 include/glpios.h
 include/glpipm.h
 include/glpipp.h
 include/glpk.h
 include/glplib.h
 include/glplpf.h
 include/glplpp.h
 include/glpluf.h
 include/glplux.h
 include/glpmat.h
 include/glpmpl.h
 include/glppds.h
 include/glpqmd.h
+include/glprgr.h
 include/glprng.h
 include/glpscf.h
 include/glpscg.h
+include/glpspm.h
 include/glpspx.h
+include/glpsql.h
 include/glpssx.h
 include/glpstd.h
 include/glptsp.h
 lib/libglpk.a
 lib/libglpk.la
 lib/libglpk.so
-lib/libglpk.so.10
+lib/libglpk.so.13