math/libflame: allow Python > 3.8

- Don’t limit to Python-3.8
- Also fix options.

PR:		274569
Approved by:	maintainer’s time-out (jmd@)

math/libflame/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	libflame
 DISTVERSION=	5.2.0
+PORTREVISION=	1
 CATEGORIES=	math
 
 MAINTAINER=	jmd@FreeBSD.org
@@ -14,8 +15,11 @@ ONLY_FOR_ARCHS_REASON=	make system does not support other architectures yet
 BUILD_DEPENDS=	bash:shells/bash
 
 GNU_CONFIGURE=	yes
-USES=		compiler:c11 gmake python:3.8
+USES=		compiler:c11 gmake python:build shebangfix
+SHEBANG_FILES=	build/flatten-headers.py
 USE_CSTD=	c99
+OPENMP_CFLAGS?=	-fopenmp
+
 USE_GITHUB=	yes
 GH_ACCOUNT=	flame
 USE_LDCONFIG=	yes
@@ -46,12 +50,14 @@ CONFIGURE_ARGS+=	--enable-default-${b:tl}-blocksize=${${b}_BLOCKSIZE}
 .endif
 .endfor
 
-.include <bsd.port.options.mk>
+MAKE_ENV+=	PYTHON=${PYTHON_CMD}
+
+.include <bsd.port.pre.mk>
+
 .if ${PORT_OPTIONS:MOPENMP}
 .if ${CHOSEN_COMPILER_TYPE} == clang
 IGNORE=		clang does not support OPENMP, use THREADS instead
 .endif
-OPENMP_CFLAGS ?=	-fopenmp
 CFLAGS+=		${OPENMP_CFLAGS}
 LDFLAGS+=		${OPENMP_CFLAGS}
 CONFIGURE_ARGS+=	--enable-multithreading=openmp
@@ -70,4 +76,4 @@ CONFIGURE_ARGS+=	--disable-autodetect-f77-ldflags \
 #	@${MKDIR} ${STAGEDIR}${PREFIX}/include/libflame
 #	${INSTALL_DATA} ${WRKSRC}/include_local/* ${STAGEDIR}/${PREFIX}/include/libflame/
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>

math/libflame/files/patch-build_flatten-headers_py.diff

@@ -1,8 +0,0 @@
---- build/flatten-headers.py.orig	2020-05-02 16:30:41.773805000 -0500
-+++ build/flatten-headers.py	2020-05-02 16:30:49.511257000 -0500
-@@ -1,4 +1,4 @@
--#!/usr/bin/env python
-+#!/usr/bin/env python3.8
- #
- #  BLIS    
- #  An object-based framework for developing high-performance BLAS-like