[pkgsrc/trunk]: pkgsrc/mk/compiler Test that the lang/gccN exists before defa...

[maya <maya%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/21cf5f0abdd1
branches:  trunk
changeset: 424218:21cf5f0abdd1
user:      maya <maya%pkgsrc.org@localhost>
date:      Sat Mar 07 15:18:19 2020 +0000

description:
Test that the lang/gccN exists before defaulting to N as the gfortran version.

Issue most immediately obvious when trying GCC 9, but probably applies to
some other versions as well.

diffstat:

 mk/compiler/gfortran.mk |  9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diffs (23 lines):

diff -r b6531355382d -r 21cf5f0abdd1 mk/compiler/gfortran.mk
--- a/mk/compiler/gfortran.mk   Sat Mar 07 15:11:52 2020 +0000
+++ b/mk/compiler/gfortran.mk   Sat Mar 07 15:18:19 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: gfortran.mk,v 1.11 2020/02/26 15:58:20 bacon Exp $
+# $NetBSD: gfortran.mk,v 1.12 2020/03/07 15:18:19 maya Exp $
 #
 # Copyright (c) 2005 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -36,8 +36,11 @@
 # If pkgsrc base compiler is GCC, match the gfortran requirement as closely as
 # possible.  Otherwise, default to a mainstream version and hope for the best.
 # If base compiler is clang, we really should use flang rather than gfortran.
-.if ${PKGSRC_COMPILER} == gcc
-GFORTRAN_VERSION?=     ${CC_VERSION:C/.[0-9].[0-9]$//:S/gcc-//}
+POSSIBLE_GFORTRAN_VERSION?=    ${CC_VERSION:C/.[0-9].[0-9]//:S/gcc-//}
+
+.if (${PKGSRC_COMPILER} == gcc) && \
+    exists(${PKGSRCDIR}/lang/gcc${POSSIBLE_GFORTRAN_VERSION}/buildlink3.mk)
+GFORTRAN_VERSION?=             ${POSSIBLE_GFORTRAN_VERSION}
 .else
 GFORTRAN_VERSION?=     7
 .endif