git: 9a521a21bc60 - main - audio/festival: fix build with clang 16

The branch main has been updated by dim:

URL: https://cgit.FreeBSD.org/ports/commit/?id=9a521a21bc60d34292ce87e3099f52ec9232d022

commit 9a521a21bc60d34292ce87e3099f52ec9232d022
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2023-06-15 16:31:34 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2023-06-16 18:03:01 +0000

    audio/festival: fix build with clang 16
    
    Since clang 16 (and gcc 11) the default C++ standard is now gnu++17.
    Because audio/festival's build infrastructure does not explicitly set
    its C++ standard, this leads to an error:
    
      regexp.cc:178:22: error: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
      STATIC char *regnext(register char *p);
                           ^~~~~~~~~
    
    To work around the error, add USE_CXXSTD=gnu++11 to compile for C++11
    with GNU extensions instead. While here, pet portlint a little.
    
    PR:             272014
    Approved by:    fernape
    MFH:            2023Q2
---
 audio/festival/Makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/audio/festival/Makefile b/audio/festival/Makefile
index 05001c346ef7..b9ce50db94b5 100644
--- a/audio/festival/Makefile
+++ b/audio/festival/Makefile
@@ -24,12 +24,14 @@ MAINTAINER=	mi@aldan.algebra.com
 COMMENT=	Multi-lingual speech synthesis system
 WWW=		https://www.cstr.ed.ac.uk/projects/festival/
 
+USES=		gmake
+USE_CXXSTD=	gnu++11
+
 OPTIONS_DEFINE=	NAS
 OPTIONS_DEFAULT=NAS
 
 CXXFLAGS+=	-DFTLIBDIR=${LOCALBASE}/share/festival/lib -fno-delete-null-pointer-checks
 CONFIGURE_WRKSRC=${WRKDIR}/festival
-USES=		gmake
 SPEECHTOOLS=	${WRKSRC}/speech_tools
 FESTIVAL=	${WRKSRC}/festival
 MAKE_ARGS+=	CC="${CCACHE_BIN} ${CC}" GCC="${CCACHE_BIN} ${CC}" \