Welcome GCC 9.1, the first release of the GCC 9 series!

https://gcc.gnu.org/gcc-9/changes.html has a comprehensive overview of
many improvements and changes and https://gcc.gnu.org/gcc-8/porting_to.html
addresses issues you may encounter porting to this new version, though
this release series should have fewer of those than previous ones.

To provide a brief overview of some of the more noticable changes:

GCC's diagnostics now print source code with a left margin showing line
numbers.  This is configurable via -fno-diagnostics-show-line-numbers.
Plus there have been lots of further improvements around diagnostic
messages in general as -fopt-info.

As usual a large number of improvements to code generation, including
but by far not limited to the following:
 - Switch expansion (into expressions).
 - Inliner defaults are tuned to better suit modern C++ codebases,
   especially when built with link time optimizations.
 - Hot/cold partitioning is now more precise and aggressive.
 - Improved scalability for very large translation units.
 - Link-time optimization improvements including faster compilation.

A new option -flive-patching=[inline-only-static|inline-clone] has
been introduced to provide a safe compilation for live-patching.

A new pair of profiling options -fprofile-filter-files and
-fprofile-exclude-files help filter which source files are instrumented.

New built-in functions __builtin_expect_with_probability,
__builtin_has_attribute, and __builtin_speculation_safe_value.

Significant effort has been put into refining existing compiler warnings
and adding additional diagnostics. One notable addition is -Wabsolute-value
which warns for calls to standard functions that compute the absolute value
of an argument when a more appropriate standard function is available. For
example, calling abs(3.14) warns because the appropriate function to
compute the absolute value of a double argument is fabs.

The spelling corrector now considers transposed letters, and the threshold
for similarity has been tightened, to avoid nonsensical suggestions.

A new option --completion provides better option completion in a shell
(such as bash).

OpenACC support in C, C++, and Fortran continues to be maintained and
improved. Most of the OpenACC 2.5 specification is implemented.

Version 5.0 of the OpenMP specification is now partially supported in
the C and C++ compilers.

There is now experimental support for the upcoming C2X revision of the
ISO C standard (via the -std=c2x and similar options).

The C++ front end has experimental support for some of the upcoming
C++2a draft features, enabled by the -std=c++2a or -std=gnu++2a options.
This includes range-based for statements with initializer, default
constructible and assignable stateless lambdas, lambdas in unevaluated
contexts, language support for empty data members, allowing pack expansion
in lambda init-capture, likely and unlikely attributes, class types in
non-type template parameters, allowing virtual function calls in constant
expressions, explicit(bool), std::is_constant_evaluated, nested inline
namespaces, etc.

The C++17 implementation is no longer experimental and parallel algorithms
and <execution> and <memory_resource> are available.  Using the types and
functions in <filesystem> does not require linking with -lstdc++fs any more.

On the Fortran side asynchronous I/O is now fully supported; FINDLOC and
IS_CONTIGUOUS and other intrinsics have been implemented.

The MAX and MIN intrinsics are no longer guaranteed to return any
particular value in case one of the arguments is a NaN. This conforms
with the Fortran standard and what other Fortran compilers do.

A new option -fdec-include, set also by -fdec, has been added for
compatibility with legacy code.  With this option, the INCLUDE directive
is parsed also as a statement, which allows it to be written on multiple
source lines with line continuations.

Support for the Cell Broadband Engine (SPU), and thus powerpcspe on
FreeBSD as well, has been removed for lack of upstream maintainership.

Also there's been a minor ABI change on arm* targets (that GCC warns
about by default, controlled by the -Wpsabi option).

Support for the D programming language has been added to GCC, implementing
version 2.076 of the language and run-time library, though this port does
not enable this yet.  Volunteers welcome to test and contribute.

10 files changed, 498 insertions, 0 deletions

diff --git a/lang/Makefile b/lang/Makefile
index 13f37d568d62..b3a816a41c65 100644
--- a/lang/Makefile
+++ b/lang/Makefile
@@ -110,6 +110,7 @@
     SUBDIR += gcc7-devel
     SUBDIR += gcc8
     SUBDIR += gcc8-devel
+    SUBDIR += gcc9
     SUBDIR += gcc9-devel
     SUBDIR += gforth
     SUBDIR += ghc
diff --git a/lang/gcc9/Makefile b/lang/gcc9/Makefile
new file mode 100644
index 000000000000..c0043ee93e3b
--- /dev/null
+++ b/lang/gcc9/Makefile
@@ -0,0 +1,151 @@
+# Created by: Gerald Pfeifer <gerald@FreeBSD.org>
+# $FreeBSD$
+
+PORTNAME=	gcc
+PORTVERSION=	9.1.0
+CATEGORIES=	lang
+MASTER_SITES=	GCC
+PKGNAMESUFFIX=	${SUFFIX}
+
+MAINTAINER=	gerald@FreeBSD.org
+COMMENT=	GNU Compiler Collection 9
+
+LICENSE=	GPLv3 GPLv3RLE
+LICENSE_COMB=	multi
+
+ONLY_FOR_ARCHS=	aarch64 amd64 arm armv6 armv7 i386 powerpc powerpc64 sparc64
+
+LIB_DEPENDS=	libgmp.so:math/gmp \
+		libmpfr.so:math/mpfr \
+		libmpc.so:math/mpc
+BUILD_DEPENDS+=	${LOCALBASE}/bin/as:devel/binutils
+RUN_DEPENDS+=	${LOCALBASE}/bin/as:devel/binutils
+.if defined(MAINTAINER_MODE)
+BUILD_DEPENDS+=	runtest:misc/dejagnu
+.endif
+
+USES=		compiler cpe gmake iconv libtool makeinfo perl5 tar:xz
+USE_BINUTILS=	yes
+USE_PERL5=	build
+
+CONFLICTS=	gcc9-devel-9.*
+
+CPE_VENDOR=	gnu
+
+GCC_VERSION=	${PORTVERSION}
+SUFFIX=		${PORTVERSION:C/([0-9]+).*/\1/}
+SSP_UNSAFE=	yes
+CFLAGS:=	${CFLAGS:N-mretpoline}
+CXXFLAGS:=	${CXXFLAGS:N-mretpoline}
+
+OPTIONS_DEFINE=		BOOTSTRAP GRAPHITE
+OPTIONS_DEFAULT=	BOOTSTRAP
+BOOTSTRAP_DESC=		Build using a full bootstrap
+GRAPHITE_DESC=		Support for Graphite loop optimizations
+
+.if exists(/usr/lib32/libc.so)
+OPTIONS_DEFINE_amd64+=		MULTILIB
+OPTIONS_DEFAULT_amd64+=	MULTILIB
+OPTIONS_DEFINE_powerpc64+=	MULTILIB
+OPTIONS_DEFAULT_powerpc64+=	MULTILIB
+MULTILIB_DESC=		Build support for 32-bit and 64-bit targets
+MULTILIB_CONFIGURE_ENABLE=	multilib
+.else
+CONFIGURE_ARGS+=	--disable-multilib
+.endif
+
+.include <bsd.port.pre.mk>
+
+.if ${ARCH} == amd64
+CONFIGURE_TARGET=	x86_64-portbld-${OPSYS:tl}${OSREL}
+
+.elif ${ARCH} == powerpc64
+CONFIGURE_ENV+=	UNAME_m="powerpc64"
+USE_GCC=	yes
+.endif
+
+LANGUAGES:=	c,c++,objc,fortran
+TARGLIB=	${PREFIX}/lib/gcc${SUFFIX}
+TARGLIB32=	${PREFIX}/lib32	# The version information is added later
+LIBEXEC=	${PREFIX}/libexec/gcc${SUFFIX}
+GNU_CONFIGURE=	yes
+CONFIGURE_OUTSOURCE=	yes
+.if empty(PORT_OPTIONS:MBOOTSTRAP)
+CONFIGURE_ARGS+=--disable-bootstrap
+.else
+CONFIGURE_ARGS+=--with-build-config=bootstrap-debug
+ALL_TARGET=	bootstrap-lean
+.endif
+INSTALL_TARGET=	install-strip
+.if ${UID} != 0
+BINMODE=	755
+.endif
+CONFIGURE_ARGS+=--disable-nls \
+		--enable-gnu-indirect-function \
+		--libdir=${TARGLIB} \
+		--libexecdir=${LIBEXEC} \
+		--program-suffix=${SUFFIX} \
+		--with-as=${LOCALBASE}/bin/as \
+		--with-gmp=${LOCALBASE} \
+		--with-gxx-include-dir=${TARGLIB}/include/c++/ \
+		--with-ld=${LOCALBASE}/bin/ld \
+		${ICONV_CONFIGURE_ARG} \
+		--with-pkgversion="FreeBSD Ports Collection" \
+		--with-system-zlib
+MAKE_ARGS+=	MAKEINFOFLAGS="--no-split"
+USE_LDCONFIG=	${TARGLIB}
+PLIST_SUB+=	GCC_VERSION=${GCC_VERSION} \
+		GNU_HOST=${CONFIGURE_TARGET} \
+		SUFFIX=${SUFFIX}
+INFO=		gcc${SUFFIX}/cpp \
+		gcc${SUFFIX}/cppinternals \
+		gcc${SUFFIX}/gcc \
+		gcc${SUFFIX}/gccinstall \
+		gcc${SUFFIX}/gccint \
+		gcc${SUFFIX}/gfortran \
+		gcc${SUFFIX}/libgomp
+# Release tarballs (as opposed to snapshots) always carry this.
+INFO+=		gcc${SUFFIX}/libquadmath \
+		gcc${SUFFIX}/libitm
+SUB_FILES=	pkg-message
+SUB_LIST+=	TARGLIB=${TARGLIB}
+
+.if ${PORT_OPTIONS:MGRAPHITE}
+LIB_DEPENDS+=	libisl.so:devel/isl
+CONFIGURE_ARGS+=--with-isl=${LOCALBASE}
+.endif
+
+CONFIGURE_ARGS+=--enable-languages=${LANGUAGES}
+
+pre-everything::
+	@${ECHO_MSG} "Making GCC ${PORTVERSION} for ${CONFIGURE_TARGET} [${LANGUAGES}]"
+
+pre-configure:
+	cd ${WRKSRC} ; contrib/gcc_update --touch
+	@${RM} ${WRKSRC}/gcc/*/*.info*
+
+.if defined(MAINTAINER_MODE)
+full-regression-test: build
+	cd ${TEST_WRKSRC}; ${MAKE_CMD} -sk check \
+	; ${WRKSRC}/contrib/test_summary
+.endif
+
+post-stage:
+	${RM} ${STAGEDIR}${PREFIX}/man/man7/*
+	${RM} -r ${STAGEDIR}${TARGLIB}/gcc/*/${GCC_VERSION}/include-fixed/
+	# Add target libraries and include files to packaging list.
+	${RM} ${WRKDIR}/PLIST.lib
+
+.if (${ARCH} == amd64 || ${ARCH} == powerpc64) && ${PORT_OPTIONS:MMULTILIB}
+	${MKDIR} ${STAGEDIR}${TARGLIB32}
+	${MV} ${STAGEDIR}${PREFIX}/lib/lib32 ${STAGEDIR}${TARGLIB32}/gcc${SUFFIX}
+.endif
+
+.for d in ${TARGLIB:S/^${PREFIX}\///} ${TARGLIB32:S/^${PREFIX}\///} ${LIBEXEC:S/^${PREFIX}\///}
+	cd ${STAGEDIR}${PREFIX} ; if [ -d $d ]; then \
+	    ${FIND} $d -type f -o -type l >>${WRKDIR}/PLIST.lib ;\
+	fi
+.endfor
+	cd ${WRKDIR} ; ${SED} -i -e "/PLIST.lib/ r PLIST.lib" ${TMPPLIST}
+
+.include <bsd.port.post.mk>
diff --git a/lang/gcc9/distinfo b/lang/gcc9/distinfo
new file mode 100644
index 000000000000..bd98015884f7
--- /dev/null
+++ b/lang/gcc9/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1557690023
+SHA256 (gcc-9.1.0.tar.xz) = 79a66834e96a6050d8fe78db2c3b32fb285b230b855d0a66288235bc04b327a0
+SIZE (gcc-9.1.0.tar.xz) = 70546856
diff --git a/lang/gcc9/files/patch-amd64-gcc-multilib-support b/lang/gcc9/files/patch-amd64-gcc-multilib-support
new file mode 100644
index 000000000000..ffae93210614
--- /dev/null
+++ b/lang/gcc9/files/patch-amd64-gcc-multilib-support
@@ -0,0 +1,73 @@
+--- UTC
+Index: gcc/config.gcc
+===================================================================
+--- gcc/config.gcc	(revision 269726)
++++ gcc/config.gcc	(working copy)
+@@ -4925,8 +4925,11 @@
+ 		;;
+ 	i[34567]86-*-dragonfly* | x86_64-*-dragonfly*)
+ 		;;
+-	i[34567]86-*-freebsd* | x86_64-*-freebsd*)
++	i[34567]86-*-freebsd*)
+ 		;;
++	x86_64-*-freebsd*)
++		tmake_file="${tmake_file} i386/t-freebsd64"
++		;;
+ 	ia64*-*-linux*)
+ 		;;
+ 
+Index: gcc/config/i386/freebsd64.h
+===================================================================
+--- gcc/config/i386/freebsd64.h	(revision 269733)
++++ gcc/config/i386/freebsd64.h	(working copy)
+@@ -31,7 +31,7 @@
+ 
+ #undef	LINK_SPEC
+ #define LINK_SPEC "\
+-  %{m32:-m elf_i386_fbsd} \
++  %{m32:-m elf_i386_fbsd}%{!m32:-m elf_x86_64_fbsd} \
+   %{p:%nconsider using '-pg' instead of '-p' with gprof(1)} \
+   %{v:-V} \
+   %{assert*} %{R*} %{rpath*} %{defsym*} \
+@@ -42,3 +42,6 @@
+ 	-dynamic-linker %(fbsd_dynamic_linker) } \
+     %{static:-Bstatic}} \
+   %{symbolic:-Bsymbolic}"
++
++#undef	MULTILIB_DEFAULTS
++#define MULTILIB_DEFAULTS { "m64" }
+Index: gcc/config/i386/t-freebsd64
+===================================================================
+--- gcc/config/i386/t-freebsd64	(nonexistent)
++++ gcc/config/i386/t-freebsd64	(working copy)
+@@ -0,0 +1,30 @@
++# Copyright (C) 2019 Free Software Foundation, Inc.
++#
++# This file is part of GCC.
++#
++# GCC is free software; you can redistribute it and/or modify
++# it under the terms of the GNU General Public License as published by
++# the Free Software Foundation; either version 3, or (at your option)
++# any later version.
++#
++# GCC is distributed in the hope that it will be useful,
++# but WITHOUT ANY WARRANTY; without even the implied warranty of
++# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++# GNU General Public License for more details.
++#
++# You should have received a copy of the GNU General Public License
++# along with GCC; see the file COPYING3.  If not see
++# <http://www.gnu.org/licenses/>.
++
++# The 32-bit libraries are found in /usr/lib32
++
++# To support i386 and x86-64, the directory structrue
++# should be:
++#
++# 	/lib has x86-64 libraries.
++# 	/lib32 has i386 libraries.
++#
++
++MULTILIB_OPTIONS    = m32
++MULTILIB_DIRNAMES   = 32
++MULTILIB_OSDIRNAMES = ../lib32
diff --git a/lang/gcc9/files/patch-arm-unwind-cxx-support b/lang/gcc9/files/patch-arm-unwind-cxx-support
new file mode 100644
index 000000000000..ec6959b9655c
--- /dev/null
+++ b/lang/gcc9/files/patch-arm-unwind-cxx-support
@@ -0,0 +1,106 @@
+--- UTC
+Index: gcc/ginclude/unwind-arm-common.h
+===================================================================
+--- gcc/ginclude/unwind-arm-common.h	(revision 219113)
++++ gcc/ginclude/unwind-arm-common.h	(working copy)
+@@ -82,7 +82,11 @@
+ 
+   struct _Unwind_Control_Block
+     {
++#ifdef __FreeBSD__
++      unsigned exception_class __attribute__((__mode__(__DI__)));
++#else
+       char exception_class[8];
++#endif
+       void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block *);
+       /* Unwinder cache, private fields for the unwinder's use */
+       struct
+@@ -181,7 +185,11 @@
+ 
+   /* Support functions for the PR.  */
+ #define _Unwind_Exception _Unwind_Control_Block
++#ifdef __FreeBSD__
++  typedef unsigned _Unwind_Exception_Class __attribute__((__mode__(__DI__)));
++#else
+   typedef char _Unwind_Exception_Class[8];
++#endif
+ 
+   void * _Unwind_GetLanguageSpecificData (_Unwind_Context *);
+   _Unwind_Ptr _Unwind_GetRegionStart (_Unwind_Context *);
+Index: libstdc++-v3/libsupc++/unwind-cxx.h
+===================================================================
+--- libstdc++-v3/libsupc++/unwind-cxx.h	(revision 219147)
++++ libstdc++-v3/libsupc++/unwind-cxx.h	(working copy)
+@@ -235,7 +235,7 @@
+   return reinterpret_cast<__cxa_dependent_exception *>(exc + 1) - 1;
+ }
+ 
+-#ifdef __ARM_EABI_UNWINDER__
++#if defined(__ARM_EABI_UNWINDER__) && !defined(__FreeBSD__)
+ static inline bool
+ __is_gxx_exception_class(_Unwind_Exception_Class c)
+ {
+@@ -309,13 +309,7 @@
+   c[6] = 'R';
+   c[7] = '\0';
+ }
+-
+-static inline void*
+-__gxx_caught_object(_Unwind_Exception* eo)
+-{
+-  return (void*)eo->barrier_cache.bitpattern[0];
+-}
+-#else // !__ARM_EABI_UNWINDER__
++#else // !__ARM_EABI_UNWINDER__ || __FreeBSD__
+ // This is the primary exception class we report -- "GNUCC++\0".
+ const _Unwind_Exception_Class __gxx_primary_exception_class
+ = ((((((((_Unwind_Exception_Class) 'G' 
+@@ -339,6 +333,16 @@
+     << 8 | (_Unwind_Exception_Class) '+')
+    << 8 | (_Unwind_Exception_Class) '\x01');
+ 
++const _Unwind_Exception_Class __gxx_forced_unwind_class
++= ((((((((_Unwind_Exception_Class) 'G'
++        << 8 | (_Unwind_Exception_Class) 'N')
++       << 8 | (_Unwind_Exception_Class) 'U')
++      << 8 | (_Unwind_Exception_Class) 'C')
++     << 8 | (_Unwind_Exception_Class) 'F')
++    << 8 | (_Unwind_Exception_Class) 'O')
++   << 8 | (_Unwind_Exception_Class) 'R')
++  << 8 | (_Unwind_Exception_Class) '\0');
++
+ static inline bool
+ __is_gxx_exception_class(_Unwind_Exception_Class c)
+ {
+@@ -346,6 +350,12 @@
+       || c == __gxx_dependent_exception_class;
+ }
+ 
++static inline bool
++__is_gxx_forced_unwind_class(_Unwind_Exception_Class c)
++{
++  return c ==  __gxx_forced_unwind_class;
++}
++
+ // Only checks for primary or dependent, but not that it is a C++ exception at
+ // all.
+ static inline bool
+@@ -357,7 +367,18 @@
+ #define __GXX_INIT_PRIMARY_EXCEPTION_CLASS(c) c = __gxx_primary_exception_class
+ #define __GXX_INIT_DEPENDENT_EXCEPTION_CLASS(c) \
+   c = __gxx_dependent_exception_class
++#define __GXX_INIT_FORCED_UNWIND_CLASS(c) c = __gxx_forced_unwind_class 
++#endif // __ARM_EABI_UNWINDER__ && !__FreeBSD__
+ 
++#ifdef __ARM_EABI_UNWINDER__
++static inline void*
++__gxx_caught_object(_Unwind_Exception* eo)
++{
++    return (void*)eo->barrier_cache.bitpattern[0];
++}
++
++#else // !__ARM_EABI_UNWINDER__
++
+ // GNU C++ personality routine, Version 0.
+ extern "C" _Unwind_Reason_Code __gxx_personality_v0
+      (int, _Unwind_Action, _Unwind_Exception_Class,
diff --git a/lang/gcc9/files/patch-gets-no-more b/lang/gcc9/files/patch-gets-no-more
new file mode 100644
index 000000000000..4b49aba3ca28
--- /dev/null
+++ b/lang/gcc9/files/patch-gets-no-more
@@ -0,0 +1,47 @@
+Disable the build/use of libssp/gets-chk since FreeBSD 12 and later
+do not feature gets() any longer.
+
+--- UTC
+Index: libssp/Makefile.am
+===================================================================
+--- libssp/Makefile.am	(revision 263319)
++++ libssp/Makefile.am	(working copy)
+@@ -42,7 +42,7 @@
+ nobase_libsubinclude_HEADERS = ssp/ssp.h ssp/string.h ssp/stdio.h ssp/unistd.h
+ 
+ libssp_la_SOURCES = \
+-	ssp.c gets-chk.c memcpy-chk.c memmove-chk.c mempcpy-chk.c \
++	ssp.c memcpy-chk.c memmove-chk.c mempcpy-chk.c \
+ 	memset-chk.c snprintf-chk.c sprintf-chk.c stpcpy-chk.c \
+ 	strcat-chk.c strcpy-chk.c strncat-chk.c strncpy-chk.c \
+ 	vsnprintf-chk.c vsprintf-chk.c
+Index: libssp/Makefile.in
+===================================================================
+--- libssp/Makefile.in	(revision 263319)
++++ libssp/Makefile.in	(working copy)
+@@ -108,7 +108,7 @@
+ am__installdirs = "$(DESTDIR)$(toolexeclibdir)" \
+ 	"$(DESTDIR)$(libsubincludedir)"
+ LTLIBRARIES = $(toolexeclib_LTLIBRARIES)
+-am_libssp_la_OBJECTS = ssp.lo gets-chk.lo memcpy-chk.lo memmove-chk.lo \
++am_libssp_la_OBJECTS = ssp.lo memcpy-chk.lo memmove-chk.lo \
+ 	mempcpy-chk.lo memset-chk.lo snprintf-chk.lo sprintf-chk.lo \
+ 	stpcpy-chk.lo strcat-chk.lo strcpy-chk.lo strncat-chk.lo \
+ 	strncpy-chk.lo vsnprintf-chk.lo vsprintf-chk.lo
+@@ -291,7 +291,7 @@
+ libsubincludedir = $(libdir)/gcc/$(target_noncanonical)/$(gcc_version)/include
+ nobase_libsubinclude_HEADERS = ssp/ssp.h ssp/string.h ssp/stdio.h ssp/unistd.h
+ libssp_la_SOURCES = \
+-	ssp.c gets-chk.c memcpy-chk.c memmove-chk.c mempcpy-chk.c \
++	ssp.c memcpy-chk.c memmove-chk.c mempcpy-chk.c \
+ 	memset-chk.c snprintf-chk.c sprintf-chk.c stpcpy-chk.c \
+ 	strcat-chk.c strcpy-chk.c strncat-chk.c strncpy-chk.c \
+ 	vsnprintf-chk.c vsprintf-chk.c
+@@ -452,7 +452,6 @@
+ distclean-compile:
+ 	-rm -f *.tab.c
+ 
+-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gets-chk.Plo@am__quote@
+ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libssp_nonshared_la-ssp-local.Plo@am__quote@
+ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/memcpy-chk.Plo@am__quote@
+ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/memmove-chk.Plo@am__quote@
diff --git a/lang/gcc9/files/patch-gfortran-libgcc b/lang/gcc9/files/patch-gfortran-libgcc
new file mode 100644
index 000000000000..89c6cb902c42
--- /dev/null
+++ b/lang/gcc9/files/patch-gfortran-libgcc
@@ -0,0 +1,70 @@
+GCC has two runtime libraries:  The static library libgcc.a (-lgcc) and
+the shared library libgcc_s.so (-lgcc_s).  Both implement many of the
+same functions but they also each have their unique functions.  When
+gcc links programs and libraries there are three possibilities:
+
+1. gcc -static-libgcc or gcc -static: -lgcc
+   => Just use libgcc.a.
+
+2. gcc -shared-libgcc: -lgcc_s -lgcc
+   => Link with libgcc_s first, so libgcc.a is only used for its unique
+      functions.
+
+3. gcc: -lgcc -Wl,--as-needed -lgcc_s -Wl,--no-as-needed
+   => Link with libgcc.a first so libgcc_s is only used for its unique
+      functions (_Unwind_* functions).
+
+Approach 3 is the default for gcc and it's also what clang and clang++ use;
+approach 2 is the default for gfortran, g++ and probably other front ends.
+
+This patch makes 3 the default for gfortran.  It significantly reduces
+the use of libgcc_s.  The _Unwind_* functions are also available in the
+old base system libgcc_s which means this reduces the need for
+-rpath /usr/local/lib/gccN in ports that depend on libraries built with
+gfortran.  Consider a dependency tree like this:
+
+  prog -> libA -> libgcc_s (old base system libgcc_s is fine)
+       -> libB -> libgcc_s (libB built with gfortran, needs new libgcc_s)
+
+Here prog needs to be linked with -rpath /usr/local/lib/gccN even if it's
+a normal C program compiled with clang.  Without -rpath it will fail to
+start because it loads old libgcc_s first as a dependency of libA and then
+it fails to load libB.  With this patch libB works with old base system
+libgcc_s or may not need libgcc_s at all, so prog does not need to be
+linked with -rpath.
+
+Upstream is unlikely accept a patch like this because libgfortran calls
+some _Unwind_* functions and so always needs libgcc_s.  Also because
+every Fortran program and library links to libgfortran it makes sense
+that option 2 above is the default.  On FreeBSD where clang and GCC
+compiled code can be mixed and where multiple libgcc_s may be installed,
+option 3 is just a lot easier to deal with.
+
+The bug that sparked this is PR 208120 (but note there's a lot of
+misleading information in that bug.  CMake is not actually doing
+anything wrong.)
+
+--- UTC
+--- gcc/fortran/gfortranspec.c.orig	2015-06-26 17:47:23 UTC
++++ gcc/fortran/gfortranspec.c
+@@ -404,7 +404,7 @@ For more information about these matters
+ 	}
+     }
+ 
+-#ifdef ENABLE_SHARED_LIBGCC
++#if 0
+   if (library)
+     {
+       unsigned int i;
+
+--- libgfortran/Makefile.in.orig	2019-02-22 14:22:13.000000000 +0000
++++ libgfortran/Makefile.in	2019-02-27 16:27:08.856408000 +0000
+@@ -625,7 +625,7 @@
+ 	$(LTLDFLAGS) $(LIBQUADLIB) ../libbacktrace/libbacktrace.la \
+ 	$(HWCAP_LDFLAGS) \
+ 	-lm $(extra_ldflags_libgfortran) \
+-	$(version_arg) -Wc,-shared-libgcc
++	$(version_arg)
+ 
+ libgfortran_la_DEPENDENCIES = $(version_dep) libgfortran.spec $(LIBQUADLIB_DEP)
+ cafexeclib_LTLIBRARIES = libcaf_single.la
diff --git a/lang/gcc9/files/pkg-message.in b/lang/gcc9/files/pkg-message.in
new file mode 100644
index 000000000000..433c37a3f89b
--- /dev/null
+++ b/lang/gcc9/files/pkg-message.in
@@ -0,0 +1,7 @@
+To ensure binaries built with this toolchain find appropriate versions
+of the necessary run-time libraries, you may want to link using
+
+  -Wl,-rpath=%%TARGLIB%%
+
+For ports leveraging USE_GCC, USES=compiler, or USES=fortran this happens
+transparently.
diff --git a/lang/gcc9/pkg-descr b/lang/gcc9/pkg-descr
new file mode 100644
index 000000000000..f4086c819b50
--- /dev/null
+++ b/lang/gcc9/pkg-descr
@@ -0,0 +1,7 @@
+GCC, the GNU Compiler Collection, supports a number of languages.
+This port installs the C, C++, and Fortran front ends as gcc9, g++9,
+and gfortran9, respectively.
+
+WWW: https://gcc.gnu.org
+
+Gerald Pfeifer <gerald@FreeBSD.org>
diff --git a/lang/gcc9/pkg-plist b/lang/gcc9/pkg-plist
new file mode 100644
index 000000000000..8d302f0800b8
--- /dev/null
+++ b/lang/gcc9/pkg-plist
@@ -0,0 +1,33 @@
+bin/%%GNU_HOST%%-c++%%SUFFIX%%
+bin/%%GNU_HOST%%-g++%%SUFFIX%%
+bin/%%GNU_HOST%%-gcc%%SUFFIX%%
+bin/%%GNU_HOST%%-gcc-%%GCC_VERSION%%
+bin/%%GNU_HOST%%-gcc-ar%%SUFFIX%%
+bin/%%GNU_HOST%%-gcc-nm%%SUFFIX%%
+bin/%%GNU_HOST%%-gcc-ranlib%%SUFFIX%%
+bin/%%GNU_HOST%%-gfortran%%SUFFIX%%
+bin/c++%%SUFFIX%%
+bin/cpp%%SUFFIX%%
+bin/g++%%SUFFIX%%
+bin/gcc%%SUFFIX%%
+bin/gcc-ar%%SUFFIX%%
+bin/gcc-nm%%SUFFIX%%
+bin/gcc-ranlib%%SUFFIX%%
+bin/gcov%%SUFFIX%%
+bin/gcov-dump%%SUFFIX%%
+bin/gcov-tool%%SUFFIX%%
+bin/gfortran%%SUFFIX%%
+man/man1/cpp%%SUFFIX%%.1.gz
+man/man1/g++%%SUFFIX%%.1.gz
+man/man1/gcc%%SUFFIX%%.1.gz
+man/man1/gcov%%SUFFIX%%.1.gz
+man/man1/gcov-dump%%SUFFIX%%.1.gz
+man/man1/gcov-tool%%SUFFIX%%.1.gz
+man/man1/gfortran%%SUFFIX%%.1.gz
+share/gcc-%%GCC_VERSION%%/python/libstdcxx/__init__.py
+share/gcc-%%GCC_VERSION%%/python/libstdcxx/v6/__init__.py
+share/gcc-%%GCC_VERSION%%/python/libstdcxx/v6/printers.py
+share/gcc-%%GCC_VERSION%%/python/libstdcxx/v6/xmethods.py
+@postexec if type ccache-update-links >/dev/null 2>&1; then ccache-update-links -v; fi
+@postunexec if type ccache-update-links >/dev/null 2>&1; then ccache-update-links -v; fi
+@comment Insert PLIST.lib here