16 files changed, 577 insertions, 0 deletions
diff --git a/lang/gcc15/Makefile b/lang/gcc15/Makefile
new file mode 100644
index 000000000000..c9444e5e22e8
--- /dev/null
+++ b/lang/gcc15/Makefile
@@ -0,0 +1,189 @@
+PORTNAME=	gcc
+PORTVERSION=	15.1.0
+CATEGORIES=	lang
+MASTER_SITES=	GCC
+PKGNAMESUFFIX=	${SUFFIX}
+
+MAINTAINER=	salvadore@FreeBSD.org
+COMMENT=	GNU Compiler Collection 15
+WWW=		https://gcc.gnu.org
+
+LICENSE=	GPLv3 GPLv3RLE
+LICENSE_COMB=	multi
+
+ONLY_FOR_ARCHS=	aarch64 amd64 armv6 armv7 i386 powerpc powerpc64 powerpc64le
+
+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:c++11-lang cpe gmake iconv libtool makeinfo perl5 tar:xz
+USE_BINUTILS=	yes
+USE_PERL5=	build
+
+CONFLICTS=	gcc15-devel
+
+CPE_VENDOR=	gnu
+CPE_VERSION=	${GCC_VERSION}
+
+GCC_VERSION=	${PORTVERSION}
+SUFFIX=		${PORTVERSION:C/([0-9]+).*/\1/}
+CFLAGS:=	${CFLAGS:N-mretpoline} -D__USE_ISOC11
+CXXFLAGS:=	${CXXFLAGS:N-mretpoline}
+
+OPTIONS_DEFINE=		GRAPHITE
+OPTIONS_DEFAULT_aarch64=STANDARD_BOOTSTRAP
+OPTIONS_DEFAULT_armv6=	STANDARD_BOOTSTRAP
+OPTIONS_DEFAULT_armv7=	STANDARD_BOOTSTRAP
+OPTIONS_DEFAULT_amd64=	STANDARD_BOOTSTRAP
+OPTIONS_DEFAULT_i386=	STANDARD_BOOTSTRAP
+OPTIONS_DEFAULT_powerpc=LTO_BOOTSTRAP
+OPTIONS_DEFAULT_powerpc64=LTO_BOOTSTRAP
+OPTIONS_DEFAULT_powerpc64le=LTO_BOOTSTRAP
+OPTIONS_RADIO=	BOOTSTRAP
+OPTIONS_RADIO_BOOTSTRAP=	LTO_BOOTSTRAP STANDARD_BOOTSTRAP
+LTO_BOOTSTRAP_DESC=	Build using a full LTO bootstrap
+STANDARD_BOOTSTRAP_DESC=	Build using a full bootstrap without LTO
+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 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105010
+MULTILIB_DESC=		Build support for 32-bit and 64-bit targets
+MULTILIB_CONFIGURE_ENABLE=	multilib
+.else
+CONFIGURE_ARGS+=	--disable-multilib
+.endif
+
+.if defined(CPUTYPE) && ${CPUTYPE:Mg[3-5]}
+CFLAGS:=	${CFLAGS:S/mcpu=g/mcpu=G/}
+CXXFLAGS:=	${CFLAGS:S/mcpu=g/mcpu=G/}
+.endif
+
+GRAPHITE_LIB_DEPENDS=          libisl.so:devel/isl
+GRAPHITE_CONFIGURE_WITH+=      isl
+
+.include <bsd.port.pre.mk>
+
+.if ${ARCH} == amd64
+CONFIGURE_TARGET=	x86_64-portbld-${OPSYS:tl}${OSREL}
+
+.elif ${ARCH} == powerpc64
+CONFIGURE_ARGS+=	--with-abi=elfv2
+USE_GCC=	yes
+
+.elif ${ARCH} == powerpc64le
+USE_GCC=	yes
+.endif
+
+.if ${ARCH} == i386
+LANGUAGES:=	c,c++,objc,fortran
+.else
+LANGUAGES:=	c,c++,objc,fortran,jit
+.endif
+TARGLIB=	${PREFIX}/lib/gcc${SUFFIX}
+TARGLIB32=	${PREFIX}/lib32	# The version information is added later
+LIBEXEC=	${PREFIX}/libexec/gcc${SUFFIX}
+GNU_CONFIGURE=	yes
+GNU_CONFIGURE_MANPREFIX=${PREFIX}/share
+CONFIGURE_OUTSOURCE=	yes
+.if empty(PORT_OPTIONS:M*BOOTSTRAP)
+CONFIGURE_ARGS+=--disable-bootstrap
+.elif ${PORT_OPTIONS:MLTO_BOOTSTRAP}
+CONFIGURE_ARGS+=--with-build-config=bootstrap-lto-noplugin
+ALL_TARGET=	bootstrap-lean
+PIE_UNSAFE=	yes
+.else
+CONFIGURE_ARGS+=--with-build-config=bootstrap-debug
+ALL_TARGET=	bootstrap-lean
+PIE_UNSAFE=	yes
+.endif
+INSTALL_TARGET=	install-strip
+.if ${UID} != 0
+BINMODE=	755
+.endif
+CONFIGURE_ARGS+=--disable-nls \
+		--disable-libssp \
+		--enable-gnu-indirect-function \
+		--enable-host-shared \
+		--enable-plugin \
+		--libdir=${TARGLIB} \
+		--libexecdir=${LIBEXEC} \
+		--program-suffix=${SUFFIX} \
+		--with-as=${LOCALBASE}/bin/as \
+		--with-gmp=${LOCALBASE} \
+		--with-gxx-include-dir=${TARGLIB}/include/c++/ \
+		--with-gxx-libcxx-include-dir=/usr/include/c++/v1 \
+		--with-ld=${LOCALBASE}/bin/ld \
+		${ICONV_CONFIGURE_ARG} \
+		--with-pkgversion="FreeBSD Ports Collection" \
+		--with-system-zlib \
+		--without-zstd
+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${SUFFIX}/libgccjit \
+		gcc${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=${TARGLIB}
+
+CONFIGURE_ARGS+=--enable-languages=${LANGUAGES}
+
+.if (${ARCH} == amd64 || ${ARCH} == powerpc64) && ${PORT_OPTIONS:MMULTILIB}
+USE_LDCONFIG32=	${TARGLIB32}/gcc${SUFFIX}
+.endif
+
+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}/share/man/man7/*
+	${RM} -r ${STAGEDIR}${TARGLIB}/gcc/*/${GCC_VERSION}/include-fixed/
+	# Install ISO_Fortran_binding.h in an easily findable directory
+	${MKDIR} ${STAGEDIR}${PREFIX}/include/gcc${SUFFIX}
+	${INSTALL_DATA} ${STAGEDIR}${PREFIX}/lib/gcc${SUFFIX}/gcc/${CONFIGURE_TARGET}/${GCC_VERSION}/include/ISO_Fortran_binding.h	\
+		${STAGEDIR}${PREFIX}/include/gcc${SUFFIX}
+	# 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/gcc15/distinfo b/lang/gcc15/distinfo
new file mode 100644
index 000000000000..3b6b15e9e125
--- /dev/null
+++ b/lang/gcc15/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1745940383
+SHA256 (gcc-15.1.0.tar.xz) = e2b09ec21660f01fecffb715e0120265216943f038d0e48a9868713e54f06cea
+SIZE (gcc-15.1.0.tar.xz) = 98268344
diff --git a/lang/gcc15/files/patch-arm-unwind-cxx-support b/lang/gcc15/files/patch-arm-unwind-cxx-support
new file mode 100644
index 000000000000..ec6959b9655c
--- /dev/null
+++ b/lang/gcc15/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/gcc15/files/patch-gcc_Makefile.in b/lang/gcc15/files/patch-gcc_Makefile.in
new file mode 100644
index 000000000000..127c87b1af79
--- /dev/null
+++ b/lang/gcc15/files/patch-gcc_Makefile.in
@@ -0,0 +1,19 @@
+--- gcc/Makefile.in.orig	2024-02-25 22:32:27 UTC
++++ gcc/Makefile.in
+@@ -671,6 +671,8 @@ libsubdir = $(libdir)/gcc/$(real_target_noncanonical)/
+ 
+ # Directory in which the compiler finds libraries etc.
+ libsubdir = $(libdir)/gcc/$(real_target_noncanonical)/$(version)$(accel_dir_suffix)
++# Directory in which the compiler finds headers.
++libsubincludedir = $(libdir)/gcc/$(target_alias)/$(version)/include
+ # Directory in which the compiler finds executables
+ libexecsubdir = $(libexecdir)/gcc/$(real_target_noncanonical)/$(version)$(accel_dir_suffix)
+ # Directory in which all plugin resources are installed
+@@ -3821,6 +3823,7 @@ installdirs:
+ # $(libdir)/gcc/include isn't currently searched by cpp.
+ installdirs:
+ 	$(mkinstalldirs) $(DESTDIR)$(libsubdir)
++	$(mkinstalldirs) $(DESTDIR)$(libsubincludedir)
+ 	$(mkinstalldirs) $(DESTDIR)$(libexecsubdir)
+ 	$(mkinstalldirs) $(DESTDIR)$(bindir)
+ 	$(mkinstalldirs) $(DESTDIR)$(includedir)
diff --git a/lang/gcc15/files/patch-gcc_configure b/lang/gcc15/files/patch-gcc_configure
new file mode 100644
index 000000000000..cc60593ba6f7
--- /dev/null
+++ b/lang/gcc15/files/patch-gcc_configure
@@ -0,0 +1,22 @@
+Enable support for .init_array and .fini_array, which FreeBSD supports
+since commit 83aa9cc00c2d83d05a0efe7a1496d8aab4a153bb in the src
+repository.
+
+There __FreeBSD_version is 1000009, so we start enabling the support
+from __FreeBSD_version == 1000010.
+--- gcc/configure.orig	2023-05-11 22:33:34 UTC
++++ gcc/configure
+@@ -24214,6 +24214,13 @@ EOF
+ #else
+ # if defined __sun__ && defined __svr4__
+    /* Solaris ld.so.1 supports .init_array/.fini_array since Solaris 8.  */
++# elif defined __FreeBSD__
++#  include <sys/param.h>
++#   if __FreeBSD_version >= 1000010
++     /* FreeBSD supports .init_array/.fini_array since FreeBSD 10.  */
++#   else
++#    error The C library not known to support .init_array/.fini_array
++#   endif
+ # else
+ #  error The C library not known to support .init_array/.fini_array
+ # endif
diff --git a/lang/gcc15/files/patch-gcc_jit_Make-lang.in b/lang/gcc15/files/patch-gcc_jit_Make-lang.in
new file mode 100644
index 000000000000..d5fdd6103146
--- /dev/null
+++ b/lang/gcc15/files/patch-gcc_jit_Make-lang.in
@@ -0,0 +1,14 @@
+--- gcc/jit/Make-lang.in.orig	2024-02-25 22:32:31 UTC
++++ gcc/jit/Make-lang.in
+@@ -360,9 +360,9 @@ jit.install-headers: installdirs
+ # Install hooks:
+ jit.install-headers: installdirs
+ 	$(INSTALL_DATA) $(srcdir)/jit/libgccjit.h \
+-	  $(DESTDIR)$(includedir)/libgccjit.h
++	  $(DESTDIR)$(libsubincludedir)/libgccjit.h
+ 	$(INSTALL_DATA) $(srcdir)/jit/libgccjit++.h \
+-	  $(DESTDIR)$(includedir)/libgccjit++.h
++	  $(DESTDIR)$(libsubincludedir)/libgccjit++.h
+ 
+ ifneq (,$(findstring mingw,$(target)))
+ jit.install-common: installdirs jit.install-headers
diff --git a/lang/gcc15/files/patch-gfortran-libgcc b/lang/gcc15/files/patch-gfortran-libgcc
new file mode 100644
index 000000000000..4363c2e11f36
--- /dev/null
+++ b/lang/gcc15/files/patch-gfortran-libgcc
@@ -0,0 +1,69 @@
+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.cc.orig	2022-01-23 22:32:06.000000000 +0000
++++ gcc/fortran/gfortranspec.cc	2022-02-06 08:56:31.018286000 +0000
+@@ -406,7 +406,7 @@
+ 	}
+     }
+ 
+-#ifdef ENABLE_SHARED_LIBGCC
++#if 0
+   if (library)
+     {
+       unsigned int i;
+--- libgfortran/Makefile.in.orig
++++ libgfortran/Makefile.in
+@@ -759,7 +759,7 @@
+ 	$(LTLDFLAGS) $(LIBQUADLIB) ../libbacktrace/libbacktrace.la \
+ 	$(HWCAP_LDFLAGS) \
+	$(LIBM) $(extra_darwin_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/gcc15/files/patch-libcxxrt b/lang/gcc15/files/patch-libcxxrt
new file mode 100644
index 000000000000..4225df7aad1e
--- /dev/null
+++ b/lang/gcc15/files/patch-libcxxrt
@@ -0,0 +1,18 @@
+libc++ on FreeBSD always uses PathScale libcxxrt and cannot change to
+LLVM libc++abi without breaking backward compatibility. Besides, mixing
+different C++ ABIs is not supported unless subset via DT_FILTER.
+
+https://github.com/llvm/llvm-project/commit/35479ffb1251
+https://github.com/freebsd/freebsd-src/commit/cf56074e5271
+
+--- gcc/cp/g++spec.cc.orig	2022-07-31 22:32:16 UTC
++++ gcc/cp/g++spec.cc
+@@ -60,7 +60,7 @@ along with GCC; see the file COPYING3.  If not see
+ #endif
+ 
+ #ifndef LIBCXXABI
+-#define LIBCXXABI "c++abi"
++#define LIBCXXABI "cxxrt"
+ #endif
+ #ifndef LIBCXXABI_PROFILE
+ #define LIBCXXABI_PROFILE LIBCXXABI
diff --git a/lang/gcc15/files/patch-libgcc_enable-execute-stack-mprotect.c b/lang/gcc15/files/patch-libgcc_enable-execute-stack-mprotect.c
new file mode 100644
index 000000000000..4645f084fef0
--- /dev/null
+++ b/lang/gcc15/files/patch-libgcc_enable-execute-stack-mprotect.c
@@ -0,0 +1,15 @@
+--- libgcc/enable-execute-stack-mprotect.c.orig	2024-11-23 12:39:04 UTC
++++ libgcc/enable-execute-stack-mprotect.c
+@@ -30,10 +30,11 @@ static int need_enable_exec_stack;
+ 
+ static int need_enable_exec_stack;
+ 
+-static void check_enabling (void) __attribute__ ((unused));
+ extern void __enable_execute_stack (void *);
+ 
+ #if defined __sun__ && defined __svr4__
++static void check_enabling (void) __attribute__ ((unused));
++
+ static void __attribute__ ((constructor))
+ check_enabling (void)
+ {
diff --git a/lang/gcc15/files/patch-libgcc_unwind.inc b/lang/gcc15/files/patch-libgcc_unwind.inc
new file mode 100644
index 000000000000..94fb7f65d5fb
--- /dev/null
+++ b/lang/gcc15/files/patch-libgcc_unwind.inc
@@ -0,0 +1,31 @@
+GCC generates instructions that require variables to be aligned in memory on
+certain CPUs. Our libthr does not have the required alignment so these CPUs fail
+to execute these instructions. The instructions generation is driven by CPUTYPE.
+Some CPUs are fine to execute these instructions on unaligned data.
+
+This patch explicitly forbids GCC to generate instructions that require
+alignment of the data.
+
+If the entire program is compiled by LLVM or GCC, there is no problem (with GCC
+everything is aligned, with LLVM vmovdqa is not used to assign both variables
+at once).
+
+Linux does not have libthr, so Linux is not affected. Moreover Linux is likely
+to build everything with GCC.
+
+This patch will become obsolete once all supported FreeBSD releases
+include commit 22e564c74eb20e14bd93fd9fdde20e38a29cfcf1.
+
+--- libgcc/unwind.inc.orig	2025-04-12 08:18:17 UTC
++++ libgcc/unwind.inc
+@@ -212,8 +212,8 @@ _Unwind_ForcedUnwind (struct _Unwind_Exception *exc,
+   uw_init_context (&this_context);
+   cur_context = this_context;
+ 
+-  exc->private_1 = (_Unwind_Ptr) stop;
+-  exc->private_2 = (_Unwind_Ptr) stop_argument;
++  __builtin_memcpy(&exc->private_1, &stop, sizeof(_Unwind_Ptr));
++  __builtin_memcpy(&exc->private_2, &stop_argument, sizeof(_Unwind_Ptr));
+ 
+   code = _Unwind_ForcedUnwind_Phase2 (exc, &cur_context, &frames);
+   if (code != _URC_INSTALL_CONTEXT)
diff --git a/lang/gcc15/files/patch-libsanitizer_asan_asan__linux.cpp b/lang/gcc15/files/patch-libsanitizer_asan_asan__linux.cpp
new file mode 100644
index 000000000000..f6c16d8730ee
--- /dev/null
+++ b/lang/gcc15/files/patch-libsanitizer_asan_asan__linux.cpp
@@ -0,0 +1,23 @@
+Since the vDSO shared librares on Linux and FreeBSD are called
+differently, the initialization order check fails on FreeBSD.
+This patch fixes it by ignoring [vdso] instead of linux-vdso.so.
+
+GCC gets the original file from the LLVM Project, so this patch should
+probably be upstreamed directly to the LLVM Project rather than to GCC.
+
+
+--- libsanitizer/asan/asan_linux.cpp.orig	2022-11-23 11:22:41 UTC
++++ libsanitizer/asan/asan_linux.cpp
+@@ -148,6 +148,12 @@ static int FindFirstDSOCallback(struct dl_phdr_info *i
+     return 0;
+ #    endif
+ 
++#    if SANITIZER_FREEBSD
++  // Ignore vDSO
++  if (internal_strncmp(info->dlpi_name, "[vdso]", sizeof("[vdso]") - 1) == 0)
++    return 0;
++#    endif
++
+   *name = info->dlpi_name;
+   return 1;
+ }
diff --git a/lang/gcc15/files/patch-libsanitizer_asan_asan__thread.cpp b/lang/gcc15/files/patch-libsanitizer_asan_asan__thread.cpp
new file mode 100644
index 000000000000..61c0ccf1cd89
--- /dev/null
+++ b/lang/gcc15/files/patch-libsanitizer_asan_asan__thread.cpp
@@ -0,0 +1,13 @@
+--- libsanitizer/asan/asan_thread.cpp.orig	2024-01-12 13:45:52 UTC
++++ libsanitizer/asan/asan_thread.cpp
+@@ -323,7 +323,9 @@ void AsanThread::ClearShadowForThreadStackAndTLS() {
+   if (tls_begin_ != tls_end_) {
+     uptr tls_begin_aligned = RoundDownTo(tls_begin_, ASAN_SHADOW_GRANULARITY);
+     uptr tls_end_aligned = RoundUpTo(tls_end_, ASAN_SHADOW_GRANULARITY);
+-    FastPoisonShadow(tls_begin_aligned, tls_end_aligned - tls_begin_aligned, 0);
++    FastPoisonShadowPartialRightRedzone(tls_begin_aligned,
++				tls_end_ - tls_begin_aligned,
++				tls_end_aligned - tls_end_, 0);
+   }
+ }
+ 
diff --git a/lang/gcc15/files/pkg-message.in b/lang/gcc15/files/pkg-message.in
new file mode 100644
index 000000000000..df3ea725ce59
--- /dev/null
+++ b/lang/gcc15/files/pkg-message.in
@@ -0,0 +1,13 @@
+[
+{ type: install
+  message: <<EOD
+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.
+EOD
+}
+]
diff --git a/lang/gcc15/pkg-descr b/lang/gcc15/pkg-descr
new file mode 100644
index 000000000000..656284b17cdd
--- /dev/null
+++ b/lang/gcc15/pkg-descr
@@ -0,0 +1,3 @@
+GCC, the GNU Compiler Collection, supports a number of languages.
+This port installs the C, C++, and Fortran front ends as gcc15, g++15,
+and gfortran15, respectively.
diff --git a/lang/gcc15/pkg-help b/lang/gcc15/pkg-help
new file mode 100644
index 000000000000..9030bbb28d3f
--- /dev/null
+++ b/lang/gcc15/pkg-help
@@ -0,0 +1,3 @@
+Building this port with LTO_BOOTSTRAP enabled requires significant amounts of
+memory and time. Consider disabling LTO_BOOTSTRAP in favor of STANDARD_BOOTSTRAP
+(or disabling BOOTSTRAP altogether) in case that is a problem.
diff --git a/lang/gcc15/pkg-plist b/lang/gcc15/pkg-plist
new file mode 100644
index 000000000000..8dcc98c6dd52
--- /dev/null
+++ b/lang/gcc15/pkg-plist
@@ -0,0 +1,36 @@
+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%%
+bin/lto-dump%%SUFFIX%%
+include/gcc%%SUFFIX%%/ISO_Fortran_binding.h
+share/man/man1/cpp%%SUFFIX%%.1.gz
+share/man/man1/g++%%SUFFIX%%.1.gz
+share/man/man1/gcc%%SUFFIX%%.1.gz
+share/man/man1/gcov%%SUFFIX%%.1.gz
+share/man/man1/gcov-dump%%SUFFIX%%.1.gz
+share/man/man1/gcov-tool%%SUFFIX%%.1.gz
+share/man/man1/gfortran%%SUFFIX%%.1.gz
+share/man/man1/lto-dump%%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