gcc 16

Dockerfile

@@ -18,8 +18,8 @@ COPY src/w64devkit.ico src/alias.c $PREFIX/src/
 FROM base AS dl-cross
 ARG BINUTILS_VERSION=2.46.0 \
     BINUTILS_SHA256=d75a94f4d73e7a4086f7513e67e439e8fcdcbb726ffe63f4661744e6256b2cf2 \
-    GCC_VERSION=15.2.0 \
-    GCC_SHA256=438fd996826b0c82485a29da03a72d71d6e3541a83ec702df4271f6fe025d24e \
+    GCC_VERSION=16.1.0 \
+    GCC_SHA256=50efb4d94c3397aff3b0d61a5abd748b4dd31d9d3f2ab7be05b171d36a510f79 \
     GMP_VERSION=6.3.0 \
     GMP_SHA256=a3c2b80201b89e68616f4ad30bc66aee4927c3ce50e33929ca819d5c43538898 \
     MINGW_VERSION=14.0.0 \
@@ -256,6 +256,7 @@ RUN cat $PREFIX/src/gcc-*.patch | patch -d/dl/gcc -p1 \
         --enable-languages=c,c++,fortran \
         --enable-libgomp \
         --enable-threads=posix \
+        --enable-tls \
         --enable-version-specific-runtime-libs \
         --disable-libstdcxx-verbose \
         --disable-dependency-tracking \
@@ -424,6 +425,7 @@ RUN echo 'BEGIN {print "pecoff"}' \
         --enable-languages=c,c++,fortran \
         --enable-libgomp \
         --enable-threads=posix \
+        --enable-tls \
         --enable-version-specific-runtime-libs \
         --disable-libstdcxx-verbose \
         --disable-dependency-tracking \

src/gcc-dynamic-load-tzdb.patch

@@ -0,0 +1,24 @@
+diff --git a/libstdc++-v3/src/c++20/tzdb.cc b/libstdc++-v3/src/c++20/tzdb.cc
+index d79b61ad673..7c223ac0faa 100644
+--- a/libstdc++-v3/src/c++20/tzdb.cc
++++ b/libstdc++-v3/src/c++20/tzdb.cc
+@@ -1775,6 +1775,19 @@ namespace std::chrono
+     string_view
+     detect_windows_zone() noexcept
+     {
++#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0600
++      static const HMODULE kernel32 = LoadLibraryW(L"kernel32.dll");
++      using GetDynamicTimeZoneInformation_t =
++        DWORD (WINAPI *) (PDYNAMIC_TIME_ZONE_INFORMATION);
++      static auto *const GetDynamicTimeZoneInformation =
++        reinterpret_cast<GetDynamicTimeZoneInformation_t>(
++          GetProcAddress(kernel32, "GetDynamicTimeZoneInformation"));
++      // MSVC's implementation dynamically loads `icu.dll`. It won't
++      // work until Windows 10 v1903. So we simply "fail as expected".
++      if (!GetDynamicTimeZoneInformation)
++        return {};
++#endif
++
+       DYNAMIC_TIME_ZONE_INFORMATION information{};
+       if (GetDynamicTimeZoneInformation(&information) == TIME_ZONE_ID_INVALID)
+ 	return {};

src/gcc-libgfortran-mapview.patch

@@ -0,0 +1,21 @@
+Use MapViewOfFileEx for libgfortran caf_shmem on Windows.
+
+GCC 16 started using MapViewOfFileExNuma here, but mingw-w64 only
+declares that API for newer Windows targets. w64devkit keeps an older
+target, and this code does not need NUMA placement: NUMA_NO_PREFERRED_NODE
+is equivalent to no NUMA preference. MapViewOfFileEx still accepts the
+requested base address and is available on older Windows targets.
+
+--- a/libgfortran/caf/shmem/shared_memory.c
++++ b/libgfortran/caf/shmem/shared_memory.c
+@@ -234,8 +234,8 @@ shared_memory_init (shared_memory_act *mem, size_t size)
+     }
+ #elif defined(WIN32)
+   mem->glbl.base
+-    = (LPTSTR) MapViewOfFileExNuma (mem->shm_fd, FILE_MAP_ALL_ACCESS, 0, 0,
+-				    size, base_ptr, NUMA_NO_PREFERRED_NODE);
++    = (LPTSTR) MapViewOfFileEx (mem->shm_fd, FILE_MAP_ALL_ACCESS, 0, 0,
++				size, base_ptr);
+   if (mem->glbl.base == NULL)
+     {
+       perror ("MapViewOfFile failed");