gcc: update to 14

GCC14 libstdc++ has implemented C++11 thread support for win32 thread model, so switch to the win32 thread model

do not hardcode march and mtune as they have been switched to wrapper

close shinchiro#395

toolchain/gcc/gcc-compiler.in

@@ -1,9 +1,11 @@
 #!/bin/bash
 PROG=@CMAKE_INSTALL_PREFIX@/bin/cross-@compiler@
+FLAGS="-march=@GCC_ARCH@ -mtune=@M_TUNE@"
 FLAGS="$FLAGS @opt@"
+FLAGS="$FLAGS -D_WIN32_WINNT=0x0A00 -DWINVER=0x0A00"
 
 if [ "$CONF" == "1" ]; then
-    SKIP_OPT="-g0 -O0 -fno-lto -fno-data-sections -fno-function-sections"
+    SKIP_OPT="-g0 -O1 -fno-lto -fno-data-sections -fno-function-sections"
 else
     if [ "@ENABLE_CCACHE@" == "ON" ]; then
         CCACHE="ccache"

toolchain/gcc/gcc.cmake

@@ -1,10 +1,12 @@
 ExternalProject_Add(gcc
     DEPENDS
         mingw-w64-headers
-    URL https://mirrorservice.org/sites/sourceware.org/pub/gcc/snapshots/13-20231111/gcc-13-20231111.tar.xz
-    # https://mirrorservice.org/sites/sourceware.org/pub/gcc/snapshots/12-20221217/sha512.sum
-    URL_HASH SHA512=6f62981040894fdc98fff57295608092b917fe909cd67477c9ffc81197e5780ebabe1fbb4113e792ea441e0adb79fec5f802cda807632945c36ea295d623f19f
-    DOWNLOAD_DIR ${SOURCE_LOCATION}
+    GIT_REPOSITORY https://github.com/gcc-mirror/gcc.git
+    SOURCE_DIR ${SOURCE_LOCATION}
+    GIT_CLONE_FLAGS "--filter=tree:0"
+    GIT_TAG master
+    GIT_REMOTE_NAME origin
+    UPDATE_COMMAND ""
     CONFIGURE_COMMAND <SOURCE_DIR>/configure
         --target=${TARGET_ARCH}
         --prefix=${CMAKE_INSTALL_PREFIX}
@@ -16,13 +18,16 @@ ExternalProject_Add(gcc
         --disable-nls
         --disable-shared
         --disable-win32-registry
-        --with-arch=${GCC_ARCH}
-        --with-tune=generic
-        --enable-threads=posix
+        --enable-threads=win32
+        --enable-libstdcxx-threads=yes
         --without-included-gettext
         --enable-lto
-        --enable-checking=release
+        --disable-checking
+        --disable-libgomp
         --disable-sjlj-exceptions
+        --enable-default-pie
+        --enable-host-pie
+        --enable-host-bind-now
     BUILD_COMMAND make -j${MAKEJOBS} all-gcc
     INSTALL_COMMAND make install-strip-gcc
     STEP_TARGETS download install