Add XML support to GDB via Expat

This is not documented as thoroughly as it should be, but XML support is
necessary for debugging across DLL boundaries, including even stepping
over DLL functions without getting lost. This is a significant upgrade
to GDB.

Author: skeeto

Dockerfile

@@ -5,6 +5,7 @@ ARG PREFIX=/w64devkit
 ARG BINUTILS_VERSION=2.38
 ARG BUSYBOX_VERSION=FRP-4621-gf3c5e8bc3
 ARG CTAGS_VERSION=20200824
+ARG EXPAT_VERSION=2.4.8
 ARG GCC_VERSION=12.1.0
 ARG GDB_VERSION=10.2
 ARG GMP_VERSION=6.2.1
@@ -24,6 +25,7 @@ RUN curl --insecure --location --remote-name-all \
     https://ftp.gnu.org/gnu/binutils/binutils-$BINUTILS_VERSION.tar.xz \
     https://ftp.gnu.org/gnu/gcc/gcc-$GCC_VERSION/gcc-$GCC_VERSION.tar.xz \
     https://ftp.gnu.org/gnu/gdb/gdb-$GDB_VERSION.tar.xz \
+    https://fossies.org/linux/www/expat-$EXPAT_VERSION.tar.xz \
     https://ftp.gnu.org/gnu/gmp/gmp-$GMP_VERSION.tar.xz \
     https://ftp.gnu.org/gnu/mpc/mpc-$MPC_VERSION.tar.gz \
     https://ftp.gnu.org/gnu/mpfr/mpfr-$MPFR_VERSION.tar.xz \
@@ -40,6 +42,7 @@ RUN sha256sum -c $PREFIX/src/SHA256SUMS \
  && tar xzf universal-ctags_0+git$CTAGS_VERSION.orig.tar.gz \
  && tar xJf gcc-$GCC_VERSION.tar.xz \
  && tar xJf gdb-$GDB_VERSION.tar.xz \
+ && tar xJf expat-$EXPAT_VERSION.tar.xz \
  && tar xJf gmp-$GMP_VERSION.tar.xz \
  && tar xzf mpc-$MPC_VERSION.tar.gz \
  && tar xJf mpfr-$MPFR_VERSION.tar.xz \
@@ -289,9 +292,23 @@ RUN /mingw-w64-v$MINGW_VERSION/mingw-w64-tools/gendef/configure \
  && make -j$(nproc) \
  && cp gendef.exe $PREFIX/bin/
 
+WORKDIR /expat
+RUN /expat-$EXPAT_VERSION/configure \
+        --prefix=/deps \
+        --host=$ARCH \
+        --disable-shared \
+        --without-docbook \
+        --without-examples \
+        --without-tests \
+        CFLAGS="-Os" \
+        LDFLAGS="-s" \
+ && make -j$(nproc) \
+ && make install
+
 WORKDIR /gdb
 RUN /gdb-$GDB_VERSION/configure \
         --host=$ARCH \
+        --with-libexpat-prefix=/deps \
         CFLAGS="-Os -D_WIN32_WINNT=0x502" \
         CXXFLAGS="-Os" \
         LDFLAGS="-s" \

src/SHA256SUMS

@@ -1,5 +1,6 @@
 e316477a914f567eccc34d5d29785b8b0f5a10208d36bbacedcc39048ecfe024  binutils-2.38.tar.xz
 f4d79c1e8a4bc598cba6ac3c6396004154fdf3131a24ac9d3f1bbd48cd995fa2  busybox-w32-FRP-4621-gf3c5e8bc3.tgz
+f79b8f904b749e3e0d20afeadecf8249c55b2e32d4ebb089ae378df479dcaf25  expat-2.4.8.tar.xz
 62fd634889f31c02b64af2c468f064b47ad1ca78411c45abe6ac4b5f8dd19c7b  gcc-12.1.0.tar.xz
 aaa1223d534c9b700a8bec952d9748ee1977513f178727e1bee520ee000b4f29  gdb-10.2.tar.xz
 fd4829912cddd12f84181c3451cc752be224643e87fac497b69edddadc49b4f2  gmp-6.2.1.tar.xz