1 files changed, 72 insertions, 0 deletions
diff --git a/src/ci/scripts/install-mingw.sh b/src/ci/scripts/install-mingw.sh
new file mode 100755
index 000000000..1685fbbbb
--- /dev/null
+++ b/src/ci/scripts/install-mingw.sh
@@ -0,0 +1,72 @@
+#!/bin/bash
+# If we need to download a custom MinGW, do so here and set the path
+# appropriately.
+#
+# Here we also do a pretty heinous thing which is to mangle the MinGW
+# installation we just downloaded. Currently, as of this writing, we're using
+# MinGW-w64 builds of gcc, and that's currently at 6.3.0. We use 6.3.0 as it
+# appears to be the first version which contains a fix for #40546, builds
+# randomly failing during LLVM due to ar.exe/ranlib.exe failures.
+#
+# Unfortunately, though, 6.3.0 *also* is the first version of MinGW-w64 builds
+# to contain a regression in gdb (#40184). As a result if we were to use the
+# gdb provided (7.11.1) then we would fail all debuginfo tests.
+#
+# In order to fix spurious failures (pretty high priority) we use 6.3.0. To
+# avoid disabling gdb tests we download an *old* version of gdb, specifically
+# that found inside the 6.2.0 distribution. We then overwrite the 6.3.0 gdb
+# with the 6.2.0 gdb to get tests passing.
+#
+# Note that we don't literally overwrite the gdb.exe binary because it appears
+# to just use gdborig.exe, so that's the binary we deal with instead.
+#
+# Otherwise install MinGW through `pacman`
+
+set -euo pipefail
+IFS=$'\n\t'
+
+source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
+
+MINGW_ARCHIVE_32="i686-6.3.0-release-posix-dwarf-rt_v5-rev2.7z"
+MINGW_ARCHIVE_64="x86_64-6.3.0-release-posix-seh-rt_v5-rev2.7z"
+
+if isWindows; then
+    case "${CI_JOB_NAME}" in
+        *i686*)
+            bits=32
+            arch=i686
+            mingw_archive="${MINGW_ARCHIVE_32}"
+            ;;
+        *x86_64*)
+            bits=64
+            arch=x86_64
+            mingw_archive="${MINGW_ARCHIVE_64}"
+            ;;
+        *aarch64*)
+            # aarch64 is a cross-compiled target. Use the x86_64
+            # mingw, since that's the host architecture.
+            bits=64
+            arch=x86_64
+            mingw_archive="${MINGW_ARCHIVE_64}"
+            ;;
+        *)
+            echo "src/ci/scripts/install-mingw.sh can't detect the builder's architecture"
+            echo "please tweak it to recognize the builder named '${CI_JOB_NAME}'"
+            exit 1
+            ;;
+    esac
+
+    if [[ "${CUSTOM_MINGW-0}" -ne 1 ]]; then
+        pacman -S --noconfirm --needed mingw-w64-$arch-toolchain mingw-w64-$arch-cmake \
+            mingw-w64-$arch-gcc \
+            mingw-w64-$arch-python # the python package is actually for python3
+        ciCommandAddPath "$(ciCheckoutPath)/msys2/mingw${bits}/bin"
+    else
+        mingw_dir="mingw${bits}"
+
+        curl -o mingw.7z "${MIRRORS_BASE}/${mingw_archive}"
+        7z x -y mingw.7z > /dev/null
+        curl -o "${mingw_dir}/bin/gdborig.exe" "${MIRRORS_BASE}/2017-04-20-${bits}bit-gdborig.exe"
+        ciCommandAddPath "$(pwd)/${mingw_dir}/bin"
+    fi
+fi