ci: extract installing mingw into a script

1 files changed, 44 insertions, 0 deletions

diff --git a/src/ci/scripts/install-mingw.sh b/src/ci/scripts/install-mingw.sh
new file mode 100755
index 00000000000..cf3e3e7ec25
--- /dev/null
+++ b/src/ci/scripts/install-mingw.sh
@@ -0,0 +1,44 @@
+#!/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 "$0")" && pwd)/../shared.sh"
+
+if isWindows; then
+    if [[ -z "${MINGW_URL+x}" ]]; then
+        curl -o mingw.7z "${MINGW_URL}/${MINGW_ARCHIVE}"
+        7z x -y mingw.7z > /dev/null
+        curl -o "${MINGW_DIR}/bin/gdborig.exe" "${MINGW_URL}/2017-04-20-${MSYS_BITS}bit-gdborig.exe"
+        ciCommandAddPath "$(pwd)/${MINGW_DIR}/bin"
+    else
+        arch=i686
+        if [ "$MSYS_BITS" = "64" ]; then
+          arch=x86_64
+        fi
+        pacman -S --noconfirm --needed mingw-w64-$arch-toolchain mingw-w64-$arch-cmake mingw-w64-$arch-gcc mingw-w64-$arch-python2
+        ciCommandAddPath "${SYSTEM_WORKFOLDER}/msys2/mingw${MSYS_BITS}/bin"
+    fi
+fi