1 files changed, 70 insertions, 0 deletions
diff --git a/debian/helpers/goenv.sh b/debian/helpers/goenv.sh
new file mode 100755
index 0000000..172df51
--- /dev/null
+++ b/debian/helpers/goenv.sh
@@ -0,0 +1,70 @@
+#!/bin/sh
+set -e
+
+__goos__deb_arch_os() {
+	case "$1" in
+		kfreebsd) echo freebsd ;;
+		linux) echo "$1" ;;
+		*) echo >&2 "error: unrecongized DEB_*_ARCH_OS: $1"; exit 1 ;;
+	esac
+}
+
+__goarch__deb_arch_cpu() {
+	case "$1" in
+		amd64|arm|arm64|mips|ppc64|riscv64|s390x) echo "$1" ;;
+		i386) echo 386 ;;
+		mips64el) echo mips64le ;;
+		mipsel) echo mipsle ;;
+		ppc64el) echo ppc64le ;;
+		*) echo >&2 "error: unrecongized DEB_*_ARCH_CPU: $1"; exit 1 ;;
+	esac
+}
+
+#       build machine
+#           The machine the package is built on.
+#
+#       host machine
+#           The machine the package is built for.
+
+export GOHOSTOS="$(__goos__deb_arch_os "$(dpkg-architecture -qDEB_BUILD_ARCH_OS 2>/dev/null)")"
+export GOOS="$(__goos__deb_arch_os "$(dpkg-architecture -qDEB_HOST_ARCH_OS 2>/dev/null)")"
+
+export GOHOSTARCH="$(__goarch__deb_arch_cpu "$(dpkg-architecture -qDEB_BUILD_ARCH_CPU 2>/dev/null)")"
+export GOARCH="$(__goarch__deb_arch_cpu "$(dpkg-architecture -qDEB_HOST_ARCH_CPU 2>/dev/null)")"
+
+if [ -z "$GOHOSTOS" -o -z "$GOOS" -o -z "$GOHOSTARCH" -o -z "$GOARCH" ]; then
+	exit 1
+fi
+
+[ -e "$GOROOT_BOOTSTRAP/bin/go" ] || exit 1
+GOVERSION_BOOTSTRAP=$("$GOROOT_BOOTSTRAP/bin/go" version|sed -E -n 's|.*go([0-9]\.[0-9]+).*|\1|p')
+export GOVERSION_BOOTSTRAP
+
+# Always not use sse2. This is important to ensure that the binaries we build
+# (both when compiling golang on the buildds and when users cross-compile for
+# 386) can actually run on older CPUs (where old means e.g. an AMD Athlon XP
+# 2400+). See http://bugs.debian.org/753160 and
+# https://code.google.com/p/go/issues/detail?id=8152
+
+# Staring from go1.16, GO386=387 is not supported, only GO386=softfloat.
+unset GO386
+if dpkg --compare-versions "$GOVERSION_BOOTSTRAP" ge "1.16"; then
+	# Only go1.16 recognizes GO386=softfloat. Using GO386=387 to build go1.16
+	# also fails.
+	# https://github.com/golang/go/issues/44500
+	# Need to build with GO386="" first, then rebuild go1.16+ with go1.16 and
+	# GO386=softfloat
+	export GO386=softfloat
+fi
+
+unset GOARM
+if [ "$GOARCH" = 'arm' ]; then
+	# start with GOARM=5 for maximum compatibility (see note about GO386 above)
+	GOARM=5
+	case "$(dpkg-architecture -qDEB_HOST_ARCH 2>/dev/null)" in
+		armhf) GOARM=6 ;;
+	esac
+fi
+export GOARM
+
+eval "$@"