From 466d7292b205f0d3d2b3eae10a913d97065c920e Mon Sep 17 00:00:00 2001
From: DimitrisJim <d.f.hilliard@gmail.com>
Date: Tue, 11 Jul 2023 23:44:24 +0300
Subject: [PATCH] Use alpine for building simd in docker. Link statically.

---
 Dockerfile | 23 +++++++++++++++--------
 Makefile   |  5 ++++-
 2 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 087d001ee9e..b02982ea017 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,18 +1,22 @@
-FROM golang:1.20 as builder
-
+FROM golang:1.20-alpine3.18 as builder
 ARG IBC_GO_VERSION
 
+RUN set -eux; apk add --no-cache git libusb-dev linux-headers gcc musl-dev make;
+
 ENV GOPATH=""
 ENV GOMODULE="on"
 
 # ensure the ibc go version is being specified for this image.
 RUN test -n "${IBC_GO_VERSION}"
 
-COPY go.mod .
-COPY go.sum .
-
-RUN go mod download
+# Grab the static library and copy it to location that will be found by the linker flag `-lwasmvm_muslc`.
+# TODO: nice to have: a script to download version matching the wasmvm version in go.mod.
+ADD https://github.com/CosmWasm/wasmvm/releases/download/v1.2.1/libwasmvm_muslc.x86_64.a /lib/libwasmvm_muslc.x86_64.a
+RUN sha256sum /lib/libwasmvm_muslc.x86_64.a | grep a00700aa19f5bfe0f46290ddf69bf51eb03a6dfcd88b905e1081af2e42dbbafc
+RUN cp /lib/libwasmvm_muslc.x86_64.a /lib/libwasmvm_muslc.a
 
+# Copy relevant files before go mod download. Replace directives to local paths break if local
+# files are not copied before go mod download.
 ADD internal internal
 ADD testing testing
 ADD modules modules
@@ -21,11 +25,14 @@ ADD LICENSE LICENSE
 COPY contrib/devtools/Makefile contrib/devtools/Makefile
 COPY Makefile .
 
+COPY go.mod .
+COPY go.sum .
 
-RUN make build
+RUN go mod download
 
-FROM ubuntu:22.04
+RUN BUILD_TAGS=muslc LINK_STATICALLY=true make build
 
+FROM alpine:3.18
 ARG IBC_GO_VERSION
 
 LABEL "org.cosmos.ibc-go" "${IBC_GO_VERSION}"
diff --git a/Makefile b/Makefile
index 3bc5487abd6..479d085bc04 100644
--- a/Makefile
+++ b/Makefile
@@ -84,9 +84,12 @@ endif
 ifeq (,$(findstring nostrip,$(COSMOS_BUILD_OPTIONS)))
   ldflags += -w -s
 endif
+# Direct linker to statically link.
+ifeq ($(LINK_STATICALLY),true)
+	ldflags += -linkmode=external -extldflags "-Wl,-z,muldefs -static"
+endif
 ldflags += $(LDFLAGS)
 ldflags := $(strip $(ldflags))
-
 BUILD_FLAGS := -tags "$(build_tags)" -ldflags '$(ldflags)'
 # check for nostrip option
 ifeq (,$(findstring nostrip,$(COSMOS_BUILD_OPTIONS)))