Update build images to LLVM 15 (crystal-lang#231)

Author: straight-shoota

docker/Makefile

@@ -18,7 +18,7 @@ GC_VERSION = v8.2.0
 
 OUTPUT_DIR := build
 BUILD_CONTEXT := $(CURDIR)/build-context
-BUILD_ARGS_UBUNTU64 := --build-arg crystal_targz=crystal.tar.gz $(BUILD_CONTEXT)/ubuntu64 --build-arg base_docker_image=ubuntu:focal
+BUILD_ARGS_UBUNTU64 := --build-arg crystal_targz=crystal.tar.gz $(BUILD_CONTEXT)/ubuntu64
 BUILD_ARGS_ALPINE := --build-arg crystal_targz=crystal.tar.gz $(BUILD_CONTEXT)/alpine --build-arg gc_version=$(GC_VERSION)
 DOCKER_TAG_UBUNTU := $(DOCKER_REPOSITORY):$(DOCKER_TAG)
 DOCKER_TAG_ALPINE := $(DOCKER_REPOSITORY):$(DOCKER_TAG)-alpine

docker/alpine.Dockerfile

@@ -1,4 +1,5 @@
-FROM alpine:3.16 as runtime
+ARG base_docker_image=alpine:3.17
+FROM ${base_docker_image} as runtime
 
 RUN \
   apk add --update --no-cache --force-overwrite \
@@ -42,6 +43,6 @@ FROM runtime as build
 
 RUN \
   apk add --update --no-cache --force-overwrite \
-    llvm13-dev llvm13-static g++ libffi-dev
+    llvm15-dev llvm15-static g++ libffi-dev
 
 CMD ["/bin/sh"]

docker/ubuntu.Dockerfile

@@ -1,4 +1,4 @@
-ARG base_docker_image
+ARG base_docker_image=ubuntu:22.04
 FROM ${base_docker_image} as runtime
 
 RUN \
@@ -23,9 +23,9 @@ FROM runtime as build
 
 RUN \
   apt-get update && \
-  apt-get install -y build-essential llvm-10 lld-10 libedit-dev gdb libffi-dev && \
+  apt-get install -y build-essential llvm-15 lld-15 libedit-dev gdb libffi-dev && \
   apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
-RUN ln -sf /usr/bin/ld.lld-10 /usr/bin/ld.lld
+RUN ln -sf /usr/bin/ld.lld-15 /usr/bin/ld.lld
 
 CMD ["/bin/sh"]