Crystal: Force using PCRE (legacy) for cross-compilation

PCRE2 support was added in Crystal v1.7.0, and used by default
in Crystal v1.8.0.

As we don't want to have to guess what version of the PCRE was
used on the build host, force the use of the legacy version until
we drop support for older versions of Crystal.

Makefile

@@ -68,25 +68,25 @@ run: invidious
 #  - armhf       (arm-linux-gnueabihf)
 
 invidious-cross-amd64-glibc:
-	crystal build src/invidious.cr $(FLAGS) -Dskip_videojs_download \
+	crystal build src/invidious.cr $(FLAGS) -Duse_pcre -Dskip_videojs_download \
 		--cross-compile --target='x86_64-linux-gnu' -o invidious-amd64-glibc
 
 invidious-cross-amd64-musl:
-	crystal build src/invidious.cr $(FLAGS) -Dskip_videojs_download \
+	crystal build src/invidious.cr $(FLAGS) -Duse_pcre -Dskip_videojs_download \
 		--cross-compile --target='x86_64-linux-musl' -o invidious-amd64-musl
 
 
 invidious-cross-arm64-glibc:
-	crystal build src/invidious.cr $(FLAGS) -Dskip_videojs_download \
+	crystal build src/invidious.cr $(FLAGS) -Duse_pcre -Dskip_videojs_download \
 		--cross-compile --target='aarch64-linux-gnu' -o invidious-arm64-glibc
 
 invidious-cross-arm64-musl:
-	crystal build src/invidious.cr $(FLAGS) -Dskip_videojs_download \
+	crystal build src/invidious.cr $(FLAGS) -Duse_pcre -Dskip_videojs_download \
 		--cross-compile --target='aarch64-linux-musl' -o invidious-arm64-musl
 
 
 invidious-cross-armhf:
-	crystal build src/invidious.cr $(FLAGS) -Dskip_videojs_download \
+	crystal build src/invidious.cr $(FLAGS) -Duse_pcre -Dskip_videojs_download \
 		--cross-compile --target='arm-linux-gnueabihf' -o invidious-armhf
 
 

docker/Dockerfile.arm64-musl-cross

@@ -1,7 +1,7 @@
 FROM alpine:3.18 AS builder
 
 RUN apk add --no-cache gcc make yaml-static libxml2-static sqlite-static zlib-static \
-    xz-static openssl-libs-static openssl-dev pcre-dev gc-dev libevent-static musl-dev
+    xz-static openssl-libs-static openssl-dev pcre-dev pcre2-dev gc-dev libevent-static musl-dev
 
 ARG release