Fix PKG_CONFIG [skip ci]

Author: Claudio Raimondi

Dockerfile

@@ -73,16 +73,13 @@ RUN apt-get update && \
         python3-dev \
         autoconf \
         automake \
-        libicu-dev \
         pkg-config \
         bison \
         flex \
         jq \
         libtool \
         gettext \
-        protobuf-compiler \
-        qemu-user-static \
-        binfmt-support
+        protobuf-compiler
 
 WORKDIR /opt
 
@@ -126,6 +123,7 @@ RUN dpkg --add-architecture ${target_arch_dpkg}
 
 RUN apt-get update && \
     apt-get install -qq -y --no-install-recommends \
+        libicu-dev:${target_arch_dpkg} \
         zlib1g-dev:${target_arch_dpkg} \
         libsqlite3-dev:${target_arch_dpkg} \
         libpq-dev:${target_arch_dpkg} \
@@ -140,8 +138,16 @@ ARG CXX=${target_arch}-g++
 ARG LD=${target_arch}-ld
 ARG STRIP=${target_arch}-strip
 ARG TARGET=${target_arch_rust}
+ARG PKG_CONFIG_PATH=/usr/lib/${target_arch}/pkgconfig
 ARG COPTFLAGS="-O2 ${COPTFLAGS}"
 
+#TODO: find a way to set these in ENV isntead of writing into config.toml
+RUN mkdir -p .cargo && tee .cargo/config.toml <<EOF
+[target.${target_arch_rust}]
+linker = "${target_arch}-gcc"
+rustflags = ["-C", "target-cpu=generic"]
+EOF
+
 WORKDIR /opt
 
 RUN ./install-uv.sh -q
@@ -151,13 +157,6 @@ ENV PATH="/root/.cargo/bin:/root/.local/bin:${PATH}"
 
 WORKDIR /opt/lightningd
 
-#TODO: set these in env instead of file?
-RUN mkdir -p .cargo && tee .cargo/config.toml <<EOF
-[target.${target_arch_rust}]
-linker = "${target_arch}-gcc"
-rustflags = ["-C", "target-cpu=generic"]
-EOF
-
 #TODO: Fix unaligned access on armv7
 RUN ./configure --prefix=/tmp/lightning_install --enable-static --disable-compat --disable-valgrind
 COPY .git/ .git/