add args to builder

Dockerfile.linux

@@ -2,7 +2,7 @@
 # Stage 1: Downloader
 FROM ubuntu:16.04@sha256:1f1a2d56de1d604801a9671f301190704c25d604a416f59e03c04f5c6ffee0d6 as downloader
 
-ARG THREADS=1
+ARG THREADS=3
 ARG QT_VERSION=v5.15.14-lts-lgpl
 
 ENV CFLAGS="-fPIC"
@@ -21,7 +21,7 @@ RUN /bin/bash -c "source shared_functions.sh && get_debs_downloader && download_
 # Stage 2: Git Cloner
 FROM ubuntu:16.04@sha256:1f1a2d56de1d604801a9671f301190704c25d604a416f59e03c04f5c6ffee0d6 as gitcloner
 
-ARG THREADS=1
+ARG THREADS=3
 ARG QT_VERSION=v5.15.14-lts-lgpl
 
 ENV CFLAGS="-fPIC"
@@ -40,6 +40,13 @@ RUN /bin/bash -c "source shared_functions.sh && clone_git_repos"
 # Stage 3: Builder
 FROM ubuntu:16.04@sha256:1f1a2d56de1d604801a9671f301190704c25d604a416f59e03c04f5c6ffee0d6 as builder
 
+ARG THREADS=3
+ARG QT_VERSION=v5.15.14-lts-lgpl
+
+ENV CFLAGS="-fPIC"
+ENV CPPFLAGS="-fPIC"
+ENV CXXFLAGS="-fPIC"
+
 WORKDIR /sources
 
 # Copy sources from downloader and gitcloner stages