Fix alpine armv7 build

Reference: rust-cross/rust-musl-cross#34
dani-garcia · Mar 23, 2021 · 6016418 · 6016418
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commit 6016418
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diff --git a/docker/Dockerfile.j2 b/docker/Dockerfile.j2
@@ -93,6 +93,9 @@ RUN rustup set profile minimal
 {% if "alpine" in target_file %}
 ENV USER "root"
 ENV RUSTFLAGS='-C link-arg=-s'
+{%   if "armv7" in target_file %}
+ENV CFLAGS_armv7_unknown_linux_musleabihf="-mfpu=vfpv3-d16"
+{%   endif %}
 {% elif "arm" in target_file %}
 # Install required build libs for {{ package_arch_name }} architecture.
 # To compile both mysql and postgresql we need some extra packages for both host arch and target arch

diff --git a/docker/armv7/Dockerfile.alpine b/docker/armv7/Dockerfile.alpine
@@ -38,6 +38,7 @@ RUN rustup set profile minimal
 
 ENV USER "root"
 ENV RUSTFLAGS='-C link-arg=-s'
+ENV CFLAGS_armv7_unknown_linux_musleabihf="-mfpu=vfpv3-d16"
 
 # Creates a dummy project used to grab dependencies
 RUN USER=root cargo new --bin /app