C++ and .Net core not building in single Dockerfile - docker

Question

I have following dockerfile. It is compiling c++ as well as .net projects.
When I add .net code C++ layers are not working. If I remove .Net Layers then C++ Layers are working.
Is this something can't be done in single file?
# GCC support can be specified at major, minor, or micro version
# (e.g. 8, 8.2 or 8.2.0).
# See https://hub.docker.com/r/library/gcc/ for all supported GCC
# tags from Docker Hub.
# See https://docs.docker.com/samples/library/gcc/ for more on how to use this image
FROM gcc:latest
RUN apt-get update
RUN apt-get install -y libmotif-dev
# These commands copy your files into the specified directory in the image
# and set that as the working location
COPY . /usr/src/myapp
COPY ca-8-5-5-linux-x86-64/redist /usr/src/myapp/ca-8-5-5-linux-x86-64/sdk/demo
WORKDIR /usr/src/myapp/ca-8-5-5-linux-x86-64/sdk/samplecode/unix/
# This command compiles your app using GCC, adjust for your source code
RUN make
###############################################################################################
NEED HELP HERE. ABOVE IS NOT WORKING. IF I REMOVE FOLLOWING THEN ABOVE WORKS.
###############################################################################################
FROM mcr.microsoft.com/dotnet/runtime:6.0-focal AS base
WORKDIR /app
# Creates a non-root user with an explicit UID and adds permission to access the /app folder
# For more info, please refer to https://aka.ms/vscode-docker-dotnet-configure-containers
RUN adduser -u 5678 --disabled-password --gecos "" appuser && chown -R appuser /app
USER appuser
COPY . .
FROM mcr.microsoft.com/dotnet/sdk:6.0-focal AS build
WORKDIR /src
COPY ["sdk/samplecode/myAppExport/myAppExport.csproj", "./"]
RUN dotnet restore "myAppExport.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "sdk/samplecode/myAppExport/myAppExport.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "sdk/samplecode/myAppExport/myAppExport.csproj" -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "myAppExport.dll"]
Following is the log I am having when both "Make" and dotnet build is together.
[+] Building 19.4s (20/20) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 1.70kB 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 35B 0.0s
=> [internal] load metadata for mcr.microsoft.com/dotnet/sdk:6.0-focal 0.5s
=> [internal] load metadata for mcr.microsoft.com/dotnet/runtime:6.0-focal 0.4s
=> [build 1/7] FROM mcr.microsoft.com/dotnet/sdk:6.0-focal#sha256:213bd9012c064e2e80c9ffc17e4e4ebd97fe01a232370af2eab31ecf4c773fcb 0.0s
=> [base 1/4] FROM mcr.microsoft.com/dotnet/runtime:6.0-focal#sha256:9adcd9a2eee0506f461f81226bea8d725c5111809f1afcd12534c523f6406665 0.0s
=> => transferring context: 172.90MB 3.3s
=> CACHED [base 2/4] WORKDIR /app 0.0s
=> CACHED [base 3/4] RUN adduser -u 5678 --disabled-password --gecos "" appuser && chown -R appuser /app 0.0s
=> CACHED [build 2/7] WORKDIR /src 0.0s
=> CACHED [build 3/7] COPY [sdk/samplecode/myAppExport/myAppExport.csproj, ./] 0.0s
=> CACHED [build 4/7] RUN dotnet restore "myAppExport.csproj" 0.0s
=> [build 5/7] COPY . . 5.6s
=> [base 4/4] COPY . . 5.6s
=> [final 1/2] WORKDIR /app 0.1s
=> [build 6/7] WORKDIR /src/. 0.1s
=> [build 7/7] RUN dotnet build "sdk/samplecode/myAppExport/myAppExport.csproj" -c Release -o /app/build 5.5s
=> [publish 1/1] RUN dotnet publish "sdk/samplecode/myAppExport/myAppExport.csproj" -c Release -o /app/publish 2.3s
=> [final 2/2] COPY --from=publish /app/publish . 0.1s
=> exporting to image 1.8s
=> => exporting layers 1.8s
=> => writing image sha256:96304565f390cf4ba352b792e6fb93c96832cdb41b56cd465feacf34f3f5005c 0.0s
=> => naming to docker.io/library/myAppextract:1 0.0s
Following is the logs when only gcc part is in dockerfile (removed dotnet part from dockerfile).
[+] Building 10.8s (12/12) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 1.74kB 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 35B 0.0s
=> [internal] load metadata for docker.io/library/gcc:latest 3.5s
=> [1/7] FROM docker.io/library/gcc:latest#sha256:084eaedf8e3c51f3db939ad7ed2b1455ff9ce4705845a014fb9fe5577b35c901 0.0s
=> [internal] load build context 0.1s
=> => transferring context: 54.94kB 0.1s
=> CACHED [2/7] RUN apt-get update 0.0s
=> CACHED [3/7] RUN apt-get install -y libmotif-dev 0.0s
=> [4/7] COPY . /usr/src/myapp 2.8s
=> [5/7] COPY ca-8-5-5-linux-x86-64/redist /usr/src/myapp/ca-8-5-5-linux-x86-64/sdk/demo 0.6s
=> [6/7] WORKDIR /usr/src/myapp/ca-8-5-5-linux-x86-64/sdk/samplecode/unix/ 0.1s
=> [7/7] RUN make 1.9s
=> exporting to image 1.7s
=> => exporting layers 1.6s
=> => writing image sha256:6904800ca9760db29751820b15f8952213ad084955f62c03ef98b6723b484420 0.0s
=> => naming to docker.io/library/myappextract:1

Answer 1

Actually I changed approach to the problem.
instead of doing FROM gcc:latest I added build-essential in following.
RUN apt-get install -y libmotif-dev build-essential
and that installed all required gcc and make dependencies and things are working as expected now.