47 lines
1.7 KiB
Markdown
47 lines
1.7 KiB
Markdown
# What is GCC?
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The GNU Compiler Collection (GCC) is a compiler system produced by the GNU
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Project that supports various programming languages. GCC is a key component of
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the GNU toolchain. The Free Software Foundation (FSF) distributes GCC under the
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GNU General Public License (GNU GPL). GCC has played an important role in the
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growth of free software, as both a tool and an example.
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> [wikipedia.org/wiki/GNU_Compiler_Collection](https://en.wikipedia.org/wiki/GNU_Compiler_Collection)
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%%LOGO%%
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# How to use this image
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## Start a GCC instance running your app
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The most straightforward way to use this image is to use a gcc container as both
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the build and runtime environment. In your `Dockerfile`, writing something along
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the lines of the following will compile and run your project:
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FROM gcc:4.9
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COPY . /usr/src/myapp
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WORKDIR /usr/src/myapp
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RUN gcc -o myapp main.c
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CMD ["./myapp"]
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Then, build and run the Docker image:
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docker build -t my-gcc-app .
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docker run -it --rm --name my-running-app my-gcc-app
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## Compile your app inside the Docker container
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There may be occasions where it is not appropriate to run your app inside a
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container. To compile, but not run your app inside the Docker instance, you can
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write something like:
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docker run --rm -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp gcc:4.9 gcc -o myapp myapp.c
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This will add your current directory, as a volume, to the container, set the
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working directory to the volume, and run the command `gcc -o myapp myapp.c.`
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This tells gcc to compile the code in `myapp.c` and output the executable to
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myapp. Alternatively, if you have a `Makefile`, you can instead run the `make`
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command inside your container:
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docker run --rm -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp gcc:4.9 make
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