Setup your C/C++ environment
To build C applications that use the Wasmer runtime as a host for guest Wasm modules, you will need a C compiler installed (clang
or gcc
, for example). Check the compiler installation instructions here.
Download our SDK for the C-API from Wasmer releases page. Depending on your system, you will need to download:
Linux:
wasmer-linux-amd64.tar.gz
orwasmer-linux-aarch64.tar.gz
macOS:
wasmer-darwin-amd64.tar.gz
Windows:
wasmer-windows.tar.gz
Once you have downloaded the c-api file, you can now extract its contents and set the WASMER_C_API
environment variable to the path of the wasmer-c-api directory (this will be very useful when running the examples):
# Extract the contents to a dir
mkdir wasmer
tar -C wasmer -zxvf wasmer-*.tar.gz
export WASMER_DIR=$(pwd)/wasmer
# Update LD_LIBRARY_PATH to link against the libwasmer.so in the examples
export LD_LIBRARY_PATH=$WASMER_DIR/lib/:$LD_LIBRARY_PATH
Installing Clang/GCC
First, you can test if clang
or gcc
is installed already by running:
gcc --version
If this command does not return the version, then see the following:
MacOS
gcc
/ clang
is usually installed by default. However, if it is not, you can install gcc/clang by installing xcode-select on your mac.
Debian / Debian Based / Linux
To install gcc on a Debian based, you will want to run the following:
sudo apt-get install build-essential
Gcc should be installable on your favorite linux distro as well. Please search for the correct command for your desired distribution.
Windows
To install gcc on Windows, you will probably want to install a GNU environment on windows. We suggest using MinGW.
gcc --version
# This should output: "ATTRIBUTIONS LICENSE bin include lib"
ls $WASMER_DIR
If these commands work, The compiler and the Wasmer C API are successfully installed!
Next, let's take a look at some examples!
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