To build C applications that use the Wasmer runtime as a host for guest Wasm modules, you will need a C compiler installed (
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:
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 dirmkdir wasmer-c-apitar -C wasmer-c-api -zxvf wasmer-c-api*.tar.gzexport WASMER_C_API=`pwd`/wasmer-c-api# Update LD_LIBRARY_PATH to link against the libwasmer.so in the examplesexport LD_LIBRARY_PATH=`pwd`/wasmer-c-api/lib/:$LD_LIBRARY_PATH
First, you can test if
gcc is installed already by running:
If this command does not return the version, then see the following:
clang is usually installed by default. However, if it is not, you can install gcc/clang by installing xcode-select on your mac.
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.
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: "LICENSE README.md include lib"ls $WASMER_C_API
Next, let's take a look at building a simple Hello World Example!