A low-level build tool for Ada programs (part of the GNAT toolchain). More information: https://gcc.gnu.org/onlinedocs/gnat_ugn/Building-with-gnatmake.html.
gnatmake source_file1.adb source_file2.adb ...
gnatmake -o executable_name source_file.adb
gnatmake -f source_file.adb