gnatgcc -c -pipe -O2 prog.adb
prog.adb:3:11: warning: file name does not match unit name, should be "matrix_mul.adb"
prog.adb:5:33: "Integers" is undefined (more references follow)
prog.adb:5:33: possible misspelling of "Integer"
prog.adb:12:25: missing ";"
prog.adb:16:01: no candidate interpretations match the actuals:
prog.adb:16:01: too many arguments in call to "put"
prog.adb:16:05: expected type "Standard.String"
prog.adb:16:05: found type of matrix_res declared at line 5
prog.adb:16:05: ==> in call to "Put" at a-tiinio.ads:77, instance at a-inteio.ads:18
prog.adb:16:05: ==> in call to "Put" at a-tiinio.ads:67, instance at a-inteio.ads:18
prog.adb:16:05: ==> in call to "Put" at a-tiinio.ads:61, instance at a-inteio.ads:18
prog.adb:16:05: ==> in call to "Put" at a-textio.ads:243
prog.adb:16:05: ==> in call to "Put" at a-textio.ads:209
gnatmake: "prog.adb" compilation error