compile command executed inside script gives error, executed outside is fine…might be gcc

Question

I have a script called buildgcc.sh with the following contents.

mymac$more buildgcc.sh 
g++ -Wno-write-strings A.cpp B.cpp B.cpp c.cpp D.cpp E.cpp F.cpp artgdg.cpp G.cpp H.cpp I.cpp J.cpp K.cpp L.cpp M.cpp N.cpp O.cpp P.cpp

When I run the script I get an error:

mymac$./buildgcc.sh
No such file or directory+-4.2: P.cpp

But when I copy/paste the contents of the script into the command line:

mymac$g++ -Wno-write-strings A.cpp B.cpp B.cpp c.cpp D.cpp E.cpp F.cpp artgdg.cpp G.cpp H.cpp I.cpp J.cpp K.cpp L.cpp M.cpp N.cpp O.cpp P.cpp
mymac$

It works fine... anyone give me a clue what's going on here?

Answer 1

You need to put

#!/bin/sh

at the start of your script. Otherwise the system has no idea what the heck that .sh file is.

Alternately, you could do

sh buildgcc.sh

at the command line.