error trying to exec `as’: execvp: No such file or directory



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I have downloaded gfortran and gcc and they are safely tucked into /usr/local/bin!

However, gfortran test.f (where test.f is a Hello World write statement!) gives me the above error message.

Would some kind person suggest the next step!


This error usually means that gcc isn’t installed. However since you have it installed in /usr/local/bin you’ll want to make sure /usr/local/bin is in your default PATH. This error means that ‘as’ which is the assembler can’t be found.

In csh/tcsh:

setenv PATH ${PATH}:/usr/local/bin

In bash/sh:

I use the gcc that comes with Xcode, so it appears by default. In my case, it’s located in /usr/bin:

[computer:apbs] admin% which as

I’d check for ‘as’ in /usr/bin and /usr/local/bin . Alternatively you may want to install gcc from Xcode, unless you need a newer gcc.

export PATH=${PATH}:/usr/local/bin

Hope that helps,

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