Properly building newlib to install spec files

Mojca Miklavec
Sun Oct 20 15:40:00 GMT 2019


I'm sorry for replying after such a long time, but I could not exactly
figure out what I was doing wrong until Joel today pointed out a dirty
simple little trick: I just had to make a symlink from gcc sources to
libgloss in order to install all the spec files ... and that solution
automatically worked, without the need to rebuild gcc the second time
(which would cause me a lot of headaches both in terms of
bootstrapping and compile times).

So basically just a matter of
    cd gcc-9.2.0
    ln -s ../newlib-3.1.0/libgloss .

We were already using
    ln -s ../newlib-3.1.0/newlib .
just not the libgloss thing.

It would be awesome if this was documented somewhere for complete newbies :)

I'll update all our cross-compilers to fix this.

Thank you very much,

On Mon, 7 Jan 2019 at 21:50, Jeff Johnston <> wrote:
> If you build and install the various components to the same installation directory, it should just work.
> See:
> (your gcc compiler config options may vary)
> If a spec file is installed somewhere else, you can use the -B option on the compile to specify a location for gcc to look for it.
> -- Jeff J.
> On Sat, Jan 5, 2019 at 4:20 PM Mojca Miklavec <> wrote:
>> Hi,
>> I'm fixing some packages for a package manager. I think I have a bunch
>> of various working gcc crosscompilers, but if I try to test something
>> like
>> $ msp430-elf-gcc -mmcu=msp430g2211 -specs=nosys.specs -o test.elf test.c
>> msp430-elf-gcc: error: nosys.specs: No such file or directory
>> apparently the specs files are missing.
>> I'm creating a symlink from gcc to newlib and build gcc with
>> --with-newlib, but apparently the files don't get installed. I noticed
>> that random instructions suggest separately building:
>> - first gcc
>> - then newlib
>> - then gcc again
>> while other instructions say to use just --with-newlib.
>> Can you please advise me how to build newlib in a proper way, so that
>> the spec files will be installed? Where should they usually end up?
>> Thank you very much,
>>     Mojca

More information about the Newlib mailing list