undefined references since newlib-3.2.0

[Josef Wolf]

Hello again,

finally, I have identified the commit, which makes my project to fail:

My project links just fine against newlib-df5c79f30c3f871b7e0edd6d4629af78b30fca15
but it fails with the error message shown below when linking against
newlib-f88aece242178ff0c187d56e34a79645fbc44a23

To be honest, I completely fail to understand how this commit
https://sourceware.org/git?p=newlib-cygwin.git;a=commit;h=f88aece242178ff0c187d56e34a79645fbc44a23
can possibly cause those link failures. After all,
f88aece242178ff0c187d56e34a79645fbc44a23 shows no traces of abort/exit/kill/getpid.

Any suggestions?

On Tue, Jun 09, 2020 at 08:00:25AM +0000, Wolf, Josef via Newlib wrote:
> 
> Since newlib-3.2.0, I get this error when linking one of my projects:
> 
> 
> $ m68k-unknown-elf-gcc -nostartfiles -Wl,--cref,--section-start=vectors=0 \
>     -Wl,-Ttext=0x400,--entry=entry -Wl,--oformat,elf32-m68k \
>     -Wl,--cref,-Map,proj.map \
>     -Wl,-T,ldscript.be -ansi -pedantic -Wall -Wcast-align \
>     -Wstrict-prototypes -Wmissing-prototypes -std=c89 -Wnull-dereference -g \
>     -O2 -fno-toplevel-reorder  -mcpu32  -o proj.elf `cat proj.objs` -lc
>       /m/a/local/crossgcc/m68k-unknown-elf/lib64/gcc/m68k-unknown-elf/9.3.0/../../../../m68k-unknown-elf/bin/ld: /m/a/local/crossgcc/m68k-unknown-elf/lib64/gcc/m68k-unknown-elf/9.3.0/../../../../m68k-unknown-elf/lib/mcpu32/libc.a(lib_a-abort.o):
>       in function `abort':
>       /m/a/tmp/builds/crossgcc/src/newlib-3.2.0/newlib/libc/stdlib/abort.c:59: undefined reference to `_exit'
>       /m/a/local/crossgcc/m68k-unknown-elf/lib64/gcc/m68k-unknown-elf/9.3.0/../../../../m68k-unknown-elf/bin/ld: /m/a/local/crossgcc/m68k-unknown-elf/lib64/gcc/m68k-unknown-elf/9.3.0/../../../../m68k-unknown-elf/lib/mcpu32/libc.a(lib_a-signalr.o):
>       in function `_kill_r':
>       /m/a/tmp/builds/crossgcc/src/newlib-3.2.0/newlib/libc/reent/signalr.c:53: undefined reference to `kill'
>       /m/a/local/crossgcc/m68k-unknown-elf/lib64/gcc/m68k-unknown-elf/9.3.0/../../../../m68k-unknown-elf/bin/ld: /m/a/local/crossgcc/m68k-unknown-elf/lib64/gcc/m68k-unknown-elf/9.3.0/../../../../m68k-unknown-elf/lib/mcpu32/libc.a(lib_a-signalr.o):
>       in function `_getpid_r':
>       /m/a/tmp/builds/crossgcc/src/newlib-3.2.0/newlib/libc/reent/signalr.c:83: undefined reference to `getpid'
> 
> The project builds just fine with newlib versions up to 3.1.0
> 
> newlib was configured like this:
> 
> /m/a/tmp/builds/crossgcc/src/newlib-3.2.0/configure --target=m68k-unknown-elf --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --prefix=/m/a/local/crossgcc/m68k-unknown-elf/nanoLibraries --enable-lite-exit --enable-newlib-nano-malloc --enable-newlib-nano-formatted-io --enable-newlib-reent-small --enable-newlib-retargetable-locking --enable-newlib-global-atexit --enable-newlib-global-stdio-streams --disable-newlib-supplied-syscalls --disable-newlib-fvwrite-in-streamio --disable-newlib-fseek-optimization --disable-newlib-wide-orient --disable-newlib-unbuf-stream-opt --disable-nls
> 
> Any suggestions?

-- 
Josef Wolf
jw@raven.inka.de