Re: Issues with posix functions on modern macOS/Xcode

[Martin Storsjö]

On Tue, 1 Dec 2020, Martin Storsjö wrote:

> On Xcode 12.2 on macOS 11.0 on arm64, the following sequence fails to build:
>
> $ ./gnulib-tool --create-testdir --dir=/tmp/testdir-posix \
>               --single-configure --avoid=havelib-tests \
>               `./posix-modules`
> $ cd /tmp/testdir-posix
> $ ./configure CPPFLAGS=-Wall 2>&1 | tee log1
> $ make 2>&1 | tee log2
> $ make check 2>&1 | tee log3
>
>
> The "make" step fails with the following error:
>
> gcc  -g -O2   -o test-dprintf-posix2 test-dprintf-posix2.o libtests.a 
> ../gllib/libgnu.a libtests.a ../gllib/libgnu.a libtests.a
> Undefined symbols for architecture arm64:
>  "_vm_region", referenced from:
>      _vma_iterate in libtests.a(vma-iter.o)
> ld: symbol(s) not found for architecture arm64
>
>
> This same bit does succeed on x86_64 though - it looks like 
> gnulib/lib/vma-iter.c has a macos specific arch check like this:
>
> # if defined __ppc64__ || defined __x86_64__
>
> This probably needs to be amended with "|| defined __aarch64__".
>
> On macOS 10.15.7 (Catalina) on x86_64, both with Xcode 11.7 and 12.2, the 
> following tests fail:
>
> FAIL: test-dprintf-posix2.sh
> FAIL: test-fflush2.sh
> FAIL: test-fprintf-posix3.sh
> FAIL: test-fpurge
> FAIL: test-ftell.sh
> FAIL: test-ftell2.sh
> FAIL: test-ftello.sh
> FAIL: test-ftello2.sh
> FAIL: test-futimens
> FAIL: test-renameat
> FAIL: test-renameatu
> FAIL: test-strsignal
> FAIL: test-utime
> FAIL: test-utimens
> FAIL: test-utimensat

FWIW, after fixing the vma-iter ifdef, the same tests fail in the same way 
on arm64 as on x86_64 (except that test-dprintf-posix2.sh doesn't seem to 
fail there).

So in any case, if the tests are made to pass on existing x86_64, they'll 
most probably work just the same way on arm64.

// Martin