https://sourceware.org/bugzilla/show_bug.cgi?id=33267
--- Comment #18 from Sam James <sam at gentoo dot org> ---
Thanks H.J.
It is nearly there, but the LAM tests fail for a silly reason:
```
FAIL: Build lam-u48.so
gcc -B/tmp/build/ld/tmpdir/ld/
-I/home/sam/git/binutils-gdb/ld/testsuite/ld-x86-64 -g -O2
-mno-direct-extern-access -fno-sanitize=all -c -fno-lto -c
/home/sam/git/binutils-gdb/ld/testsuite/ld-x86-64/dummy.s -o tmpdir/dummy.o
Executing on host: sh -c {gcc -B/tmp/build/ld/tmpdir/ld/
-I/home/sam/git/binutils-gdb/ld/testsuite/ld-x86-64 -g -O2
-mno-direct-extern-access -fno-sanitize=all -c -fno-lto -c
/home/sam/git/binutils-gdb/ld/testsuite/ld-x86-64/dummy.s -o tmpdir/dummy.o
2>&1} /dev/null ld.tmp (timeout = 300)
spawn [open ...]
gcc -B/tmp/build/ld/tmpdir/ld/ -L/usr/x86_64-pc-linux-gnu/lib64
-L/usr/local/lib64 -L/lib64 -L/usr/lib64 -L/usr/x86_64-pc-linux-gnu/lib
-L/usr/local/lib -L/lib -L/usr/lib -o tmpdir/lam-u57.so
-L/home/sam/git/binutils-gdb/ld/testsuite/ld-x86-64 -shared
-Wl,-z,lam-u57,-z,noindirect-extern-access -z nomemory-seal tmpdir/dummy.o
Executing on host: sh -c {gcc -B/tmp/build/ld/tmpdir/ld/
-L/usr/x86_64-pc-linux-gnu/lib64 -L/usr/local/lib64 -L/lib64 -L/usr/lib64
-L/usr/x86_64-pc-linux-gnu/lib -L/usr/local/lib -L/lib -L/usr/lib -o
tmpdir/lam-u57.so -L/home/sam/git/binutils-gdb/ld/testsuite/ld-x86-64 -shared
-Wl,-z,lam-u57,-z,noindirect-extern-access -z nomemory-seal tmpdir/dummy.o
2>&1} /dev/null ld.tmp (timeout = 300)
spawn [open ...]
/tmp/build/ld/../binutils/readelf -n tmpdir/lam-u57.so > dump.out
extra regexps in /home/sam/git/binutils-gdb/ld/testsuite/ld-x86-64/lam-u57.rd
starting with "^ Properties: x86 feature: .*LAM_U57.*$"
EOF from dump.out
output is
Displaying notes found in: .note.gnu.property
Owner Data size Description
GNU 0x00000040 NT_GNU_PROPERTY_TYPE_0
Properties: 1_needed:
x86 feature: LAM_U57
x86 feature used: x86
x86 ISA used: x86-64-baseline
[...]
```
i.e. We emit a blank `1_needed:` when noindirect-extern-access prunes it.
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