On Solaris 11.4, Solaris OpenIndiana, Solaris OmniOS, I see this test failure:

../../gltests/test-memalign.c:51: assertion 'aligned2_blocks[i] != NULL' failed
FAIL test-memalign (exit status: 262)

Apparently memalign() does not support alignments 1 and 2 on this platform.

This patch fixes it, by using malloc() in these cases. (Bumping the alignment
to 4 in these cases would be an alternative workaround.)


2020-12-31  Bruno Haible  <bruno@clisp.org>

	memalign: Work around Solaris bug.
	* lib/memalign.c: New file.
	* m4/memalign.m4: New file.
	* modules/memalign (Files): Add them.
	(Depends-on): Add malloc-h.
	(configure.ac): Invoke gl_FUNC_MEMALIGN. Conditionally compile
	memalign.c. Set module indicator.
	(Include): Include <malloc.h> unconditionally.
	* doc/glibc-functions/memalign.texi: Mention the Solaris issues.

	malloc-h: Add tests.
	* tests/test-malloc-h.c: New file.
	* modules/malloc-h-tests: New file.
	* tests/test-malloc-h-c++.cc: New file.
	* modules/malloc-h-c++-tests: New file.

	malloc-h: New module.
	* lib/malloc.in.h: New file.
	* m4/malloc_h.m4: New file.
	* modules/malloc-h: New file.
	* doc/glibc-headers/malloc.texi: New file.
	* doc/gnulib.texi (Glibc Header File Substitutes): Include it.