[PATCH v3] libsframe: testsuite: Fix testsuite build on Solaris

[Rainer Orth]

As reported in PR libsframe/33168, the libsframe tests don't build on
Solaris.  The failure is

In file included from libsframe/testsuite/libsframe.decode/be-flipping.c:28:
/usr/include/dejagnu.h:48:1: error: conflicting types for ‘wait’; have ‘void(void)’
   48 | wait (void)
      | ^~~~
In file included from /usr/include/stdlib.h:16,
                 from libsframe/testsuite/libsframe.decode/be-flipping.c:21:
/usr/include/sys/wait.h:85:14: note: previous declaration of ‘wait’ with type ‘pid_t(int *)’ {aka ‘long int(int *)’}
   85 | extern pid_t wait(int *);
      |              ^~~~

We have a combination of two factors here:

* Solaris <stdlib.h> has

#if defined(__EXTENSIONS__) || defined(_XPG4)
#include <sys/wait.h>
#endif

  and configure.ac predefines __EXTENSIONS__ due to the use of
  AC_USE_SYSTEM_EXTENSIONS.

* This conflicts with <dejagnu.h>'s definition

void
wait (void) 
{
...
}

While this version of wait was removed in upstream DejaGnu, the removal
only happened after the latest release, 1.6.3.

To avoid this, I've moved all testsuite includes into a new
sframe-test.h, adding a workaround for the wait conflict.

-Wall and -I$(srcdir) have been removed from AM_CPPFLAGS since they
don't seem to be needed.  To fix the Makefile fragment duplication, the
local.mk files now use $(testsuite_LDADD) and $(testsuite_CPPFLAGS)
throughout.

Tested on {i386,amd64}-pc-solaris2.11, {sparc,sparcv9}-sun-solaris2.11,
{x86_64,i686}-pc-linux-gnu, and amd64-pc-freebsd14.0.

Coauthored-By: Alan Modra <amodra@gmail.com>

Ok for trunk?

	Rainer

-- 
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University


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