unsetenv: Add missing declaration on OSF/1 5.1.

[pspp] / ChangeLog

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+2010-12-19  Bruno Haible  <bruno@clisp.org>
+
+       unsetenv: Add missing declaration on OSF/1 5.1.
+       * lib/stdlib.in.h (setenv): Test HAVE_DECL_UNSETENV, not HAVE_UNSETENV.
+       * m4/setenv.m4 (gl_FUNC_UNSETENV): Test whether unsetenv is declared.
+       Don't set HAVE_UNSETENV. In the test program, set _BSD.
+       * m4/stdlib_h.m4 (gl_STDLIB_H_DEFAULTS): Initialize HAVE_DECL_UNSETENV,
+       not HAVE_UNSETENV.
+       * modules/stdlib (Makefile.am): Substitute HAVE_DECL_UNSETENV, not
+       HAVE_UNSETENV.
+       * doc/posix-functions/unsetenv.texi: Mention the OSF/1 5.1 problem.
+
 2010-12-19  Bruno Haible  <bruno@clisp.org>
 
        setenv: Add missing declaration on OSF/1 5.1.