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42 lines
1018 B
Plaintext
42 lines
1018 B
Plaintext
#serial 3
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dnl From Jim Meyering.
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dnl
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dnl Check whether putenv ("FOO") removes FOO from the environment.
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dnl The putenv in libc on at least SunOS 4.1.4 does *not* do that.
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dnl
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AC_DEFUN(jm_FUNC_PUTENV,
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[AC_CACHE_CHECK([for SVID conformant putenv], jm_cv_func_svid_putenv,
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[AC_TRY_RUN([
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int
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main ()
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{
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/* Put it in env. */
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if (putenv ("CONFTEST_putenv=val"))
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exit (1);
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/* Try to remove it. */
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if (putenv ("CONFTEST_putenv"))
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exit (1);
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/* Make sure it was deleted. */
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if (getenv ("CONFTEST_putenv") != 0)
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exit (1);
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exit (0);
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}
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],
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jm_cv_func_svid_putenv=yes,
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jm_cv_func_svid_putenv=no,
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dnl When crosscompiling, assume putenv is broken.
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jm_cv_func_svid_putenv=no)
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])
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if test $jm_cv_func_svid_putenv = no; then
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AC_SUBST(LIBOBJS)
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LIBOBJS="$LIBOBJS putenv.$ac_objext"
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AC_DEFINE_UNQUOTED(putenv, rpl_putenv,
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[Define to rpl_putenv if the replacement function should be used.])
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fi
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])
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