#2352: POSIX.1 unsetenv returns int
-------------------------------+--------------------------------------------
Reporter: donn | Owner:
Type: bug | Status: new
Priority: normal | Component: libraries/unix
Version: 6.8.2 | Severity: minor
Keywords: | Testcase:
Architecture: x86_64 (amd64) | Os: NetBSD
-------------------------------+--------------------------------------------
While plenty of C libraries declare void unsetenv(), the POSIX.1003.1
standard is int unsetenv(), with return values 0 or -1. In the latter
case, errno is set to EINVAL, for causes including the present of "=" in
the value. Of course this is not of earthshaking importance.
The following is the autoconf test (just a copy of the same test for
usleep().)
--- libraries/unix/configure.ac.dist 2008-06-03 10:39:45.000000000
-0700
+++ libraries/unix/configure.ac 2008-06-06 21:43:19.000000000 -0700
@@ -75,6 +75,19 @@
;;
esac
+### POSIX.1003.1 unsetenv returns 0 or -1 (EINVAL), but older
implementations
+### in common use return void.
+AC_CACHE_CHECK([return type of unsetenv], cv_func_unsetenv_return_type,
+ [AC_EGREP_HEADER(changequote(<, >)<void[ ]+unsetenv>changequote([,
]),
+ /usr/include/stdlib.h,
+ [cv_func_unsetenv_return_type=void],
+ [cv_func_unsetenv_return_type=int])])
+case "$cv_func_unsetenv_return_type" in
+ "void" )
+ AC_DEFINE([UNSETENV_RETURNS_VOID], [1], [Define if stdlib.h declares
unsetenv to return void.])
+ ;;
+esac
+
dnl ** sometimes RTLD_NEXT is hidden in #ifdefs we really don't wan to
set
AC_MSG_CHECKING(for RTLD_NEXT from dlfcn.h)
AC_EGREP_CPP(yes,
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2352>
GHC <http://www.haskell.org/ghc/>
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