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| author | Paul Eggert <eggert@cs.ucla.edu> | 2005-10-07 18:53:20 +0000 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2005-10-07 18:53:20 +0000 |
| commit | 25041cf0f9d055198d4744ee0fa4602bc9ce9198 (patch) | |
| tree | 4e798b72d485b6ecf44e7335fa65040ebbf9cccd /m4 | |
| parent | b17333e415ff19f0fb4070c77182a43e86c6d405 (diff) | |
| download | coreutils-25041cf0f9d055198d4744ee0fa4602bc9ce9198.tar.xz | |
(AC_HEADER_STDBOOL): Add an "#ifdef __xlc__" test,
since yesterday's attempt didn't work.
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/stdbool.m4 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/m4/stdbool.m4 b/m4/stdbool.m4 index 945a03653..8893d0b1e 100644 --- a/m4/stdbool.m4 +++ b/m4/stdbool.m4 @@ -71,6 +71,22 @@ AC_DEFUN([AC_HEADER_STDBOOL], _Bool n[m]; char o[sizeof n == m * sizeof n[0] ? 1 : -1]; char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1]; + #if defined __xlc__ || __GNUC__ + /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0 + reported by James Lemley on 2005-10-05; see + <http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html>. + This test is not quite right, since xlc is allowed to + reject this program, as the initializer for xlcbug is + not one of the forms that C requires support for. + However, doing the test right would require a run-time + test, and that would make crosss-compilation harder. + Let us hope that IBM fixes the xlc bug, and also adds + support for this kind of constant expression. In the + meantime, this test will reject xlc, which is OK, since + our stdbool.h substitute should suffice. */ + char digs[] = "0123456789"; + int xlcbug = 1 / (&(digs + 5)[-2 + (bool) 1] == &digs[4] ? 1 : -1); + #endif ], [ return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !j + !k + !l |