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* lib/autoconf/headers.m4 (AC_HEADER_STDBOOL): Fix overly-picky

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test for C99 conformance; (bool) 0.5 is an integer constant
expression, but (bool) -0.5 is not.  Problem reported by Fedor
Sergeev in <http://forum.sun.com/jive/thread.jspa?threadID=96202>.
This commit is contained in:
Paul Eggert 2006-05-15 02:22:28 +00:00
parent 22768c5765
commit 5e2a797ae7
2 changed files with 9 additions and 2 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2006-05-14 Paul Eggert <eggert@cs.ucla.edu>
* lib/autoconf/headers.m4 (AC_HEADER_STDBOOL): Fix overly-picky
test for C99 conformance; (bool) 0.5 is an integer constant
expression, but (bool) -0.5 is not. Problem reported by Fedor
Sergeev in <http://forum.sun.com/jive/thread.jspa?threadID=96202>.
2006-05-13 Paul Eggert <eggert@cs.ucla.edu>
* doc/autoconf.texi (Particular Programs): AC_PROG_MKDIR_P now

4
lib/autoconf/headers.m4
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@ -582,9 +582,9 @@ AC_DEFUN([AC_HEADER_STDBOOL],
char a[true == 1 ? 1 : -1];
char b[false == 0 ? 1 : -1];
char c[__bool_true_false_are_defined == 1 ? 1 : -1];
char d[(bool) -0.5 == true ? 1 : -1];
char d[(bool) 0.5 == true ? 1 : -1];
bool e = &s;
char f[(_Bool) -0.0 == false ? 1 : -1];
char f[(_Bool) 0.0 == false ? 1 : -1];
char g[true];
char h[sizeof (_Bool)];
char i[sizeof s.t];