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(AC_CHECK_SIZEOF): Cast sizeof to unsigned long, to work around a bug

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in the HP C compiler version HP92453-01 B.11.11.23709.GP.
This commit is contained in:
Paul Eggert 2001-10-18 23:42:01 +00:00
parent 1cca42f044
commit 70e6f24483
1 changed files with 5 additions and 1 deletions
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6
lib/autoconf/types.m4
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@ -352,7 +352,11 @@ AC_DEFUN([AC_CHECK_SIZEOF],
AC_CHECK_TYPE([$1], [], [], [$3])
AC_CACHE_CHECK([size of $1], AS_TR_SH([ac_cv_sizeof_$1]),
[if test "$AS_TR_SH([ac_cv_type_$1])" = yes; then
_AC_COMPUTE_INT([sizeof ($1)],
# The cast to unsigned long works around a bug in the HP C Compiler
# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
# declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
# This bug is HP SR number 8606223364.
_AC_COMPUTE_INT([(unsigned long) (sizeof ($1))],
[AS_TR_SH([ac_cv_sizeof_$1])],
[AC_INCLUDES_DEFAULT([$3])],
[AC_MSG_ERROR([cannot compute sizeof ($1), 77])])