diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/configure.in b/configure.in index 1675b3ba02a..ffe25635c8d 100644 --- a/configure.in +++ b/configure.in @@ -1832,7 +1832,10 @@ AC_CHECK_ALIGNOF(double) # Compute maximum alignment of any basic type. # We assume long's alignment is at least as strong as char, short, or int; -# but we must check long long (if it exists) and double. +# but we must check long long (if it is being used for int64) and double. +# Note that we intentionally do not consider any types wider than 64 bits, +# as allowing MAXIMUM_ALIGNOF to exceed 8 would be too much of a penalty +# for disk and memory space. MAX_ALIGNOF=$ac_cv_alignof_long if test $MAX_ALIGNOF -lt $ac_cv_alignof_double ; then @@ -1849,7 +1852,7 @@ AC_DEFINE_UNQUOTED(MAXIMUM_ALIGNOF, $MAX_ALIGNOF, [Define as the maximum alignme AC_CHECK_TYPES([int8, uint8, int64, uint64], [], [], [#include <stdio.h>]) -# Check for extensions offering the integer scalar type __int128. +# Some compilers offer a 128-bit integer scalar type. PGAC_TYPE_128BIT_INT # Check for various atomic operations now that we have checked how to declare |