diff options
Diffstat (limited to 'Configure')
| -rwxr-xr-x | Configure | 102 |
1 files changed, 5 insertions, 97 deletions
@@ -19705,108 +19705,16 @@ EOM ;; esac -: Checking 32bit alignedness $cat <<EOM Checking to see whether you can access character data unalignedly... -EOM -case "$d_u32align" in -'') $cat >try.c <<EOCP -#include <stdio.h> -#$i_stdlib I_STDLIB -#ifdef I_STDLIB -#include <stdlib.h> -#endif -#define U32 $u32type -#define BYTEORDER 0x$byteorder -#define U8 $u8type -#include <signal.h> -#ifdef SIGBUS -$signal_t bletch(int s) { exit(4); } -#endif -int main() { -#if BYTEORDER == 0x1234 || BYTEORDER == 0x4321 - volatile U8 buf[8]; - volatile U32 *up; - int i; - - if (sizeof(U32) != 4) { - printf("sizeof(U32) is not 4, but %d\n", sizeof(U32)); - exit(1); - } - - fflush(stdout); - -#ifdef SIGBUS - signal(SIGBUS, bletch); -#endif - - buf[0] = 0; - buf[1] = 0; - buf[2] = 0; - buf[3] = 1; - buf[4] = 0; - buf[5] = 0; - buf[6] = 0; - buf[7] = 1; - - for (i = 0; i < 4; i++) { - up = (U32*)(buf + i); - if (! ((*up == 1 << (8*i)) || /* big-endian */ - (*up == 1 << (8*(3-i))) /* little-endian */ - ) - ) - { - printf("read failed (%x)\n", *up); - exit(2); - } - } - - /* write test */ - for (i = 0; i < 4; i++) { - up = (U32*)(buf + i); - *up = 0xBeef; - if (*up != 0xBeef) { - printf("write failed (%x)\n", *up); - exit(3); - } - } - exit(0); -#else - printf("1\n"); - exit(1); -#endif - return 0; -} -EOCP -set try -if eval $compile_ok; then - echo "(Testing for character data alignment may crash the test. That's okay.)" >&4 - $run ./try 2>&1 >/dev/null - case "$?" in - 0) cat >&4 <<EOM -You can access character data pretty unalignedly. -EOM - d_u32align="$undef" - ;; - *) cat >&4 <<EOM -It seems that you must access character data in an aligned manner. +We assume only aligned access is permitted. EOM - d_u32align="$define" - ;; - esac -else - rp='Can you access character data at unaligned addresses?' - dflt='n' - . ./myread - case "$ans" in - [yY]*) d_u32align="$undef" ;; - *) d_u32align="$define" ;; - esac -fi -$rm_try -;; +: Checking 32bit alignedness +: We no longer check and assume it is required. +case "$d_u32align" in +'') d_u32align="$define" ;; esac : see if ualarm exists |