1 AC_DEFUN([utrace_CC_m32], [dnl 2 AC_CACHE_CHECK([$CC option for 32-bit word size], utrace_cv_CC_m32, [dnl 3 save_CC="$CC" 4 utrace_cv_CC_m32=none 5 for ut_try in -m32 -m31; do 6 [CC=`echo "$save_CC" | sed 's/ -m[36][241]//'`" $ut_try"] 7 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int foo (void) { return 1; }]])], 8 [utrace_cv_CC_m32=$ut_try]) 9 test x$utrace_cv_CC_m32 = xnone || break 10 done 11 CC="$save_CC"])]) 12 13 AC_DEFUN([utrace_HOST64], [AC_REQUIRE([utrace_CC_m32]) 14 AS_IF([test x$utrace_cv_CC_m32 != xnone], [dnl 15 AC_CACHE_CHECK([for 64-bit host], utrace_cv_host64, [dnl 16 AC_EGREP_CPP([@utrace_host64@], [#include <stdint.h> 17 #if (UINTPTR_MAX > 0xffffffffUL) 18 @utrace_host64@ 19 #endif], 20 utrace_cv_host64=yes, utrace_cv_host64=no)]) 21 AS_IF([test $utrace_cv_host64 = no], 22 [utrace_biarch=-m64 utrace_thisarch=$utrace_cv_CC_m32], 23 [utrace_biarch=$utrace_cv_CC_m32 utrace_thisarch=-m64]) 24 25 biarch_CC=`echo "$CC" | sed "s/ *${utrace_thisarch}//"` 26 biarch_CC="$biarch_CC $utrace_biarch"])]) 27 28 AC_DEFUN([utrace_BIARCH], [AC_REQUIRE([utrace_HOST64]) 29 utrace_biarch_forced=no 30 AC_ARG_WITH([biarch], 31 AC_HELP_STRING([--with-biarch], 32 [enable biarch tests despite build problems]), 33 [AS_IF([test "x$with_biarch" != xno], [utrace_biarch_forced=yes])]) 34 AS_IF([test $utrace_biarch_forced = yes], [dnl 35 utrace_cv_cc_biarch=yes 36 AC_MSG_NOTICE([enabling biarch tests regardless using $biarch_CC])], [dnl 37 AS_IF([test x$utrace_cv_CC_m32 != xnone], [dnl 38 AC_CACHE_CHECK([whether $biarch_CC makes executables we can run], 39 utrace_cv_cc_biarch, [dnl 40 save_CC="$CC" 41 CC="$biarch_CC" 42 AC_RUN_IFELSE([AC_LANG_PROGRAM([], [])], 43 utrace_cv_cc_biarch=yes, utrace_cv_cc_biarch=no, utrace_cv_cc_biarch=no) 44 CC="$save_CC"])], [utrace_cv_cc_biarch=no]) 45 AS_IF([test $utrace_cv_cc_biarch != yes], [dnl 46 AC_MSG_WARN([not running biarch tests, $biarch_CC does not work])])]) 47 AM_CONDITIONAL(BIARCH, [test $utrace_cv_cc_biarch = yes])]) 48
