1dnl 2dnl Check whether _Unwind_GetIPInfo is available without doing a link 3dnl test so we can use this with libstdc++-v3 and libjava. Need to 4dnl use $target to set defaults because automatic checking is not possible 5dnl without a link test (and maybe even with a link test). 6dnl 7 8AC_DEFUN([GCC_CHECK_UNWIND_GETIPINFO], [ 9 AC_ARG_WITH(system-libunwind, 10 [ --with-system-libunwind use installed libunwind]) 11 # If system-libunwind was not specifically set, pick a default setting. 12 if test x$with_system_libunwind = x; then 13 case ${target} in 14 ia64-*-hpux*) with_system_libunwind=yes ;; 15 *) with_system_libunwind=no ;; 16 esac 17 fi 18 # Based on system-libunwind and target, do we have ipinfo? 19 if test x$with_system_libunwind = xyes; then 20 case ${target} in 21 ia64-*-*) have_unwind_getipinfo=no ;; 22 *) have_unwind_getipinfo=yes ;; 23 esac 24 else 25 # Darwin before version 9 does not have _Unwind_GetIPInfo. 26 changequote(,) 27 case ${target} in 28 *-*-darwin[3-8]|*-*-darwin[3-8].*) have_unwind_getipinfo=no ;; 29 *) have_unwind_getipinfo=yes ;; 30 esac 31 changequote([,]) 32 fi 33 34 if test x$have_unwind_getipinfo = xyes; then 35 AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.]) 36 fi 37]) 38 39# ACX_PROG_CC_WARNING_OPTS(WARNINGS, [VARIABLE = WARN_CFLAGS]) 40# Sets @VARIABLE@ to the subset of the given options which the 41# compiler accepts. 42AC_DEFUN([ACX_PROG_CC_WARNING_OPTS], 43[AC_REQUIRE([AC_PROG_CC])dnl 44AC_LANG_PUSH(C) 45m4_pushdef([acx_Var], [m4_default([$2], [WARN_CFLAGS])])dnl 46AC_SUBST(acx_Var)dnl 47m4_expand_once([acx_Var= 48],m4_quote(acx_Var=))dnl 49save_CFLAGS="$CFLAGS" 50for real_option in $1; do 51 # Do the check with the no- prefix removed since gcc silently 52 # accepts any -Wno-* option on purpose 53 case $real_option in 54 -Wno-*) option=-W`expr x$real_option : 'x-Wno-\(.*\)'` ;; 55 *) option=$real_option ;; 56 esac 57 AS_VAR_PUSHDEF([acx_Woption], [acx_cv_prog_cc_warning_$option]) 58 AC_CACHE_CHECK([whether $CC supports $option], acx_Woption, 59 [CFLAGS="$option" 60 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])], 61 [AS_VAR_SET(acx_Woption, yes)], 62 [AS_VAR_SET(acx_Woption, no)]) 63 ]) 64 AS_IF([test AS_VAR_GET(acx_Woption) = yes], 65 [acx_Var="$acx_Var${acx_Var:+ }$real_option"]) 66 AS_VAR_POPDEF([acx_Woption])dnl 67done 68CFLAGS="$save_CFLAGS" 69m4_popdef([acx_Var])dnl 70AC_LANG_POP(C) 71])# ACX_PROG_CC_WARNING_OPTS 72 73