2016-09-10 14:59:09 +00:00
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dnl
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dnl Check whether _Unwind_GetIPInfo is available without doing a link
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dnl test so we can use this with libstdc++-v3 and libjava. Need to
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dnl use $target to set defaults because automatic checking is not possible
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dnl without a link test (and maybe even with a link test).
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dnl
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AC_DEFUN([GCC_CHECK_UNWIND_GETIPINFO], [
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AC_ARG_WITH(system-libunwind,
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[ --with-system-libunwind use installed libunwind])
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# If system-libunwind was not specifically set, pick a default setting.
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if test x$with_system_libunwind = x; then
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case ${target} in
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ia64-*-hpux*) with_system_libunwind=yes ;;
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*) with_system_libunwind=no ;;
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esac
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fi
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# Based on system-libunwind and target, do we have ipinfo?
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if test x$with_system_libunwind = xyes; then
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case ${target} in
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ia64-*-*) have_unwind_getipinfo=no ;;
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*) have_unwind_getipinfo=yes ;;
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esac
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else
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# Darwin before version 9 does not have _Unwind_GetIPInfo.
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changequote(,)
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case ${target} in
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*-*-darwin[3-8]|*-*-darwin[3-8].*) have_unwind_getipinfo=no ;;
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*) have_unwind_getipinfo=yes ;;
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esac
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changequote([,])
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fi
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if test x$have_unwind_getipinfo = xyes; then
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AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.])
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fi
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])
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# ACX_PROG_CC_WARNING_OPTS(WARNINGS, [VARIABLE = WARN_CFLAGS])
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# Sets @VARIABLE@ to the subset of the given options which the
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# compiler accepts.
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AC_DEFUN([ACX_PROG_CC_WARNING_OPTS],
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[AC_REQUIRE([AC_PROG_CC])dnl
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AC_LANG_PUSH(C)
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m4_pushdef([acx_Var], [m4_default([$2], [WARN_CFLAGS])])dnl
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AC_SUBST(acx_Var)dnl
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m4_expand_once([acx_Var=
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],m4_quote(acx_Var=))dnl
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save_CFLAGS="$CFLAGS"
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for real_option in $1; do
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# Do the check with the no- prefix removed since gcc silently
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# accepts any -Wno-* option on purpose
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case $real_option in
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-Wno-*) option=-W`expr x$real_option : 'x-Wno-\(.*\)'` ;;
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*) option=$real_option ;;
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esac
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AS_VAR_PUSHDEF([acx_Woption], [acx_cv_prog_cc_warning_$option])
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AC_CACHE_CHECK([whether $CC supports $option], acx_Woption,
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[CFLAGS="$option"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
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[AS_VAR_SET(acx_Woption, yes)],
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[AS_VAR_SET(acx_Woption, no)])
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])
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AS_IF([test AS_VAR_GET(acx_Woption) = yes],
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[acx_Var="$acx_Var${acx_Var:+ }$real_option"])
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AS_VAR_POPDEF([acx_Woption])dnl
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done
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CFLAGS="$save_CFLAGS"
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m4_popdef([acx_Var])dnl
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AC_LANG_POP(C)
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])# ACX_PROG_CC_WARNING_OPTS
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2018-01-12 18:26:02 +00:00
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