diff options
Diffstat (limited to 'config/warnings.m4')
| -rw-r--r-- | config/warnings.m4 | 112 |
1 files changed, 111 insertions, 1 deletions
diff --git a/config/warnings.m4 b/config/warnings.m4 index b64b594..ce007f9 100644 --- a/config/warnings.m4 +++ b/config/warnings.m4 @@ -18,11 +18,12 @@ #along with GCC; see the file COPYING3. If not see #<http://www.gnu.org/licenses/>. -# ACX_PROG_CC_WARNING_OPTS(WARNINGS, [VARIABLE = WARN_CFLAGS) +# ACX_PROG_CC_WARNING_OPTS(WARNINGS, [VARIABLE = WARN_CFLAGS]) # Sets @VARIABLE@ to the subset of the given options which the # compiler accepts. AC_DEFUN([ACX_PROG_CC_WARNING_OPTS], [AC_REQUIRE([AC_PROG_CC])dnl +AC_LANG_PUSH(C) m4_pushdef([acx_Var], [m4_default([$2], [WARN_CFLAGS])])dnl AC_SUBST(acx_Var)dnl m4_expand_once([acx_Var= @@ -48,6 +49,7 @@ for real_option in $1; do done CFLAGS="$save_CFLAGS" m4_popdef([acx_Var])dnl +AC_LANG_POP(C) ])# ACX_PROG_CC_WARNING_OPTS # ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(WARNINGS, [VARIABLE = WARN_PEDANTIC]) @@ -55,6 +57,7 @@ m4_popdef([acx_Var])dnl # and accepts all of those options simultaneously, otherwise to nothing. AC_DEFUN([ACX_PROG_CC_WARNING_ALMOST_PEDANTIC], [AC_REQUIRE([AC_PROG_CC])dnl +AC_LANG_PUSH(C) m4_pushdef([acx_Var], [m4_default([$2], [WARN_PEDANTIC])])dnl AC_SUBST(acx_Var)dnl m4_expand_once([acx_Var= @@ -77,6 +80,7 @@ AS_IF([test AS_VAR_GET(acx_Pedantic) = yes], AS_VAR_POPDEF([acx_Pedantic])dnl m4_popdef([acx_Woptions])dnl m4_popdef([acx_Var])dnl +AC_LANG_POP(C) ])# ACX_PROG_CC_WARNING_ALMOST_PEDANTIC # ACX_PROG_CC_WARNINGS_ARE_ERRORS([x.y.z], [VARIABLE = WERROR]) @@ -88,6 +92,7 @@ m4_popdef([acx_Var])dnl # appeared on the configure command line. AC_DEFUN([ACX_PROG_CC_WARNINGS_ARE_ERRORS], [AC_REQUIRE([AC_PROG_CC])dnl +AC_LANG_PUSH(C) m4_pushdef([acx_Var], [m4_default([$2], [WERROR])])dnl AC_SUBST(acx_Var)dnl m4_expand_once([acx_Var= @@ -114,4 +119,109 @@ AS_IF([test $enable_werror_always = yes], [acx_Var="$acx_Var${acx_Var:+ }-Werror"]) AS_VAR_POPDEF([acx_GCCvers])]) m4_popdef([acx_Var])dnl +AC_LANG_POP(C) ])# ACX_PROG_CC_WARNINGS_ARE_ERRORS + +# ACX_PROG_CXX_WARNING_OPTS(WARNINGS, [VARIABLE = WARN_CXXFLAGS]) +# Sets @VARIABLE@ to the subset of the given options which the +# compiler accepts. +AC_DEFUN([ACX_PROG_CXX_WARNING_OPTS], +[AC_REQUIRE([AC_PROG_CXX])dnl +AC_LANG_PUSH(C++) +m4_pushdef([acx_Var], [m4_default([$2], [WARN_CXXFLAGS])])dnl +AC_SUBST(acx_Var)dnl +m4_expand_once([acx_Var= +],m4_quote(acx_Var=))dnl +save_CXXFLAGS="$CXXFLAGS" +for real_option in $1; do + # Do the check with the no- prefix removed since gcc silently + # accepts any -Wno-* option on purpose + case $real_option in + -Wno-*) option=-W`expr x$real_option : 'x-Wno-\(.*\)'` ;; + *) option=$real_option ;; + esac + AS_VAR_PUSHDEF([acx_Woption], [acx_cv_prog_cc_warning_$option]) + AC_CACHE_CHECK([whether $CXX supports $option], acx_Woption, + [CXXFLAGS="$option" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])], + [AS_VAR_SET(acx_Woption, yes)], + [AS_VAR_SET(acx_Woption, no)]) + ]) + AS_IF([test AS_VAR_GET(acx_Woption) = yes], + [acx_Var="$acx_Var${acx_Var:+ }$real_option"]) + AS_VAR_POPDEF([acx_Woption])dnl +done +CXXFLAGS="$save_CXXFLAGS" +m4_popdef([acx_Var])dnl +AC_LANG_POP(C++) +])# ACX_PROG_CXX_WARNING_OPTS + +# ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC(WARNINGS, [VARIABLE = WARN_PEDANTIC]) +# Append to VARIABLE "-pedantic" + the argument, if the compiler is G++ +# and accepts all of those options simultaneously, otherwise to nothing. +AC_DEFUN([ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC], +[AC_REQUIRE([AC_PROG_CXX])dnl +AC_LANG_PUSH(C++) +m4_pushdef([acx_Var], [m4_default([$2], [WARN_PEDANTIC])])dnl +AC_SUBST(acx_Var)dnl +m4_expand_once([acx_Var= +],m4_quote(acx_Var=))dnl +# Do the check with the no- prefix removed from the warning options +# since gcc silently accepts any -Wno-* option on purpose +m4_pushdef([acx_Woptions], [m4_bpatsubst([$1], [-Wno-], [-W])])dnl +AS_VAR_PUSHDEF([acx_Pedantic], [acx_cv_prog_cc_pedantic_]acx_Woptions)dnl +AS_IF([test "$GXX" = yes], +[AC_CACHE_CHECK([whether $CXX supports -pedantic ]acx_Woptions, acx_Pedantic, +[save_CXXFLAGS="$CXXFLAGS" +CXXFLAGS="-pedantic acx_Woptions" +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])], + [AS_VAR_SET(acx_Pedantic, yes)], + [AS_VAR_SET(acx_Pedantic, no)]) +CXXFLAGS="$save_CXXFLAGS"]) +AS_IF([test AS_VAR_GET(acx_Pedantic) = yes], + [acx_Var="$acx_Var${acx_Var:+ }-pedantic $1"]) +]) +AS_VAR_POPDEF([acx_Pedantic])dnl +m4_popdef([acx_Woptions])dnl +m4_popdef([acx_Var])dnl +AC_LANG_POP(C++) +])# ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC + +# ACX_PROG_CXX_WARNINGS_ARE_ERRORS([x.y.z], [VARIABLE = WERROR]) +# sets @VARIABLE@ to "-Werror" if the compiler is G++ >=x.y.z, or if +# --enable-werror-always was given on the command line, otherwise +# to nothing. +# If the argument is the word "manual" instead of a version number, +# then @VARIABLE@ will be set to -Werror only if --enable-werror-always +# appeared on the configure command line. +AC_DEFUN([ACX_PROG_CXX_WARNINGS_ARE_ERRORS], +[AC_REQUIRE([AC_PROG_CXX])dnl +AC_LANG_PUSH(C++) +m4_pushdef([acx_Var], [m4_default([$2], [WERROR])])dnl +AC_SUBST(acx_Var)dnl +m4_expand_once([acx_Var= +],m4_quote(acx_Var=))dnl +AC_ARG_ENABLE(werror-always, + AS_HELP_STRING([--enable-werror-always], + [enable -Werror despite compiler version]), +[], [enable_werror_always=no]) +AS_IF([test $enable_werror_always = yes], + [acx_Var="$acx_Var${acx_Var:+ }-Werror"]) + m4_if($1, [manual],, + [AS_VAR_PUSHDEF([acx_GXXvers], [acx_cv_prog_cxx_gxx_$1_or_newer])dnl + AC_CACHE_CHECK([whether $CXX is G++ >=$1], acx_GXXvers, + [set fnord `echo $1 | tr '.' ' '` + shift + AC_PREPROC_IFELSE( +[#if __GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ \ + < [$]1 * 10000 + [$]2 * 100 + [$]3 +#error insufficient +#endif], + [AS_VAR_SET(acx_GXXvers, yes)], + [AS_VAR_SET(acx_GXXvers, no)])]) + AS_IF([test AS_VAR_GET(acx_GXXvers) = yes], + [acx_Var="$acx_Var${acx_Var:+ }-Werror"]) + AS_VAR_POPDEF([acx_GXXvers])]) +m4_popdef([acx_Var])dnl +AC_LANG_POP(C++) +])# ACX_PROG_CXX_WARNINGS_ARE_ERRORS |