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build: support GNU bison 3.3, silence POSIX compatibility warning (bug #55613) * acinclude.m4 (OCTAVE_PROG_BISON): Define WARN_YFLAGS to include options to silence POSIX compatibility warnings from GNU bison. Use it when testing for required syntax support. * Makefile.am (AM_YFLAGS): Include ${WARN_YFLAGS} in the list of options.
author Mike Miller <mtmiller@octave.org>
date Thu, 31 Jan 2019 21:35:04 -0800
parents 3e6d559c8756
children 4af9840f9ce5
comparison
equal deleted inserted replaced
26670:c3c657ba1e97 26672:df42ea23502f
3178 dnl 3178 dnl
3179 dnl Check for bison. 3179 dnl Check for bison.
3180 dnl 3180 dnl
3181 AC_DEFUN([OCTAVE_PROG_BISON], [ 3181 AC_DEFUN([OCTAVE_PROG_BISON], [
3182 AC_PROG_YACC 3182 AC_PROG_YACC
3183 WARN_YFLAGS=
3183 3184
3184 case "`$YACC --version`" in 3185 case "`$YACC --version`" in
3185 *bison*) tmp_have_bison=yes ;; 3186 *bison*) tmp_have_bison=yes ;;
3186 *) tmp_have_bison=no ;; 3187 *) tmp_have_bison=no ;;
3187 esac 3188 esac
3188 3189
3189 if test $tmp_have_bison = yes; then 3190 if test $tmp_have_bison = yes; then
3191 dnl FIXME: Call GNU bison with the `-Wno-yacc` option, which works with
3192 dnl bison 2.5 and all later versions, as recommended by the bison NEWS.
3193 dnl This is needed as long as Octave supports Autoconf version 2.69 or
3194 dnl older. In Autoconf 2.70, AC_PROG_YACC no longer adds the `-y`
3195 dnl option to emulate POSIX yacc.
3196 WARN_YFLAGS="-Wno-yacc"
3197
3190 AC_CACHE_CHECK([syntax of bison api.prefix (or name-prefix) declaration], 3198 AC_CACHE_CHECK([syntax of bison api.prefix (or name-prefix) declaration],
3191 [octave_cv_bison_api_prefix_decl_style], [ 3199 [octave_cv_bison_api_prefix_decl_style], [
3192 style="api name" 3200 style="api name"
3193 quote="quote brace" 3201 quote="quote brace"
3194 for s in $style; do 3202 for s in $style; do
3212 %% 3220 %%
3213 input:; 3221 input:;
3214 %% 3222 %%
3215 EOF 3223 EOF
3216 ## Older versions of bison only warn and exit with success. 3224 ## Older versions of bison only warn and exit with success.
3217 octave_bison_output=`$YACC conftest.yy 2>&1` 3225 octave_bison_output=`$YACC $WARN_YFLAGS conftest.yy 2>&1`
3218 ac_status=$? 3226 ac_status=$?
3219 if test $ac_status -eq 0 && test -z "$octave_bison_output"; then 3227 if test $ac_status -eq 0 && test -z "$octave_bison_output"; then
3220 octave_cv_bison_api_prefix_decl_style="$s $q" 3228 octave_cv_bison_api_prefix_decl_style="$s $q"
3221 break 3229 break
3222 fi 3230 fi
3250 if you need to reconstruct parse.cc, which is the case if you're 3258 if you need to reconstruct parse.cc, which is the case if you're
3251 building from VCS sources. 3259 building from VCS sources.
3252 " 3260 "
3253 OCTAVE_CONFIGURE_WARNING([warn_bison]) 3261 OCTAVE_CONFIGURE_WARNING([warn_bison])
3254 fi 3262 fi
3263 AC_SUBST(WARN_YFLAGS)
3255 ]) 3264 ])
3256 dnl 3265 dnl
3257 dnl Find find program. 3266 dnl Find find program.
3258 dnl 3267 dnl
3259 ## Prefer GNU find if found. 3268 ## Prefer GNU find if found.