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[86.166.129.230]) by smtp.gmail.com with ESMTPSA id l20sm31418892wrh.82.2021.01.18.02.01.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Jan 2021 02:01:56 -0800 (PST) Date: Mon, 18 Jan 2021 10:01:55 +0000 From: Andrew Burgess To: Mike Frysinger Subject: Re: [PATCH] sim: common: delete configure & Makefile Message-ID: <20210118100155.GQ265215@embecosm.com> References: <20210117101044.32143-1-vapier@gentoo.org> <20210117103631.6518-1-vapier@gentoo.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <20210117103631.6518-1-vapier@gentoo.org> X-Operating-System: Linux/5.8.13-100.fc31.x86_64 (x86_64) X-Uptime: 10:01:45 up 40 days, 14:46, X-Editor: GNU Emacs [ http://www.gnu.org/software/emacs ] X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: gdb-patches@sourceware.org Errors-To: gdb-patches-bounces@sourceware.org Sender: "Gdb-patches" * Mike Frysinger via Gdb-patches [2021-01-17 0= 5:36:31 -0500]: > This was mostly orphaned a while back, but left behind so people could > still run `make headers`. Merge that one target to the top sim dir and > delete all the build logic. This should avoid confusing people further. >=20 > sim/: > * Makefile.in (abs_srcdir, srcroot, CPP): Define. > (nltvals): New target. > * README-HACKING: Change headers to nltvals. >=20 > sim/common/: > * configure, configure.ac, Makefile.in: Delete. LGTM. Andrew > --- > sim/Makefile.in | 16 + > sim/README-HACKING | 6 +- > sim/common/Makefile.in | 135 -- > sim/common/configure | 3718 --------------------------------------- > sim/common/configure.ac | 34 - > sim/configure | 179 +- > sim/configure.ac | 1 + > 7 files changed, 198 insertions(+), 3891 deletions(-) > delete mode 100644 sim/common/Makefile.in > delete mode 100755 sim/common/configure > delete mode 100644 sim/common/configure.ac >=20 > diff --git a/sim/Makefile.in b/sim/Makefile.in > index ca41cb6f65e5..6c15b8b3a780 100644 > --- a/sim/Makefile.in > +++ b/sim/Makefile.in > @@ -19,6 +19,8 @@ > =20 > VPATH =3D @srcdir@ > srcdir =3D @srcdir@ > +abs_srcdir =3D @abs_srcdir@ > +srcroot =3D $(abs_srcdir)/.. > =20 > prefix =3D @prefix@ > exec_prefix =3D @exec_prefix@ > @@ -54,6 +56,7 @@ INSTALL_DATA =3D @INSTALL_DATA@ > AR =3D @AR@ > AR_FLAGS =3D rc > CC =3D @CC@ > +CPP =3D @CPP@ > CFLAGS =3D @CFLAGS@ > CC_FOR_BUILD =3D @CC_FOR_BUILD@ > CFLAGS_FOR_BUILD =3D @CFLAGS_FOR_BUILD@ > @@ -221,6 +224,19 @@ Makefile: Makefile.in config.status > config.status: configure > $(SHELL) ./config.status --recheck > =20 > +# Generate nltvals.def for newlib/libgloss using devo and build tree. > +# This file is shipped with distributions so we build in the source dir. > +# Use `make nltvals' to rebuild. > +# Note: If gdb releases begin to contain target header files (not a good= idea, > +# but if they did ...), nltvals.def coud be generated at build time. > +# An alternative is to slurp in the tables at runtime. > +.PHONY: nltvals > +nltvals: > + set -e ; \ > + rm -f $(abs_srcdir)/common/nltvals.new ; \ > + $(SHELL) $(abs_srcdir)/common/gennltvals.sh --cpp "$(CPP)" --output $(a= bs_srcdir)/common/nltvals.new --srcroot $(srcroot) ; \ > + $(SHELL) $(srcroot)/move-if-change $(abs_srcdir)/common/nltvals.new $(a= bs_srcdir)/common/nltvals.def > + > # Utility to run autoconf in each directory that uses the common framewo= rk. > # This is intended to be invoked in $srcdir as > # "make -f Makefile.in autoconf-common SHELL=3D/bin/sh". > diff --git a/sim/README-HACKING b/sim/README-HACKING > index 7f0f93e0ab49..583a559d2b0c 100644 > --- a/sim/README-HACKING > +++ b/sim/README-HACKING > @@ -191,10 +191,10 @@ convenience): > $ cd /tmp/$$/build > $ /tmp/$$/devo/configure --target=3Dd10v-elf > =20 > -In the sim/common directory rebuild the headers: > +In the sim/ directory rebuild the headers: > =20 > - $ cd sim/common > - $ make headers > + $ cd sim/ > + $ make nltvals > =20 > To add a new target: > =20 > diff --git a/sim/common/Makefile.in b/sim/common/Makefile.in > deleted file mode 100644 > index 33cd788737cb..000000000000 > --- a/sim/common/Makefile.in > +++ /dev/null > @@ -1,135 +0,0 @@ > -# Makefile template for Configure for simulator common directory > -# Copyright (C) 1996-2021 Free Software Foundation, Inc. > -#=20 > -# This program is free software; you can redistribute it and/or modify > -# it under the terms of the GNU General Public License as published by > -# the Free Software Foundation; either version 3 of the License, or > -# (at your option) any later version. > -# > -# This program is distributed in the hope that it will be useful, > -# but WITHOUT ANY WARRANTY; without even the implied warranty of > -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > -# GNU General Public License for more details. > -# > -# You should have received a copy of the GNU General Public License > -# along with this program. If not, see . > - > -default: all > - > -VPATH =3D @srcdir@ > -srcdir =3D @srcdir@ > -abs_srcdir =3D @abs_srcdir@ > -srcroot =3D $(abs_srcdir)/../.. > - > -prefix =3D @prefix@ > -exec_prefix =3D @exec_prefix@ > - > -host_alias =3D @host_alias@ > -target_alias =3D @target_alias@ > -program_transform_name =3D @program_transform_name@ > -bindir =3D @bindir@ > - > -libdir =3D @libdir@ > -tooldir =3D $(libdir)/$(target_alias) > - > -datarootdir =3D @datarootdir@ > -datadir =3D @datadir@ > -mandir =3D @mandir@ > -man1dir =3D $(mandir)/man1 > -infodir =3D @infodir@ > -includedir =3D @includedir@ > - > -SHELL =3D /bin/sh > - > -INSTALL =3D @INSTALL@ > -INSTALL_PROGRAM =3D @INSTALL_PROGRAM@ > -INSTALL_DATA =3D @INSTALL_DATA@ > - > -CC =3D @CC@ > -CC_FOR_BUILD =3D @CC_FOR_BUILD@ > -CFLAGS =3D @CFLAGS@ > - > -# These are used to rebuild nltvals.def. > -CPP_FOR_TARGET =3D @CPP_FOR_TARGET@ > -TARGET_SUBDIR =3D @TARGET_SUBDIR@ > - > -HDEFINES =3D @HDEFINES@ > -TDEFINES =3D > - > -CONFIG_CFLAGS =3D @DEFS@ $(HDEFINES) $(TDEFINES) > -CSEARCH =3D -I. -I$(srcdir) -I$(srcroot)/include > -ALL_CFLAGS =3D $(CFLAGS) $(CONFIG_CFLAGS) $(CSEARCH) > -BUILD_CFLAGS =3D -g -O $(CSEARCH) > - > -AR =3D @AR@ > -AR_FLAGS =3D rc > -RANLIB =3D @RANLIB@ > -MAKEINFO =3D makeinfo > - > -.NOEXPORT: > -MAKEOVERRIDES=3D > - > -all: > - > -# Generate nltvals.def for newlib/libgloss using devo and build tree. > -# This file is shipped with distributions so we build in the source dir. > -# Use `make headers' to rebuild. > -# Note: If gdb releases begin to contain target header files (not a good= idea, > -# but if they did ...), nltvals.def coud be generated at build time. > -# An alternative is to slurp in the tables at runtime. > -.PHONY: headers > -headers: > - rootme=3D`pwd` ; \ > - cd $(srcdir) ; \ > - rm -f nltvals.new ; \ > - $(SHELL) $(abs_srcdir)/gennltvals.sh --cpp "$(CPP_FOR_TARGET)" --srcroo= t $(srcroot) --output nltvals.new ; \ > - $(SHELL) $(srcroot)/move-if-change nltvals.new nltvals.def > - > -.c.o: > - $(CC) -c $< $(ALL_CFLAGS) > - > -check: > - > -info: > -clean-info: > -install-info: > - > -tags etags: TAGS > - > -# Macros like EXTERN_SIM_CORE confuse tags. > -# And the sim-n-foo.h files create functions that can't be found either. > -TAGS: force > - cd $(srcdir) && \ > - etags --regex '/^\([a-z_]+\) (/\1/' --regex '/^.*\/[*] TAGS: .*/' \ > - *.c *.h > - > -clean: > - rm -f *.[oa] *~ core > - > -distclean mostlyclean maintainer-clean realclean: clean > - rm -f TAGS > - rm -f Makefile config.cache config.log config.status > - > -# Dummy target to force execution of dependent targets. > -force: > - > -# Copy the files into directories where they will be run. > -install: install-man > -install-strip: install-man > - > -install-man: installdirs > - n=3D`echo run | sed '$(program_transform_name)'`; \ > - $(INSTALL_DATA) $(srcdir)/run.1 $(DESTDIR)$(man1dir)/$$n.1 > - > -installdirs: > - $(SHELL) $(srcdir)/../../mkinstalldirs $(DESTDIR)$(man1dir) > - > -Makefile: Makefile.in config.status > - $(SHELL) ./config.status > - > -config.status: configure > - $(SHELL) ./config.status --recheck > - > -config.h: stamp-h ; @true > -stamp-h: config.in config.status > - CONFIG_FILES=3D CONFIG_HEADERS=3Dconfig.h:config.in $(SHELL) ./config.s= tatus > diff --git a/sim/common/configure b/sim/common/configure > deleted file mode 100755 > index 8be2e6535f0c..000000000000 > --- a/sim/common/configure > +++ /dev/null > @@ -1,3718 +0,0 @@ > -#! /bin/sh > -# Guess values for system-dependent variables and create Makefiles. > -# Generated by GNU Autoconf 2.69. > -# > -# > -# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc. > -# > -# > -# This configure script is free software; the Free Software Foundation > -# gives unlimited permission to copy, distribute and modify it. > -## -------------------- ## > -## M4sh Initialization. ## > -## -------------------- ## > - > -# Be more Bourne compatible > -DUALCASE=3D1; export DUALCASE # for MKS sh > -if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then : > - emulate sh > - NULLCMD=3D: > - # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which > - # is contrary to our usage. Disable this feature. > - alias -g '${1+"$@"}'=3D'"$@"' > - setopt NO_GLOB_SUBST > -else > - case `(set -o) 2>/dev/null` in #( > - *posix*) : > - set -o posix ;; #( > - *) : > - ;; > -esac > -fi > - > - > -as_nl=3D' > -' > -export as_nl > -# Printing a long string crashes Solaris 7 /usr/bin/printf. > -as_echo=3D'\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\= \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' > -as_echo=3D$as_echo$as_echo$as_echo$as_echo$as_echo > -as_echo=3D$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo > -# Prefer a ksh shell builtin over an external printf program on Solaris, > -# but without wasting forks for bash or zsh. > -if test -z "$BASH_VERSION$ZSH_VERSION" \ > - && (test "X`print -r -- $as_echo`" =3D "X$as_echo") 2>/dev/null; then > - as_echo=3D'print -r --' > - as_echo_n=3D'print -rn --' > -elif (test "X`printf %s $as_echo`" =3D "X$as_echo") 2>/dev/null; then > - as_echo=3D'printf %s\n' > - as_echo_n=3D'printf %s' > -else > - if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" =3D "X-n $as_e= cho"; then > - as_echo_body=3D'eval /usr/ucb/echo -n "$1$as_nl"' > - as_echo_n=3D'/usr/ucb/echo -n' > - else > - as_echo_body=3D'eval expr "X$1" : "X\\(.*\\)"' > - as_echo_n_body=3D'eval > - arg=3D$1; > - case $arg in #( > - *"$as_nl"*) > - expr "X$arg" : "X\\(.*\\)$as_nl"; > - arg=3D`expr "X$arg" : ".*$as_nl\\(.*\\)"`;; > - esac; > - expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl" > - ' > - export as_echo_n_body > - as_echo_n=3D'sh -c $as_echo_n_body as_echo' > - fi > - export as_echo_body > - as_echo=3D'sh -c $as_echo_body as_echo' > -fi > - > -# The user is always right. > -if test "${PATH_SEPARATOR+set}" !=3D set; then > - PATH_SEPARATOR=3D: > - (PATH=3D'/bin;/bin'; FPATH=3D$PATH; sh -c :) >/dev/null 2>&1 && { > - (PATH=3D'/bin:/bin'; FPATH=3D$PATH; sh -c :) >/dev/null 2>&1 || > - PATH_SEPARATOR=3D';' > - } > -fi > - > - > -# IFS > -# We need space, tab and new line, in precisely that order. Quoting is > -# there to prevent editors from complaining about space-tab. > -# (If _AS_PATH_WALK were called with IFS unset, it would disable word > -# splitting by setting IFS to empty value.) > -IFS=3D" "" $as_nl" > - > -# Find who we are. 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"could not create $ac_file" "$LINENO" 5 > - ;; > - > - > - > - esac > - > -done # for ac_tag > - > - > -as_fn_exit 0 > -_ACEOF > -ac_clean_files=3D$ac_clean_files_save > - > -test $ac_write_fail =3D 0 || > - as_fn_error $? "write failure creating $CONFIG_STATUS" "$LINENO" 5 > - > - > -# configure is writing to config.log, and then calls config.status. > -# config.status does its own redirection, appending to config.log. > -# Unfortunately, on DOS this fails, as config.log is still kept open > -# by configure, so config.status won't be able to write to it; its > -# output is simply discarded. So we exec the FD to /dev/null, > -# effectively closing config.log, so it can be properly (re)opened and > -# appended to by config.status. When coming back to configure, we > -# need to make the FD available again. > -if test "$no_create" !=3D yes; then > - ac_cs_success=3D: > - ac_config_status_args=3D > - test "$silent" =3D yes && > - ac_config_status_args=3D"$ac_config_status_args --quiet" > - exec 5>/dev/null > - $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=3Dfalse > - exec 5>>config.log > - # Use ||, not &&, to avoid exiting from the if with $? =3D 1, which > - # would make configure fail if this is the last instruction. > - $ac_cs_success || as_fn_exit 1 > -fi > -if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != =3D no; then > - { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options= : $ac_unrecognized_opts" >&5 > -$as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" = >&2;} > -fi > - > diff --git a/sim/common/configure.ac b/sim/common/configure.ac > deleted file mode 100644 > index ec4ee203743b..000000000000 > --- a/sim/common/configure.ac > +++ /dev/null > @@ -1,34 +0,0 @@ > -dnl Process this file with autoconf to produce a configure script. > -AC_INIT(Makefile.in) > - > -AC_PROG_CC > - > -# Put a useful copy of CPP_FOR_TARGET in Makefile. > -# This is only used to build the target values header files. These file= s are > -# shipped with distributions so CPP_FOR_TARGET only needs to work in > -# developer's trees. This value is borrowed from ../../Makefile.in. > -CPP_FOR_TARGET=3D"\` \ > - if test -f \$\${rootme}/../../gcc/Makefile ; then \ > - if test -f \$\${rootme}/../../\$(TARGET_SUBDIR)/newlib/Makefile ; th= en \ > - echo \$\${rootme}/../../gcc/xgcc -B\$\${rootme}/../../gcc/ -idiraf= ter \$\${rootme}/../../\$(TARGET_SUBDIR)/newlib/targ-include -idirafter \$(= srcroot)/newlib/libc/include -nostdinc; \ > - else \ > - echo \$\${rootme}/../../gcc/xgcc -B\$\${rootme}/../../gcc/; \ > - fi; \ > - else \ > - if test '\$(host_canonical)' =3D '\$(target_canonical)' ; then \ > - echo \$(CC); \ > - else \ > - t=3D'\$(program_transform_name)'; echo gcc | sed -e 's/x/x/' \$\$t= ; \ > - fi; \ > - fi\` -E" > -AC_SUBST(CPP_FOR_TARGET) > - > -# Set TARGET_SUBDIR, needed by CPP_FOR_TARGET. > -if test x"${host}" =3D x"${target}" ; then > - TARGET_SUBDIR=3D"." > -else > - TARGET_SUBDIR=3D${target_alias} > -fi > -AC_SUBST(TARGET_SUBDIR) > - > -AC_OUTPUT(Makefile) > diff --git a/sim/configure b/sim/configure > index 7093cb1f1cf6..28ed5d7691d5 100755 > --- a/sim/configure > +++ b/sim/configure > @@ -590,6 +590,7 @@ subdirs > CFLAGS_FOR_BUILD > CC_FOR_BUILD > HDEFINES > +CPP > target_os > target_vendor > target_cpu > @@ -664,7 +665,8 @@ CC > CFLAGS > LDFLAGS > LIBS > -CPPFLAGS' > +CPPFLAGS > +CPP' > ac_subdirs_all=3D'aarch64 > arm > avr > @@ -1322,6 +1324,7 @@ Some influential environment variables: > LIBS libraries to pass to the linker, e.g. -l > CPPFLAGS (Objective) C/C++ preprocessor flags, e.g. -I= if > you have headers in a nonstandard directory > + CPP C preprocessor > =20 > Use these variables to override the choices made by `configure' or to he= lp > it to find libraries and programs with nonstandard names/locations. > @@ -1440,6 +1443,43 @@ fi > as_fn_set_status $ac_retval > =20 > } # ac_fn_c_try_compile > + > +# ac_fn_c_try_cpp LINENO > +# ---------------------- > +# Try to preprocess conftest.$ac_ext, and return whether this succeeded. > +ac_fn_c_try_cpp () > +{ > + as_lineno=3D${as_lineno-"$1"} as_lineno_stack=3Das_lineno_stack=3D$as_= lineno_stack > + if { { ac_try=3D"$ac_cpp conftest.$ac_ext" > +case "(($ac_try" in > + *\"* | *\`* | *\\*) ac_try_echo=3D\$ac_try;; > + *) ac_try_echo=3D$ac_try;; > +esac > +eval ac_try_echo=3D"\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\"" > +$as_echo "$ac_try_echo"; } >&5 > + (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err > + ac_status=3D$? > + if test -s conftest.err; then > + grep -v '^ *+' conftest.err >conftest.er1 > + cat conftest.er1 >&5 > + mv -f conftest.er1 conftest.err > + fi > + $as_echo "$as_me:${as_lineno-$LINENO}: \$? =3D $ac_status" >&5 > + test $ac_status =3D 0; } > conftest.i && { > + test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" || > + test ! -s conftest.err > + }; then : > + ac_retval=3D0 > +else > + $as_echo "$as_me: failed program was:" >&5 > +sed 's/^/| /' conftest.$ac_ext >&5 > + > + ac_retval=3D1 > +fi > + eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno > + as_fn_set_status $ac_retval > + > +} # ac_fn_c_try_cpp > cat >config.log <<_ACEOF > This file contains any messages produced by compilers while > running configure, to aid debugging if configure makes a mistake. > @@ -3552,6 +3592,143 @@ ac_compile=3D'$CC -c $CFLAGS $CPPFLAGS conftest.$= ac_ext >&5' > ac_link=3D'$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest= =2E$ac_ext $LIBS >&5' > ac_compiler_gnu=3D$ac_cv_c_compiler_gnu > =20 > +ac_ext=3Dc > +ac_cpp=3D'$CPP $CPPFLAGS' > +ac_compile=3D'$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' > +ac_link=3D'$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest= =2E$ac_ext $LIBS >&5' > +ac_compiler_gnu=3D$ac_cv_c_compiler_gnu > +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C prepr= ocessor" >&5 > +$as_echo_n "checking how to run the C preprocessor... " >&6; } > +# On Suns, sometimes $CPP names a directory. > +if test -n "$CPP" && test -d "$CPP"; then > + CPP=3D > +fi > +if test -z "$CPP"; then > + if ${ac_cv_prog_CPP+:} false; then : > + $as_echo_n "(cached) " >&6 > +else > + # Double quotes because CPP needs to be expanded > + for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp" > + do > + ac_preproc_ok=3Dfalse > +for ac_c_preproc_warn_flag in '' yes > +do > + # Use a header file that comes with gcc, so configuring glibc > + # with a fresh cross-compiler works. > + # Prefer to if __STDC__ is defined, since > + # exists even on freestanding compilers. > + # On the NeXT, cc -E runs the code through the compiler's parser, > + # not just through cpp. "Syntax error" is here to catch this case. > + cat confdefs.h - <<_ACEOF >conftest.$ac_ext > +/* end confdefs.h. */ > +#ifdef __STDC__ > +# include > +#else > +# include > +#endif > + Syntax error > +_ACEOF > +if ac_fn_c_try_cpp "$LINENO"; then : > + > +else > + # Broken: fails on valid input. > +continue > +fi > +rm -f conftest.err conftest.i conftest.$ac_ext > + > + # OK, works on sane cases. Now check whether nonexistent headers > + # can be detected and how. > + cat confdefs.h - <<_ACEOF >conftest.$ac_ext > +/* end confdefs.h. */ > +#include > +_ACEOF > +if ac_fn_c_try_cpp "$LINENO"; then : > + # Broken: success on invalid input. > +continue > +else > + # Passes both tests. > +ac_preproc_ok=3D: > +break > +fi > +rm -f conftest.err conftest.i conftest.$ac_ext > + > +done > +# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped. > +rm -f conftest.i conftest.err conftest.$ac_ext > +if $ac_preproc_ok; then : > + break > +fi > + > + done > + ac_cv_prog_CPP=3D$CPP > + > +fi > + CPP=3D$ac_cv_prog_CPP > +else > + ac_cv_prog_CPP=3D$CPP > +fi > +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5 > +$as_echo "$CPP" >&6; } > +ac_preproc_ok=3Dfalse > +for ac_c_preproc_warn_flag in '' yes > +do > + # Use a header file that comes with gcc, so configuring glibc > + # with a fresh cross-compiler works. > + # Prefer to if __STDC__ is defined, since > + # exists even on freestanding compilers. > + # On the NeXT, cc -E runs the code through the compiler's parser, > + # not just through cpp. "Syntax error" is here to catch this case. > + cat confdefs.h - <<_ACEOF >conftest.$ac_ext > +/* end confdefs.h. */ > +#ifdef __STDC__ > +# include > +#else > +# include > +#endif > + Syntax error > +_ACEOF > +if ac_fn_c_try_cpp "$LINENO"; then : > + > +else > + # Broken: fails on valid input. > +continue > +fi > +rm -f conftest.err conftest.i conftest.$ac_ext > + > + # OK, works on sane cases. Now check whether nonexistent headers > + # can be detected and how. > + cat confdefs.h - <<_ACEOF >conftest.$ac_ext > +/* end confdefs.h. */ > +#include > +_ACEOF > +if ac_fn_c_try_cpp "$LINENO"; then : > + # Broken: success on invalid input. > +continue > +else > + # Passes both tests. > +ac_preproc_ok=3D: > +break > +fi > +rm -f conftest.err conftest.i conftest.$ac_ext > + > +done > +# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped. > +rm -f conftest.i conftest.err conftest.$ac_ext > +if $ac_preproc_ok; then : > + > +else > + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 > +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} > +as_fn_error $? "C preprocessor \"$CPP\" fails sanity check > +See \`config.log' for more details" "$LINENO" 5; } > +fi > + > +ac_ext=3Dc > +ac_cpp=3D'$CPP $CPPFLAGS' > +ac_compile=3D'$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' > +ac_link=3D'$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest= =2E$ac_ext $LIBS >&5' > +ac_compiler_gnu=3D$ac_cv_c_compiler_gnu > + > =20 > =20 > AR=3D${AR-ar} > diff --git a/sim/configure.ac b/sim/configure.ac > index 7de8b99888bf..99364cac7f4e 100644 > --- a/sim/configure.ac > +++ b/sim/configure.ac > @@ -10,6 +10,7 @@ AC_CHECK_TOOL(RANLIB, ranlib, :) > AC_CANONICAL_SYSTEM > AC_ARG_PROGRAM > AC_PROG_CC > +AC_PROG_CPP > AC_SUBST(CFLAGS) > AC_SUBST(HDEFINES) > AR=3D${AR-ar} > --=20 > 2.28.0 >=20