sim: call SIM_AC_OPTION_WARNINGS(no) in remaining ports

We want all ports to opt into extra warnings as the default compiler
settings lets a lot slide.  Opt all the ports that haven't already in
to the warning system.  None of them build with -Werror, so disable
that by default.  Hopefully someone finds these important enough to
start fixing at some point.

3 files changed, 113 insertions, 2 deletions

diff --git a/sim/rl78/ChangeLog b/sim/rl78/ChangeLog
index ec31614..ddce236 100644
--- a/sim/rl78/ChangeLog
+++ b/sim/rl78/ChangeLog
@@ -1,5 +1,10 @@
 2021-01-11  Mike Frysinger  <vapier@gentoo.org>
 
+	* configure.ac: Call SIM_AC_OPTION_WARNINGS.
+	* configure: Regenerate.
+
+2021-01-11  Mike Frysinger  <vapier@gentoo.org>
+
 	* cpu.h (pc): Change to an extern.
 	* cpu.c (pc): Define.
 
diff --git a/sim/rl78/configure b/sim/rl78/configure
index 24de7d6..842091b 100755
--- a/sim/rl78/configure
+++ b/sim/rl78/configure
@@ -780,6 +780,9 @@ enable_sim_environment
 enable_sim_inline
 with_pkgversion
 with_bugurl
+enable_werror
+enable_build_warnings
+enable_sim_build_warnings
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1429,6 +1432,11 @@ Optional Features:
                           environment
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
+  --enable-werror         treat compile warnings as errors
+  --enable-build-warnings enable build-time compiler warnings if gcc is used
+  --enable-sim-build-warnings
+                          enable SIM specific build-time compiler warnings if
+                          gcc is used
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -12914,7 +12922,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12917 "configure"
+#line 12925 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -13020,7 +13028,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 13023 "configure"
+#line 13031 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -13571,6 +13579,103 @@ _ACEOF
 
 
 
+# Check whether --enable-werror was given.
+if test "${enable_werror+set}" = set; then :
+  enableval=$enable_werror; case "${enableval}" in
+     yes | y) ERROR_ON_WARNING="yes" ;;
+     no | n)  ERROR_ON_WARNING="no" ;;
+     *) as_fn_error $? "bad value ${enableval} for --enable-werror" "$LINENO" 5 ;;
+   esac
+fi
+
+
+# Enable -Werror by default when using gcc
+if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
+    ERROR_ON_WARNING=yes
+fi
+
+WERROR_CFLAGS=""
+
+build_warnings="-Wall -Wdeclaration-after-statement -Wpointer-arith \
+-Wpointer-sign \
+-Wno-unused -Wunused-value -Wunused-function \
+-Wno-switch -Wno-char-subscripts -Wmissing-prototypes
+-Wdeclaration-after-statement -Wempty-body -Wmissing-parameter-type \
+-Wold-style-declaration -Wold-style-definition"
+
+# Enable -Wno-format by default when using gcc on mingw since many
+# GCC versions complain about %I64.
+case "${host}" in
+  *-*-mingw32*) build_warnings="$build_warnings -Wno-format" ;;
+  *) build_warnings="$build_warnings -Wformat-nonliteral" ;;
+esac
+
+# Check whether --enable-build-warnings was given.
+if test "${enable_build_warnings+set}" = set; then :
+  enableval=$enable_build_warnings; case "${enableval}" in
+  yes)	;;
+  no)	build_warnings="-w";;
+  ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
+        build_warnings="${build_warnings} ${t}";;
+  *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
+        build_warnings="${t} ${build_warnings}";;
+  *)    build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+esac
+if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
+  echo "Setting compiler warning flags = $build_warnings" 6>&1
+fi
+fi
+# Check whether --enable-sim-build-warnings was given.
+if test "${enable_sim_build_warnings+set}" = set; then :
+  enableval=$enable_sim_build_warnings; case "${enableval}" in
+  yes)	;;
+  no)	build_warnings="-w";;
+  ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
+        build_warnings="${build_warnings} ${t}";;
+  *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
+        build_warnings="${t} ${build_warnings}";;
+  *)    build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
+esac
+if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
+  echo "Setting GDB specific compiler warning flags = $build_warnings" 6>&1
+fi
+fi
+WARN_CFLAGS=""
+if test "x${build_warnings}" != x -a "x$GCC" = xyes
+then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking compiler warning flags" >&5
+$as_echo_n "checking compiler warning flags... " >&6; }
+    # Separate out the -Werror flag as some files just cannot be
+    # compiled with it enabled.
+    for w in ${build_warnings}; do
+	case $w in
+	-Werr*) WERROR_CFLAGS=-Werror ;;
+	*) # Check that GCC accepts it
+	    saved_CFLAGS="$CFLAGS"
+	    CFLAGS="$CFLAGS $w"
+	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  WARN_CFLAGS="${WARN_CFLAGS} $w"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+	    CFLAGS="$saved_CFLAGS"
+	esac
+    done
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${WARN_CFLAGS} ${WERROR_CFLAGS}" >&5
+$as_echo "${WARN_CFLAGS} ${WERROR_CFLAGS}" >&6; }
+fi
+
+
 for ac_header in getopt.h
 do :
   ac_fn_c_check_header_mongrel "$LINENO" "getopt.h" "ac_cv_header_getopt_h" "$ac_includes_default"
diff --git a/sim/rl78/configure.ac b/sim/rl78/configure.ac
index b44d1da..65bb407 100644
--- a/sim/rl78/configure.ac
+++ b/sim/rl78/configure.ac
@@ -22,6 +22,7 @@ AC_INIT(Makefile.in)
 sinclude(../common/acinclude.m4)
 
 SIM_AC_COMMON
+SIM_AC_OPTION_WARNINGS(no)
 
 AC_CHECK_HEADERS(getopt.h)