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sim: sync build_warnings handling with gdb 

The sim code gets the logic for SIM_AC_OPTION_WARNINGS from gdb, but
it hasn't been updated in a good long while.  Sync with the latest
gdb code.

There is a sim specific change in here: we disable -Werror for now.
This is because all sim code atm contains warnings.  Will probably
have to slowly add a white list of targets which can tolerate this
until everyone is updated.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2012-03-23 03:27:44 +00:00
parent 51dc010c5a
commit ac0aacdffa
2 changed files with 44 additions and 26 deletions
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6
sim/common/ChangeLog
View File

@ -1,3 +1,9 @@
2012-03-22 Mike Frysinger <vapier@gentoo.org>
* acinclude.m4 (SIM_AC_OPTION_WARNINGS): Copy AC_ARG_ENABLE(werror),
WERROR_CFLAGS, and build_warnings from gdb/configure.ac. Comment
out -Werror initialization.
2012-03-19 Mike Frysinger <vapier@gentoo.org>
* Make-common.in (TAGS): Change a-z to [:lower:].

64
sim/common/acinclude.m4
View File

@ -816,31 +816,44 @@ dnl --enable-build-warnings is for developers of the simulator.
dnl it enables extra GCC specific warnings.
AC_DEFUN([SIM_AC_OPTION_WARNINGS],
[
# NOTE: Don't add -Wall or -Wunused, they both include
# -Wunused-parameter which reports bogus warnings.
# NOTE: If you add to this list, remember to update
# gdb/doc/gdbint.texinfo.
build_warnings="-Wimplicit -Wreturn-type -Wcomment -Wtrigraphs \
-Wformat -Wparentheses -Wpointer-arith"
# GCC supports -Wuninitialized only with -O or -On, n != 0.
if test x${CFLAGS+set} = xset; then
case "${CFLAGS}" in
*"-O0"* ) ;;
*"-O"* )
build_warnings="${build_warnings} -Wuninitialized"
;;
esac
else
build_warnings="${build_warnings} -Wuninitialized"
AC_ARG_ENABLE(werror,
AS_HELP_STRING([--enable-werror], [treat compile warnings as errors]),
[case "${enableval}" in
yes | y) ERROR_ON_WARNING="yes" ;;
no | n) ERROR_ON_WARNING="no" ;;
*) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
esac])
# Enable -Werror by default when using gcc
if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
ERROR_ON_WARNING=yes
fi
# Up for debate: -Wswitch -Wcomment -trigraphs -Wtrigraphs
# -Wunused-function -Wunused-label -Wunused-variable -Wunused-value
# -Wchar-subscripts -Wtraditional -Wshadow -Wcast-qual
# -Wcast-align -Wwrite-strings -Wconversion -Wstrict-prototypes
# -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls
# -Woverloaded-virtual -Winline -Werror"
WERROR_CFLAGS=""
if test "${ERROR_ON_WARNING}" = yes ; then
# NOTE: Disabled in the sim dir due to most sims generating warnings.
# WERROR_CFLAGS="-Werror"
true
fi
# The entries after -Wno-pointer-sign are disabled warnings which may
# be enabled in the future, which can not currently be used to build
# GDB.
# NOTE: If you change this list, remember to update
# gdb/doc/gdbint.texinfo.
build_warnings="-Wall -Wdeclaration-after-statement -Wpointer-arith \
-Wformat-nonliteral -Wno-pointer-sign \
-Wno-unused -Wunused-value -Wunused-function \
-Wno-switch -Wno-char-subscripts -Wmissing-prototypes"
# 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" ;;
esac
AC_ARG_ENABLE(build-warnings,
[ --enable-build-warnings Enable build-time compiler warnings if gcc is used],
AS_HELP_STRING([--enable-build-warnings], [enable build-time compiler warnings if gcc is used]),
[case "${enableval}" in
yes) ;;
no) build_warnings="-w";;
@ -854,7 +867,7 @@ if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
echo "Setting compiler warning flags = $build_warnings" 6>&1
fi])dnl
AC_ARG_ENABLE(sim-build-warnings,
[ --enable-gdb-build-warnings Enable SIM specific build-time compiler warnings if gcc is used],
AS_HELP_STRING([--enable-sim-build-warnings], [enable SIM specific build-time compiler warnings if gcc is used]),
[case "${enableval}" in
yes) ;;
no) build_warnings="-w";;
@ -868,7 +881,6 @@ if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
echo "Setting GDB specific compiler warning flags = $build_warnings" 6>&1
fi])dnl
WARN_CFLAGS=""
WERROR_CFLAGS=""
if test "x${build_warnings}" != x -a "x$GCC" = xyes
then
AC_MSG_CHECKING(compiler warning flags)
@ -884,7 +896,7 @@ then
CFLAGS="$saved_CFLAGS"
esac
done
AC_MSG_RESULT(${WARN_CFLAGS}${WERROR_CFLAGS})
AC_MSG_RESULT(${WARN_CFLAGS} ${WERROR_CFLAGS})
fi
])
AC_SUBST(WARN_CFLAGS)