esac
- nw="$nw -Waggregate-return" # anachronistic
- nw="$nw -Wlong-long" # C90 is anachronistic
- nw="$nw -Wc++-compat" # We don't care about C++ compilers
- nw="$nw -Wundef" # Warns on '#if GNULIB_FOO' etc in gnulib
- nw="$nw -Wtraditional" # Warns on #elif which we use often
- nw="$nw -Wcast-qual" # Too many warnings for now
- nw="$nw -Wconversion" # Too many warnings for now
nw="$nw -Wsystem-headers" # Don't let system headers trigger warnings
- nw="$nw -Wsign-conversion" # Too many warnings for now
nw="$nw -Woverlength-strings" # Not a problem these days
- nw="$nw -Wtraditional-conversion" # Too many warnings for now
- nw="$nw -Wunreachable-code" # so buggy that it's now silently ignored
- nw="$nw -Wpadded" # Our structs are not padded
- nw="$nw -Wredundant-decls" # we regularly (re)declare functions
nw="$nw -Wlogical-op" # any use of fwrite provokes this
nw="$nw -Wformat-nonliteral" # we do this a lot
nw="$nw -Wvla" # warnings in gettext.h
nw="$nw -Wnested-externs" # use of XARGMATCH/verify_function__
- nw="$nw -Wswitch-enum" # Too many warnings for now
nw="$nw -Wswitch-default" # Too many warnings for now
- nw="$nw -Wfloat-equal" # warns about high-quality code
nw="$nw -Winline" # OK to ignore 'inline'
nw="$nw -Wjump-misses-init" # We sometimes safely jump over init.
nw="$nw -Wstrict-overflow" # OK to optimize assuming that
# The following line should be removable at some point.
nw="$nw -Wsuggest-attribute=pure"
+ # clang is unduly picky about some things.
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler is clang" >&5
+$as_echo_n "checking whether the compiler is clang... " >&6; }
+if test "${emacs_cv_clang+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+ #ifndef __clang__
+ #error "not clang"
+ #endif
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ emacs_cv_clang=yes
+else
+ emacs_cv_clang=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $emacs_cv_clang" >&5
+$as_echo "$emacs_cv_clang" >&6; }
+ if test $emacs_cv_clang = yes; then
+ nw="$nw -Wcast-align"
+ fi
+
if test -n "$GCC"; then
+ # More things that clang is unduly picky about.
+ if test $emacs_cv_clang = yes; then
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-format-extra-args" >&5
+$as_echo_n "checking whether C compiler handles -Wno-format-extra-args... " >&6; }
+if test "${gl_cv_warn_c__Wno_format_extra_args+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+
+ gl_save_compiler_FLAGS="$CFLAGS"
+ as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wno-format-extra-args"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ gl_cv_warn_c__Wno_format_extra_args=yes
+else
+ gl_cv_warn_c__Wno_format_extra_args=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_format_extra_args" >&5
+$as_echo "$gl_cv_warn_c__Wno_format_extra_args" >&6; }
+if test "x$gl_cv_warn_c__Wno_format_extra_args" = x""yes; then :
+ as_fn_append WARN_CFLAGS " -Wno-format-extra-args"
+fi
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-tautological-constant-out-of-range-compare" >&5
+$as_echo_n "checking whether C compiler handles -Wno-tautological-constant-out-of-range-compare... " >&6; }
+if test "${gl_cv_warn_c__Wno_tautological_constant_out_of_range_compare+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+
+ gl_save_compiler_FLAGS="$CFLAGS"
+ as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wno-tautological-constant-out-of-range-compare"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ gl_cv_warn_c__Wno_tautological_constant_out_of_range_compare=yes
+else
+ gl_cv_warn_c__Wno_tautological_constant_out_of_range_compare=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_tautological_constant_out_of_range_compare" >&5
+$as_echo "$gl_cv_warn_c__Wno_tautological_constant_out_of_range_compare" >&6; }
+if test "x$gl_cv_warn_c__Wno_tautological_constant_out_of_range_compare" = x""yes; then :
+ as_fn_append WARN_CFLAGS " -Wno-tautological-constant-out-of-range-compare"
+fi
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-unused-command-line-argument" >&5
+$as_echo_n "checking whether C compiler handles -Wno-unused-command-line-argument... " >&6; }
+if test "${gl_cv_warn_c__Wno_unused_command_line_argument+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+
+ gl_save_compiler_FLAGS="$CFLAGS"
+ as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wno-unused-command-line-argument"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ gl_cv_warn_c__Wno_unused_command_line_argument=yes
+else
+ gl_cv_warn_c__Wno_unused_command_line_argument=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_unused_command_line_argument" >&5
+$as_echo "$gl_cv_warn_c__Wno_unused_command_line_argument" >&6; }
+if test "x$gl_cv_warn_c__Wno_unused_command_line_argument" = x""yes; then :
+ as_fn_append WARN_CFLAGS " -Wno-unused-command-line-argument"
+fi
+
+
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -Wno-unused-value" >&5
+$as_echo_n "checking whether C compiler handles -Wno-unused-value... " >&6; }
+if test "${gl_cv_warn_c__Wno_unused_value+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+
+ gl_save_compiler_FLAGS="$CFLAGS"
+ as_fn_append CFLAGS " $gl_unknown_warnings_are_errors -Wno-unused-value"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ gl_cv_warn_c__Wno_unused_value=yes
+else
+ gl_cv_warn_c__Wno_unused_value=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS="$gl_save_compiler_FLAGS"
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_warn_c__Wno_unused_value" >&5
+$as_echo "$gl_cv_warn_c__Wno_unused_value" >&6; }
+if test "x$gl_cv_warn_c__Wno_unused_value" = x""yes; then :
+ as_fn_append WARN_CFLAGS " -Wno-unused-value"
+fi
+
+
+ fi
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler handles -fdiagnostics-show-option" >&5
$as_echo_n "checking whether C compiler handles -fdiagnostics-show-option... " >&6; }
USE_GTK_TOOLKIT="GTK3"
if test "x$ac_enable_gtk_deprecation_warnings" = x; then
GTK_CFLAGS="$GTK_CFLAGS -DGDK_DISABLE_DEPRECATION_WARNINGS"
+ GTK_CFLAGS="$GTK_CFLAGS -DGLIB_DISABLE_DEPRECATION_WARNINGS"
fi
else
check_gtk2=yes