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Get rid of "unknown option -Wno-invalid-source-encoding" warning when there

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is another warning being triggered.
-copy paste comment from configure.ac-
We check for the -Woption even though we are going to use -Wno-option.
This is due to the following (odd) gcc behavior:
"When an unrecognized warning option is requested (e.g.,
 -Wunknown-warning), GCC emits a diagnostic stating that the option is not
 recognized.  However, if the -Wno- form is used, the behavior is slightly
 different: no diagnostic is produced for -Wno-unknown-warning unless
 other diagnostics are being produced.  This allows the use of new -Wno-
 options with old compilers, but if something goes wrong, the compiler
 warns that an unrecognized option is present."
Since we don't want to use any unrecognized -Wno-option, we test for
-Woption instead.
This commit is contained in:
Bram Matthys
2019-03-27 13:44:29 +01:00
parent e7de6cf3a4
commit b2307af8ec
2 changed files with 183 additions and 171 deletions
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configure
Vendored
+162 -162
View File
@@ -5222,14 +5222,14 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-pointer-sign" >&5
$as_echo_n "checking whether C compiler accepts -Wno-pointer-sign... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_pointer_sign+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wpointer-sign" >&5
$as_echo_n "checking whether C compiler accepts -Wpointer-sign... " >&6; }
if ${ax_cv_check_cflags__Werror___Wpointer_sign+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-pointer-sign"
CFLAGS="$CFLAGS -Werror -Wpointer-sign"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5242,30 +5242,30 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_pointer_sign=yes
ax_cv_check_cflags__Werror___Wpointer_sign=yes
else
ax_cv_check_cflags__Werror___Wno_pointer_sign=no
ax_cv_check_cflags__Werror___Wpointer_sign=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_pointer_sign" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_pointer_sign" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_pointer_sign" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wpointer_sign" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wpointer_sign" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wpointer_sign" = xyes; then :
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-pointer-sign" >&5
$as_echo_n "checking whether C compiler accepts -Wno-pointer-sign... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_pointer_sign+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wpointer-sign" >&5
$as_echo_n "checking whether C compiler accepts -Wpointer-sign... " >&6; }
if ${ax_cv_check_cflags__Werror___Wpointer_sign+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-pointer-sign"
CFLAGS="$CFLAGS -Werror -Wpointer-sign"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5278,16 +5278,16 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_pointer_sign=yes
ax_cv_check_cflags__Werror___Wpointer_sign=yes
else
ax_cv_check_cflags__Werror___Wno_pointer_sign=no
ax_cv_check_cflags__Werror___Wpointer_sign=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_pointer_sign" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_pointer_sign" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_pointer_sign" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wpointer_sign" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wpointer_sign" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wpointer_sign" = xyes; then :
CFLAGS="$CFLAGS -Wno-pointer-sign"
else
:
@@ -5316,14 +5316,14 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-invalid-source-encoding" >&5
$as_echo_n "checking whether C compiler accepts -Wno-invalid-source-encoding... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_invalid_source_encoding+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Winvalid-source-encoding" >&5
$as_echo_n "checking whether C compiler accepts -Winvalid-source-encoding... " >&6; }
if ${ax_cv_check_cflags__Werror___Winvalid_source_encoding+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-invalid-source-encoding"
CFLAGS="$CFLAGS -Werror -Winvalid-source-encoding"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5336,30 +5336,30 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_invalid_source_encoding=yes
ax_cv_check_cflags__Werror___Winvalid_source_encoding=yes
else
ax_cv_check_cflags__Werror___Wno_invalid_source_encoding=no
ax_cv_check_cflags__Werror___Winvalid_source_encoding=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_invalid_source_encoding" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_invalid_source_encoding" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_invalid_source_encoding" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Winvalid_source_encoding" >&5
$as_echo "$ax_cv_check_cflags__Werror___Winvalid_source_encoding" >&6; }
if test x"$ax_cv_check_cflags__Werror___Winvalid_source_encoding" = xyes; then :
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-invalid-source-encoding" >&5
$as_echo_n "checking whether C compiler accepts -Wno-invalid-source-encoding... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_invalid_source_encoding+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Winvalid-source-encoding" >&5
$as_echo_n "checking whether C compiler accepts -Winvalid-source-encoding... " >&6; }
if ${ax_cv_check_cflags__Werror___Winvalid_source_encoding+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-invalid-source-encoding"
CFLAGS="$CFLAGS -Werror -Winvalid-source-encoding"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5372,16 +5372,16 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_invalid_source_encoding=yes
ax_cv_check_cflags__Werror___Winvalid_source_encoding=yes
else
ax_cv_check_cflags__Werror___Wno_invalid_source_encoding=no
ax_cv_check_cflags__Werror___Winvalid_source_encoding=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_invalid_source_encoding" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_invalid_source_encoding" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_invalid_source_encoding" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Winvalid_source_encoding" >&5
$as_echo "$ax_cv_check_cflags__Werror___Winvalid_source_encoding" >&6; }
if test x"$ax_cv_check_cflags__Werror___Winvalid_source_encoding" = xyes; then :
CFLAGS="$CFLAGS -Wno-invalid-source-encoding"
else
:
@@ -5410,14 +5410,14 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-format-zero-length" >&5
$as_echo_n "checking whether C compiler accepts -Wno-format-zero-length... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_format_zero_length+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wformat-zero-length" >&5
$as_echo_n "checking whether C compiler accepts -Wformat-zero-length... " >&6; }
if ${ax_cv_check_cflags__Werror___Wformat_zero_length+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-format-zero-length"
CFLAGS="$CFLAGS -Werror -Wformat-zero-length"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5430,30 +5430,30 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_format_zero_length=yes
ax_cv_check_cflags__Werror___Wformat_zero_length=yes
else
ax_cv_check_cflags__Werror___Wno_format_zero_length=no
ax_cv_check_cflags__Werror___Wformat_zero_length=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_format_zero_length" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_format_zero_length" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_format_zero_length" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wformat_zero_length" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wformat_zero_length" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wformat_zero_length" = xyes; then :
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-format-zero-length" >&5
$as_echo_n "checking whether C compiler accepts -Wno-format-zero-length... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_format_zero_length+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wformat-zero-length" >&5
$as_echo_n "checking whether C compiler accepts -Wformat-zero-length... " >&6; }
if ${ax_cv_check_cflags__Werror___Wformat_zero_length+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-format-zero-length"
CFLAGS="$CFLAGS -Werror -Wformat-zero-length"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5466,16 +5466,16 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_format_zero_length=yes
ax_cv_check_cflags__Werror___Wformat_zero_length=yes
else
ax_cv_check_cflags__Werror___Wno_format_zero_length=no
ax_cv_check_cflags__Werror___Wformat_zero_length=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_format_zero_length" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_format_zero_length" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_format_zero_length" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wformat_zero_length" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wformat_zero_length" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wformat_zero_length" = xyes; then :
CFLAGS="$CFLAGS -Wno-format-zero-length"
else
:
@@ -5504,14 +5504,14 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-format-truncation" >&5
$as_echo_n "checking whether C compiler accepts -Wno-format-truncation... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_format_truncation+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wformat-truncation" >&5
$as_echo_n "checking whether C compiler accepts -Wformat-truncation... " >&6; }
if ${ax_cv_check_cflags__Werror___Wformat_truncation+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-format-truncation"
CFLAGS="$CFLAGS -Werror -Wformat-truncation"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5524,30 +5524,30 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_format_truncation=yes
ax_cv_check_cflags__Werror___Wformat_truncation=yes
else
ax_cv_check_cflags__Werror___Wno_format_truncation=no
ax_cv_check_cflags__Werror___Wformat_truncation=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_format_truncation" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_format_truncation" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_format_truncation" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wformat_truncation" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wformat_truncation" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wformat_truncation" = xyes; then :
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-format-truncation" >&5
$as_echo_n "checking whether C compiler accepts -Wno-format-truncation... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_format_truncation+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wformat-truncation" >&5
$as_echo_n "checking whether C compiler accepts -Wformat-truncation... " >&6; }
if ${ax_cv_check_cflags__Werror___Wformat_truncation+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-format-truncation"
CFLAGS="$CFLAGS -Werror -Wformat-truncation"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5560,16 +5560,16 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_format_truncation=yes
ax_cv_check_cflags__Werror___Wformat_truncation=yes
else
ax_cv_check_cflags__Werror___Wno_format_truncation=no
ax_cv_check_cflags__Werror___Wformat_truncation=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_format_truncation" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_format_truncation" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_format_truncation" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wformat_truncation" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wformat_truncation" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wformat_truncation" = xyes; then :
CFLAGS="$CFLAGS -Wno-format-truncation"
else
:
@@ -5598,14 +5598,14 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-unused" >&5
$as_echo_n "checking whether C compiler accepts -Wno-unused... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_unused+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wunused" >&5
$as_echo_n "checking whether C compiler accepts -Wunused... " >&6; }
if ${ax_cv_check_cflags__Werror___Wunused+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-unused"
CFLAGS="$CFLAGS -Werror -Wunused"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5618,30 +5618,30 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_unused=yes
ax_cv_check_cflags__Werror___Wunused=yes
else
ax_cv_check_cflags__Werror___Wno_unused=no
ax_cv_check_cflags__Werror___Wunused=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_unused" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_unused" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_unused" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wunused" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wunused" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wunused" = xyes; then :
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-unused" >&5
$as_echo_n "checking whether C compiler accepts -Wno-unused... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_unused+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wunused" >&5
$as_echo_n "checking whether C compiler accepts -Wunused... " >&6; }
if ${ax_cv_check_cflags__Werror___Wunused+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-unused"
CFLAGS="$CFLAGS -Werror -Wunused"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5654,16 +5654,16 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_unused=yes
ax_cv_check_cflags__Werror___Wunused=yes
else
ax_cv_check_cflags__Werror___Wno_unused=no
ax_cv_check_cflags__Werror___Wunused=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_unused" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_unused" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_unused" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wunused" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wunused" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wunused" = xyes; then :
CFLAGS="$CFLAGS -Wno-unused"
else
:
@@ -5691,14 +5691,14 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-unused-parameter" >&5
$as_echo_n "checking whether C compiler accepts -Wno-unused-parameter... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_unused_parameter+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wunused-parameter" >&5
$as_echo_n "checking whether C compiler accepts -Wunused-parameter... " >&6; }
if ${ax_cv_check_cflags__Werror___Wunused_parameter+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-unused-parameter"
CFLAGS="$CFLAGS -Werror -Wunused-parameter"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5711,30 +5711,30 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_unused_parameter=yes
ax_cv_check_cflags__Werror___Wunused_parameter=yes
else
ax_cv_check_cflags__Werror___Wno_unused_parameter=no
ax_cv_check_cflags__Werror___Wunused_parameter=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_unused_parameter" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_unused_parameter" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_unused_parameter" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wunused_parameter" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wunused_parameter" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wunused_parameter" = xyes; then :
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-unused-parameter" >&5
$as_echo_n "checking whether C compiler accepts -Wno-unused-parameter... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_unused_parameter+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wunused-parameter" >&5
$as_echo_n "checking whether C compiler accepts -Wunused-parameter... " >&6; }
if ${ax_cv_check_cflags__Werror___Wunused_parameter+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-unused-parameter"
CFLAGS="$CFLAGS -Werror -Wunused-parameter"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5747,16 +5747,16 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_unused_parameter=yes
ax_cv_check_cflags__Werror___Wunused_parameter=yes
else
ax_cv_check_cflags__Werror___Wno_unused_parameter=no
ax_cv_check_cflags__Werror___Wunused_parameter=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_unused_parameter" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_unused_parameter" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_unused_parameter" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wunused_parameter" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wunused_parameter" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wunused_parameter" = xyes; then :
CFLAGS="$CFLAGS -Wno-unused-parameter"
else
:
@@ -5785,14 +5785,14 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-char-subscripts" >&5
$as_echo_n "checking whether C compiler accepts -Wno-char-subscripts... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_char_subscripts+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wchar-subscripts" >&5
$as_echo_n "checking whether C compiler accepts -Wchar-subscripts... " >&6; }
if ${ax_cv_check_cflags__Werror___Wchar_subscripts+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-char-subscripts"
CFLAGS="$CFLAGS -Werror -Wchar-subscripts"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5805,30 +5805,30 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_char_subscripts=yes
ax_cv_check_cflags__Werror___Wchar_subscripts=yes
else
ax_cv_check_cflags__Werror___Wno_char_subscripts=no
ax_cv_check_cflags__Werror___Wchar_subscripts=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_char_subscripts" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_char_subscripts" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_char_subscripts" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wchar_subscripts" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wchar_subscripts" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wchar_subscripts" = xyes; then :
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-char-subscripts" >&5
$as_echo_n "checking whether C compiler accepts -Wno-char-subscripts... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_char_subscripts+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wchar-subscripts" >&5
$as_echo_n "checking whether C compiler accepts -Wchar-subscripts... " >&6; }
if ${ax_cv_check_cflags__Werror___Wchar_subscripts+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-char-subscripts"
CFLAGS="$CFLAGS -Werror -Wchar-subscripts"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5841,16 +5841,16 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_char_subscripts=yes
ax_cv_check_cflags__Werror___Wchar_subscripts=yes
else
ax_cv_check_cflags__Werror___Wno_char_subscripts=no
ax_cv_check_cflags__Werror___Wchar_subscripts=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_char_subscripts" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_char_subscripts" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_char_subscripts" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wchar_subscripts" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wchar_subscripts" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wchar_subscripts" = xyes; then :
CFLAGS="$CFLAGS -Wno-char-subscripts"
else
:
@@ -5879,14 +5879,14 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-sign-compare" >&5
$as_echo_n "checking whether C compiler accepts -Wno-sign-compare... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_sign_compare+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wsign-compare" >&5
$as_echo_n "checking whether C compiler accepts -Wsign-compare... " >&6; }
if ${ax_cv_check_cflags__Werror___Wsign_compare+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-sign-compare"
CFLAGS="$CFLAGS -Werror -Wsign-compare"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5899,30 +5899,30 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_sign_compare=yes
ax_cv_check_cflags__Werror___Wsign_compare=yes
else
ax_cv_check_cflags__Werror___Wno_sign_compare=no
ax_cv_check_cflags__Werror___Wsign_compare=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_sign_compare" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_sign_compare" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_sign_compare" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wsign_compare" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wsign_compare" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wsign_compare" = xyes; then :
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-sign-compare" >&5
$as_echo_n "checking whether C compiler accepts -Wno-sign-compare... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_sign_compare+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wsign-compare" >&5
$as_echo_n "checking whether C compiler accepts -Wsign-compare... " >&6; }
if ${ax_cv_check_cflags__Werror___Wsign_compare+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-sign-compare"
CFLAGS="$CFLAGS -Werror -Wsign-compare"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5935,16 +5935,16 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_sign_compare=yes
ax_cv_check_cflags__Werror___Wsign_compare=yes
else
ax_cv_check_cflags__Werror___Wno_sign_compare=no
ax_cv_check_cflags__Werror___Wsign_compare=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_sign_compare" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_sign_compare" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_sign_compare" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wsign_compare" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wsign_compare" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wsign_compare" = xyes; then :
CFLAGS="$CFLAGS -Wno-sign-compare"
else
:
@@ -5973,14 +5973,14 @@ ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-address" >&5
$as_echo_n "checking whether C compiler accepts -Wno-address... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_address+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Waddress" >&5
$as_echo_n "checking whether C compiler accepts -Waddress... " >&6; }
if ${ax_cv_check_cflags__Werror___Waddress+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-address"
CFLAGS="$CFLAGS -Werror -Waddress"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -5993,30 +5993,30 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_address=yes
ax_cv_check_cflags__Werror___Waddress=yes
else
ax_cv_check_cflags__Werror___Wno_address=no
ax_cv_check_cflags__Werror___Waddress=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_address" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_address" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_address" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Waddress" >&5
$as_echo "$ax_cv_check_cflags__Werror___Waddress" >&6; }
if test x"$ax_cv_check_cflags__Werror___Waddress" = xyes; then :
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wno-address" >&5
$as_echo_n "checking whether C compiler accepts -Wno-address... " >&6; }
if ${ax_cv_check_cflags__Werror___Wno_address+:} false; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Waddress" >&5
$as_echo_n "checking whether C compiler accepts -Waddress... " >&6; }
if ${ax_cv_check_cflags__Werror___Waddress+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wno-address"
CFLAGS="$CFLAGS -Werror -Waddress"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -6029,16 +6029,16 @@ main ()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wno_address=yes
ax_cv_check_cflags__Werror___Waddress=yes
else
ax_cv_check_cflags__Werror___Wno_address=no
ax_cv_check_cflags__Werror___Waddress=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wno_address" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wno_address" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wno_address" = xyes; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Waddress" >&5
$as_echo "$ax_cv_check_cflags__Werror___Waddress" >&6; }
if test x"$ax_cv_check_cflags__Werror___Waddress" = xyes; then :
CFLAGS="$CFLAGS -Wno-address"
else
:
configure.ac
+21 -9
View File
@@ -177,38 +177,50 @@ check_cc_cxx_flag([-Wduplicated-cond], [CFLAGS="$CFLAGS -Wduplicated-cond"])
check_cc_cxx_flag([-Wduplicated-branches], [CFLAGS="$CFLAGS -Wduplicated-branches"])
dnl And now to filter out certain warnings:
dnl [!] NOTE REGARDING THE check_cc_cxx_flag used by these:
dnl We check for the -Woption even though we are going to use -Wno-option.
dnl This is due to the following (odd) gcc behavior:
dnl "When an unrecognized warning option is requested (e.g.,
dnl -Wunknown-warning), GCC emits a diagnostic stating that the option is not
dnl recognized. However, if the -Wno- form is used, the behavior is slightly
dnl different: no diagnostic is produced for -Wno-unknown-warning unless
dnl other diagnostics are being produced. This allows the use of new -Wno-
dnl options with old compilers, but if something goes wrong, the compiler
dnl warns that an unrecognized option is present."
dnl Since we don't want to use any unrecognized -Wno-option, we test for
dnl -Woption instead.
dnl Pointer signedness warnings are really a pain and 99.9% of the time
dnl they are of absolutely no use whatsoever. IMO the person who decided
dnl to enable this without -Wall should be shot on sight.
check_cc_cxx_flag([-Wno-pointer-sign], [CFLAGS="$CFLAGS -Wno-pointer-sign"])
check_cc_cxx_flag([-Wpointer-sign], [CFLAGS="$CFLAGS -Wno-pointer-sign"])
dnl This is purely for charsys.c... I like it so we can easily read
dnl this for non-utf8. We can remove it once we ditch non-utf8 some day
dnl of course, or decide to ignore me and encode them.
check_cc_cxx_flag([-Wno-invalid-source-encoding], [CFLAGS="$CFLAGS -Wno-invalid-source-encoding"])
check_cc_cxx_flag([-Winvalid-source-encoding], [CFLAGS="$CFLAGS -Wno-invalid-source-encoding"])
check_cc_cxx_flag([-Wno-format-zero-length], [CFLAGS="$CFLAGS -Wno-format-zero-length"])
check_cc_cxx_flag([-Wformat-zero-length], [CFLAGS="$CFLAGS -Wno-format-zero-length"])
check_cc_cxx_flag([-Wno-format-truncation], [CFLAGS="$CFLAGS -Wno-format-truncation"])
check_cc_cxx_flag([-Wformat-truncation], [CFLAGS="$CFLAGS -Wno-format-truncation"])
dnl While it can be useful to occasionally to compile with warnings about
dnl unused variables and parameters, we often 'think ahead' when coding things
dnl so they may be useless now but not later. Similarly, for variables, we
dnl don't always care about a variable that may still be present in a build
dnl without DEBUGMODE. Unused variables are optimized out anyway.
check_cc_cxx_flag([-Wno-unused], [CFLAGS="$CFLAGS -Wno-unused"])
check_cc_cxx_flag([-Wno-unused-parameter], [CFLAGS="$CFLAGS -Wno-unused-parameter"])
check_cc_cxx_flag([-Wunused], [CFLAGS="$CFLAGS -Wno-unused"])
check_cc_cxx_flag([-Wunused-parameter], [CFLAGS="$CFLAGS -Wno-unused-parameter"])
dnl We use this and this warning is meaningless since 'char' is always unsigned
dnl in UnrealIRCd compiles (-funsigned-char).
check_cc_cxx_flag([-Wno-char-subscripts], [CFLAGS="$CFLAGS -Wno-char-subscripts"])
check_cc_cxx_flag([-Wchar-subscripts], [CFLAGS="$CFLAGS -Wno-char-subscripts"])
check_cc_cxx_flag([-Wno-sign-compare], [CFLAGS="$CFLAGS -Wno-sign-compare"])
check_cc_cxx_flag([-Wsign-compare], [CFLAGS="$CFLAGS -Wno-sign-compare"])
dnl This one fails with ircstrdup(var, staticstring)
dnl Shame we have to turn it off completely...
check_cc_cxx_flag([-Wno-address], [CFLAGS="$CFLAGS -Wno-address"])
check_cc_cxx_flag([-Waddress], [CFLAGS="$CFLAGS -Wno-address"])
dnl End of -W... compiler checks.