[PATCH] Config.mk: drop -Wdeclaration-after-statement

[Alexander Kanavin <alex@xxxxxxxxxxxxx>]

Such constructs are fully allowed by C99:
https://gcc.gnu.org/onlinedocs/gcc-12.2.0/gcc/Mixed-Labels-and-Declarations.html#Mixed-Labels-and-Declarations

If the flag is present, then building against python 3.12 will fail thusly:

| In file included from 
/srv/storage/alex/yocto/build-virt/tmp/work/core2-64-poky-linux/xen-tools/4.17+stable/recipe-sysroot/usr/include/python3.12/Python.h:44,
|                  from xen/lowlevel/xc/xc.c:8:
| 
/srv/storage/alex/yocto/build-virt/tmp/work/core2-64-poky-linux/xen-tools/4.17+stable/recipe-sysroot/usr/include/python3.12/object.h:
 In function 'Py_SIZE':
| 
/srv/storage/alex/yocto/build-virt/tmp/work/core2-64-poky-linux/xen-tools/4.17+stable/recipe-sysroot/usr/include/python3.12/object.h:233:5:
 error: ISO C90 forbids mixed declarations and code 
[-Werror=declaration-after-statement]
|   233 |     PyVarObject *var_ob = _PyVarObject_CAST(ob);
|       |     ^~~~~~~~~~~
| In file included from 
/srv/storage/alex/yocto/build-virt/tmp/work/core2-64-poky-linux/xen-tools/4.17+stable/recipe-sysroot/usr/include/python3.12/Python.h:53:
| 
/srv/storage/alex/yocto/build-virt/tmp/work/core2-64-poky-linux/xen-tools/4.17+stable/recipe-sysroot/usr/include/python3.12/cpython/longintrepr.h:
 In function '_PyLong_CompactValue':
| 
/srv/storage/alex/yocto/build-virt/tmp/work/core2-64-poky-linux/xen-tools/4.17+stable/recipe-sysroot/usr/include/python3.12/cpython/longintrepr.h:121:5:
 error: ISO C90 forbids mixed declarations and code 
[-Werror=declaration-after-statement]
|   121 |     Py_ssize_t sign = 1 - (op->long_value.lv_tag & _PyLong_SIGN_MASK);
|       |     ^~~~~~~~~~
| cc1: all warnings being treated as errors

Signed-off-by: Alexander Kanavin <alex@xxxxxxxxxxxxx>
---
 Config.mk | 2 --
 1 file changed, 2 deletions(-)

diff --git a/Config.mk b/Config.mk
index 2c43702958..7e67b91de2 100644
--- a/Config.mk
+++ b/Config.mk
@@ -177,8 +177,6 @@ CFLAGS += -std=gnu99
 
 CFLAGS += -Wall -Wstrict-prototypes
 
-$(call cc-option-add,HOSTCFLAGS,HOSTCC,-Wdeclaration-after-statement)
-$(call cc-option-add,CFLAGS,CC,-Wdeclaration-after-statement)
 $(call cc-option-add,CFLAGS,CC,-Wno-unused-but-set-variable)
 $(call cc-option-add,CFLAGS,CC,-Wno-unused-local-typedefs)
 
-- 
2.39.2