configure: define _DEBUG for a debug build

Alexpux · lazka · commit e3d22cd2d009 · 2026-01-06T13:49:03.000+01:00
The Windows code expects it in some places for a debug build

Skip some things which fail to link with _DEBUG
diff --git a/Modules/_winapi.c b/Modules/_winapi.c
@@ -1491,7 +1491,7 @@ static PyObject *
 _winapi_ExitProcess_impl(PyObject *module, UINT ExitCode)
 /*[clinic end generated code: output=a387deb651175301 input=4f05466a9406c558]*/
 {
-    #if defined(Py_DEBUG)
+    #if defined(Py_DEBUG) && defined(_MSC_VER)
 #ifdef MS_WINDOWS_DESKTOP
         SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOALIGNMENTFAULTEXCEPT|
                      SEM_NOGPFAULTERRORBOX|SEM_NOOPENFILEERRORBOX);
diff --git a/PC/clinic/msvcrtmodule.c.h b/PC/clinic/msvcrtmodule.c.h
diff --git a/configure.ac b/configure.ac
@@ -2469,6 +2469,7 @@ _RESTORE_VAR([CFLAGS])
 PYDEBUG_CFLAGS="-O0"
 AS_VAR_IF([ac_cv_cc_supports_og], [yes],
           [PYDEBUG_CFLAGS="-Og"])
+PYDEBUG_CFLAGS="-D_DEBUG $PYDEBUG_CFLAGS"
 
 # tweak OPT based on compiler and platform, only if the user didn't set
 # it on the command line

Original file line number	Diff line number	Diff line change
`@@ -1491,7 +1491,7 @@ static PyObject *`
`1491`	`1491`	`_winapi_ExitProcess_impl(PyObject *module, UINT ExitCode)`
`1492`	`1492`	`/[clinic end generated code: output=a387deb651175301 input=4f05466a9406c558]/`
`1493`	`1493`	`{`
`1494`		`- #if defined(Py_DEBUG)`
	`1494`	`+ #if defined(Py_DEBUG) && defined(_MSC_VER)`
`1495`	`1495`	`#ifdef MS_WINDOWS_DESKTOP`
`1496`	`1496`	`SetErrorMode(SEM_FAILCRITICALERRORS\|SEM_NOALIGNMENTFAULTEXCEPT\|`
`1497`	`1497`	`SEM_NOGPFAULTERRORBOX\|SEM_NOOPENFILEERRORBOX);`