ntdll: Avoid using SOL_IPX to detect whether IPX is supported.

4.18+ Linux kernels remove support for IPX but keep SOL_IPX defined, which causes compilation errors as wine unconditionally uses IPX structures if this is the case. Instead check for IPX_MTU to determine IPX support as it is defined within the ipx.h header itself.

ntdll: Avoid using SOL_IPX to detect whether IPX is supported.
954bf9e0 · Billy Laws · Alexandre Julliard · a0534afa · 954bf9e0
Commit 954bf9e0 authored Jun 03, 2023 by Billy Laws Committed by Alexandre Julliard Jul 04, 2023
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socket.c dlls/ntdll/unix/socket.c +3 -2

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--- a/dlls/ntdll/unix/socket.c
+++ b/dlls/ntdll/unix/socket.c
@@ -45,6 +45,7 @@
 #ifdef HAVE_NETIPX_IPX_H
 # include <netipx/ipx.h>
+# define HAS_IPX
 #elif defined(HAVE_LINUX_IPX_H)
 # ifdef HAVE_ASM_TYPES_H
 #  include <asm/types.h>
@@ -53,8 +54,6 @@
 #  include <linux/types.h>
 # endif
 # include <linux/ipx.h>
-#endif
-#if defined(SOL_IPX) || defined(SO_DEFAULT_HEADERS)
 # define HAS_IPX
 #endif
@@ -2406,6 +2405,7 @@ NTSTATUS sock_ioctl( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc, void *apc
            break;
        }
+#ifdef HAS_IPX
 #ifdef SOL_IPX
        case IOCTL_AFD_WINE_GET_IPX_PTYPE:
            return do_getsockopt( handle, io, SOL_IPX, IPX_TYPE, out_buffer, out_size );
@@ -2444,6 +2444,7 @@ NTSTATUS sock_ioctl( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc, void *apc
            return do_setsockopt( handle, io, 0, SO_DEFAULT_HEADERS, &value, sizeof(value) );
        }
 #endif
+#endif
 #ifdef HAS_IRDA
 #define MAX_IRDA_DEVICES 10