git: e8019a159185 - main - cross-build: provide exterr.h and sys/exterrvar.h for non-FreeBSD hosts

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=e8019a15918596d8c5e9d15378edf223caffda58

commit e8019a15918596d8c5e9d15378edf223caffda58
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2025-07-08 22:34:28 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2025-07-10 20:55:41 +0000

    cross-build: provide exterr.h and sys/exterrvar.h for non-FreeBSD hosts
    
    with enough glue to make libc/gen/err.c compilable.
    
    Reported by:    jhb
    Reviewed by:    jhb, jrtc27
    Sponsored by:   The FreeBSD Foundation
    Differential revision:  https://reviews.freebsd.org/D51217
---
 tools/build/cross-build/include/common/exterr.h        | 14 ++++++++++++++
 tools/build/cross-build/include/common/sys/exterrvar.h |  6 ++++++
 2 files changed, 20 insertions(+)

diff --git a/tools/build/cross-build/include/common/exterr.h b/tools/build/cross-build/include/common/exterr.h
new file mode 100644
index 000000000000..62482841c7b2
--- /dev/null
+++ b/tools/build/cross-build/include/common/exterr.h
@@ -0,0 +1,14 @@
+#ifndef _EXTERR_H_
+#define _EXTERR_H_
+
+#include <sys/types.h>
+
+static inline int
+uexterr_gettext(char *buf, size_t bufsz)
+{
+	if (bufsz > 0)
+		buf[0] = '\0';
+	return (0);
+}
+
+#endif
diff --git a/tools/build/cross-build/include/common/sys/exterrvar.h b/tools/build/cross-build/include/common/sys/exterrvar.h
new file mode 100644
index 000000000000..0ba821aadef2
--- /dev/null
+++ b/tools/build/cross-build/include/common/sys/exterrvar.h
@@ -0,0 +1,6 @@
+#ifndef _SYS_EXTERRVAR_H_
+#define _SYS_EXTERRVAR_H_
+
+#define	UEXTERROR_MAXLEN	256
+
+#endif