[PATCH v3 3/5] musl-legacy-error: Add recipe

[Khem Raj <raj.khem@gmail.com>]

This adds glibc error() API implementation which is needed by few
packages still.

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
v3: Added new

 meta/conf/distro/include/maintainers.inc      |  1 +
 meta/recipes-core/musl/musl-legacy-error.bb   | 26 ++++++++
 .../musl/musl-legacy-error/error.h            | 60 +++++++++++++++++++
 3 files changed, 87 insertions(+)
 create mode 100644 meta/recipes-core/musl/musl-legacy-error.bb
 create mode 100644 meta/recipes-core/musl/musl-legacy-error/error.h

diff --git a/meta/conf/distro/include/maintainers.inc b/meta/conf/distro/include/maintainers.inc
index e977c84fc82..f69f229fc85 100644
--- a/meta/conf/distro/include/maintainers.inc
+++ b/meta/conf/distro/include/maintainers.inc
@@ -531,6 +531,7 @@ RECIPE_MAINTAINER:pn-mtd-utils = "Denys Dmytriyenko <denis@denix.org>"
 RECIPE_MAINTAINER:pn-mtdev = "Anuj Mittal <anuj.mittal@intel.com>"
 RECIPE_MAINTAINER:pn-mtools = "Anuj Mittal <anuj.mittal@intel.com>"
 RECIPE_MAINTAINER:pn-musl = "Khem Raj <raj.khem@gmail.com>"
+RECIPE_MAINTAINER:pn-musl-legacy-error = "Khem Raj <raj.khem@gmail.com>"
 RECIPE_MAINTAINER:pn-musl-locales = "Khem Raj <raj.khem@gmail.com>"
 RECIPE_MAINTAINER:pn-musl-obstack = "Khem Raj <raj.khem@gmail.com>"
 RECIPE_MAINTAINER:pn-musl-utils = "Khem Raj <raj.khem@gmail.com>"
diff --git a/meta/recipes-core/musl/musl-legacy-error.bb b/meta/recipes-core/musl/musl-legacy-error.bb
new file mode 100644
index 00000000000..5ce5a233ab1
--- /dev/null
+++ b/meta/recipes-core/musl/musl-legacy-error.bb
@@ -0,0 +1,26 @@
+# Copyright (C) 2023 Khem Raj <raj.khem@gmail.com>
+# Released under the MIT license (see COPYING.MIT for the terms)
+
+SUMMARY = "error API GNU extention implementation"
+LICENSE = "BSD-2-Clause"
+LIC_FILES_CHKSUM = "file://error.h;beginline=1;md5=2ee396b23e8507fbf8f98af0471a77c6"
+SECTION = "devel"
+
+SRC_URI = "file://error.h"
+
+do_configure[noexec] = "1"
+do_compile[noexec] = "1"
+
+INHIBIT_DEFAULT_DEPS = "1"
+
+S = "${WORKDIR}"
+
+do_install() {
+	install -Dm 0644 ${S}/error.h -t ${D}${includedir}
+}
+#
+# We will skip parsing for non-musl systems
+#
+COMPATIBLE_HOST = ".*-musl.*"
+DEV_PKG_DEPENDENCY = ""
+RRECOMMENDS:${PN}-dbg = "${PN}-dev (= ${EXTENDPKGV})"
diff --git a/meta/recipes-core/musl/musl-legacy-error/error.h b/meta/recipes-core/musl/musl-legacy-error/error.h
new file mode 100644
index 00000000000..9a4e1f8d006
--- /dev/null
+++ b/meta/recipes-core/musl/musl-legacy-error/error.h
@@ -0,0 +1,60 @@
+#ifndef _ERROR_H_
+#define _ERROR_H_
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#warning usage of non-standard #include <error.h> is deprecated
+
+static unsigned int error_message_count = 0;
+
+static inline void error(int status, int errnum, const char* format, ...)
+{
+	/* should be fflush(stdout), but that's unspecified if stdout has been closed;
+	 * stick with fflush(NULL) for simplicity (glibc checks if the fd is still valid) */
+	fflush(NULL);
+
+	va_list ap;
+	fprintf(stderr, "%s: ", program_invocation_name);
+	va_start(ap, format);
+	vfprintf(stderr, format, ap);
+	va_end(ap);
+	if (errnum)
+		fprintf(stderr, ": %s", strerror(errnum));
+	fprintf(stderr, "\n");
+	error_message_count++;
+	if (status)
+		exit(status);
+}
+
+static int error_one_per_line = 0;
+
+static inline void error_at_line(int status, int errnum, const char *filename,
+		unsigned int linenum, const char *format, ...)
+{
+	va_list ap;
+	if (error_one_per_line) {
+		static const char *old_filename;
+		static int old_linenum;
+		if (linenum == old_linenum && filename == old_filename)
+			return;
+		old_filename = filename;
+		old_linenum = linenum;
+	}
+	fprintf(stderr, "%s: %s:%u: ", program_invocation_name, filename, linenum);
+	va_start(ap, format);
+	vfprintf(stderr, format, ap);
+	va_end(ap);
+	if (errnum)
+		fprintf(stderr, ": %s", strerror(errnum));
+	fprintf(stderr, "\n");
+	error_message_count++;
+	if (status)
+		exit(status);
+}
+
+
+#endif	/* _ERROR_H_ */
-- 
2.42.0