kexec-tools: Fix build with GCC-14 on musl

(From OE-Core rev: 704f51f72c301bd081a635dbe94e52aa97ffb827)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 55 insertions, 0 deletions

diff --git a/meta/recipes-kernel/kexec/kexec-tools/0001-x86-linux-setup.c-Use-POSIX-basename-API.patch b/meta/recipes-kernel/kexec/kexec-tools/0001-x86-linux-setup.c-Use-POSIX-basename-API.patch
new file mode 100644
index 0000000000..e223f45998
--- /dev/null
+++ b/meta/recipes-kernel/kexec/kexec-tools/0001-x86-linux-setup.c-Use-POSIX-basename-API.patch
@@ -0,0 +1,54 @@
+From 32c8ffa7ace6f1b7e63f9ddffab00b00c36a7b57 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Wed, 15 May 2024 21:18:08 -0700
+Subject: [PATCH] x86-linux-setup.c: Use POSIX basename API
+
+Musl C library only supports POSIX basename function. while glibc has
+both GNU extention as well as POSIX basename implemented. Switch to
+using posix version, so it can work across musl and glibc
+
+basename prototype has been removed from string.h from latest musl [1]
+compilers e.g. clang-18/GCC-14 flags the absense of prototype as error.
+therefore include libgen.h for providing it.
+
+[1] https://git.musl-libc.org/cgit/musl/commit/?id=725e17ed6dff4d0cd22487bb64470881e86a92e7
+
+Upstream-Status: Submitted [https://lists.infradead.org/pipermail/kexec/2024-May/030034.html]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ kexec/arch/i386/x86-linux-setup.c | 9 ++++++---
+ 1 file changed, 6 insertions(+), 3 deletions(-)
+
+diff --git a/kexec/arch/i386/x86-linux-setup.c b/kexec/arch/i386/x86-linux-setup.c
+index 9a281dc..73251b9 100644
+--- a/kexec/arch/i386/x86-linux-setup.c
++++ b/kexec/arch/i386/x86-linux-setup.c
+@@ -14,6 +14,7 @@
+  *
+  */
+ #define _GNU_SOURCE
++#include <libgen.h>
+ #include <stdint.h>
+ #include <stdio.h>
+ #include <string.h>
+@@ -329,12 +330,14 @@ static int add_edd_entry(struct x86_linux_param_header *real_mode,
+        memset(edd_info, 0, sizeof(struct edd_info));
+ 
+        /* extract the device number */
+-       if (sscanf(basename(sysfs_name), "int13_dev%hhx", &devnum) != 1) {
++       char* sysfs_name_copy = strdup(sysfs_name);
++       if (sscanf(basename(sysfs_name_copy), "int13_dev%hhx", &devnum) != 1) {
+                fprintf(stderr, "Invalid format of int13_dev dir "
+-                               "entry: %s\n", basename(sysfs_name));
++                               "entry: %s\n", basename(sysfs_name_copy));
++               free(sysfs_name_copy);
+                return -1;
+        }
+-
++       free(sysfs_name_copy);
+        /* if there's a MBR signature, then add it */
+        if (file_scanf(sysfs_name, "mbr_signature", "0x%x", &mbr_sig) == 1) {
+                real_mode->edd_mbr_sig_buffer[*current_mbr] = mbr_sig;
+-- 
+2.45.1
+
diff --git a/meta/recipes-kernel/kexec/kexec-tools_2.0.28.bb b/meta/recipes-kernel/kexec/kexec-tools_2.0.28.bb
index c39fff834d..b60c51df4a 100644
--- a/meta/recipes-kernel/kexec/kexec-tools_2.0.28.bb
+++ b/meta/recipes-kernel/kexec/kexec-tools_2.0.28.bb
@@ -18,6 +18,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/utils/kernel/kexec/kexec-tools-${PV}.tar.gz
            file://0005-Disable-PIE-during-link.patch \
            file://0001-arm64-kexec-disabled-check-if-kaslr-seed-dtb-propert.patch \
            file://Fix-building-on-x86_64-with-binutils-2.41.patch \
+           file://0001-x86-linux-setup.c-Use-POSIX-basename-API.patch \
            "
 
 SRC_URI[sha256sum] = "f33d2660b3e38d25a127e87097978e0f7a9a73ab5151a29eb80974d169ff6a29"