fix build failed due to gcc-10

backport-tweak-for-gcc-10.patch

@@ -0,0 +1,83 @@
+From 8284530f4bd86a38b9867f847bd844f5d8d08e87 Mon Sep 17 00:00:00 2001
+From: Sergei Trofimovich <slyfox@gentoo.org>
+Date: Mon, 6 Apr 2020 23:46:03 +0100
+Subject: sys-boot/syslinux: tweak for gcc-10, bug #705730
+
+Closes: https://bugs.gentoo.org/705730
+Package-Manager: Portage-2.3.96, Repoman-2.3.22
+Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
+
+Reference:https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=8284530f4bd86a38b9867f847bd844f5d8d08e87
+https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=53c31ce51ace223e4439cde2b6b2a395e40ae9d5
+---
+ mk/com32.mk    | 1 +
+ mk/efi.mk      | 2 +-
+ mk/elf.mk      | 1 +
+ mk/embedded.mk | 1 +
+ mk/lib.mk      | 1 +
+ 5 files changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/mk/com32.mk b/mk/com32.mk
+index aeb8a2c..5ae14fe 100644
+--- a/mk/com32.mk
++++ b/mk/com32.mk
+@@ -47,6 +47,7 @@ GCCOPT += $(call gcc_ok,-falign-functions=0,-malign-functions=0)
+ GCCOPT += $(call gcc_ok,-falign-jumps=0,-malign-jumps=0)
+ GCCOPT += $(call gcc_ok,-falign-labels=0,-malign-labels=0)
+ GCCOPT += $(call gcc_ok,-falign-loops=0,-malign-loops=0)
++GCCOPT += $(call gcc_ok,-fcommon)
+ 
+ ifeq ($(FWCLASS),EFI)
+ GCCOPT += -mno-red-zone
+diff --git a/mk/efi.mk b/mk/efi.mk
+index f097ad2..a082bad 100644
+--- a/mk/efi.mk
++++ b/mk/efi.mk
+@@ -7,7 +7,7 @@ core = $(topdir)/core
+ # Set up architecture specifics; for cross compilation, set ARCH as apt
+ # gnuefi sets up architecture specifics in ia32 or x86_64 sub directories
+ # set up the LIBDIR and EFIINC for building for the appropriate architecture
+-GCCOPT := $(call gcc_ok,-fno-stack-protector,)
++GCCOPT := $(call gcc_ok,-fno-stack-protector,) $(call gcc_ok,-fcommon)
+ EFIINC = $(objdir)/include/efi
+ LIBDIR  = $(objdir)/lib
+ 
+diff --git a/mk/elf.mk b/mk/elf.mk
+index b46dbd0..7ac7600 100644
+--- a/mk/elf.mk
++++ b/mk/elf.mk
+@@ -42,6 +42,7 @@ GCCOPT += $(call gcc_ok,-falign-functions=0,-malign-functions=0)
+ GCCOPT += $(call gcc_ok,-falign-jumps=0,-malign-jumps=0)
+ GCCOPT += $(call gcc_ok,-falign-labels=0,-malign-labels=0)
+ GCCOPT += $(call gcc_ok,-falign-loops=0,-malign-loops=0)
++GCCOPT += $(call gcc_ok,-fcommon)
+ 
+ com32 = $(topdir)/com32
+ core = $(topdir)/core
+diff --git a/mk/embedded.mk b/mk/embedded.mk
+index 488dc0f..bfca1a8 100644
+--- a/mk/embedded.mk
++++ b/mk/embedded.mk
+@@ -51,6 +51,7 @@ GCCOPT    += $(call gcc_ok,-falign-jumps=0,-malign-jumps=0)
+ GCCOPT    += $(call gcc_ok,-falign-labels=0,-malign-labels=0)
+ GCCOPT    += $(call gcc_ok,-falign-loops=0,-malign-loops=0)
+ GCCOPT    += $(call gcc_ok,-fvisibility=hidden)
++GCCOPT    += $(call gcc_ok,-fcommon)
+ 
+ LIBGCC    := $(shell $(CC) $(GCCOPT) --print-libgcc)
+ 
+diff --git a/mk/lib.mk b/mk/lib.mk
+index 54f1fd5..baad194 100644
+--- a/mk/lib.mk
++++ b/mk/lib.mk
+@@ -28,6 +28,7 @@ GCCOPT += $(call gcc_ok,-falign-functions=0,-malign-functions=0)
+ GCCOPT += $(call gcc_ok,-falign-jumps=0,-malign-jumps=0)
+ GCCOPT += $(call gcc_ok,-falign-labels=0,-malign-labels=0)
+ GCCOPT += $(call gcc_ok,-falign-loops=0,-malign-loops=0)
++GCCOPT += $(call gcc_ok,-fcommon)
+ 
+ INCLUDE	= -I$(SRC)
+ STRIP	= strip --strip-all -R .comment -R .note
+-- 
+2.27.0
+

syslinux.spec

@@ -2,7 +2,7 @@
 
 Name:           syslinux
 Version:        6.04
-Release:        8
+Release:        9
 License:        GPLv2+
 Summary:        The Syslinux boot loader collection
 URL:            http://syslinux.zytor.com/wiki/index.php/The_Syslinux_Project
@@ -25,6 +25,7 @@ Patch0003:      0003-include-sysmacros-h.patch
 
 Patch0004:      backport-replace-builtin-strlen-that-appears-to-get-optimized.patch
 Patch0005:      backport-add-RPMOPTFLAGS-to-CFLAGS-for-some-stuff.patch
+Patch0006:      backport-tweak-for-gcc-10.patch
 
 %description
 The Syslinux Project covers lightweight bootloaders for MS-DOS FAT filesystems (SYSLINUX),
@@ -159,7 +160,10 @@ fi
 %{_datadir}/syslinux/efi64
 
 %changelog
-* Sat Jul 16 2021 hanhui<hanhui15@huawei.com> - 6.04-8
+* Fri Jul 30 2021 hanhui<hanhui15@huawei.com> - 6.04-9
+- fix build failed due to gcc-10
+
+* Fri Jul 16 2021 hanhui<hanhui15@huawei.com> - 6.04-8
 - solves the problem of compiling stuck
 
 * Sat Mar 20 2021 hanhui<hanhui15@huawei.com> - 6.04-7