linux-kernel - [PATCH v2 1/9] nds32: lib: To use generic lib instead of libgcc to prevent the symbol undefined issue.

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Message-Id: <2bfdc9653521e88140a366af3b6f91394c1adfef.1524229038.git.greentime@andestech.com>
Date:   Fri, 20 Apr 2018 21:31:07 +0800
From:   Greentime Hu <green.hu@...il.com>
To:     linux-kernel@...r.kernel.org, arnd@...db.de,
        greentime@...estech.com, green.hu@...il.com, private@...ck-us.net,
        hch@...radead.org, vincentc@...estech.com, nickhu@...estech.com
Subject: [PATCH v2 1/9] nds32: lib: To use generic lib instead of libgcc to prevent the symbol undefined issue.

We can use the generic lib to fix these error because the symbol of
libgcc in toolchain is not exported.

ERROR: "__ucmpdi2" [fs/xfs/xfs.ko] undefined!
ERROR: "__ashrdi3" [fs/xfs/xfs.ko] undefined!
ERROR: "__lshrdi3" [fs/xfs/xfs.ko] undefined!
ERROR: "__ashldi3" [fs/ntfs/ntfs.ko] undefined!
...

Signed-off-by: Greentime Hu <greentime@...estech.com>
Acked-by: Arnd Bergmann <arnd@...db.de>
---
 arch/nds32/Kconfig  | 6 ++++++
 arch/nds32/Makefile | 3 ---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/nds32/Kconfig b/arch/nds32/Kconfig
index 249f38d3388f..98e05f997f91 100644
--- a/arch/nds32/Kconfig
+++ b/arch/nds32/Kconfig
@@ -9,6 +9,12 @@ config NDS32
 	select CLKSRC_MMIO
 	select CLONE_BACKWARDS
 	select COMMON_CLK
+	select GENERIC_ASHLDI3
+	select GENERIC_ASHRDI3
+	select GENERIC_LSHRDI3
+	select GENERIC_CMPDI2
+	select GENERIC_MULDI3
+	select GENERIC_UCMPDI2
 	select GENERIC_ATOMIC64
 	select GENERIC_CPU_DEVICES
 	select GENERIC_CLOCKEVENTS
diff --git a/arch/nds32/Makefile b/arch/nds32/Makefile
index 91f933d5a962..20edf34e70ce 100644
--- a/arch/nds32/Makefile
+++ b/arch/nds32/Makefile
@@ -23,9 +23,6 @@ export	TEXTADDR
 # If we have a machine-specific directory, then include it in the build.
 core-y				+= arch/nds32/kernel/ arch/nds32/mm/
 libs-y				+= arch/nds32/lib/
-LIBGCC_PATH     		:= \
-  $(shell $(CC) $(KBUILD_CFLAGS) $(KCFLAGS) -print-libgcc-file-name)
-libs-y				+= $(LIBGCC_PATH)
 
 ifneq '$(CONFIG_NDS32_BUILTIN_DTB)' '""'
 BUILTIN_DTB := y
-- 
1.9.5