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author | Alexey Brodkin <abrodkin@synopsys.com> | 2018-06-01 14:34:33 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-24 13:26:53 +0200 |
commit | 97aaf73394cce0cf85c393c2a5e1d9ad6ddb2245 (patch) | |
tree | 33854f5ee4e7feeb3468ade45a38c148f37db02f /include | |
parent | 78f654f6cce3442937b8c7eb4b640357871363c1 (diff) |
ARC: Explicitly add -mmedium-calls to CFLAGS
[ Upstream commit 74c11e300c103af47db5b658fdcf28002421e250 ]
GCC built for arc*-*-linux has "-mmedium-calls" implicitly enabled by default
thus we don't see any problems during Linux kernel compilation.
----------------------------->8------------------------
arc-linux-gcc -mcpu=arc700 -Q --help=target | grep calls
-mlong-calls [disabled]
-mmedium-calls [enabled]
----------------------------->8------------------------
But if we try to use so-called Elf32 toolchain with GCC configured for
arc*-*-elf* then we'd see the following failure:
----------------------------->8------------------------
init/do_mounts.o: In function 'init_rootfs':
do_mounts.c:(.init.text+0x108): relocation truncated to fit: R_ARC_S21W_PCREL
against symbol 'unregister_filesystem' defined in .text section in fs/filesystems.o
arc-elf32-ld: final link failed: Symbol needs debug section which does not exist
make: *** [vmlinux] Error 1
----------------------------->8------------------------
That happens because neither "-mmedium-calls" nor "-mlong-calls" are enabled in
Elf32 GCC:
----------------------------->8------------------------
arc-elf32-gcc -mcpu=arc700 -Q --help=target | grep calls
-mlong-calls [disabled]
-mmedium-calls [disabled]
----------------------------->8------------------------
Now to make it possible to use Elf32 toolchain for building Linux kernel
we're explicitly add "-mmedium-calls" to CFLAGS.
And since we add "-mmedium-calls" to the global CFLAGS there's no point in
having per-file copies thus removing them.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions