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| author | Alexey Brodkin <abrodkin@synopsys.com> | 2018-05-21 13:33:50 +0300 |
|---|---|---|
| committer | Alexey Brodkin <abrodkin@synopsys.com> | 2018-05-21 15:03:17 +0300 |
| commit | 409046f91d18f4f80f044f2e9c08c0e9e04eeb92 (patch) | |
| tree | 6766dc5fe6802b6388bf0e93f73d6cfdfb2909ce /samples/arc-arc700-linux-uclibc | |
| parent | 0a64056dd3d094503a1ef1d23d2636bcd9708b2f (diff) | |
| download | crosstool-ng-409046f91d18f4f80f044f2e9c08c0e9e04eeb92.tar.gz crosstool-ng-409046f91d18f4f80f044f2e9c08c0e9e04eeb92.tar.bz2 crosstool-ng-409046f91d18f4f80f044f2e9c08c0e9e04eeb92.zip | |
ARC: Update Linux samples
There's no point in keeping samples which are in its essense
just a sub-set of multilib toolchain.
But still we'd like to cover quite unusual but really existing
case - ARC750, i.e. ARC700 with MMU but without so-called
atomic instructions (LLOCK/SCOND). To support this HW variation
we need:
1) Compile all target binaries without "-matomics" or even
better "-mno-atomics" so that's even future-proof
(as we may decide to enable "-matomics" by default for Linux
targets which is a recommented setup).
2) Configure libc such that it uses Linux-kernel-assisted implementation
of atomic operation via "arc_usr_cmpxchg" syscall,
see https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=b985fa069187e4c5a7ee84213d9fbead2f219ce5
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Diffstat (limited to 'samples/arc-arc700-linux-uclibc')
| -rw-r--r-- | samples/arc-arc700-linux-uclibc/crosstool.config | 2 | ||||
| -rw-r--r-- | samples/arc-arc700-linux-uclibc/reported.by | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/samples/arc-arc700-linux-uclibc/crosstool.config b/samples/arc-arc700-linux-uclibc/crosstool.config index e7b298b3..66a0b52c 100644 --- a/samples/arc-arc700-linux-uclibc/crosstool.config +++ b/samples/arc-arc700-linux-uclibc/crosstool.config @@ -1,6 +1,6 @@ CT_ARCH_ARC=y CT_TARGET_ALIAS="arc-linux" -CT_TARGET_CFLAGS="-matomic" +CT_TARGET_CFLAGS="-mno-atomic" CT_TARGET_VENDOR="snps" CT_KERNEL_LINUX=y CT_LIBC_UCLIBC=y diff --git a/samples/arc-arc700-linux-uclibc/reported.by b/samples/arc-arc700-linux-uclibc/reported.by index 9019567a..a493696e 100644 --- a/samples/arc-arc700-linux-uclibc/reported.by +++ b/samples/arc-arc700-linux-uclibc/reported.by @@ -1,3 +1,3 @@ reporter_name="Alexey Brodkin" reporter_url="http://embarc.org" -reporter_comment="ARCompact default Linux toolchain" +reporter_comment="ARCompact uClibc Linux toolchain without atomics" |