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authorAlexey Brodkin <abrodkin@synopsys.com>2015-02-03 13:58:20 +0300
committerAlexey Brodkin <abrodkin@synopsys.com>2015-02-09 16:41:20 +0300
commita67ef280f46803e319639f5380ff8da6c6b7fbe7 (patch)
tree420a2667834a71aca4a714b8fe0c93968fdf4696 /arch/Kconfig
parent51f4999bc5ad5f8430da0297d12c1abef9c05568 (diff)
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arc: build libgcc in U-Boot
This way we may have very limited set of functions implemented so we save some space. Also it allows us to build U-Boot for any ARC core with the same one toolchain because we don't rely on pre-built libgcc. For example: * we may use little-endian toolchain but build U-Boot for ether endianess * we may use non-multilibbed uClibc toolchain but build U-Boot for whatever ARC CPU flavour that current GCC supports Private libgcc built from generic C implementation contributes only 144 bytes to .text section so we don't see significant degradation of size: --->8--- $ arc-linux-size u-boot.libgcc-prebuilt text data bss dec hex filename 222217 24912 214820 461949 70c7d u-boot.libgcc-prebuilt $ arc-linux-size u-boot.libgcc-private text data bss dec hex filename 222361 24912 214820 462093 70d0d u-boot.libgcc-private --->8--- Also I don't notice visible performance degradation compared to pre-built libgcc (where at least "*div*" functions are had-written in assembly) on typical operations of downloading 10Mb uImage over TFTP and bootm. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Diffstat (limited to 'arch/Kconfig')
-rw-r--r--arch/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index f63cc5a..132123b 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -4,6 +4,7 @@ choice
config ARC
bool "ARC architecture"
+ select HAVE_PRIVATE_LIBGCC
config ARM
bool "ARM architecture"