[Buildroot] [git commit branch/2019.02.x] package/linux-tools/perf: add dependency on 32-bit sync builtins

Peter Korsgaard peter at korsgaard.com
Wed Apr 24 15:23:38 UTC 2019


commit: https://git.buildroot.net/buildroot/commit/?id=b9e934bfbf168aa26c68172bd3e2446feae937bb
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2019.02.x

Sync builtins ops are strictly required by perf utility as it uses
atomic_xxx() functions.

Otherwise building fails like that:
|.../output/host/opt/ext-toolchain/bin/../lib/gcc/arc-snps-linux-uclibc/8.2.1/../../../../arc-snps-linux-uclibc/bin/ld:
|.../output/build/linux-5.0.7/tools/perf/libperf.a(libperf-in.o): in function `atomic_cmpxchg':
|.../output/build/linux-5.0.7/tools/include/asm-generic/atomic-gcc.h:69: undefined reference to `__sync_val_compare_and_swap_4'

Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
Cc: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
[Thomas: drop Config.in comment]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>

(cherry picked from commit d5edfa6eef6a0e0b124b894be4ce5da4f14c4af7)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 package/linux-tools/Config.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/linux-tools/Config.in b/package/linux-tools/Config.in
index 4916faa349..90b4825fee 100644
--- a/package/linux-tools/Config.in
+++ b/package/linux-tools/Config.in
@@ -46,6 +46,7 @@ config BR2_PACKAGE_LINUX_TOOLS_PCI
 config BR2_PACKAGE_LINUX_TOOLS_PERF
 	bool "perf"
 	select BR2_PACKAGE_LINUX_TOOLS
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	help
 	  perf (sometimes "Perf Events" or perf tools, originally
 	  "Performance Counters for Linux") - is a performance


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