package/linux-tools/perf: add dependency on 32-bit sync builtins

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

diff --git a/package/linux-tools/Config.in b/package/linux-tools/Config.in
index 4916faa349e5427ddfc683bdb6b63c374eda2a13..90b4825feec2fda92a2b684f9b1e2b6abd5f8cbd 100644 (file)
--- 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