[PATCH 1/2] perf: Be compatible with all python versions when fetching ldflags

[zhe.he]

From: He Zhe <zhe.he@xxxxxxxxxxxxx>

Since Python v3.8.0, with the following commit
0a8e57248b91 ("bpo-36721: Add --embed option to python-config (GH-13500)"),
--embed option must be passed to "python3-config --ldflags --embed" or
"python3-config --libs --embed" to get "-lpython3.8".

To make it compatible with all Python versons, according to the suggestion
in the commit log, we try with --embed first and then witout it if fails.

Signed-off-by: He Zhe <zhe.he@xxxxxxxxxxxxx>
---
 tools/perf/Makefile.config | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 80e55e7..b2eabcf 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -229,7 +229,7 @@ strip-libs  = $(filter-out -l%,$(1))
 PYTHON_CONFIG_SQ := $(call shell-sq,$(PYTHON_CONFIG))
 
 ifdef PYTHON_CONFIG
-  PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
+  PYTHON_EMBED_LDOPTS := $(shell $(PYTHON_CONFIG_SQ) --ldflags --embed 2>/dev/null || $(PYTHON_CONFIG_SQ) --ldflags 2>/dev/null)
   PYTHON_EMBED_LDFLAGS := $(call strip-libs,$(PYTHON_EMBED_LDOPTS))
   PYTHON_EMBED_LIBADD := $(call grep-libs,$(PYTHON_EMBED_LDOPTS)) -lutil
   PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --includes 2>/dev/null)
-- 
2.7.4