linux-kernel - [PATCH v2 1/5] tools build: add feature test for init_disassemble

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Message-Id: <20220703212551.1114923-2-andres@anarazel.de>
Date:   Sun,  3 Jul 2022 14:25:47 -0700
From:   Andres Freund <andres@...razel.de>
To:     bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Quentin Monnet <quentin@...valent.com>
Subject: [PATCH v2 1/5] tools build: add feature test for init_disassemble_info API changes

binutils changed the signature of init_disassemble_info(), which now causes
compilation failures for tools/{perf,bpf}, e.g. on debian unstable.
Relevant binutils commit:
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=60a3da00bd5407f07

This commit adds a feature test to detect the new signature.  Subsequent
commits will use it to fix the build failures.

Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Sedat Dilek <sedat.dilek@...il.com>
Cc: Quentin Monnet <quentin@...valent.com>
Link: http://lore.kernel.org/lkml/20220622181918.ykrs5rsnmx3og4sv@alap3.anarazel.de
Signed-off-by: Andres Freund <andres@...razel.de>
---
 tools/build/Makefile.feature                        |  4 +++-
 tools/build/feature/Makefile                        |  4 ++++
 tools/build/feature/test-all.c                      |  4 ++++
 tools/build/feature/test-disassembler-init-styled.c | 13 +++++++++++++
 4 files changed, 24 insertions(+), 1 deletion(-)
 create mode 100644 tools/build/feature/test-disassembler-init-styled.c

diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index 888a0421d43b..339686b99a6e 100644
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -70,6 +70,7 @@ FEATURE_TESTS_BASIC :=                  \
         libaio				\
         libzstd				\
         disassembler-four-args		\
+        disassembler-init-styled	\
         file-handle
 
 # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
@@ -135,7 +136,8 @@ FEATURE_DISPLAY ?=              \
          bpf			\
          libaio			\
          libzstd		\
-         disassembler-four-args
+         disassembler-four-args	\
+         disassembler-init-styled
 
 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
 # If in the future we need per-feature checks/flags for features not
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index 7c2a17e23c30..c3059739318a 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -18,6 +18,7 @@ FILES=                                          \
          test-libbfd.bin                        \
          test-libbfd-buildid.bin		\
          test-disassembler-four-args.bin        \
+         test-disassembler-init-styled.bin	\
          test-reallocarray.bin			\
          test-libbfd-liberty.bin                \
          test-libbfd-liberty-z.bin              \
@@ -248,6 +249,9 @@ $(OUTPUT)test-libbfd-buildid.bin:
 $(OUTPUT)test-disassembler-four-args.bin:
 	$(BUILD) -DPACKAGE='"perf"' -lbfd -lopcodes
 
+$(OUTPUT)test-disassembler-init-styled.bin:
+	$(BUILD) -DPACKAGE='"perf"' -lbfd -lopcodes
+
 $(OUTPUT)test-reallocarray.bin:
 	$(BUILD)
 
diff --git a/tools/build/feature/test-all.c b/tools/build/feature/test-all.c
index 5ffafb967b6e..957c02c7b163 100644
--- a/tools/build/feature/test-all.c
+++ b/tools/build/feature/test-all.c
@@ -166,6 +166,10 @@
 # include "test-disassembler-four-args.c"
 #undef main
 
+#define main main_test_disassembler_init_styled
+# include "test-disassembler-init-styled.c"
+#undef main
+
 #define main main_test_libzstd
 # include "test-libzstd.c"
 #undef main
diff --git a/tools/build/feature/test-disassembler-init-styled.c b/tools/build/feature/test-disassembler-init-styled.c
new file mode 100644
index 000000000000..f1ce0ec3bee9
--- /dev/null
+++ b/tools/build/feature/test-disassembler-init-styled.c
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <dis-asm.h>
+
+int main(void)
+{
+	struct disassemble_info info;
+
+	init_disassemble_info(&info, stdout,
+			      NULL, NULL);
+
+	return 0;
+}
-- 
2.37.0.3.g30cc8d0f14