From 14541b1e7e723859ff2c75c6fc10cdbbec6b8c34 Mon Sep 17 00:00:00 2001 From: Stanislav Fomichev Date: Thu, 15 Nov 2018 16:32:01 -0800 Subject: perf build: Don't unconditionally link the libbfd feature test to -liberty and -lz Current libbfd feature test unconditionally links against -liberty and -lz. While it's required on some systems (e.g. opensuse), it's completely unnecessary on the others, where only -lbdf is sufficient (debian). This patch streamlines (and renames) the following feature checks: feature-libbfd - only link against -lbfd (debian), see commit 2cf9040714f3 ("perf tools: Fix bfd dependency libraries detection") feature-libbfd-liberty - link against -lbfd and -liberty feature-libbfd-liberty-z - link against -lbfd, -liberty and -lz (opensuse), see commit 280e7c48c3b8 ("perf tools: fix BFD detection on opensuse") (feature-liberty{,-z} were renamed to feature-libbfd-liberty{,z} for clarity) The main motivation is to fix this feature test for bpftool which is currently broken on debian (libbfd feature shows OFF, but we still unconditionally link against -lbfd and it works). Tested on debian with only -lbfd installed (without -liberty); I'd appreciate if somebody on the other systems can test this new detection method. Signed-off-by: Stanislav Fomichev Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Mathieu Poirier Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/4dfc634cfcfb236883971b5107cf3c28ec8a31be.1542328222.git.sdf@google.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/build/feature/Makefile | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'tools/build/feature') diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile index 2dbcc0d00f52..7ceb4441b627 100644 --- a/tools/build/feature/Makefile +++ b/tools/build/feature/Makefile @@ -17,8 +17,8 @@ FILES= \ test-libbfd.bin \ test-disassembler-four-args.bin \ test-reallocarray.bin \ - test-liberty.bin \ - test-liberty-z.bin \ + test-libbfd-liberty.bin \ + test-libbfd-liberty-z.bin \ test-cplus-demangle.bin \ test-libelf.bin \ test-libelf-getphdrnum.bin \ @@ -210,7 +210,7 @@ $(OUTPUT)test-libpython-version.bin: $(BUILD) $(OUTPUT)test-libbfd.bin: - $(BUILD) -DPACKAGE='"perf"' -lbfd -lz -liberty -ldl + $(BUILD) -DPACKAGE='"perf"' -lbfd -ldl $(OUTPUT)test-disassembler-four-args.bin: $(BUILD) -DPACKAGE='"perf"' -lbfd -lopcodes @@ -218,10 +218,10 @@ $(OUTPUT)test-disassembler-four-args.bin: $(OUTPUT)test-reallocarray.bin: $(BUILD) -$(OUTPUT)test-liberty.bin: +$(OUTPUT)test-libbfd-liberty.bin: $(CC) $(CFLAGS) -Wall -Werror -o $@ test-libbfd.c -DPACKAGE='"perf"' $(LDFLAGS) -lbfd -ldl -liberty -$(OUTPUT)test-liberty-z.bin: +$(OUTPUT)test-libbfd-liberty-z.bin: $(CC) $(CFLAGS) -Wall -Werror -o $@ test-libbfd.c -DPACKAGE='"perf"' $(LDFLAGS) -lbfd -ldl -liberty -lz $(OUTPUT)test-cplus-demangle.bin: -- cgit v1.2.3