tools build: Fix libiberty feature detection

Any CFLAGS or LDFLAGS set by the user need to be passed to the feature
build command.  This many include for example -I or -L to point to
libraries and include files in custom paths.

In most of the test-*.bin rules in build/feature/Makefile, we use the BUILD
macro which always sends in CFLAGS and LDFLAGS.  The libiberty build line
however doesn't use the BUILD macro and thus needs to send in CFLAGS and
LDFLAGS explicitly.  Without this, when using custom CFLAGS/LDFLAGS, libiberty
fails to be detected and the perf link fails with something like:

   LINK     perf
  libbfd.a(bfd.o): In function `bfd_errmsg':
  bfd.c:(.text+0x168): undefined reference to `xstrerror'
  bbfd.a(opncls.o): In function `_bfd_new_bfd':
  opncls.c:(.text+0xe8): undefined reference to `objalloc_create'
  ...

Signed-off-by: Rabin Vincent <rabin.vincent@axis.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Rabin Vincent <rabinv@axis.com>
Link: http://lkml.kernel.org/r/1446104978-26429-2-git-send-email-rabin.vincent@axis.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index e43a2971bf5669a8cae7722e8d5058fb9ada56ea..cea04ce9f35cdfb7e5b217077d60b214894b6c48 100644 (file)
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -132,10 +132,10 @@ test-libbfd.bin:
        $(BUILD) -DPACKAGE='"perf"' -lbfd -lz -liberty -ldl
 
 test-liberty.bin:
-       $(CC) -Wall -Werror -o $(OUTPUT)$@ test-libbfd.c -DPACKAGE='"perf"' -lbfd -ldl -liberty
+       $(CC) $(CFLAGS) -Wall -Werror -o $(OUTPUT)$@ test-libbfd.c -DPACKAGE='"perf"' $(LDFLAGS) -lbfd -ldl -liberty
 
 test-liberty-z.bin:
-       $(CC) -Wall -Werror -o $(OUTPUT)$@ test-libbfd.c -DPACKAGE='"perf"' -lbfd -ldl -liberty -lz
+       $(CC) $(CFLAGS) -Wall -Werror -o $(OUTPUT)$@ test-libbfd.c -DPACKAGE='"perf"' $(LDFLAGS) -lbfd -ldl -liberty -lz
 
 test-cplus-demangle.bin:
        $(BUILD) -liberty