tools build: Move tabs to spaces where suitable

We've been hit several times by a Makefile bug where line indented by
tab was falsely considered as target command.

We prevent this by always using space indentation for everything except
for the target commands.

Signed-off-by: Jiri Olsa <[e-mail]>
Cc: David Ahern <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/build/Build.include

···
 #                   target, or command line has changed and update
 #                   dependencies in the cmd file
 if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)),         \
-	@set -e;                                                   \
-	$(echo-cmd) $(cmd_$(1)) && $(dep-cmd))
+                  @set -e;                                         \
+                  $(echo-cmd) $(cmd_$(1)) && $(dep-cmd))
 
 # if_changed      - execute command if any prerequisite is newer than
 #                   target, or command line has changed
-if_changed = $(if $(strip $(any-prereq) $(arg-check)),             \
-	@set -e;                                                   \
-	$(echo-cmd) $(cmd_$(1));                                   \
-	printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
+if_changed = $(if $(strip $(any-prereq) $(arg-check)),                   \
+              @set -e;                                                   \
+              $(echo-cmd) $(cmd_$(1));                                   \
+              printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
 
 ###
 # C flags to be used in rule definitions, includes:

tools/build/Makefile.feature

···
 #   the rule that uses them - an example for that is the 'bionic'
 #   feature check. ]
 #
-FEATURE_TESTS_BASIC :=			\
-	backtrace			\
-	dwarf				\
-	dwarf_getlocations		\
-	fortify-source			\
-	sync-compare-and-swap		\
-	glibc				\
-	gtk2				\
-	gtk2-infobar			\
-	libaudit			\
-	libbfd				\
-	libelf				\
-	libelf-getphdrnum		\
-	libelf-gelf_getnote		\
-	libelf-getshdrstrndx		\
-	libelf-mmap			\
-	libnuma				\
-	numa_num_possible_cpus		\
-	libperl				\
-	libpython			\
-	libpython-version		\
-	libslang			\
-	libcrypto			\
-	libunwind			\
-	libunwind-x86			\
-	libunwind-x86_64		\
-	libunwind-arm			\
-	libunwind-aarch64		\
-	pthread-attr-setaffinity-np	\
-	stackprotector-all		\
-	timerfd				\
-	libdw-dwarf-unwind		\
-	zlib				\
-	lzma				\
-	get_cpuid			\
-	bpf				\
-	sdt
+FEATURE_TESTS_BASIC :=                  \
+        backtrace                       \
+        dwarf                           \
+        dwarf_getlocations              \
+        fortify-source                  \
+        sync-compare-and-swap           \
+        glibc                           \
+        gtk2                            \
+        gtk2-infobar                    \
+        libaudit                        \
+        libbfd                          \
+        libelf                          \
+        libelf-getphdrnum               \
+        libelf-gelf_getnote             \
+        libelf-getshdrstrndx            \
+        libelf-mmap                     \
+        libnuma                         \
+        numa_num_possible_cpus          \
+        libperl                         \
+        libpython                       \
+        libpython-version               \
+        libslang                        \
+        libcrypto                       \
+        libunwind                       \
+        libunwind-x86                   \
+        libunwind-x86_64                \
+        libunwind-arm                   \
+        libunwind-aarch64               \
+        pthread-attr-setaffinity-np     \
+        stackprotector-all              \
+        timerfd                         \
+        libdw-dwarf-unwind              \
+        zlib                            \
+        lzma                            \
+        get_cpuid                       \
+        bpf                             \
+        sdt
 
 # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
 # of all feature tests
-FEATURE_TESTS_EXTRA :=			\
-	bionic				\
-	compile-32			\
-	compile-x32			\
-	cplus-demangle			\
-	hello				\
-	libbabeltrace			\
-	liberty				\
-	liberty-z			\
-	libunwind-debug-frame		\
-	libunwind-debug-frame-arm	\
-	libunwind-debug-frame-aarch64
+FEATURE_TESTS_EXTRA :=                  \
+         bionic                         \
+         compile-32                     \
+         compile-x32                    \
+         cplus-demangle                 \
+         hello                          \
+         libbabeltrace                  \
+         liberty                        \
+         liberty-z                      \
+         libunwind-debug-frame          \
+         libunwind-debug-frame-arm      \
+         libunwind-debug-frame-aarch64
 
 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
 
···
   FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
 endif
 
-FEATURE_DISPLAY ?=			\
-	dwarf				\
-	dwarf_getlocations		\
-	glibc				\
-	gtk2				\
-	libaudit			\
-	libbfd				\
-	libelf				\
-	libnuma				\
-	numa_num_possible_cpus		\
-	libperl				\
-	libpython			\
-	libslang			\
-	libcrypto			\
-	libunwind			\
-	libdw-dwarf-unwind		\
-	zlib				\
-	lzma				\
-	get_cpuid			\
-	bpf
+FEATURE_DISPLAY ?=              \
+         dwarf                  \
+         dwarf_getlocations     \
+         glibc                  \
+         gtk2                   \
+         libaudit               \
+         libbfd                 \
+         libelf                 \
+         libnuma                \
+         numa_num_possible_cpus \
+         libperl                \
+         libpython              \
+         libslang               \
+         libcrypto              \
+         libunwind              \
+         libdw-dwarf-unwind     \
+         zlib                   \
+         lzma                   \
+         get_cpuid              \
+         bpf
 
 # 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

tools/build/feature/Makefile

···
-FILES=					\
-	test-all.bin			\
-	test-backtrace.bin		\
-	test-bionic.bin			\
-	test-dwarf.bin			\
-	test-dwarf_getlocations.bin	\
-	test-fortify-source.bin		\
-	test-sync-compare-and-swap.bin	\
-	test-glibc.bin			\
-	test-gtk2.bin			\
-	test-gtk2-infobar.bin		\
-	test-hello.bin			\
-	test-libaudit.bin		\
-	test-libbfd.bin			\
-	test-liberty.bin		\
-	test-liberty-z.bin		\
-	test-cplus-demangle.bin		\
-	test-libelf.bin			\
-	test-libelf-getphdrnum.bin	\
-	test-libelf-gelf_getnote.bin	\
-	test-libelf-getshdrstrndx.bin	\
-	test-libelf-mmap.bin		\
-	test-libnuma.bin		\
-	test-numa_num_possible_cpus.bin	\
-	test-libperl.bin		\
-	test-libpython.bin		\
-	test-libpython-version.bin	\
-	test-libslang.bin		\
-	test-libcrypto.bin		\
-	test-libunwind.bin		\
-	test-libunwind-debug-frame.bin	\
-	test-libunwind-x86.bin		\
-	test-libunwind-x86_64.bin	\
-	test-libunwind-arm.bin		\
-	test-libunwind-aarch64.bin	\
-	test-libunwind-debug-frame-arm.bin	\
-	test-libunwind-debug-frame-aarch64.bin	\
-	test-pthread-attr-setaffinity-np.bin	\
-	test-stackprotector-all.bin	\
-	test-timerfd.bin		\
-	test-libdw-dwarf-unwind.bin	\
-	test-libbabeltrace.bin		\
-	test-compile-32.bin		\
-	test-compile-x32.bin		\
-	test-zlib.bin			\
-	test-lzma.bin			\
-	test-bpf.bin			\
-	test-get_cpuid.bin		\
-	test-sdt.bin			\
-	test-cxx.bin			\
-	test-jvmti.bin
+FILES=                                          \
+         test-all.bin                           \
+         test-backtrace.bin                     \
+         test-bionic.bin                        \
+         test-dwarf.bin                         \
+         test-dwarf_getlocations.bin            \
+         test-fortify-source.bin                \
+         test-sync-compare-and-swap.bin         \
+         test-glibc.bin                         \
+         test-gtk2.bin                          \
+         test-gtk2-infobar.bin                  \
+         test-hello.bin                         \
+         test-libaudit.bin                      \
+         test-libbfd.bin                        \
+         test-liberty.bin                       \
+         test-liberty-z.bin                     \
+         test-cplus-demangle.bin                \
+         test-libelf.bin                        \
+         test-libelf-getphdrnum.bin             \
+         test-libelf-gelf_getnote.bin           \
+         test-libelf-getshdrstrndx.bin          \
+         test-libelf-mmap.bin                   \
+         test-libnuma.bin                       \
+         test-numa_num_possible_cpus.bin        \
+         test-libperl.bin                       \
+         test-libpython.bin                     \
+         test-libpython-version.bin             \
+         test-libslang.bin                      \
+         test-libcrypto.bin                     \
+         test-libunwind.bin                     \
+         test-libunwind-debug-frame.bin         \
+         test-libunwind-x86.bin                 \
+         test-libunwind-x86_64.bin              \
+         test-libunwind-arm.bin                 \
+         test-libunwind-aarch64.bin             \
+         test-libunwind-debug-frame-arm.bin     \
+         test-libunwind-debug-frame-aarch64.bin \
+         test-pthread-attr-setaffinity-np.bin   \
+         test-stackprotector-all.bin            \
+         test-timerfd.bin                       \
+         test-libdw-dwarf-unwind.bin            \
+         test-libbabeltrace.bin                 \
+         test-compile-32.bin                    \
+         test-compile-x32.bin                   \
+         test-zlib.bin                          \
+         test-lzma.bin                          \
+         test-bpf.bin                           \
+         test-get_cpuid.bin                     \
+         test-sdt.bin                           \
+         test-cxx.bin                           \
+         test-jvmti.bin
 
 FILES := $(addprefix $(OUTPUT),$(FILES))