tools lib subcmd: Add install target

This allows libsubcmd to be installed as a dependency.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nicolas Schier <nicolas@fjasle.eu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: bpf@vger.kernel.org
Link: http://lore.kernel.org/lkml/20221109184914.1357295-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/lib/subcmd/Makefile b/tools/lib/subcmd/Makefile
index 8f1a09c..e96566f 100644 (file)
--- a/tools/lib/subcmd/Makefile
+++ b/tools/lib/subcmd/Makefile
@@ -17,6 +17,15 @@ RM = rm -f
 
 MAKEFLAGS += --no-print-directory
 
+INSTALL = install
+
+# Use DESTDIR for installing into a different root directory.
+# This is useful for building a package. The program will be
+# installed in this directory as if it was the root directory.
+# Then the build tool can move it later.
+DESTDIR ?=
+DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
+
 LIBFILE = $(OUTPUT)libsubcmd.a
 
 CFLAGS := -ggdb3 -Wall -Wextra -std=gnu99 -fPIC
@@ -48,6 +57,18 @@ CFLAGS += $(EXTRA_WARNINGS) $(EXTRA_CFLAGS)
 
 SUBCMD_IN := $(OUTPUT)libsubcmd-in.o
 
+ifeq ($(LP64), 1)
+  libdir_relative = lib64
+else
+  libdir_relative = lib
+endif
+
+prefix ?=
+libdir = $(prefix)/$(libdir_relative)
+
+# Shell quotes
+libdir_SQ = $(subst ','\'',$(libdir))
+
 all:
 
 export srctree OUTPUT CC LD CFLAGS V
@@ -61,6 +82,34 @@ $(SUBCMD_IN): FORCE
 $(LIBFILE): $(SUBCMD_IN)
        $(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $(SUBCMD_IN)
 
+define do_install_mkdir
+       if [ ! -d '$(DESTDIR_SQ)$1' ]; then             \
+               $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
+       fi
+endef
+
+define do_install
+       if [ ! -d '$(DESTDIR_SQ)$2' ]; then             \
+               $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \
+       fi;                                             \
+       $(INSTALL) $1 $(if $3,-m $3,) '$(DESTDIR_SQ)$2'
+endef
+
+install_lib: $(LIBFILE)
+       $(call QUIET_INSTALL, $(LIBFILE)) \
+               $(call do_install_mkdir,$(libdir_SQ)); \
+               cp -fpR $(LIBFILE) $(DESTDIR)$(libdir_SQ)
+
+install_headers:
+       $(call QUIET_INSTALL, headers) \
+               $(call do_install,exec-cmd.h,$(prefix)/include/subcmd,644); \
+               $(call do_install,help.h,$(prefix)/include/subcmd,644); \
+               $(call do_install,pager.h,$(prefix)/include/subcmd,644); \
+               $(call do_install,parse-options.h,$(prefix)/include/subcmd,644); \
+               $(call do_install,run-command.h,$(prefix)/include/subcmd,644);
+
+install: install_lib install_headers
+
 clean:
        $(call QUIET_CLEAN, libsubcmd) $(RM) $(LIBFILE); \
        find $(or $(OUTPUT),.) -name \*.o -or -name \*.o.cmd -or -name \*.o.d | xargs $(RM)