linux-kernel - [PATCH v2 02/14] tools lib subcmd: Add install target

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Message-Id: <20221109184914.1357295-3-irogers@google.com>
Date:   Wed,  9 Nov 2022 10:49:02 -0800
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Nicolas Schier <nicolas@...sle.eu>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        bpf@...r.kernel.org, Nick Desaulniers <ndesaulniers@...gle.com>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH v2 02/14] tools lib subcmd: Add install target

This allows libsubcmd to be installed as a dependency.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/lib/subcmd/Makefile | 49 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/tools/lib/subcmd/Makefile b/tools/lib/subcmd/Makefile
index 8f1a09cdfd17..e96566f8991c 100644
--- 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)
-- 
2.38.1.431.g37b22c650d-goog