[LTP] [PATCH v2 1/4] Makefile: Add C header with generated LTP version

[Petr Vorel]

From: Cyril Hrubis <chrubis@suse.cz>

It will be used for printing LTP version in C API.

Reviewed-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
 lib/.gitignore     |  2 ++
 lib/Makefile       | 13 +++++++++++++
 lib/gen_version.sh | 16 ++++++++++++++++
 3 files changed, 31 insertions(+)
 create mode 100644 lib/.gitignore
 create mode 100755 lib/gen_version.sh

diff --git a/lib/.gitignore b/lib/.gitignore
new file mode 100644
index 000000000..1bd967e2f
--- /dev/null
+++ b/lib/.gitignore
@@ -0,0 +1,2 @@
+/ltp-version.h
+/cached-version
diff --git a/lib/Makefile b/lib/Makefile
index 9b9906f25..ac1f62048 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -20,6 +20,19 @@ pc_file			:= $(DESTDIR)/$(datarootdir)/pkgconfig/ltp.pc
 
 INSTALL_TARGETS		:= $(pc_file)
 
+tst_test.o: ltp-version.h
+
+ltp-version.h: gen_version
+
+MAKE_TARGETS += gen_version
+
+.PHONY: gen_version
+gen_version:
+	@echo GEN ltp-version.h
+	@./gen_version.sh
+
+CLEAN_TARGETS += ltp-version.h cached-version
+
 $(pc_file):
 	test -d "$(@D)" || mkdir -p "$(@D)"
 	install -m $(INSTALL_MODE) "$(builddir)/$(@F)" "$@"
diff --git a/lib/gen_version.sh b/lib/gen_version.sh
new file mode 100755
index 000000000..5d4250755
--- /dev/null
+++ b/lib/gen_version.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+touch cached-version
+
+if git describe >/dev/null 2>&1; then
+	VERSION=`git describe`
+else
+	VERSION=`cat $(dirname $0)/../VERSION`
+fi
+
+CACHED_VERSION=`cat cached-version`
+
+if [ "$CACHED_VERSION" != "$VERSION" ]; then
+	echo "$VERSION" > cached-version
+	echo "#define LTP_VERSION \"$VERSION\"" > ltp-version.h
+fi
-- 
2.40.1