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Generate a version.h file

Related: OS#6626
Change-Id: If3972eb4e56073f8faf58b09d014a811d4a5f401
---
M .gitignore
M include/osmocom/gtp/Makefile.am
A include/osmocom/gtp/version.h.tpl
3 files changed, 28 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ggsn refs/changes/19/40519/1

diff --git a/.gitignore b/.gitignore
index 12f3c4a..7c3444d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -86,3 +86,5 @@
 /debian/gtp-echo-responder/
 /debian/osmo-ggsn-doc/
 /utils/gtp-echo-responder
+
+include/osmocom/gtp/version.h
diff --git a/include/osmocom/gtp/Makefile.am b/include/osmocom/gtp/Makefile.am
index db696e5..cf9235d 100644
--- a/include/osmocom/gtp/Makefile.am
+++ b/include/osmocom/gtp/Makefile.am
@@ -1,8 +1,18 @@
+version.h: version.h.tpl
+	$(AM_V_GEN)$(MKDIR_P) $(dir $@)
+	$(AM_V_GEN)sed \
+		-e "s/{{VERSION}}/$$(echo '@VERSION@' | cut -d. -f1-3)/g" \
+		-e "s/{{VERSION_MAJOR}}/$$(echo '@VERSION@' | cut -d. -f1)/g" \
+		-e "s/{{VERSION_MINOR}}/$$(echo '@VERSION@' | cut -d. -f2)/g" \
+		-e "s/{{VERSION_PATCH}}/$$(echo '@VERSION@' | cut -d. -f3)/g" \
+		$< > $@
+
 libgtp_HEADERS = \
 	gsn.h \
 	gtp.h \
 	gtpie.h \
 	pdp.h \
+	version.h \
 	$(NULL)
 
 libgtpdir = $(includedir)/osmocom/gtp
diff --git a/include/osmocom/gtp/version.h.tpl b/include/osmocom/gtp/version.h.tpl
new file mode 100644
index 0000000..5b09393
--- /dev/null
+++ b/include/osmocom/gtp/version.h.tpl
@@ -0,0 +1,16 @@
+#pragma once
+
+#define LIBGTP_VERSION {{VERSION}}
+#define LIBGTP_VERSION_STR "{{VERSION}}"
+
+#define LIBGTP_VERSION_MAJOR {{VERSION_MAJOR}}
+#define LIBGTP_VERSION_MINOR {{VERSION_MINOR}}
+#define LIBGTP_VERSION_PATCH {{VERSION_PATCH}}
+
+#define LIBGTP_VERSION_GREATER_EQUAL(major, minor, patch) \
+	(LIBGTP_VERSION_MAJOR > (major) || \
+	 (LIBGTP_VERSION_MAJOR == (major) && \
+	  LIBGTP_VERSION_MINOR > (minor)) || \
+	 (LIBGTP_VERSION_MAJOR == (major) && \
+	  LIBGTP_VERSION_MINOR == (minor) && \
+	  LIBGTP_VERSION_PATCH >= (patch)))

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