[PATCH] libtracecmd: Update libtracecmd.pc when version changes

[PATCH] libtracecmd: Update libtracecmd.pc when version changes

[Steven Rostedt]

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

When the libtracecmd version changes, the libtracecmd.pc needs to be
updated, otherwise it may install the wrong version number.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 .gitignore |  1 +
 Makefile   | 32 ++++++++++++++++++++++++++++++--
 2 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index af9bf6c0..f0719c5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,3 +27,4 @@ libtracecmd.pc
 build_prefix
 build_install
 build_libs_install
+ltc_version.h
diff --git a/Makefile b/Makefile
index 6e330e47..48d45809 100644
--- a/Makefile
+++ b/Makefile
@@ -20,6 +20,8 @@ export LIBTC_PATCHLEVEL
 export LIBTC_EXTRAVERSION
 export LIBTRACECMD_VERSION
 
+VERSION_FILE = ltc_version.h
+
 LIBTRACEEVENT_MIN_VERSION = 1.1
 LIBTRACEFS_MIN_VERSION = 1.1
 
@@ -371,7 +373,7 @@ BUILD_PREFIX := $(BUILD_OUTPUT)/build_prefix
 $(BUILD_PREFIX): force
 	$(Q)$(call build_prefix,$(prefix))
 
-$(PKG_CONFIG_FILE) : ${PKG_CONFIG_SOURCE_FILE}.template $(BUILD_PREFIX)
+$(PKG_CONFIG_FILE) : ${PKG_CONFIG_SOURCE_FILE}.template $(BUILD_PREFIX) $(VERSION_FILE)
 	$(Q) $(call do_make_pkgconfig_file,$(prefix))
 
 $(kshark-dir)/build/Makefile: $(kshark-dir)/CMakeLists.txt
@@ -392,6 +394,32 @@ libtracecmd.so: $(LIBTRACECMD_SHARED)
 
 libs: $(LIBTRACECMD_SHARED) $(PKG_CONFIG_FILE)
 
+VERSION = $(LIBTC_VERSION)
+PATCHLEVEL = $(LIBTC_PATCHLEVEL)
+EXTRAVERSION = $(LIBTC_EXTRAVERSION)
+
+define make_version.h
+  (echo '/* This file is automatically generated. Do not modify. */';		\
+   echo \#define VERSION_CODE $(shell						\
+   expr $(VERSION) \* 256 + $(PATCHLEVEL));					\
+   echo '#define EXTRAVERSION ' $(EXTRAVERSION);				\
+   echo '#define VERSION_STRING "'$(VERSION).$(PATCHLEVEL).$(EXTRAVERSION)'"';	\
+  ) > $1
+endef
+
+define update_version.h
+  ($(call make_version.h, $@.tmp);		\
+    if [ -r $@ ] && cmp -s $@ $@.tmp; then	\
+      rm -f $@.tmp;				\
+    else					\
+      echo '  UPDATE                 $@';	\
+      mv -f $@.tmp $@;				\
+    fi);
+endef
+
+$(VERSION_FILE): force
+	$(Q)$(call update_version.h)
+
 gui: force $(CMD_TARGETS)
 	$(MAKE) $(kshark-dir)/build/Makefile
 	$(Q)$(MAKE) $(S) -C $(kshark-dir)/build
@@ -490,7 +518,7 @@ install_doc_gui:
 
 clean:
 	$(RM) *.o *~ *.a *.so .*.d
-	$(RM) tags TAGS cscope* $(PKG_CONFIG_SOURCE_FILE)
+	$(RM) tags TAGS cscope* $(PKG_CONFIG_SOURCE_FILE) $(VERSION_FILE)
 	$(MAKE) -C $(src)/lib/trace-cmd clean
 	$(MAKE) -C $(src)/lib/trace-cmd/plugins clean
 	$(MAKE) -C $(src)/utest clean
-- 
2.29.2