From 513c5c3ce6d8fd3878759398748638a1937f54d4 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sun, 24 Apr 2016 12:52:34 -0400
Subject: build system: added library version support.

---
 Makefile.in           | 18 ++++++++++++++----
 project/defs.mk       | 17 ++++++++++++++---
 project/version.mk    | 42 ++++++++++++++++++++++++++++++++++++++++++
 sysinfo/os/any-os.mk  |  1 +
 sysinfo/os/bsd.mk     |  1 +
 sysinfo/os/darwin.mk  |  1 +
 sysinfo/os/linux.mk   |  1 +
 sysinfo/os/midipix.mk |  1 +
 sysinfo/os/mingw.mk   |  1 +
 9 files changed, 76 insertions(+), 7 deletions(-)
 create mode 100644 project/version.mk

diff --git a/Makefile.in b/Makefile.in
index 3776f57..869b090 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -70,6 +70,7 @@ include $(PROJECT_DIR)/sysinfo/compiler/$(COMPILER).mk
 include $(PROJECT_DIR)/sysinfo/toolchain/$(TOOLCHAIN).mk
 
 include $(PROJECT_DIR)/project/defs.mk
+include $(PROJECT_DIR)/project/version.mk
 include $(PROJECT_DIR)/project/tree.mk
 include $(PROJECT_DIR)/project/depends.mk
 include $(PROJECT_DIR)/project/headers.mk
@@ -89,7 +90,7 @@ src/%.lo: 	$(PROJECT_DIR)/src/%.c $(ALL_HEADERS) host.tag dirs.tag
 src/%.o: 	$(PROJECT_DIR)/src/%.c $(ALL_HEADERS) host.tag dirs.tag
 		$(CC) -c -o $@ $< $(CFLAGS_STATIC)
 
-lib/%$(OS_LIB_SUFFIX):
+lib/%$(OS_LIB_SUFFIX)$(VER_XYZ):
 		$(CC) -shared -o $@ $^ $(LDFLAGS_SHARED)
 
 lib/%$(OS_ARCHIVE_EXT):
@@ -105,13 +106,15 @@ install:	install-libs install-headers install-app install-extras
 app:		default-app
 
 
-install-libs:	install-shared install-static install-implib install-libs-extras
+install-libs:	install-shared install-static install-libs-extras
 
 install-headers:shared static
 		mkdir -p $(DESTDIR)$(INCLUDEDIR)/$(PACKAGE)
 		cp $(API_HEADERS) $(DESTDIR)$(INCLUDEDIR)/$(PACKAGE)
 
-install-shared:	shared install-implib
+install-shared:	shared install-lib install-soname install-solink
+
+install-lib:	shared
 		mkdir -p $(DESTDIR)$(LIBDIR)
 		cp $(SHARED_LIB) $(DESTDIR)$(LIBDIR)
 
@@ -125,12 +128,16 @@ install-app:	app install-app-extras
 
 
 
-shared:		shared-lib shared-implib
+shared:		shared-lib shared-soname shared-solink
 
 static:		static-lib
 
 shared-lib:	shared-objs $(SHARED_LIB)
 
+shared-soname:	shared-lib $(SHARED_SONAME)
+
+shared-solink:	shared-lib $(SHARED_SOLINK)
+
 static-lib:	static-objs $(STATIC_LIB)
 
 shared-implib:	shared-lib
@@ -200,6 +207,8 @@ clean:
 		rm -f $(STATIC_OBJS)
 		rm -f $(APP_OBJS)
 		rm -f $(SHARED_LIB)
+		rm -f $(SHARED_SONAME)
+		rm -f $(SHARED_SOLINK)
 		rm -f $(STATIC_LIB)
 		rm -f $(SHARED_IMPLIB)
 		rm -f $(APP)
@@ -256,6 +265,7 @@ clean:
 .display-flags:
 		@echo CFLAGS_DEBUG:'           '$(CFLAGS_DEBUG)
 		@echo CFLAGS_COMMON:'          '$(CFLAGS_COMMON)
+		@echo CFLAGS_VERSION:'         '$(CFLAGS_VERSION)
 		@echo CFLAGS_CMDLINE:'         '$(CFLAGS_CMDLINE)
 		@echo CFLAGS_CONFIG:'          '$(CFLAGS_CONFIG)
 		@echo CFLAGS_SYSROOT:'         '$(CFLAGS_SYSROOT)
diff --git a/project/defs.mk b/project/defs.mk
index f182b87..5a5d60b 100644
--- a/project/defs.mk
+++ b/project/defs.mk
@@ -14,9 +14,16 @@ APP_OBJS	= $(APP_SRCS:.c=.o)
 SHARED_OBJS	= $(COMMON_LOBJS) $(ARCH_LOBJS)
 STATIC_OBJS	= $(COMMON_OBJS)  $(ARCH_OBJS)
 
-SHARED_LIB	= lib/$(OS_LIB_PREFIX)$(PACKAGE)$(OS_LIB_SUFFIX)
-STATIC_LIB	= lib/$(OS_LIB_PREFIX)$(PACKAGE)$(OS_ARCHIVE_EXT)
+DSO_VER		= $(OS_LIB_PREFIX)$(PACKAGE)$(OS_LIB_SUFFIX)$(VER_XYZ)
+DSO_SONAME	= $(OS_LIB_PREFIX)$(PACKAGE)$(OS_LIB_SUFFIX)$(VER_SONAME)
+DSO_SOLINK	= $(OS_LIB_PREFIX)$(PACKAGE)$(OS_LIB_SUFFIX)
+
+SHARED_LIB	= lib/$(DSO_VER)
+SHARED_SONAME	= lib/$(DSO_SONAME)
+SHARED_SOLINK	= lib/$(DSO_SOLINK)
+
 SHARED_IMPLIB	= lib/$(OS_LIB_PREFIX)$(PACKAGE)$(OS_IMPLIB_EXT)
+STATIC_LIB	= lib/$(OS_LIB_PREFIX)$(PACKAGE)$(OS_ARCHIVE_EXT)
 
 APP		= bin/$(OS_APP_PREFIX)$(NICKNAME)$(OS_APP_SUFFIX)
 DEFAULT_APP	= bin/$(OS_APP_PREFIX)$(NICKNAME)-default$(OS_APP_SUFFIX)
@@ -25,7 +32,8 @@ STATIC_APP	= bin/$(OS_APP_PREFIX)$(NICKNAME)-static$(OS_APP_SUFFIX)
 
 CFLAGS		= $(CFLAGS_DEBUG)  $(CFLAGS_CONFIG)  $(CFLAGS_SYSROOT) \
 		   $(CFLAGS_COMMON) $(CFLAGS_CMDLINE) $(CFLAGS_HOST)	\
-		   $(CFLAGS_PATH) $(CFLAGS_OS) $(CFLAGS_SITE)
+		   $(CFLAGS_PATH) $(CFLAGS_OS) $(CFLAGS_SITE)            \
+		   $(CFLAGS_VERSION)
 
 CFLAGS_SHARED	= $(CFLAGS) $(CFLAGS_PIC) $(CFLAGS_SHARED_ATTR)
 CFLAGS_STATIC	= $(CFLAGS) $(CFLAGS_OBJ) $(CFLAGS_STATIC_ATTR)
@@ -35,6 +43,9 @@ LDFLAGS_SHARED	= $(LDFLAGS_DEBUG)   $(LDFLAGS_CONFIG)  $(LDFLAGS_SYSROOT) \
 		   $(LDFLAGS_COMMON)  $(LDFLAGS_CMDLINE) $(LDFLAGS_HOST)    \
 		   $(LDFLAGS_PATH)    $(SHARED_LIB_DEPS) $(LDFLAGS_LAST)
 
+LDFLAGS_SHARED	+= -Wl,-soname
+LDFLAGS_SHARED	+= -Wl,$(DSO_SONAME)
+
 LDFLAGS_APP	= $(LDFLAGS_DEBUG)   $(LDFLAGS_CONFIG)  $(LDFLAGS_SYSROOT) \
 		   $(LDFLAGS_COMMON)  $(LDFLAGS_CMDLINE) $(LDFLAGS_HOST)    \
 		   $(LDFLAGS_PATH)    $(SHARED_APP_DEPS) $(LDFLAGS_LAST)
diff --git a/project/version.mk b/project/version.mk
new file mode 100644
index 0000000..1d58cf3
--- /dev/null
+++ b/project/version.mk
@@ -0,0 +1,42 @@
+include $(PROJECT_DIR)/project/tagver.mk
+
+CFLAGS_VERSION	+= -D$(VER_NAMESPACE)_TAG_VER_MAJOR=$(VER_MAJOR)
+CFLAGS_VERSION	+= -D$(VER_NAMESPACE)_TAG_VER_MINOR=$(VER_MINOR)
+CFLAGS_VERSION	+= -D$(VER_NAMESPACE)_TAG_VER_PATCH=$(VER_PATCH)
+
+VER_XYZ		= .$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH)
+VER_SONAME	= .$(VER_MAJOR)
+
+# libfoo.so (common)
+install-solink:		install-lib
+			rm -f $@.tmp
+			ln -s $(DSO_VER) $@.tmp
+			mv $@.tmp $(DESTDIR)$(LIBDIR)/$(DSO_SOLINK)
+
+$(SHARED_SOLINK):	$(SHARED_LIB)
+			rm -f $@.tmp
+			ln -s $(DSO_VER) $@.tmp
+			mv $@.tmp $@
+
+# libfoo.so.x (symlink)
+ifeq ($(OS_SONAME),symlink)
+$(SHARED_SONAME):	$(SHARED_LIB)
+			rm -f $@.tmp
+			ln -s $(DSO_VER) $@.tmp
+			mv $@.tmp $@
+
+install-soname:		install-lib
+			rm -f $@.tmp
+			ln -s $(DSO_VER) $@.tmp
+			mv $@.tmp $(DESTDIR)$(LIBDIR)/$(DSO_SONAME)
+endif
+
+
+# libfoo.so.x (copy)
+ifeq ($(OS_SONAME),copy)
+install-soname:		install-lib
+			cp $(SHARED_LIB) $(DESTDIR)$(LIBDIR)/$(DSO_SONAME)
+
+$(SHARED_SONAME):	$(SHARED_LIB)
+			cp $(SHARED_LIB) $(SHARED_SONAME)
+endif
diff --git a/sysinfo/os/any-os.mk b/sysinfo/os/any-os.mk
index 0aa0a75..c052f31 100644
--- a/sysinfo/os/any-os.mk
+++ b/sysinfo/os/any-os.mk
@@ -6,5 +6,6 @@ OS_LIB_SUFFIX	= .so
 OS_IMPLIB_EXT	= .invalid
 OS_LIBDEF_EXT	= .invalid
 OS_ARCHIVE_EXT	= .a
+OS_SONAME	= symlink
 
 .PHONY:		$(SHARED_IMPLIB)
diff --git a/sysinfo/os/bsd.mk b/sysinfo/os/bsd.mk
index 1b29c90..694c54f 100644
--- a/sysinfo/os/bsd.mk
+++ b/sysinfo/os/bsd.mk
@@ -6,5 +6,6 @@ OS_LIB_SUFFIX	= .so
 OS_IMPLIB_EXT	= .invalid
 OS_LIBDEF_EXT	= .invalid
 OS_ARCHIVE_EXT	= .a
+OS_SONAME	= symlink
 
 .PHONY:		$(SHARED_IMPLIB)
diff --git a/sysinfo/os/darwin.mk b/sysinfo/os/darwin.mk
index f16b1f1..7ccdfde 100644
--- a/sysinfo/os/darwin.mk
+++ b/sysinfo/os/darwin.mk
@@ -6,6 +6,7 @@ OS_LIB_SUFFIX	= .dylib
 OS_IMPLIB_EXT	= .invalid
 OS_LIBDEF_EXT	= .invalid
 OS_ARCHIVE_EXT	= .a
+OS_SONAME	= symlink
 
 CFLAGS_OS	+= -D_DARWIN_C_SOURCE
 
diff --git a/sysinfo/os/linux.mk b/sysinfo/os/linux.mk
index 2bd6329..e2dcd2e 100644
--- a/sysinfo/os/linux.mk
+++ b/sysinfo/os/linux.mk
@@ -6,5 +6,6 @@ OS_LIB_SUFFIX	= .so
 OS_IMPLIB_EXT	= .invalid
 OS_LIBDEF_EXT	= .invalid
 OS_ARCHIVE_EXT	= .a
+OS_SONAME	= symlink
 
 .PHONY:		$(SHARED_IMPLIB)
diff --git a/sysinfo/os/midipix.mk b/sysinfo/os/midipix.mk
index d1cc534..098ac68 100644
--- a/sysinfo/os/midipix.mk
+++ b/sysinfo/os/midipix.mk
@@ -6,6 +6,7 @@ OS_LIB_SUFFIX	= .so
 OS_IMPLIB_EXT	= .lib.a
 OS_LIBDEF_EXT	= .so.def
 OS_ARCHIVE_EXT	= .a
+OS_SONAME	= copy
 
 LDFLAGS_CONFIG	+= -mout-implib
 
diff --git a/sysinfo/os/mingw.mk b/sysinfo/os/mingw.mk
index be3c106..a40239f 100644
--- a/sysinfo/os/mingw.mk
+++ b/sysinfo/os/mingw.mk
@@ -6,6 +6,7 @@ OS_LIB_SUFFIX	= .dll
 OS_IMPLIB_EXT	= .dll.a
 OS_LIBDEF_EXT	= .def
 OS_ARCHIVE_EXT	= .a
+OS_SONAME	= copy
 
 CFLAGS_PIC	=
 LDFLAGS_CONFIG	+= -Wl,--out-implib,$(SHARED_IMPLIB)
-- 
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