From 9e5b6c43b13a561b09908d2a57edb6c96e4fedaf Mon Sep 17 00:00:00 2001
From: Jason Parker <jparker@digium.com>
Date: Tue, 12 Feb 2013 14:00:13 -0600
Subject: Add support for building and using shared libraries.

---
 build/rules.mak | 79 ++++++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 56 insertions(+), 23 deletions(-)

(limited to 'build')

diff --git a/build/rules.mak b/build/rules.mak
index 0d35c56..b816643 100644
--- a/build/rules.mak
+++ b/build/rules.mak
@@ -6,17 +6,20 @@ BINDIR = ../bin
 endif
 
 #
-# The full path of output lib file (e.g. ../lib/libapp.a).
-#
-LIB = $($(APP)_LIB)
-
-#
-# The full path of output lib file (e.g. ../lib/libapp.a).
+# The name(s) of output lib file(s) (e.g. libapp.a).
 #
+LIB := $($(APP)_LIB)
 SHLIB = $($(APP)_SHLIB)
+SONAME = $($(APP)_SONAME)
+
+ifeq ($(SHLIB_SUFFIX),so)
+SHLIB_OPT := -shared -Wl,-soname,$(SONAME)
+else
+SHLIB_OPT := 
+endif
 
 #
-# The full path of output executable file (e.g. ../bin/app.exe).
+# The name of output executable file (e.g. app.exe).
 #
 EXE = $($(APP)_EXE)
 
@@ -75,27 +78,46 @@ print_common:
 	@echo RANLIB=$(RANLIB)
 
 print_bin: print_common
-	@echo EXE=$(EXE)
-	@echo BINDIR=$(BINDIR)
-
+	@echo EXE=$(BINDIR)/$(EXE)
+ 	@echo BINDIR=$(BINDIR)
+ 
 print_lib: print_common
-	@echo LIB=$(LIB)
+ifneq ($(LIB),)
+	@echo LIB=$(LIBDIR)/$(LIB)
+endif
+ifneq ($(SHLIB),)
+	@echo SHLIB=$(LIBDIR)/$(SHLIB)
+endif
+ifneq ($(SONAME),)
+	@echo SONAME=$(LIBDIR)/$(SONAME)
+endif
 	@echo LIBDIR=$(LIBDIR)
 
-$(LIB): $(OBJDIRS) $(OBJS) $($(APP)_EXTRA_DEP)
+ifneq ($(LIB),)
+$(LIBDIR)/$(LIB): $(OBJDIRS) $(OBJS) $($(APP)_EXTRA_DEP)
 	if test ! -d $(LIBDIR); then $(subst @@,$(subst /,$(HOST_PSEP),$(LIBDIR)),$(HOST_MKDIR)); fi
-	$(AR) $(LIB) $(OBJS)
-	$(RANLIB) $(LIB)
+	$(AR) $(AR_FLAGS) $@ $(OBJS)
+	$(RANLIB) $@
+endif
 
-$(SHLIB): $(OBJDIRS) $(OBJS) $($(APP)_EXTRA_DEP)
+ifneq ($(SHLIB),)
+$(LIBDIR)/$(SHLIB): $(OBJDIRS) $(OBJS) $($(APP)_EXTRA_DEP)
 	if test ! -d $(LIBDIR); then $(subst @@,$(subst /,$(HOST_PSEP),$(LIBDIR)),$(HOST_MKDIR)); fi
-	$(LD) $(LDOUT)$(subst /,$(HOST_PSEP),$(SHLIB)) \
-	    $(subst /,$(HOST_PSEP),$(OBJS)) $($(APP)_LDFLAGS)
+	$(LD) $(LDOUT)$(subst /,$(HOST_PSEP),$@) \
+	    $(subst /,$(HOST_PSEP),$(OBJS)) $($(APP)_LDFLAGS) $(SHLIB_OPT)
+endif
+ 
+ifneq ($(SONAME),)
+$(LIBDIR)/$(SONAME): $(LIBDIR)/$(SHLIB)
+	ln -sf $(SHLIB) $@
+endif
 
-$(EXE): $(OBJDIRS) $(OBJS) $($(APP)_EXTRA_DEP)
+ifneq ($(EXE),)
+$(BINDIR)/$(EXE): $(OBJDIRS) $(OBJS) $($(APP)_EXTRA_DEP)
 	if test ! -d $(BINDIR); then $(subst @@,$(subst /,$(HOST_PSEP),$(BINDIR)),$(HOST_MKDIR)); fi
-	$(LD) $(LDOUT)$(subst /,$(HOST_PSEP),$(EXE)) \
+	$(LD) $(LDOUT)$(subst /,$(HOST_PSEP),$(BINDIR)/$(EXE)) \
 	    $(subst /,$(HOST_PSEP),$(OBJS)) $($(APP)_LDFLAGS)
+endif
 
 $(OBJDIR)/$(app).o: $(OBJDIRS) $(OBJS)
 	$(CROSS_COMPILE)ld -r -o $@ $(OBJS)
@@ -146,13 +168,13 @@ $(OBJDIR)/%$(OBJEXT): $(SRCDIR)/%.cpp
 		$(subst /,$(HOST_PSEP),$<)
 
 $(OBJDIRS):
-	$(subst @@,$(subst /,$(HOST_PSEP),$@),$(HOST_MKDIR)) 
+	$(subst @@,$(subst /,$(HOST_PSEP),$@),$(HOST_MKDIR))
 
 $(LIBDIR):
-	$(subst @@,$(subst /,$(HOST_PSEP),$(LIBDIR)),$(HOST_MKDIR))
+	$(subst @@,$(subst /,$(HOST_PSEP),$@),$(HOST_MKDIR))
 
 $(BINDIR):
-	$(subst @@,$(subst /,$(HOST_PSEP),$(BINDIR)),$(HOST_MKDIR))
+	$(subst @@,$(subst /,$(HOST_PSEP),$@),$(HOST_MKDIR))
 
 clean:
 	$(subst @@,$(subst /,$(HOST_PSEP),$(OBJDIR)/*),$(HOST_RMR))
@@ -167,7 +189,18 @@ gcov-report:
 	done
 
 realclean: clean
-	$(subst @@,$(subst /,$(HOST_PSEP),$(LIB)) $(subst /,$(HOST_PSEP),$(EXE)),$(HOST_RM))
+ifneq ($(LIB),)
+	$(subst @@,$(subst /,$(HOST_PSEP),$(LIBDIR)/$(LIB)),$(HOST_RM))
+endif
+ifneq ($(SHLIB),)
+	$(subst @@,$(subst /,$(HOST_PSEP),$(LIBDIR)/$(SHLIB)),$(HOST_RM))
+endif
+ifneq ($(SONAME),)
+	$(subst @@,$(subst /,$(HOST_PSEP),$(LIBDIR)/$(SONAME)),$(HOST_RM))
+endif
+ifneq ($(EXE),)
+	$(subst @@,$(subst /,$(HOST_PSEP),$(BINDIR)/$(EXE)),$(HOST_RM))
+endif
 	$(subst @@,$(DEP_FILE),$(HOST_RM))
 ifeq ($(OS_NAME),linux-kernel)
 	rm -f ../lib/$(app).ko
-- 
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