vvp: create libvvp as versioned library

MinGW requires an import library to link against DLLs.
Install a libvvp import library so downstream projects
can link against libvvp on Windows.

Install also a libvvp.pc pkg-config file for the VVP runtime
library. This allows downstream projects to discover the
correct compiler and linker flags, improving cross-compilation
and MinGW support.

Author: rhabacker

configure.ac

@@ -366,5 +366,5 @@ then
 AC_MSG_ERROR(cannot configure white space in libdir: $libdir)
 fi
 AC_MSG_RESULT(ok)
-AC_CONFIG_FILES([Makefile ivlpp/Makefile vhdlpp/Makefile vvp/Makefile vpi/Makefile driver/Makefile driver-vpi/Makefile cadpli/Makefile libveriuser/Makefile tgt-null/Makefile tgt-stub/Makefile tgt-vvp/Makefile tgt-vhdl/Makefile tgt-fpga/Makefile tgt-verilog/Makefile tgt-pal/Makefile tgt-vlog95/Makefile tgt-pcb/Makefile tgt-blif/Makefile tgt-sizer/Makefile])
+AC_CONFIG_FILES([Makefile ivlpp/Makefile vhdlpp/Makefile vvp/Makefile vpi/Makefile driver/Makefile driver-vpi/Makefile cadpli/Makefile libveriuser/Makefile tgt-null/Makefile tgt-stub/Makefile tgt-vvp/Makefile tgt-vhdl/Makefile tgt-fpga/Makefile tgt-verilog/Makefile tgt-pal/Makefile tgt-vlog95/Makefile tgt-pcb/Makefile tgt-blif/Makefile tgt-sizer/Makefile vvp/libvvp.pc])
 AC_OUTPUT

vvp/Makefile.in

@@ -62,9 +62,17 @@ CXXFLAGS = @WARNING_FLAGS@ @WARNING_FLAGS_CXX@ @CXXFLAGS@
 LDFLAGS = @rdynamic@ @LDFLAGS@
 LIBS = @LIBS@ @EXTRALIBS@
 
+LIBVVP_SOVERSION = 1
+LIBVVP_VERSION  = 1.0.0
+
 ifeq (@WIN32@,yes)
 SLDIR=$(bindir)
 SLEXT=dll
+ifeq (@MINGW32@,yes)
+IMPEXT=dll.a
+else
+IMPEXT=lib
+endif
 else
 SLDIR=$(libdir)
 SLEXT=so
@@ -144,8 +152,20 @@ CPPFLAGS+= -fpic
 vvp@EXEEXT@: main.o $(srcdir)/vvp.def libvvp$(suffix).$(SLEXT)
 	$(CXX) $(LDFLAGS) -o vvp@EXEEXT@ main.o -L. $(LDFLAGS) -lvvp$(suffix) $(LIBS)
 
+ifeq (@MINGW32@,yes)
+libvvp$(suffix).$(SLEXT): $O
+	$(CXX) -shared $(LDFLAGS) -o libvvp$(suffix)-$(LIBVVP_SOVERSION).$(SLEXT) -Wl,--out-implib libvvp$(suffix).$(IMPEXT) $O $(LIBS) $(dllib)
+else
 libvvp$(suffix).$(SLEXT): $O
-	$(CXX) -shared $(LDFLAGS) -o libvvp$(suffix).$(SLEXT) $O $(LIBS) $(dllib)
+	$(CXX) -shared $(LDFLAGS) \
+		-Wl,-soname,libvvp$(suffix).$(SLEXT).$(LIBVVP_SOVERSION) \
+		-o libvvp$(suffix).$(SLEXT).$(LIBVVP_VERSION) \
+		$O $(LIBS) $(dllib)
+	ln -sf libvvp$(suffix).$(SLEXT).$(LIBVVP_VERSION) \
+		libvvp$(suffix).$(SLEXT).$(LIBVVP_SOVERSION)
+	ln -sf libvvp$(suffix).$(SLEXT).$(LIBVVP_SOVERSION) \
+		libvvp$(suffix).$(SLEXT)
+endif
 else
 ifeq (@WIN32@,yes)
 # To support cocotb, we export the VPI functions directly. This allows
@@ -216,12 +236,14 @@ INSTALL_DOCDIR = $(mandir)/man1
 INSTALL_PDFDIR = $(prefix)
 endif
 
+pkgconfigdir = $(libdir)/pkgconfig
+
 stamp-config-h: $(srcdir)/config.h.in ../config.status
 	@rm -f $@
 	cd ..; ./config.status --header=vvp/config.h
 config.h: stamp-config-h
 
-install: all installdirs installfiles
+install: all installdirs installfiles installpkgconfig
 
 F = ./vvp@EXEEXT@ $(srcdir)/libvvp.h $(INSTALL_DOC)
 
@@ -234,7 +256,20 @@ installpdf: vvp.pdf installdirs
 installfiles: $(F) | installdirs
 	$(INSTALL_PROGRAM) ./vvp@EXEEXT@ "$(DESTDIR)$(bindir)/vvp$(suffix)@EXEEXT@"
 ifeq (@LIBVVP@,yes)
-	$(INSTALL_PROGRAM) ./libvvp$(suffix).$(SLEXT) "$(DESTDIR)$(SLDIR)/libvvp$(suffix).$(SLEXT)"
+ifeq (@WIN32@,yes)
+	$(INSTALL_PROGRAM) ./libvvp$(suffix)-$(LIBVVP_SOVERSION).$(SLEXT) "$(DESTDIR)$(bindir)/libvvp$(suffix)-$(LIBVVP_SOVERSION).$(SLEXT)"
+	$(INSTALL_PROGRAM) ./libvvp$(suffix).$(IMPEXT) "$(DESTDIR)$(libdir)/libvvp$(suffix).$(IMPEXT)"
+else
+	# Install real library
+	$(INSTALL_PROGRAM) ./libvvp$(suffix).$(SLEXT).$(LIBVVP_VERSION) \
+	  "$(DESTDIR)$(SLDIR)/libvvp$(suffix).$(SLEXT).$(LIBVVP_VERSION)"
+	# SONAME symlink (runtime)
+	ln -sf libvvp$(suffix).$(SLEXT).$(LIBVVP_VERSION) \
+	  "$(DESTDIR)$(SLDIR)/libvvp$(suffix).$(SLEXT).$(LIBVVP_SOVERSION)"
+	# Linker symlink (devel)
+	ln -sf libvvp$(suffix).$(SLEXT).$(LIBVVP_SOVERSION) \
+	  "$(DESTDIR)$(SLDIR)/libvvp$(suffix).$(SLEXT)"
+endif
 	$(INSTALL_DATA) $(srcdir)/libvvp.h "$(DESTDIR)$(includedir)/libvvp.h"
 endif
 
@@ -244,6 +279,9 @@ installdirs: $(srcdir)/../mkinstalldirs
 		"$(DESTDIR)$(INSTALL_DOCDIR)" \
 		"$(DESTDIR)$(INSTALL_PDFDIR)"
 
+installpkgconfig:
+	$(INSTALL) -d $(DESTDIR)$(pkgconfigdir)
+	$(INSTALL_DATA) libvvp.pc $(DESTDIR)$(pkgconfigdir)
 
 uninstall: $(UNINSTALL32)
 	rm -f "$(DESTDIR)$(bindir)/vvp$(suffix)@EXEEXT@"

vvp/libvvp.pc.in

@@ -0,0 +1,9 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libvvp
+Description: Icarus Verilog VVP runtime library
+Libs: -L${libdir} -lvvp
+Cflags: -I${includedir}/iverilog