Add a Makefile for the Perl stuff

Makefile

@@ -11,6 +11,7 @@ SUBS = \
   src/nix-daemon/Makefile \
   src/nix-log2xml/Makefile \
   src/bsdiff-4.3/Makefile \
+  perl/Makefile \
   scripts/Makefile \
   corepkgs/Makefile
 

Makefile.config.in

@@ -16,6 +16,9 @@ exec_prefix = @exec_prefix@
 libdir = @libdir@
 libexecdir = @libexecdir@
 localstatedir = @localstatedir@
+perl = @perl@
+perlbindings = @perlbindings@
+perllibdir = @perllibdir@
 pkglibdir = $(libdir)/$(PACKAGE_NAME)
 prefix = @prefix@
 storedir = @storedir@

mk/lib.mk

@@ -58,4 +58,4 @@ $(foreach script, $(noinst_SCRIPTS), $(eval programs_list += $(script)))
 $(foreach template, $(template_files), $(eval $(call instantiate-template,$(template))))
 
 
-all: $(programs_list)
+all: $(programs_list) $(libs_list)

mk/libraries.mk

@@ -22,11 +22,14 @@ libs_list :=
 # - $(1)_LDFLAGS_PROPAGATED: additional linker flags, also propagated
 #   to the linking of programs/libraries that use this library.
 #
+# - $(1)_FORCE_INSTALL: if defined, the library will be installed even
+#   if it's not needed (i.e. dynamically linked) by a program.
+#
+# - $(1)_INSTALL_DIR: the directory where the library will be
+#   installed.  Defaults to $(libdir).
+#
 # - BUILD_SHARED_LIBS: if equal to ‘1’, a dynamic library will be
 #   built, otherwise a static library.
-#
-# - libdir: the directory where the library will be installed (if
-#   required).
 define build-library =
   $(1)_NAME ?= $(1)
   _d := $$(strip $$($(1)_DIR))
@@ -34,6 +37,8 @@ define build-library =
   $(1)_OBJS := $$(addsuffix .o, $$(basename $$(_srcs)))
   _libs := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_PATH))
 
+  $(1)_INSTALL_DIR ?= $$(libdir)
+
   $(1)_LDFLAGS_USE :=
   $(1)_LDFLAGS_USE_INSTALLED :=
 
@@ -50,8 +55,6 @@ define build-library =
 
     $(1)_LDFLAGS_USE += -L$$(_d) -Wl,-rpath,$$(abspath $$(_d)) -l$$(patsubst lib%,%,$$(strip $$($(1)_NAME)))
 
-    $(1)_INSTALL_DIR := $$(libdir)
-
     $(1)_INSTALL_PATH := $$($(1)_INSTALL_DIR)/$$($(1)_NAME).so
 
     _libs_final := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_INSTALL_PATH))
@@ -63,6 +66,10 @@ define build-library =
 
     $(1)_LDFLAGS_USE_INSTALLED += -L$$($(1)_INSTALL_DIR) -Wl,-rpath,$$($(1)_INSTALL_DIR) -l$$(patsubst lib%,%,$$(strip $$($(1)_NAME)))
 
+    ifdef $(1)_FORCE_INSTALL
+      install: $$($(1)_INSTALL_PATH)
+    endif
+
   else
 
     $(1)_PATH := $$(_d)/$$($(1)_NAME).a

perl/Makefile

@@ -0,0 +1,41 @@
+nix_perl_sources := \
+  $(d)/lib/Nix/Store.pm \
+  $(d)/lib/Nix/Manifest.pm \
+  $(d)/lib/Nix/GeneratePatches.pm \
+  $(d)/lib/Nix/SSH.pm \
+  $(d)/lib/Nix/CopyClosure.pm \
+  $(d)/lib/Nix/Config.pm.in \
+  $(d)/lib/Nix/Utils.pm
+
+nix_perl_modules := $(nix_perl_sources:.in=)
+
+$(foreach x, $(nix_perl_modules), $(eval $(call install-data-in, $(x), $(perllibdir)/Nix)))
+
+ifeq ($(perlbindings), yes)
+
+  $(d)/lib/Nix/Store.cc: $(d)/lib/Nix/Store.xs
+	xsubpp $^ -output $@
+
+  LIBS += Store
+
+  Store_DIR := $(d)/lib/Nix
+
+  Store_SOURCES = Store.cc
+
+  Store_LIBS = libstore
+
+  Store_CXXFLAGS = \
+    -I$(shell $(perl) -e 'use Config; print $$Config{archlibexp};')/CORE \
+    -D_FILE_OFFSET_BITS=64
+
+  Store_ALLOW_UNDEFINED = 1
+
+  Store_FORCE_INSTALL = 1
+
+  Store_INSTALL_DIR = $(perllibdir)/auto/Nix/Store
+
+endif
+
+clean_files += $(d)/lib/Nix/Config.pm $(d)/lib/Nix/Store.cc
+
+dist_files += $(nix_perl_sources)

perl/lib/Nix/Config.pm.in

@@ -1,6 +1,6 @@
 package Nix::Config;
 
-$version = "@version@";
+$version = "@PACKAGE_VERSION@";
 
 $binDir = $ENV{"NIX_BIN_DIR"} || "@bindir@";
 $libexecDir = $ENV{"NIX_LIBEXEC_DIR"} || "@libexecdir@";