gnu: lua: Add patch to generate pkg-config file.

* gnu/packages/patches/lua-pkgconfig.patch: New file.
* gnu/packages/lua.scm (lua)[source]: Add patch.
* gnu-system.am (dist_patch_DATA): Register patch.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu-system.am

@@ -549,6 +549,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/libwmf-CVE-2015-0848+4588+4695+4696.patch \
   gnu/packages/patches/lirc-localstatedir.patch			\
   gnu/packages/patches/lm-sensors-hwmon-attrs.patch		\
+  gnu/packages/patches/lua-pkgconfig.patch                      \
   gnu/packages/patches/lua51-liblua-so.patch                    \
   gnu/packages/patches/luajit-no_ldconfig.patch			\
   gnu/packages/patches/luajit-symlinks.patch			\

gnu/packages/lua.scm

@@ -36,7 +36,8 @@
              (uri (string-append "http://www.lua.org/ftp/lua-"
                                  version ".tar.gz"))
              (sha256
-              (base32 "0b8034v1s82n4dg5rzcn12067ha3nxaylp2vdp8gg08kjsbzphhk"))))
+              (base32 "0b8034v1s82n4dg5rzcn12067ha3nxaylp2vdp8gg08kjsbzphhk"))
+             (patches (list (search-patch "lua-pkgconfig.patch")))))
     (build-system gnu-build-system)
     (inputs `(("readline", readline)))
     (arguments

gnu/packages/patches/lua-pkgconfig.patch

@@ -0,0 +1,109 @@
+Enables generating Lua's pkg-config file.
+
+http://lua-users.org/lists/lua-l/2015-03/msg00338.html
+
+--- a/Makefile	2014-10-30 00:14:41.000000000 +0100
++++ b/Makefile	2015-03-26 18:54:37.678374827 +0100
+@@ -14,6 +14,7 @@
+ INSTALL_BIN= $(INSTALL_TOP)/bin
+ INSTALL_INC= $(INSTALL_TOP)/include
+ INSTALL_LIB= $(INSTALL_TOP)/lib
++INSTALL_PC= $(INSTALL_LIB)/pkgconfig
+ INSTALL_MAN= $(INSTALL_TOP)/man/man1
+ INSTALL_LMOD= $(INSTALL_TOP)/share/lua/$V
+ INSTALL_CMOD= $(INSTALL_TOP)/lib/lua/$V
+@@ -39,9 +40,12 @@
+ PLATS= aix bsd c89 freebsd generic linux macosx mingw posix solaris
+
+ # What to install.
+-TO_BIN= lua luac
++INTERPRETER= lua
++COMPILER= luac
++TO_BIN= $(INTERPRETER) $(COMPILER)
+ TO_INC= lua.h luaconf.h lualib.h lauxlib.h lua.hpp
+ TO_LIB= liblua.a
++TO_PC=  lua-$(V).pc
+ TO_MAN= lua.1 luac.1
+
+ # Lua version and release.
+@@ -51,23 +55,29 @@
+ # Targets start here.
+ all:	$(PLAT)
+
+-$(PLATS) clean:
++$(PLATS):
+ 	cd src && $(MAKE) $@
+
++clean:
++	cd src && $(MAKE) $@
++	$(RM) $(TO_PC)
++
+ test:	dummy
+ 	src/lua -v
+
+-install: dummy
+-	cd src && $(MKDIR) $(INSTALL_BIN) $(INSTALL_INC) $(INSTALL_LIB) $(INSTALL_MAN) $(INSTALL_LMOD) $(INSTALL_CMOD)
++install: dummy $(TO_PC)
++	cd src && $(MKDIR) $(INSTALL_BIN) $(INSTALL_INC) $(INSTALL_LIB) $(INSTALL_PC) $(INSTALL_MAN) $(INSTALL_LMOD) $(INSTALL_CMOD)
+ 	cd src && $(INSTALL_EXEC) $(TO_BIN) $(INSTALL_BIN)
+ 	cd src && $(INSTALL_DATA) $(TO_INC) $(INSTALL_INC)
+ 	cd src && $(INSTALL_DATA) $(TO_LIB) $(INSTALL_LIB)
++	cd src && $(INSTALL_DATA) ../$(TO_PC) $(INSTALL_PC)
+ 	cd doc && $(INSTALL_DATA) $(TO_MAN) $(INSTALL_MAN)
+
+ uninstall:
+ 	cd src && cd $(INSTALL_BIN) && $(RM) $(TO_BIN)
+ 	cd src && cd $(INSTALL_INC) && $(RM) $(TO_INC)
+ 	cd src && cd $(INSTALL_LIB) && $(RM) $(TO_LIB)
++	cd src && cd $(INSTALL_PC)  && $(RM) $(TO_PC)
+ 	cd doc && cd $(INSTALL_MAN) && $(RM) $(TO_MAN)
+
+ local:
+@@ -90,11 +100,13 @@
+ 	@echo "TO_BIN= $(TO_BIN)"
+ 	@echo "TO_INC= $(TO_INC)"
+ 	@echo "TO_LIB= $(TO_LIB)"
++	@echo "TO_PC= $(TO_PC)"
+ 	@echo "TO_MAN= $(TO_MAN)"
+ 	@echo "INSTALL_TOP= $(INSTALL_TOP)"
+ 	@echo "INSTALL_BIN= $(INSTALL_BIN)"
+ 	@echo "INSTALL_INC= $(INSTALL_INC)"
+ 	@echo "INSTALL_LIB= $(INSTALL_LIB)"
++	@echo "INSTALL_PC= $(INSTALL_PC)"
+ 	@echo "INSTALL_MAN= $(INSTALL_MAN)"
+ 	@echo "INSTALL_LMOD= $(INSTALL_LMOD)"
+ 	@echo "INSTALL_CMOD= $(INSTALL_CMOD)"
+@@ -103,12 +115,28 @@
+
+ # echo pkg-config data
+ pc:
+-	@echo "version=$R"
+-	@echo "prefix=$(INSTALL_TOP)"
+-	@echo "libdir=$(INSTALL_LIB)"
+-	@echo "includedir=$(INSTALL_INC)"
++	@echo 'prefix=$(INSTALL_TOP)'
++	@echo 'libdir=$(INSTALL_LIB)'
++	@echo 'includedir=$(INSTALL_INC)'
++	@echo 'bindir=$(INSTALL_BIN)'
++	@echo
++	@echo 'INSTALL_LMOD=$(INSTALL_LMOD)'
++	@echo 'INSTALL_CMOD=$(INSTALL_CMOD)'
++	@echo 'INTERPRETER=$${bindir}/$(INTERPRETER)'
++	@echo 'COMPILER=$${bindir}/$(COMPILER)'
++	@echo
++	@echo 'Name: Lua'
++	@echo 'Description: A powerful, fast, lightweight, embeddable scripting language'
++	@echo 'Version: $(R)'
++	@echo
++	@echo 'Libs: -L$${libdir} -llua -lm'
++	@echo 'Cflags: -I$${includedir}'
++
++pkg-config: $(TO_PC)
++$(TO_PC):
++	@$(MAKE) -s pc > $@
+
+ # list targets that do not create files (but not all makes understand .PHONY)
+-.PHONY: all $(PLATS) clean test install local none dummy echo pecho lecho
++.PHONY: all $(PLATS) clean test install local none dummy echo pecho lecho pkg-config
+
+ # (end of Makefile)