On 2015-08-25 18:51, l...@gnu.org wrote:
Looks good, but could you indicate the upstream status of the change in
the patch? (If it’s upstream, just put the VCS URL for instance; if the
patch was written by you, it’d be good to submit it upstream and paste
the mailing list archive URL instead.)

It's neither: it was written by Nicola Fontana and can be found here:

    http://lua-users.org/lists/lua-l/2015-03/msg00338.html

I've simply added the URL atop the patch description. Is this okay?

Could you send an updated path?

Sure, you'll find it attached.

Thanks,

Siniša
From 00fa6555c62927efcb0610ef3cd1afa8ed1298f2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sini=C5=A1a=20Bi=C4=91in?= <sin...@bidin.eu>
Date: Thu, 27 Aug 2015 23:13:30 +0200
Subject: [PATCH] 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.
---
 gnu-system.am                            |   1 +
 gnu/packages/lua.scm                     |   3 +-
 gnu/packages/patches/lua-pkgconfig.patch | 109 +++++++++++++++++++++++++++++++
 3 files changed, 112 insertions(+), 1 deletion(-)
 create mode 100644 gnu/packages/patches/lua-pkgconfig.patch

diff --git a/gnu-system.am b/gnu-system.am
index 130ae36..09e2f02 100644
--- a/gnu-system.am
+++ b/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			\
diff --git a/gnu/packages/lua.scm b/gnu/packages/lua.scm
index 9a3a83f..87f53d1 100644
--- a/gnu/packages/lua.scm
+++ b/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
diff --git a/gnu/packages/patches/lua-pkgconfig.patch b/gnu/packages/patches/lua-pkgconfig.patch
new file mode 100644
index 0000000..449efd9
--- /dev/null
+++ b/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)
-- 
2.5.0

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