Re-add the "json" pkg-config file as a compatibility shim.

Also rename the json-c-uninstalled.pc file.

.gitignore

@@ -11,8 +11,9 @@
 /configure
 /depcomp
 /install-sh
+/json.pc
 /json-c.pc
-/json-uninstalled.pc
+/json-c-uninstalled.pc
 /libtool
 /ltmain.sh
 /Makefile

Makefile.am

@@ -10,6 +10,9 @@ endif
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = json-c.pc
+if ENABLE_OLDNAME_COMPAT
+pkgconfig_DATA += json.pc
+endif
 
 libjson_cincludedir = $(includedir)/json-c
 libjson_cinclude_HEADERS = \

configure.in

@@ -41,9 +41,10 @@ AM_PROG_LIBTOOL
 
 AC_CONFIG_FILES([
 Makefile
+json.pc
 json-c.pc
 tests/Makefile
-json-uninstalled.pc
+json-c-uninstalled.pc
 ])
 
 AC_OUTPUT

json.pc.in

@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: json-c
+Description: JSON implementation in C, compat shim.  Use json-c instead.
+Version: @VERSION@
+Requires: json-c
+Libs:
+Cflags: