create pkg-config and modify makefile

.gitignore

@@ -29,3 +29,4 @@
 !Makefile
 !config.json
 !.github/**
+!concord.pc

Makefile

@@ -1,6 +1,8 @@
 PREFIX          ?= /usr/local
+SHAREDIR        ?= /usr/share
 DESTINCLUDE_DIR  = $(PREFIX)/include/concord
 DESTLIBDIR       = $(PREFIX)/lib
+PKGCONFIGDIR     = $(SHAREDIR)/pkgconfig
 
 SRC_DIR       = src
 INCLUDE_DIR   = include
@@ -43,12 +45,14 @@ install:
 	install -d $(DESTINCLUDE_DIR)
 	install -m 644 $(INCLUDE_DIR)/*.h $(CORE_DIR)/*.h $(GENCODECS_DIR)/*.h \
 	               $(DESTINCLUDE_DIR)
+	install -D concord.pc $(PKGCONFIGDIR)/concord.pc
 
 uninstall:
 	rm -rf $(PREFIX)/include/concord
 	rm -rf $(PREFIX)/lib/libdiscord.a
 	rm -rf $(PREFIX)/lib/libdiscord.so
 	rm -rf $(PREFIX)/lib/libdiscord.dylib
+	rm -f $(PKGCONFIGDIR)/concord.pc
 
 docs:
 	@ $(MAKE) -C $(GENCODECS_DIR) headers

concord.pc

@@ -0,0 +1,11 @@
+prefix=/usr/local
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${exec_prefix}/include
+
+Name: concord
+URL: https://github.com/Cogmasters/concord
+Version: 2.3.0
+Description: A Discord API wrapper library made in C 
+Libs: -L${libdir} -ldiscord
+Cflags: -I${includedir}/concord