--- firefox-47.0/browser/installer/Makefile.in.orig	2016-06-01 06:11:40.000000000 +0200
+++ firefox-47.0/browser/installer/Makefile.in	2016-06-08 09:04:03.153657968 +0200
@@ -160,6 +160,57 @@
 	-diff -u $(DIST)/pack-list.txt $(DIST)/bin-list.txt
 	rm -f $(DIST)/pack-list.txt $(DIST)/bin-list.txt
 
+# Add pkg-config files to the install:: target
+pkg_config_files = \
+	libxul.pc \
+	libxul-embedding.pc \
+	mozilla-js.pc \
+	mozilla-plugin.pc \
+	$(NULL)
+
+ifdef MOZ_NATIVE_NSPR
+NSPR_NAME=nspr
+NSPR_VERSION=$(shell $(NSPR_CONFIG) --version)
+else
+pkg_config_files += mozilla-nspr.pc
+NSPR_NAME=mozilla-nspr
+FULL_NSPR_CFLAGS=-I\$${includedir}
+FULL_NSPR_LIBS=$(subst $(prefix),\$${sdkdir},$(shell $(DEPTH)/nsprpub/config/nspr-config --libs))
+NSPR_VERSION=$(shell $(DEPTH)/nsprpub/config/nspr-config --version)
+endif
+
+MOZ_XUL_LINK = -lxpcomglue_s -lxul
+ifdef JS_SHARED_LIBRARY
+MOZ_JS_LINK = -lmozjs
+else
+FINDPATH=bin
+MOZ_JS_LINK = $(MOZ_XUL_LINK)
+endif
+
+%.pc: $(srcdir)/%.pc.in $(GLOBAL_DEPS)
+	cat $< | sed \
+	-e "s|%prefix%|$(prefix)|" \
+	-e "s|%includedir%|$(includedir)|" \
+	-e "s|%idldir%|$(idldir)|" \
+	-e "s|%sdkdir%|$(sdkdir)|" \
+	-e "s|%libdir%|$(installdir)|" \
+	-e "s|%MOZ_APP_NAME%|$(MOZ_APP_NAME)|" \
+	-e "s|%MOZILLA_VERSION%|$(MOZ_APP_VERSION)|" \
+	-e "s|%WCHAR_CFLAGS%|$(WCHAR_CFLAGS)|" \
+	-e "s|%FULL_NSPR_LIBS%|$(FULL_NSPR_LIBS)|" \
+	-e "s|%FULL_NSPR_CFLAGS%|$(FULL_NSPR_CFLAGS)|" \
+	-e "s|%NSPR_NAME%|$(NSPR_NAME)|" \
+	-e "s|%NSPR_VERSION%|$(NSPR_VERSION)|" \
+	-e "s|%MOZ_XUL_LINK%|$(MOZ_XUL_LINK)|" \
+	-e "s|%MOZ_JS_LINK%|$(MOZ_JS_LINK)|" > $@
+	chmod 644 $@
+
+install:: $(pkg_config_files)
+	@echo pkg_config_file: $(pkg_config_files)
+	$(SYSINSTALL) $(IFLAGS1) $^ $(DESTDIR)$(libdir)/pkgconfig
+
+GARBAGE += $(pkg_config_files)
+
 installer::
 ifdef INSTALLER_DIR
 	$(MAKE) -C $(INSTALLER_DIR)
--- /dev/null	2016-06-08 08:45:36.745941113 +0200
+++ firefox-47.0/browser/installer/libxul-embedding.pc.in	2016-06-08 09:03:04.106295573 +0200
@@ -0,0 +1,11 @@
+prefix=%prefix%
+sdkdir=%sdkdir%
+includedir=%includedir%
+idldir=%idldir%
+
+Name: libxul-embedding
+Description: Static library for version-independent embedding of the Mozilla runtime
+Version: %MOZILLA_VERSION%
+Requires: %NSPR_NAME% >= %NSPR_VERSION%
+Libs: -L${sdkdir}/lib -lxpcomglue -ldl
+Cflags: -DXPCOM_GLUE -I${includedir} %WCHAR_CFLAGS%
--- /dev/null	2016-06-08 08:45:36.745941113 +0200
+++ firefox-47.0/browser/installer/libxul.pc.in	2016-06-08 09:03:44.546774985 +0200
@@ -0,0 +1,12 @@
+prefix=%prefix%
+sdkdir=%sdkdir%
+libdir=%libdir%
+includedir=%includedir%
+idldir=%idldir%
+
+Name: libxul
+Description: The Mozilla Runtime and Embedding Engine
+Version: %MOZILLA_VERSION%
+Requires: %NSPR_NAME% >= %NSPR_VERSION%
+Libs: -L${sdkdir}/lib %MOZ_XUL_LINK%
+Cflags: -I${includedir} %WCHAR_CFLAGS%
--- /dev/null	2016-06-08 08:45:36.745941113 +0200
+++ firefox-47.0/browser/installer/mozilla-js.pc.in	2016-06-08 09:03:36.890018556 +0200
@@ -0,0 +1,10 @@
+prefix=%prefix%
+sdkdir=%sdkdir%
+includedir=%includedir%
+
+Name: JavaScript
+Description: The Mozilla JavaScript Library
+Version: %MOZILLA_VERSION%
+Requires: %NSPR_NAME% >= %NSPR_VERSION%
+Libs: -L${sdkdir}/lib %MOZ_JS_LINK%
+Cflags: -I${includedir} -I${includedir}/js -DXP_UNIX
--- /dev/null	2016-06-08 08:45:36.745941113 +0200
+++ firefox-47.0/browser/installer/mozilla-nspr.pc.in	2016-05-03 07:31:12.000000000 +0200
@@ -0,0 +1,11 @@
+prefix=%prefix%
+sdkdir=%sdkdir%
+includedir=%includedir%/nspr
+
+Name: NSPR
+Description: The Netscape Portable Runtime
+Version: %NSPR_VERSION%
+Libs: %FULL_NSPR_LIBS%
+Cflags: %FULL_NSPR_CFLAGS%
+
+
--- /dev/null	2016-06-08 08:45:36.745941113 +0200
+++ firefox-47.0/browser/installer/mozilla-nss.pc.in	2016-05-03 07:31:12.000000000 +0200
@@ -0,0 +1,10 @@
+prefix=%prefix%
+sdkdir=%sdkdir%
+includedir=%includedir%/nss
+
+Name: NSS
+Description: Mozilla Network Security Services
+Version: %MOZILLA_VERSION%
+Requires: %NSPR_NAME% >= %NSPR_VERSION%
+Libs: -L${sdkdir}/lib -lsmime3 -lssl3 -lnss3 -lnssutil3
+Cflags: -I${includedir}
--- /dev/null	2016-06-08 08:45:36.745941113 +0200
+++ firefox-47.0/browser/installer/mozilla-plugin.pc.in	2016-05-03 07:31:12.000000000 +0200
@@ -0,0 +1,8 @@
+prefix=%prefix%
+sdkdir=%sdkdir%
+includedir=%includedir%
+
+Name: Mozilla Plug-In API
+Description: Mozilla Plug-In API
+Version: %MOZILLA_VERSION%
+Cflags: -I${includedir} -DXP_UNIX