Activate PCH for position independent code.

Cuts compilation time by 30%+

extensions/Makefile.am

@@ -5,6 +5,10 @@ AM_CPPFLAGS = \
 	$(LTDLINCL) \
 	@BOOST_CPPFLAGS@
 
+if BUILD_PCH
+AM_CPPFLAGS += -include $(top_srcdir)/include/rb/rb.pic.h
+endif
+
 AM_LDFLAGS = \
 	-L$(top_srcdir)/ircd \
 	-L$(top_srcdir)/rb \

include/rb/.gitignore

@@ -1 +1,2 @@
 config.h*
+rb.pic.h

include/rb/Makefile.am

@@ -7,14 +7,20 @@ AM_CXXFLAGS = -fpch-deps
 endif
 
 if BUILD_PCH
-BUILT_SOURCES = rb.h.gch
+BUILT_SOURCES = rb.h.gch rb.pic.h.gch
 endif
 
 rb.h.gch:
 	$(CXX) $(CXXFLAGS) $(AM_CXXFLAGS) -o rb.h.gch $(DEFS) $(CPPFLAGS) $(AM_CPPFLAGS) rb.h
 
+rb.pic.h.gch:
+	cp rb.h rb.pic.h
+	$(CXX) $(CXXFLAGS) $(AM_CXXFLAGS) -fPIC -o rb.pic.h.gch $(DEFS) $(CPPFLAGS) $(AM_CPPFLAGS) rb.pic.h
+
 clean-local:
 	rm -f rb.h.gch
+	rm -f rb.pic.h
+	rm -f rb.pic.h.gch
 
 mrproper-local:
 	rm -f config.h

ircd/Makefile.am

@@ -11,6 +11,10 @@ AM_CPPFLAGS = \
 	@LTDLINCL@ \
 	@BOOST_CPPFLAGS@
 
+if BUILD_PCH
+AM_CPPFLAGS += -include $(top_srcdir)/include/rb/rb.pic.h
+endif
+
 if MINGW
 PLATFORM_LDFLAGS = -Wl,--enable-runtime-pseudo-reloc -export-symbols-regex '*'
 endif

modules/Makefile.am

@@ -6,6 +6,10 @@ AM_CPPFLAGS = \
 	$(LTDLINCL) \
 	@BOOST_CPPFLAGS@
 
+if BUILD_PCH
+AM_CPPFLAGS += -include $(top_srcdir)/include/rb/rb.pic.h
+endif
+
 AM_LDFLAGS = \
 	-L$(top_srcdir)/ircd \
 	-L$(top_srcdir)/rb \