From 4796bec4413d3d791117bd9cd9bcdd5fa1b24844 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Sun, 24 Jul 2016 23:50:26 -0700
Subject: [PATCH] Activate PCH for position independent code. Cuts compilation
 time by 30%+

---
 extensions/Makefile.am | 4 ++++
 include/rb/.gitignore  | 1 +
 include/rb/Makefile.am | 8 +++++++-
 ircd/Makefile.am       | 4 ++++
 modules/Makefile.am    | 4 ++++
 5 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/extensions/Makefile.am b/extensions/Makefile.am
index 562cb5865..977d12215 100644
--- a/extensions/Makefile.am
+++ b/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 \
diff --git a/include/rb/.gitignore b/include/rb/.gitignore
index e8daa4398..feea7f655 100644
--- a/include/rb/.gitignore
+++ b/include/rb/.gitignore
@@ -1 +1,2 @@
 config.h*
+rb.pic.h
diff --git a/include/rb/Makefile.am b/include/rb/Makefile.am
index 3d1513c31..49484ad4d 100644
--- a/include/rb/Makefile.am
+++ b/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
diff --git a/ircd/Makefile.am b/ircd/Makefile.am
index 319d9a1a4..478622d4c 100644
--- a/ircd/Makefile.am
+++ b/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
diff --git a/modules/Makefile.am b/modules/Makefile.am
index cdd570341..d6d182c0b 100644
--- a/modules/Makefile.am
+++ b/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 \