From c262649291e711c084c5d8fc3fd0eee175f155ff Mon Sep 17 00:00:00 2001
From: Mans Rullgard <mans@mansr.com>
Date: Wed, 3 Oct 2012 13:48:27 +0100
Subject: build: add rules to generate preprocessed source files

This is useful for debugging.  Dependencies for these files are not
generated due to limitations in many compilers.

Signed-off-by: Mans Rullgard <mans@mansr.com>
---
 Makefile    |  3 +++
 configure   |  1 +
 library.mak | 11 +++++++++--
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 5e1dae66aa..91acc4c0b3 100644
--- a/Makefile
+++ b/Makefile
@@ -45,6 +45,9 @@ COMPILE_S = $(call COMPILE,AS)
 %.o: %.S
 	$(COMPILE_S)
 
+%.i: %.c
+	$(CC) $(CCFLAGS) $(CC_E) $<
+
 %.h.c:
 	$(Q)echo '#include "$*.h"' >$@
 
diff --git a/configure b/configure
index 890ff93b3d..0883035d07 100755
--- a/configure
+++ b/configure
@@ -3756,6 +3756,7 @@ ASFLAGS=$ASFLAGS
 AS_C=$AS_C
 AS_O=$AS_O
 CC_C=$CC_C
+CC_E=$CC_E
 CC_O=$CC_O
 LD_O=$LD_O
 LD_LIB=$LD_LIB
diff --git a/library.mak b/library.mak
index 33ec37f1cd..9309c42e5d 100644
--- a/library.mak
+++ b/library.mak
@@ -17,12 +17,19 @@ $(SUBDIR)%-test.o: $(SUBDIR)%-test.c
 $(SUBDIR)%-test.o: $(SUBDIR)%.c
 	$(COMPILE_C)
 
+$(SUBDIR)%-test.i: $(SUBDIR)%-test.c
+	$(CC) $(CCFLAGS) $(CC_E) $<
+
+$(SUBDIR)%-test.i: $(SUBDIR)%.c
+	$(CC) $(CCFLAGS) $(CC_E) $<
+
 $(SUBDIR)x86/%.o: $(SUBDIR)x86/%.asm
 	$(DEPYASM) $(YASMFLAGS) -I $(<D)/ -M -o $@ $< > $(@:.o=.d)
 	$(YASM) $(YASMFLAGS) -I $(<D)/ -o $@ $<
 
-$(OBJS) $(SUBDIR)%.h.o $(TESTOBJS): CPPFLAGS += -DHAVE_AV_CONFIG_H
-$(TESTOBJS): CPPFLAGS += -DTEST
+LIBOBJS := $(OBJS) $(SUBDIR)%.h.o $(TESTOBJS)
+$(LIBOBJS) $(LIBOBJS:.o=.i):   CPPFLAGS += -DHAVE_AV_CONFIG_H
+$(TESTOBJS) $(TESTOBJS:.o=.i): CPPFLAGS += -DTEST
 
 $(SUBDIR)$(LIBNAME): $(OBJS)
 	$(RM) $@
-- 
cgit v1.2.3