Fix "make distcheck"

Makefile.am

@@ -4,3 +4,7 @@ SUBDIRS = \
   src \
   tests
 
+include_HEADERS = \
+  include/rfxcodec_encode.h \
+  include/rfxcodec_decode.h \
+  include/rfxcodec_common.h

src/Makefile.am

@@ -1,4 +1,4 @@
-EXTRA_DIST =
+EXTRA_DIST = $(AMD64_ASM) $(X86_ASM) nasm_lt.sh
 
 EXTRA_DEFINES =
 EXTRA_INCLUDES =
@@ -7,21 +7,27 @@ EXTRA_FLAGS =
 EXTRA_SRC =
 EXTRA_ENCODE_SRC =
 
-if WITH_SIMD_AMD64
-EXTRA_ENCODE_SRC += amd64/cpuid_amd64.asm \
+AMD64_ASM = \
+  amd64/cpuid_amd64.asm \
   amd64/rfxcodec_encode_diff_rlgr1_amd64_sse2.asm \
   amd64/rfxcodec_encode_diff_rlgr3_amd64_sse2.asm \
   amd64/rfxcodec_encode_dwt_shift_amd64_sse2.asm \
   amd64/rfxcodec_encode_dwt_shift_amd64_sse41.asm
-EXTRA_DEFINES += -DSIMD_USE_ACCEL=1 -DRFX_USE_ACCEL_AMD64=1
-endif
 
-if WITH_SIMD_X86
-EXTRA_ENCODE_SRC += x86/cpuid_x86.asm \
+X86_ASM = \
+  x86/cpuid_x86.asm \
   x86/rfxcodec_encode_diff_rlgr1_x86_sse2.asm \
   x86/rfxcodec_encode_diff_rlgr3_x86_sse2.asm \
   x86/rfxcodec_encode_dwt_shift_x86_sse2.asm \
   x86/rfxcodec_encode_dwt_shift_x86_sse41.asm
+
+if WITH_SIMD_AMD64
+EXTRA_ENCODE_SRC += $(AMD64_ASM)
+EXTRA_DEFINES += -DSIMD_USE_ACCEL=1 -DRFX_USE_ACCEL_AMD64=1
+endif
+
+if WITH_SIMD_X86
+EXTRA_ENCODE_SRC += $(X86_ASM)
 EXTRA_DEFINES += -DSIMD_USE_ACCEL=1 -DRFX_USE_ACCEL_X86=1
 endif
 
@@ -30,18 +36,37 @@ EXTRA_INCLUDES += -I$(prefix)/include
 EXTRA_FLAGS += -L$(prefix)/lib -Wl,-rpath -Wl,$(prefix)/lib
 endif
 
-AM_CFLAGS = -I../include $(EXTRA_DEFINES)
+AM_CFLAGS = \
+  -I$(top_srcdir)/include \
+  -I../include \
+  $(EXTRA_DEFINES)
 
 INCLUDES = $(EXTRA_INCLUDES)
 
+noinst_HEADERS = \
+  rfx_bitstream.h \
+  rfxcommon.h \
+  rfxcompose.h \
+  rfxconstants.h \
+  rfxencode_alpha.h \
+  rfxencode_differential.h \
+  rfxencode_dwt.h \
+  rfxencode.h \
+  rfxencode_quantization.h \
+  rfxencode_rlgr1.h \
+  rfxencode_rlgr3.h \
+  rfxencode_tile.h \
+  amd64/funcs_amd64.h \
+  x86/funcs_x86.h
+
 lib_LTLIBRARIES = librfxencode.la
 
 librfxencode_la_LDFLAGS = $(EXTRA_FLAGS)
 
 
 librfxencode_ladir = $(moduledir)
 
-librfxencode_la_SOURCES = rfxencode.c \
+librfxencode_la_SOURCES = $(noinst_HEADERS) rfxencode.c \
   rfxcompose.c rfxencode_tile.c rfxencode_dwt.c \
   rfxencode_quantization.c rfxencode_differential.c \
   rfxencode_rlgr1.c rfxencode_rlgr3.c rfxencode_alpha.c $(EXTRA_ENCODE_SRC)
@@ -50,6 +75,3 @@ librfxencode_la_SOURCES = rfxencode.c \
 	$(LIBTOOL) --mode=compile --tag NASM $(srcdir)/nasm_lt.sh $(NASM) $(NAFLAGS) -I$(srcdir) -I. $< -o $@
 
 librfxencode_la_LIBADD =
-
-include_HEADERS = ../include/rfxcodec_encode.h
-