Simplify makefile boilerplate code.

Don't define ASM_SOURCES variable globally -- reserve that variable to be defined
locally by makefiles, together with C_SOURCES and CPP_SOURCES.
diff --git a/configs/beos b/configs/beos
index 2b74af7..c6e9727 100644
--- a/configs/beos
+++ b/configs/beos
@@ -26,8 +26,8 @@
 		-DUSE_3DNOW_ASM \
 		-DUSE_SSE_ASM
 	
-	ASM_SOURCES = $(X86_SOURCES)
-	ASM_API = $(X86_API)
+	MESA_ASM_SOURCES = $(X86_SOURCES)
+	GLAPI_ASM_SOURCES = $(X86_API)
 
 	CC = gcc
 	CXX = g++
diff --git a/configs/default b/configs/default
index c9be5ec..48ddd29 100644
--- a/configs/default
+++ b/configs/default
@@ -51,7 +51,7 @@
 
 
 # Optional assembly language optimization files for libGL
-ASM_SOURCES = 
+MESA_ASM_SOURCES = 
 
 # GLw widget sources (Append "GLwMDrawA.c" here and add -lXm to GLW_LIB_DEPS in
 # order to build the Motif widget too)
diff --git a/configs/freebsd-dri b/configs/freebsd-dri
index 67d253b..6fc1abb 100644
--- a/configs/freebsd-dri
+++ b/configs/freebsd-dri
@@ -22,7 +22,7 @@
 
 CXXFLAGS = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(DEFINES) -Wall -ansi -pedantic $(ASM_FLAGS) $(X11_INCLUDES) 
 
-ASM_SOURCES = 
+MESA_ASM_SOURCES = 
 
 # Library/program dependencies
 LIBDRM_CFLAGS = `pkg-config --cflags libdrm`
diff --git a/configs/freebsd-dri-amd64 b/configs/freebsd-dri-amd64
index 39341b9..bb6c361 100644
--- a/configs/freebsd-dri-amd64
+++ b/configs/freebsd-dri-amd64
@@ -6,5 +6,5 @@
 CONFIG_NAME = freebsd-dri-x86-64
 
 ASM_FLAGS = -DUSE_X86_64_ASM
-ASM_SOURCES = $(X86-64_SOURCES)
-ASM_API = $(X86-64_API)
+MESA_ASM_SOURCES = $(X86-64_SOURCES)
+GLAPI_ASM_SOURCES = $(X86-64_API)
diff --git a/configs/freebsd-dri-x86 b/configs/freebsd-dri-x86
index af0d27f..9475437 100644
--- a/configs/freebsd-dri-x86
+++ b/configs/freebsd-dri-x86
@@ -9,5 +9,5 @@
 PIC_FLAGS = 
 
 ASM_FLAGS = -DUSE_X86_ASM -DUSE_MMX_ASM -DUSE_3DNOW_ASM -DUSE_SSE_ASM
-ASM_SOURCES = $(X86_SOURCES)
-ASM_API = $(X86_API)
+MESA_ASM_SOURCES = $(X86_SOURCES)
+GLAPI_ASM_SOURCES = $(X86_API)
diff --git a/configs/linux-directfb b/configs/linux-directfb
index dff27f7..2ed94fe 100644
--- a/configs/linux-directfb
+++ b/configs/linux-directfb
@@ -17,8 +17,8 @@
 ifeq ($(HAVE_X86), yes)
      CFLAGS   += -DUSE_X86_ASM -DUSE_MMX_ASM -DUSE_3DNOW_ASM -DUSE_SSE_ASM
      CXXFLAGS += -DUSE_X86_ASM -DUSE_MMX_ASM -DUSE_3DNOW_ASM -DUSE_SSE_ASM
-     ASM_SOURCES = $(X86_SOURCES)
-     ASM_API = $(X86_API)
+     MESA_ASM_SOURCES = $(X86_SOURCES)
+     GLAPI_ASM_SOURCES = $(X86_API)
 endif
 
 # Directories
diff --git a/configs/linux-dri b/configs/linux-dri
index c45b600..67e60cb 100644
--- a/configs/linux-dri
+++ b/configs/linux-dri
@@ -33,7 +33,7 @@
 CXXFLAGS = -Wall $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES)
 
 
-ASM_SOURCES = 
+MESA_ASM_SOURCES = 
 
 # Library/program dependencies
 EXTRA_LIB_PATH=-L/usr/X11R6/lib
diff --git a/configs/linux-dri-ppc b/configs/linux-dri-ppc
index fb87688..a3a3ca8 100644
--- a/configs/linux-dri-ppc
+++ b/configs/linux-dri-ppc
@@ -9,7 +9,7 @@
 PIC_FLAGS = -fPIC
 
 ASM_FLAGS = -DUSE_PPC_ASM -DUSE_VMX_ASM
-ASM_SOURCES = $(PPC_SOURCES)
+MESA_ASM_SOURCES = $(PPC_SOURCES)
 
 # Build only the drivers for cards that exist on PowerPC.  At some point MGA
 # will be added, but not yet.
diff --git a/configs/linux-dri-x86 b/configs/linux-dri-x86
index b196004..ec8242d 100644
--- a/configs/linux-dri-x86
+++ b/configs/linux-dri-x86
@@ -12,6 +12,6 @@
 ARCH_FLAGS = -m32
 
 ASM_FLAGS = -DUSE_X86_ASM -DUSE_MMX_ASM -DUSE_3DNOW_ASM -DUSE_SSE_ASM
-ASM_SOURCES = $(X86_SOURCES)
-ASM_API = $(X86_API)
+MESA_ASM_SOURCES = $(X86_SOURCES)
+GLAPI_ASM_SOURCES = $(X86_API)
 
diff --git a/configs/linux-dri-x86-64 b/configs/linux-dri-x86-64
index 821ab3e..bb56de3 100644
--- a/configs/linux-dri-x86-64
+++ b/configs/linux-dri-x86-64
@@ -8,8 +8,8 @@
 ARCH_FLAGS = -m64
 
 ASM_FLAGS = -DUSE_X86_64_ASM
-ASM_SOURCES = $(X86-64_SOURCES)
-ASM_API = $(X86-64_API)
+MESA_ASM_SOURCES = $(X86-64_SOURCES)
+GLAPI_ASM_SOURCES = $(X86-64_API)
 
 LIB_DIR = lib64
 
diff --git a/configs/linux-dri-xcb b/configs/linux-dri-xcb
index ea4bdf1..fbf9b9b 100644
--- a/configs/linux-dri-xcb
+++ b/configs/linux-dri-xcb
@@ -33,7 +33,7 @@
 CXXFLAGS = -Wall $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES)
 
 
-ASM_SOURCES = 
+MESA_ASM_SOURCES = 
 
 # Library/program dependencies
 EXTRA_LIB_PATH=$(shell pkg-config --libs-only-L x11)
diff --git a/configs/linux-icc b/configs/linux-icc
index 978a45a..d90a1da 100644
--- a/configs/linux-icc
+++ b/configs/linux-icc
@@ -16,7 +16,7 @@
 GLUT_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GLU_LIB) -l$(GL_LIB) -L/usr/X11R6/lib -lX11 -lXmu -lXt -lXi -lm
 APP_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GLUT_LIB) -l$(GLU_LIB) -l$(GL_LIB) -lm
 
-ASM_SOURCES = $(X86_SOURCES)
-ASM_API = $(X86_API)
+MESA_ASM_SOURCES = $(X86_SOURCES)
+GLAPI_ASM_SOURCES = $(X86_API)
 
 
diff --git a/configs/linux-icc-static b/configs/linux-icc-static
index 0c95756..384db3b 100644
--- a/configs/linux-icc-static
+++ b/configs/linux-icc-static
@@ -23,5 +23,5 @@
 GLUT_LIB_DEPS =
 APP_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GLUT_LIB) -l$(GLU_LIB) -l$(GL_LIB) -L/usr/X11R6/lib -lX11 -lXmu -lXt -lXi -lm -lpthread -lcxa -lunwind
 
-ASM_SOURCES = $(X86_SOURCES)
-ASM_API = $(X86_API)
+MESA_ASM_SOURCES = $(X86_SOURCES)
+GLAPI_ASM_SOURCES = $(X86_API)
diff --git a/configs/linux-indirect b/configs/linux-indirect
index bd33345..0c4805e 100644
--- a/configs/linux-indirect
+++ b/configs/linux-indirect
@@ -34,7 +34,7 @@
 CXXFLAGS = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES)
 
 
-ASM_SOURCES = 
+MESA_ASM_SOURCES = 
 
 # Library/program dependencies
 EXTRA_LIB_PATH=-L/usr/X11R6/lib
diff --git a/configs/linux-solo b/configs/linux-solo
index d49b972..3145e12 100644
--- a/configs/linux-solo
+++ b/configs/linux-solo
@@ -33,7 +33,7 @@
 CXXFLAGS = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES)
 
 
-ASM_SOURCES = 
+MESA_ASM_SOURCES = 
 
 # Library/program dependencies
 DRI_LIB_DEPS = -lm -lpthread -lexpat -ldl -L$(TOP)/$(LIB_DIR) $(PCIACCESS_LIB)
diff --git a/configs/linux-solo-x86 b/configs/linux-solo-x86
index 13cab37..5f5aa09 100644
--- a/configs/linux-solo-x86
+++ b/configs/linux-solo-x86
@@ -9,5 +9,5 @@
 PIC_FLAGS = 
 
 ASM_FLAGS = -DUSE_X86_ASM -DUSE_MMX_ASM -DUSE_3DNOW_ASM -DUSE_SSE_ASM
-ASM_SOURCES = $(X86_SOURCES)
-ASM_API = $(X86_API)
+MESA_ASM_SOURCES = $(X86_SOURCES)
+GLAPI_ASM_SOURCES = $(X86_API)
diff --git a/configs/linux-sparc b/configs/linux-sparc
index 9925afc..346d438 100644
--- a/configs/linux-sparc
+++ b/configs/linux-sparc
@@ -5,5 +5,5 @@
 CONFIG_NAME = linux-sparc
 
 #ASM_FLAGS = -DUSE_SPARC_ASM
-#ASM_SOURCES = $(SPARC_SOURCES)
-#ASM_API = $(SPARC_API)
+#MESA_ASM_SOURCES = $(SPARC_SOURCES)
+#GLAPI_ASM_SOURCES = $(SPARC_API)
diff --git a/configs/linux-x86 b/configs/linux-x86
index 18fa061..a4cf4e8 100644
--- a/configs/linux-x86
+++ b/configs/linux-x86
@@ -5,5 +5,5 @@
 CONFIG_NAME = linux-x86
 
 ASM_FLAGS = -DUSE_X86_ASM -DUSE_MMX_ASM -DUSE_3DNOW_ASM -DUSE_SSE_ASM
-ASM_SOURCES = $(X86_SOURCES)
-ASM_API = $(X86_API)
+MESA_ASM_SOURCES = $(X86_SOURCES)
+GLAPI_ASM_SOURCES = $(X86_API)
diff --git a/configs/linux-x86-64 b/configs/linux-x86-64
index 67c0391..c2441e0 100644
--- a/configs/linux-x86-64
+++ b/configs/linux-x86-64
@@ -6,8 +6,8 @@
 
 ARCH_FLAGS = -m64
 
-ASM_SOURCES = $(X86-64_SOURCES)
-ASM_API = $(X86-64_API)
+MESA_ASM_SOURCES = $(X86-64_SOURCES)
+GLAPI_ASM_SOURCES = $(X86-64_API)
 ASM_FLAGS = -DUSE_X86_64_ASM
 
 LIB_DIR = lib64
diff --git a/configs/linux-x86-glide b/configs/linux-x86-glide
index f2f8aee..b963fbd 100644
--- a/configs/linux-x86-glide
+++ b/configs/linux-x86-glide
@@ -15,8 +15,8 @@
 GLUT_CFLAGS = -fexceptions
 
 
-ASM_SOURCES = $(X86_SOURCES)
-ASM_API = $(X86_API)
+MESA_ASM_SOURCES = $(X86_SOURCES)
+GLAPI_ASM_SOURCES = $(X86_API)
 
 # Library/program dependencies
 GL_LIB_DEPS = -L/usr/X11R6/lib -lX11 -lXext -L/usr/local/glide/lib -lglide3x -lm -lpthread
diff --git a/configs/sunos5-gcc b/configs/sunos5-gcc
index 77b293c..3fa13d0 100644
--- a/configs/sunos5-gcc
+++ b/configs/sunos5-gcc
@@ -16,8 +16,8 @@
 
 DEFINES = -D_REENTRANT -DUSE_XSHM
 
-ASM_SOURCES = $(SPARC_SOURCES)
-ASM_API = $(SPARC_API)
+MESA_ASM_SOURCES = $(SPARC_SOURCES)
+GLAPI_ASM_SOURCES = $(SPARC_API)
 ASM_FLAGS = -DUSE_SPARC_ASM
 
 CFLAGS   = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) \