automake: Add a prefix variable for libglsl sources.

See e86c40a84d for reasoning.  In the
process I did s/:=/=/ to shut up automake about nonportable make syntax.

src/glsl/Android.mk

@@ -25,6 +25,7 @@
 
 LOCAL_PATH := $(call my-dir)
 
+GLSL_SRCDIR = .
 include $(LOCAL_PATH)/Makefile.sources
 
 # ---------------------------------------

src/glsl/Makefile

@@ -7,6 +7,7 @@ include $(TOP)/configs/current
 
 LIBNAME = glsl
 
+GLSL_SRCDIR=.
 include Makefile.sources
 
 GLCPP_SOURCES = \

src/glsl/Makefile.sources

@@ -2,92 +2,92 @@
 
 # libglcpp
 
-LIBGLCPP_FILES := \
-	glcpp/pp.c
+LIBGLCPP_FILES = \
+	$(GLSL_SRCDIR)/glcpp/pp.c
 
-LIBGLCPP_GENERATED_FILES := \
-	glcpp/glcpp-lex.c \
-	glcpp/glcpp-parse.c
+LIBGLCPP_GENERATED_FILES = \
+	$(GLSL_SRCDIR)/glcpp/glcpp-lex.c \
+	$(GLSL_SRCDIR)/glcpp/glcpp-parse.c
 
 # libglsl
 
-LIBGLSL_FILES := \
-	strtod.c \
-	ralloc.c
+LIBGLSL_FILES = \
+	$(GLSL_SRCDIR)/strtod.c \
+	$(GLSL_SRCDIR)/ralloc.c
 
-LIBGLSL_CXX_FILES := \
-	ast_expr.cpp \
-	ast_function.cpp \
-	ast_to_hir.cpp \
-	ast_type.cpp \
-	builtin_variables.cpp \
-	glsl_parser_extras.cpp \
-	glsl_types.cpp \
-	glsl_symbol_table.cpp \
-	hir_field_selection.cpp \
-	ir_basic_block.cpp \
-	ir_builder.cpp \
-	ir_clone.cpp \
-	ir_constant_expression.cpp \
-	ir.cpp \
-	ir_expression_flattening.cpp \
-	ir_function_can_inline.cpp \
-	ir_function_detect_recursion.cpp \
-	ir_function.cpp \
-	ir_hierarchical_visitor.cpp \
-	ir_hv_accept.cpp \
-	ir_import_prototypes.cpp \
-	ir_print_visitor.cpp \
-	ir_reader.cpp \
-	ir_rvalue_visitor.cpp \
-	ir_set_program_inouts.cpp \
-	ir_validate.cpp \
-	ir_variable_refcount.cpp \
-	linker.cpp \
-	link_functions.cpp \
-	link_uniforms.cpp \
-	link_uniform_initializers.cpp \
-	loop_analysis.cpp \
-	loop_controls.cpp \
-	loop_unroll.cpp \
-	lower_clip_distance.cpp \
-	lower_discard.cpp \
-	lower_discard_flow.cpp \
-	lower_if_to_cond_assign.cpp \
-	lower_instructions.cpp \
-	lower_jumps.cpp \
-	lower_mat_op_to_vec.cpp \
-	lower_noise.cpp \
-	lower_texture_projection.cpp \
-	lower_variable_index_to_cond_assign.cpp \
-	lower_vec_index_to_cond_assign.cpp \
-	lower_vec_index_to_swizzle.cpp \
-	lower_vector.cpp \
-	lower_output_reads.cpp \
-	opt_algebraic.cpp \
-	opt_array_splitting.cpp \
-	opt_constant_folding.cpp \
-	opt_constant_propagation.cpp \
-	opt_constant_variable.cpp \
-	opt_copy_propagation.cpp \
-	opt_copy_propagation_elements.cpp \
-	opt_dead_code.cpp \
-	opt_dead_code_local.cpp \
-	opt_dead_functions.cpp \
-	opt_function_inlining.cpp \
-	opt_if_simplification.cpp \
-	opt_noop_swizzle.cpp \
-	opt_redundant_jumps.cpp \
-	opt_structure_splitting.cpp \
-	opt_swizzle_swizzle.cpp \
-	opt_tree_grafting.cpp \
-	s_expression.cpp
+LIBGLSL_CXX_FILES = \
+	$(GLSL_SRCDIR)/ast_expr.cpp \
+	$(GLSL_SRCDIR)/ast_function.cpp \
+	$(GLSL_SRCDIR)/ast_to_hir.cpp \
+	$(GLSL_SRCDIR)/ast_type.cpp \
+	$(GLSL_SRCDIR)/builtin_variables.cpp \
+	$(GLSL_SRCDIR)/glsl_parser_extras.cpp \
+	$(GLSL_SRCDIR)/glsl_types.cpp \
+	$(GLSL_SRCDIR)/glsl_symbol_table.cpp \
+	$(GLSL_SRCDIR)/hir_field_selection.cpp \
+	$(GLSL_SRCDIR)/ir_basic_block.cpp \
+	$(GLSL_SRCDIR)/ir_builder.cpp \
+	$(GLSL_SRCDIR)/ir_clone.cpp \
+	$(GLSL_SRCDIR)/ir_constant_expression.cpp \
+	$(GLSL_SRCDIR)/ir.cpp \
+	$(GLSL_SRCDIR)/ir_expression_flattening.cpp \
+	$(GLSL_SRCDIR)/ir_function_can_inline.cpp \
+	$(GLSL_SRCDIR)/ir_function_detect_recursion.cpp \
+	$(GLSL_SRCDIR)/ir_function.cpp \
+	$(GLSL_SRCDIR)/ir_hierarchical_visitor.cpp \
+	$(GLSL_SRCDIR)/ir_hv_accept.cpp \
+	$(GLSL_SRCDIR)/ir_import_prototypes.cpp \
+	$(GLSL_SRCDIR)/ir_print_visitor.cpp \
+	$(GLSL_SRCDIR)/ir_reader.cpp \
+	$(GLSL_SRCDIR)/ir_rvalue_visitor.cpp \
+	$(GLSL_SRCDIR)/ir_set_program_inouts.cpp \
+	$(GLSL_SRCDIR)/ir_validate.cpp \
+	$(GLSL_SRCDIR)/ir_variable_refcount.cpp \
+	$(GLSL_SRCDIR)/linker.cpp \
+	$(GLSL_SRCDIR)/link_functions.cpp \
+	$(GLSL_SRCDIR)/link_uniforms.cpp \
+	$(GLSL_SRCDIR)/link_uniform_initializers.cpp \
+	$(GLSL_SRCDIR)/loop_analysis.cpp \
+	$(GLSL_SRCDIR)/loop_controls.cpp \
+	$(GLSL_SRCDIR)/loop_unroll.cpp \
+	$(GLSL_SRCDIR)/lower_clip_distance.cpp \
+	$(GLSL_SRCDIR)/lower_discard.cpp \
+	$(GLSL_SRCDIR)/lower_discard_flow.cpp \
+	$(GLSL_SRCDIR)/lower_if_to_cond_assign.cpp \
+	$(GLSL_SRCDIR)/lower_instructions.cpp \
+	$(GLSL_SRCDIR)/lower_jumps.cpp \
+	$(GLSL_SRCDIR)/lower_mat_op_to_vec.cpp \
+	$(GLSL_SRCDIR)/lower_noise.cpp \
+	$(GLSL_SRCDIR)/lower_texture_projection.cpp \
+	$(GLSL_SRCDIR)/lower_variable_index_to_cond_assign.cpp \
+	$(GLSL_SRCDIR)/lower_vec_index_to_cond_assign.cpp \
+	$(GLSL_SRCDIR)/lower_vec_index_to_swizzle.cpp \
+	$(GLSL_SRCDIR)/lower_vector.cpp \
+	$(GLSL_SRCDIR)/lower_output_reads.cpp \
+	$(GLSL_SRCDIR)/opt_algebraic.cpp \
+	$(GLSL_SRCDIR)/opt_array_splitting.cpp \
+	$(GLSL_SRCDIR)/opt_constant_folding.cpp \
+	$(GLSL_SRCDIR)/opt_constant_propagation.cpp \
+	$(GLSL_SRCDIR)/opt_constant_variable.cpp \
+	$(GLSL_SRCDIR)/opt_copy_propagation.cpp \
+	$(GLSL_SRCDIR)/opt_copy_propagation_elements.cpp \
+	$(GLSL_SRCDIR)/opt_dead_code.cpp \
+	$(GLSL_SRCDIR)/opt_dead_code_local.cpp \
+	$(GLSL_SRCDIR)/opt_dead_functions.cpp \
+	$(GLSL_SRCDIR)/opt_function_inlining.cpp \
+	$(GLSL_SRCDIR)/opt_if_simplification.cpp \
+	$(GLSL_SRCDIR)/opt_noop_swizzle.cpp \
+	$(GLSL_SRCDIR)/opt_redundant_jumps.cpp \
+	$(GLSL_SRCDIR)/opt_structure_splitting.cpp \
+	$(GLSL_SRCDIR)/opt_swizzle_swizzle.cpp \
+	$(GLSL_SRCDIR)/opt_tree_grafting.cpp \
+	$(GLSL_SRCDIR)/s_expression.cpp
 
 # glsl_compiler
 
-GLSL_COMPILER_CXX_FILES := \
-	standalone_scaffolding.cpp \
-	main.cpp
+GLSL_COMPILER_CXX_FILES = \
+	$(GLSL_SRCDIR)/standalone_scaffolding.cpp \
+	$(GLSL_SRCDIR)/main.cpp
 
 # builtin_compiler
 #
@@ -95,14 +95,14 @@ GLSL_COMPILER_CXX_FILES := \
 # For this to work, a dummy version of builtin_function.cpp,
 # builtin_stubs.cpp, is used.
 
-BUILTIN_COMPILER_CXX_FILES := \
-	builtin_stubs.cpp
+BUILTIN_COMPILER_CXX_FILES = \
+	$(GLSL_SRCDIR)/builtin_stubs.cpp
 
-BUILTIN_COMPILER_GENERATED_CXX_FILES := \
-	glsl_lexer.cpp \
-	glsl_parser.cpp
+BUILTIN_COMPILER_GENERATED_CXX_FILES = \
+	$(GLSL_SRCDIR)/glsl_lexer.cpp \
+	$(GLSL_SRCDIR)/glsl_parser.cpp
 
 # libglsl generated sources
-LIBGLSL_GENERATED_CXX_FILES := \
-	$(BUILTIN_COMPILER_GENERATED_CXX_FILES) \
-	builtin_function.cpp
+LIBGLSL_GENERATED_CXX_FILES = \
+	$(GLSL_SRCDIR)/$(BUILTIN_COMPILER_GENERATED_CXX_FILES) \
+	$(GLSL_SRCDIR)/builtin_function.cpp