Add support for building object files from LLVM assembly sources - close #175

lib/rscons.rb

@@ -156,6 +156,7 @@ require_relative "rscons/builders/lang/asm"
 require_relative "rscons/builders/lang/c"
 require_relative "rscons/builders/lang/cxx"
 require_relative "rscons/builders/lang/d"
+require_relative "rscons/builders/lang/llvm_asm"
 
 # Unbuffer $stdout
 $stdout.sync = true

lib/rscons/builders/lang/llvm_asm.rb

@@ -0,0 +1,10 @@
+Rscons::Builders::Object.register(
+  command: "${LLVMAS_CMD}",
+  direct_command: "${LLVMAS_CMD:direct}",
+  suffix: "${LLVMAS_SUFFIX}",
+  short_description: "Assembling")
+Rscons::Builders::SharedObject.register(
+  command: "${LLVMAS_CMD}",
+  direct_command: "${LLVMAS_CMD:direct}",
+  suffix: "${LLVMAS_SUFFIX}",
+  short_description: "Assembling")

lib/rscons/default_construction_variables.rb

@@ -58,6 +58,11 @@ module Rscons
     "LIBPATH" => [],
     "LIBS" => [],
     "LIBSUFFIX" => ".a",
+    "LLVMAS" => "clang",
+    "LLVMAS_CMD" => %w[${LLVMAS} -c -o ${_TARGET} ${LLVMAS_FLAGS} ${_SOURCES}],
+    "LLVMAS_CMD:direct" => %w[${LLVMAS} -o ${_TARGET} ${LLVMAS_FLAGS} ${LDFLAGS} ${_SOURCES} ${LIBDIRPREFIX}${LIBPATH} ${LIBLINKPREFIX}${LIBS}],
+    "LLVMAS_FLAGS" => [],
+    "LLVMAS_SUFFIX" => ".ll",
     "OBJDUMP" => "objdump",
     "OBJSUFFIX" => %w[.o],
     "PROGSUFFIX" => on_windows ? ".exe" : "",