ENH: initial support for assembler in cmake, needs testing by our users

Alex

1 files changed, 78 insertions, 0 deletions

diff --git a/Modules/CMakeDetermineASMCompiler.cmake b/Modules/CMakeDetermineASMCompiler.cmake
new file mode 100644
index 0000000000..cf6099d2c6
--- /dev/null
+++ b/Modules/CMakeDetermineASMCompiler.cmake
@@ -0,0 +1,78 @@
+# determine the compiler to use for ASM programs
+
+IF(NOT CMAKE_ASM${ASM_DIALECT}_COMPILER)
+  # prefer the environment variable ASM
+  IF($ENV{ASM${ASM_DIALECT}} MATCHES ".+")
+    SET(CMAKE_ASM${ASM_DIALECT}_COMPILER_INIT "$ENV{ASM${ASM_DIALECT}}")
+  ENDIF($ENV{ASM${ASM_DIALECT}} MATCHES ".+")
+
+  # finally list compilers to try
+  IF(CMAKE_ASM${ASM_DIALECT}_COMPILER_INIT)
+    SET(CMAKE_ASM${ASM_DIALECT}_COMPILER_LIST ${CMAKE_ASM${ASM_DIALECT}_COMPILER_INIT})
+  ELSE(CMAKE_ASM${ASM_DIALECT}_COMPILER_INIT)
+    SET(CMAKE_ASM${ASM_DIALECT}_COMPILER_LIST ${_CMAKE_TOOLCHAIN_PREFIX}as ${_CMAKE_TOOLCHAIN_PREFIX}gas)
+  ENDIF(CMAKE_ASM${ASM_DIALECT}_COMPILER_INIT)
+
+  # Find the compiler.
+  IF (_CMAKE_USER_CXX_COMPILER_PATH OR _CMAKE_USER_C_COMPILER_PATH)
+    FIND_PROGRAM(CMAKE_ASM${ASM_DIALECT}_COMPILER NAMES ${CMAKE_ASM${ASM_DIALECT}_COMPILER_LIST} PATHS ${_CMAKE_USER_C_COMPILER_PATH} ${_CMAKE_USER_CXX_COMPILER_PATH} DOC "Assembler" NO_DEFAULT_PATH)
+  ENDIF (_CMAKE_USER_CXX_COMPILER_PATH OR _CMAKE_USER_C_COMPILER_PATH)
+  FIND_PROGRAM(CMAKE_ASM${ASM_DIALECT}_COMPILER NAMES ${CMAKE_ASM${ASM_DIALECT}_COMPILER_LIST} DOC "Assembler")
+
+ELSE(NOT CMAKE_ASM${ASM_DIALECT}_COMPILER)
+
+  # we only get here if CMAKE_C_COMPILER was specified using -D or a pre-made CMakeCache.txt
+  # (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE
+  #
+  # if a compiler was specified by the user but without path, 
+  # now try to find it with the full path
+  # if it is found, force it into the cache, 
+  # if not, don't overwrite the setting (which was given by the user) with "NOTFOUND"
+  # if the C compiler already had a path, reuse it for searching the CXX compiler
+  GET_FILENAME_COMPONENT(_CMAKE_USER_ASM_COMPILER_PATH "${CMAKE_ASM${ASM_DIALECT}_COMPILER}" PATH)
+  IF(NOT _CMAKE_USER_ASM_COMPILER_PATH)
+    FIND_PROGRAM(CMAKE_ASM${ASM_DIALECT}_COMPILER_WITH_PATH NAMES ${CMAKE_ASM${ASM_DIALECT}_COMPILER})
+    MARK_AS_ADVANCED(CMAKE_ASM${ASM_DIALECT}_COMPILER_WITH_PATH)
+    IF(CMAKE_ASM${ASM_DIALECT}_COMPILER_WITH_PATH)
+      SET(CMAKE_ASM${ASM_DIALECT}_COMPILER ${CMAKE_ASM${ASM_DIALECT}_COMPILER_WITH_PATH} CACHE FILEPATH "Assembler" FORCE)
+    ENDIF(CMAKE_ASM${ASM_DIALECT}_COMPILER_WITH_PATH)
+  ENDIF(NOT _CMAKE_USER_ASM${ASM_DIALECT}_COMPILER_PATH)
+ENDIF(NOT CMAKE_ASM${ASM_DIALECT}_COMPILER)
+MARK_AS_ADVANCED(CMAKE_ASM${ASM_DIALECT}_COMPILER)
+
+IF (NOT _CMAKE_TOOLCHAIN_LOCATION)
+  GET_FILENAME_COMPONENT(_CMAKE_TOOLCHAIN_LOCATION "${CMAKE_ASM${ASM_DIALECT}_COMPILER}" PATH)
+ENDIF (NOT _CMAKE_TOOLCHAIN_LOCATION)
+
+# if we have a gcc cross compiler, they have usually some prefix, like 
+# e.g. powerpc-linux-gcc, arm-elf-gcc or i586-mingw32msvc-gcc
+# the other tools of the toolchain usually have the same prefix
+IF (NOT _CMAKE_TOOLCHAIN_PREFIX)
+  GET_FILENAME_COMPONENT(COMPILER_BASENAME "${CMAKE_ASM${ASM_DIALECT}_COMPILER}" NAME_WE)
+  IF (COMPILER_BASENAME MATCHES "^(.+-)g?as")
+    STRING(REGEX REPLACE "^(.+-)g?as"  "\\1" _CMAKE_TOOLCHAIN_PREFIX "${COMPILER_BASENAME}")
+  ENDIF (COMPILER_BASENAME MATCHES "^(.+-)g?as")
+ENDIF (NOT _CMAKE_TOOLCHAIN_PREFIX)
+
+INCLUDE(CMakeFindBinUtils)
+
+SET(CMAKE_ASM${ASM_DIALECT}_COMPILER_ENV_VAR "ASM")
+
+IF(CMAKE_ASM${ASM_DIALECT}_COMPILER)
+  MESSAGE(STATUS "Found assembler: ${CMAKE_ASM${ASM_DIALECT}_COMPILER}")
+ELSE(CMAKE_ASM${ASM_DIALECT}_COMPILER)
+  MESSAGE(STATUS "Didn't find assembler")
+ENDIF(CMAKE_ASM${ASM_DIALECT}_COMPILER)
+
+
+SET(_CMAKE_ASM_COMPILER "${CMAKE_ASM${ASM_DIALECT}_COMPILER}")
+SET(_CMAKE_ASM_COMPILER_ARG1 "${CMAKE_ASM${ASM_DIALECT}_COMPILER_ARG1}")
+SET(_CMAKE_ASM_COMPILER_ENV_VAR "${CMAKE_ASM${ASM_DIALECT}_COMPILER_ENV_VAR}")
+
+# configure variables set in this file for fast reload later on
+CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeASMCompiler.cmake.in 
+  ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeASM${ASM_DIALECT}Compiler.cmake IMMEDIATE @ONLY)
+
+SET(_CMAKE_ASM_COMPILER)
+SET(_CMAKE_ASM_COMPILER_ARG1)
+SET(_CMAKE_ASM_COMPILER_ENV_VAR)