PellesC: Add support for ASM_POASM language assembler

The Pelles C compiler does not support ASM, and the `poasm` assembler
uses a distinct syntax.  Add a dedicated language as we do for similar
cases from other vendors.  Leave documentation commented out for now
because the PellesC toolchain support in general is not yet documented.

Fixes: #27758
Issue: #21536
Co-authored-by: Serguei E. Leontiev <leo@sai.msu.ru>

Help/command/include/SUPPORTED_LANGUAGES.rst

@@ -51,4 +51,9 @@ The supported languages are:
 ``ASM_MASM``
   Microsoft Assembler (x86, x64)
 
+.. FIXME(#21536): ``ASM_POASM``
+  .. versionadded:: 4.4
+
+  Pelles C toolchain assembler.
+
 ``ASM-ATT``

Help/envvar/ASM_DIALECT.rst

@@ -7,9 +7,15 @@ Preferred executable for compiling a specific dialect of assembly language
 files. ``ASM<DIALECT>`` can be one of:
 
 * ``ASM``
+
 * ``ASM_NASM`` (Netwide Assembler)
+
 * ``ASM_MASM`` (Microsoft Assembler)
+
 * ``ASM_MARMASM`` (Microsoft ARM Assembler)
+
+.. FIXME(#21536): * ``ASM_POASM`` (Pelles Macro Assembler)
+
 * ``ASM-ATT`` (Assembler AT&T)
 
 Will only be used by CMake on the first configuration to determine

Help/envvar/ASM_DIALECTFLAGS.rst

@@ -7,9 +7,15 @@ Add default compilation flags to be used when compiling a specific dialect
 of an assembly language.  ``ASM<DIALECT>FLAGS`` can be one of:
 
 * ``ASMFLAGS``
+
 * ``ASM_NASMFLAGS``
+
 * ``ASM_MASMFLAGS``
+
 * ``ASM_MARMASMFLAGS``
+
+.. FIXME(#21536): * ``ASM_POASMFLAGS``
+
 * ``ASM-ATTFLAGS``
 
 .. |CMAKE_LANG_FLAGS| replace:: :variable:`CMAKE_ASM<DIALECT>_FLAGS <CMAKE_<LANG>_FLAGS>`

Modules/CMakeASM_POASMInformation.cmake

@@ -0,0 +1,7 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file LICENSE.rst or https://cmake.org/licensing for details.
+
+set(ASM_DIALECT "_POASM")
+set(CMAKE_ASM${ASM_DIALECT}_SOURCE_FILE_EXTENSIONS asm)
+include(CMakeASMInformation)
+set(ASM_DIALECT)

Modules/CMakeDetermineASMCompiler.cmake

@@ -165,6 +165,10 @@ if(NOT CMAKE_ASM${ASM_DIALECT}_COMPILER_ID)
   set(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_FLAGS_Renesas "-v")
   set(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_REGEX_Renesas "(RX Family C/C\\+\\+ Compiler)|(RL78 Family Compiler)|(RH850 Family Compiler)")
 
+  list(APPEND CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDORS PellesC)
+  set(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_FLAGS_PellesC )
+  set(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID_VENDOR_REGEX_PellesC "Pelles Macro Assembler")
+
   include(CMakeDetermineCompilerId)
   set(userflags)
   CMAKE_DETERMINE_COMPILER_ID_VENDOR(ASM${ASM_DIALECT} "${userflags}")
@@ -263,7 +267,7 @@ if (NOT _CMAKE_TOOLCHAIN_PREFIX)
 endif ()
 
 
-set(_CMAKE_PROCESSING_LANGUAGE "ASM")
+set(_CMAKE_PROCESSING_LANGUAGE "ASM${ASM_DIALECT}")
 include(CMakeFindBinUtils)
 include(Compiler/${CMAKE_ASM${ASM_DIALECT}_COMPILER_ID}-FindBinUtils OPTIONAL)
 unset(_CMAKE_PROCESSING_LANGUAGE)

Modules/CMakeDetermineASM_POASMCompiler.cmake

@@ -0,0 +1,7 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file LICENSE.rst or https://cmake.org/licensing for details.
+
+set(ASM_DIALECT "_POASM")
+set(CMAKE_ASM${ASM_DIALECT}_COMPILER_INIT poasm)
+include(CMakeDetermineASMCompiler)
+unset(ASM_DIALECT)

Modules/CMakeTestASM_POASMCompiler.cmake

@@ -0,0 +1,12 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file LICENSE.rst or https://cmake.org/licensing for details.
+
+# This file is used by EnableLanguage in cmGlobalGenerator to
+# determine that the selected ASM_POASM "compiler" (should be poasm)
+# works. For assembler this can only check whether the compiler has been found,
+# because otherwise there would have to be a separate assembler source file
+# for each assembler on every architecture.
+
+set(ASM_DIALECT "_POASM")
+include(CMakeTestASMCompiler)
+set(ASM_DIALECT)

Modules/Internal/CMakeASM_POASMLinkerInformation.cmake

@@ -0,0 +1,9 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file LICENSE.rst or https://cmake.org/licensing for details.
+
+# Support for the PellesC assembler, poasm
+
+# Load the generic ASMInformation file:
+set(ASM_DIALECT "_POASM")
+include(Internal/CMakeASMLinkerInformation)
+set(ASM_DIALECT)

Modules/Internal/CMakeInspectASM_POASMLinker.cmake

@@ -0,0 +1,7 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file LICENSE.rst or https://cmake.org/licensing for details.
+
+# Load the generic ASM test file:
+set(ASM_DIALECT "_POASM")
+include(Internal/CMakeInspectASMLinker)
+set(ASM_DIALECT)

Modules/Platform/Windows-PellesC-ASM_POASM.cmake

@@ -0,0 +1,8 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file LICENSE.rst or https://cmake.org/licensing for details.
+
+include (Platform/Windows-PellesC)
+__windows_compiler_pellesc(ASM_POASM)
+
+set(CMAKE_ASM_POASM_COMPILE_OBJECT
+  "<CMAKE_ASM_POASM_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -Fo<OBJECT> <SOURCE>")

Tests/CMakeLists.txt

@@ -2142,6 +2142,11 @@ if(BUILD_TESTING)
     ADD_TEST_MACRO(VSMASM VSMASM)
   endif()
 
+  if(CMAKE_C_COMPILER_ID STREQUAL "PellesC")
+    ADD_TEST_MACRO(PellesASM PellesASM)
+    set_property(TEST PellesASM APPEND PROPERTY LABELS "PellesC")
+  endif()
+
   if(CMAKE_GENERATOR MATCHES "Visual Studio")
     if(NOT MSVC60)
       ADD_TEST_MACRO(SBCS SBCS)

Tests/PellesASM/CMakeLists.txt

@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 4.3)
+project(PellesASM LANGUAGES ASM_POASM)
+add_executable(PellesASM main-AMD64.asm)

Tests/PellesASM/main-AMD64.asm

@@ -0,0 +1,19 @@
+extern $printf:proc
+
+.rdata
+fmt db "hello assembler world, %d arguments  given", 0ah, 0
+.code
+main proc
+    sub rsp, 40
+    mov edx, ecx
+    lea rcx, [rip + fmt]
+    call $printf
+    mov eax, 0
+    add rsp, 40
+    ret
+main endp
+
+.drectve SEGMENT
+  db ' -defaultlib:crt64'
+  db ' -defaultlib:kernel32'
+end