CMake: handle some conditional compiling

CMakeLists.txt

@@ -36,6 +36,11 @@ option(ENABLE_CCACHE "Enable building with CCACHE" OFF)
 option(ENABLE_SCCACHE "Enable building with SCCACHE" OFF)
 option(ENABLE_FUNCTIONAL_TESTS "Enable functional tests" OFF)
 
+# Needed for environments that can't run executables (i.e. emscripten, wasm)
+option(DISABLE_SPAWN "Disable executable spawn" OFF)
+# Needed for environments that don't have proper thread support (i.e. emscripten, wasm--for now)
+option(DISABLE_ABC_THREADS "Disable ABC threading support" OFF)
+
 set(CXXSTD 17 CACHE STRING "C++ standard to use for the build")
 
 
@@ -101,6 +106,7 @@ endif()
 
 if (ENABLE_ZLIB)
     find_package(ZLIB REQUIRED)
+    add_compile_definitions(YOSYS_ENABLE_ZLIB)
     target_link_libraries(yosys PRIVATE ZLIB::ZLIB)
 endif()
 
@@ -146,6 +152,10 @@ if (ENABLE_PLUGINS)
     target_link_libraries(yosys PRIVATE ${LIBFFI_LIBRARY})
 endif()
 
+if (DISABLE_SPAWN)
+    add_compile_definitions(YOSYS_DISABLE_SPAWN)
+endif()
+
 add_subdirectory(kernel)
 add_subdirectory(libs)
 

frontends/rpc/CMakeLists.txt

@@ -1,7 +1,9 @@
-add_library(yosys_frontends_rpc INTERFACE)
+if (NOT DISABLE_SPAWN)
+    add_library(yosys_frontends_rpc INTERFACE)
 
-target_sources(yosys_frontends_rpc INTERFACE
-    rpc_frontend.cc
-)
+    target_sources(yosys_frontends_rpc INTERFACE
+        rpc_frontend.cc
+    )
 
-target_link_libraries(yosys PRIVATE yosys_frontends_rpc)
+    target_link_libraries(yosys PRIVATE yosys_frontends_rpc)
+endif()

kernel/CMakeLists.txt

@@ -44,8 +44,6 @@ target_sources(yosys_kernel INTERFACE
     ffmerge.h
     fmt.cc
     fmt.h
-    fstdata.cc
-    fstdata.h
     functional.cc
     functional.h
     hashlib.h
@@ -82,4 +80,11 @@ target_sources(yosys_kernel INTERFACE
     yw.h
 )
 
+if (ENABLE_ZLIB)
+target_sources(yosys_kernel INTERFACE
+    fstdata.cc
+    fstdata.h
+)
+endif()
+
 target_link_libraries(yosys PRIVATE yosys_kernel)

libs/CMakeLists.txt

@@ -48,6 +48,14 @@ target_sources(yosys_libs INTERFACE
     minisat/Vec.h
     minisat/XAlloc.h
 
+    subcircuit/subcircuit.cc
+    subcircuit/subcircuit.h
+
+    cxxopts/include/cxxopts.hpp
+)
+
+if (ENABLE_ZLIB)
+target_sources(yosys_libs INTERFACE
     fst/config.h
     fst/fastlz.cc
     fst/fastlz.h
@@ -56,11 +64,7 @@ target_sources(yosys_libs INTERFACE
     fst/fst_win_unistd.h
     fst/lz4.cc
     fst/lz4.h
-
-    subcircuit/subcircuit.cc
-    subcircuit/subcircuit.h
-
-    cxxopts/include/cxxopts.hpp
 )
+endif()
 
 target_link_libraries(yosys PRIVATE yosys_libs)

passes/cmds/CMakeLists.txt

@@ -1,7 +1,6 @@
 add_library(yosys_passes_cmds INTERFACE)
 
 target_sources(yosys_passes_cmds INTERFACE
-    exec.cc
     add.cc
     delete.cc
     design.cc
@@ -37,7 +36,6 @@ target_sources(yosys_passes_cmds INTERFACE
     chtype.cc
     blackbox.cc
     ltp.cc
-    bugpoint.cc
     scratchpad.cc
     logger.cc
     printattrs.cc
@@ -53,4 +51,11 @@ target_sources(yosys_passes_cmds INTERFACE
     setenv.cc
 )
 
+if (NOT DISABLE_SPAWN)
+target_sources(yosys_passes_cmds INTERFACE
+    exec.cc
+    bugpoint.cc
+)
+endif()
+
 target_link_libraries(yosys PRIVATE yosys_passes_cmds)

passes/sat/CMakeLists.txt

@@ -4,7 +4,6 @@ target_sources(yosys_passes_sat INTERFACE
     sat.cc
     freduce.cc
     eval.cc
-    sim.cc
     miter.cc
     expose.cc
     assertpmux.cc
@@ -17,9 +16,20 @@ target_sources(yosys_passes_sat INTERFACE
     cutpoint.cc
     fminit.cc
     recover_names.cc
-    qbfsat.cc
     synthprop.cc
 
 )
 
+if (ENABLE_ZLIB)
+target_sources(yosys_passes_sat INTERFACE
+    sim.cc
+)
+endif()
+
+if (NOT DISABLE_SPAWN)
+target_sources(yosys_passes_sat INTERFACE
+    qbfsat.cc
+)
+endif()
+
 target_link_libraries(yosys PRIVATE yosys_passes_sat)

passes/techmap/CMakeLists.txt

@@ -8,11 +8,6 @@ target_sources(yosys_passes_techmap INTERFACE
     maccmap.cc
     booth.cc
     libparse.cc
-    abc.cc
-    abc9.cc
-    abc9_exe.cc
-    abc9_ops.cc
-    abc_new.cc
     iopadmap.cc
     clkbufmap.cc
     hilomap.cc
@@ -46,7 +41,19 @@ target_sources(yosys_passes_techmap INTERFACE
     clockgate.cc
 )
 
+if (ENABLE_ABC)
+    target_sources(yosys_passes_techmap INTERFACE
+        abc.cc
+        abc9.cc
+        abc9_exe.cc
+        abc9_ops.cc
+        abc_new.cc
+    )
+endif()
+
 target_link_libraries(yosys PRIVATE yosys_passes_techmap)
 
-set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR})
-add_executable(yosys-filterlib filterlib.cc)
+if (NOT DISABLE_SPAWN)
+    set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR})
+    add_executable(yosys-filterlib filterlib.cc)
+endif()