C++: Fix build with nightly Rust

Cargo disallows dashes in library target names (lib.name in Cargo.toml), but when not set it uses
the package name. That meant that dashes snuck in and rust-lang/cargo#12783 fixes that.

The targets Corrosion creates correspond to the library name, so after that change it's slint_cpp.

To make this work with stable cargo, explicitly switch lib.name to slint_cpp.

Author: tronical

api/cpp/CMakeLists.txt

@@ -113,11 +113,11 @@ if (SLINT_BUILD_RUNTIME)
 
     if(BUILD_SHARED_LIBS)
         set(rustc_lib_type "cdylib")
-        set(slint_cpp_impl "slint-cpp-shared")
+        set(slint_cpp_impl "slint_cpp-shared")
         set(cmake_lib_type "SHARED")
     else()
         set(rustc_lib_type "staticlib")
-        set(slint_cpp_impl "slint-cpp-static")
+        set(slint_cpp_impl "slint_cpp-static")
         set(cmake_lib_type "STATIC")
     endif()
 
@@ -142,15 +142,15 @@ if (SLINT_BUILD_RUNTIME)
     # target property doesn't propagate :(
     if (APPLE AND SLINT_IS_TOPLEVEL_BUILD AND BUILD_SHARED_LIBS)
         # corrosion could provide the Cargo.toml package version as a CMake target property.
-        corrosion_add_target_local_rustflags(slint-cpp -Clink-arg=-Wl,-install_name,@rpath/libslint_cpp.dylib,-current_version,${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR},-compatibility_version,${PROJECT_VERSION_MAJOR}.0)
+        corrosion_add_target_local_rustflags(slint_cpp -Clink-arg=-Wl,-install_name,@rpath/libslint_cpp.dylib,-current_version,${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR},-compatibility_version,${PROJECT_VERSION_MAJOR}.0)
         # Set this one to false again explicitely because Corrosion will starting setting this property to true by default.
-        set_target_properties(slint-cpp-shared PROPERTIES IMPORTED_NO_SONAME 0)
-        set_target_properties(slint-cpp-shared PROPERTIES IMPORTED_SONAME libslint_cpp.dylib)
+        set_target_properties(slint_cpp-shared PROPERTIES IMPORTED_NO_SONAME 0)
+        set_target_properties(slint_cpp-shared PROPERTIES IMPORTED_SONAME libslint_cpp.dylib)
     endif()
 
     add_library(Slint INTERFACE)
     add_library(Slint::Slint ALIAS Slint)
-    target_link_libraries(Slint INTERFACE slint-cpp)
+    target_link_libraries(Slint INTERFACE slint_cpp)
     target_compile_features(Slint INTERFACE cxx_std_20)
     if (MSVC)
         target_compile_options(Slint INTERFACE /bigobj)
@@ -167,25 +167,25 @@ if (SLINT_BUILD_RUNTIME)
 
 
     set_property(
-        TARGET slint-cpp
+        TARGET slint_cpp
         APPEND
         PROPERTY CORROSION_ENVIRONMENT_VARIABLES
         "SLINT_GENERATED_INCLUDE_DIR=${CMAKE_CURRENT_BINARY_DIR}/generated_include/"
     )
 
     set_property(
-        TARGET slint-cpp
+        TARGET slint_cpp
         PROPERTY CORROSION_FEATURES
         ${features}
     )
     set_property(
-        TARGET slint-cpp
+        TARGET slint_cpp
         PROPERTY CORROSION_NO_DEFAULT_FEATURES
         ON
     )
 
     if(SLINT_LIBRARY_CARGO_FLAGS)
-        corrosion_set_cargo_flags(slint-cpp ${SLINT_LIBRARY_CARGO_FLAGS})
+        corrosion_set_cargo_flags(slint_cpp ${SLINT_LIBRARY_CARGO_FLAGS})
     endif()
 
     if(SLINT_FEATURE_BACKEND_QT)
@@ -200,14 +200,14 @@ if (SLINT_BUILD_RUNTIME)
 
     if(SLINT_FEATURE_BACKEND_QT AND TARGET Qt::qmake)
         set_property(
-            TARGET slint-cpp
+            TARGET slint_cpp
             APPEND
             PROPERTY CORROSION_ENVIRONMENT_VARIABLES
             QMAKE=$<TARGET_PROPERTY:Qt::qmake,LOCATION>
         )
     else()
         set_property(
-            TARGET slint-cpp
+            TARGET slint_cpp
             APPEND
             PROPERTY CORROSION_ENVIRONMENT_VARIABLES
             SLINT_NO_QT=1
@@ -241,7 +241,7 @@ if (SLINT_BUILD_RUNTIME)
     # to build time.
     if(DEFINED ENV{PKG_CONFIG_SYSROOT_DIR})
         set_property(
-            TARGET slint-cpp
+            TARGET slint_cpp
             APPEND
             PROPERTY CORROSION_ENVIRONMENT_VARIABLES
             "PKG_CONFIG_SYSROOT_DIR=$ENV{PKG_CONFIG_SYSROOT_DIR}"
@@ -253,15 +253,15 @@ if (SLINT_BUILD_RUNTIME)
         find_program(CLANGCXX clang++)
         if(CLANGCC AND NOT DEFINED ENV{CLANGCC})
             set_property(
-                TARGET slint-cpp
+                TARGET slint_cpp
                 APPEND
                 PROPERTY CORROSION_ENVIRONMENT_VARIABLES
                 CLANGCC=${CLANGCC}
             )
         endif()
         if(CLANGCXX AND NOT DEFINED ENV{CLANGCXX})
             set_property(
-                TARGET slint-cpp
+                TARGET slint_cpp
                 APPEND
                 PROPERTY CORROSION_ENVIRONMENT_VARIABLES
                 CLANGCXX=${CLANGCXX}
@@ -289,13 +289,13 @@ if (SLINT_BUILD_RUNTIME)
             if(host_cc)
                 string(REPLACE "-" "_" cargo_host_target_underscore "${Rust_CARGO_HOST_TARGET}")
                 set_property(
-                    TARGET slint-cpp
+                    TARGET slint_cpp
                     APPEND
                     PROPERTY CORROSION_ENVIRONMENT_VARIABLES
                     CC_${cargo_host_target_underscore}=${host_cc}
                 )
                 set_property(
-                    TARGET slint-cpp
+                    TARGET slint_cpp
                     APPEND
                     PROPERTY CORROSION_ENVIRONMENT_VARIABLES
                     CFLAGS_${cargo_host_target_underscore}=
@@ -354,10 +354,10 @@ if (SLINT_BUILD_RUNTIME)
         include(${CMAKE_CURRENT_LIST_DIR}/cmake/SlintMacro.cmake)
     endif()
 
-    export(TARGETS Slint slint-cpp
+    export(TARGETS Slint slint_cpp
         NAMESPACE Slint:: FILE "${CMAKE_BINARY_DIR}/lib/cmake/Slint/SlintTargets.cmake")
     install(EXPORT SlintTargets NAMESPACE Slint:: DESTINATION lib/cmake/Slint)
-    install(TARGETS Slint slint-cpp
+    install(TARGETS Slint slint_cpp
         EXPORT SlintTargets LIBRARY DESTINATION lib PUBLIC_HEADER DESTINATION include/slint)
 
     install(FILES $<TARGET_FILE:${slint_cpp_impl}> TYPE LIB)

api/cpp/Cargo.toml

@@ -20,6 +20,7 @@ links = "slint_cpp"
 [lib]
 path = "lib.rs"
 crate-type = ["lib", "cdylib", "staticlib"]
+name = "slint_cpp"
 
 # Note, these features need to be kept in sync (along with their defaults) in
 # the C++ crate's CMakeLists.txt