cmake: Add support for add_dependencies()

Closes: #5983

2 files changed, 43 insertions, 7 deletions

diff --git a/mesonbuild/cmake/interpreter.py b/mesonbuild/cmake/interpreter.py
index 8098bdb..718e70a 100644
--- a/mesonbuild/cmake/interpreter.py
+++ b/mesonbuild/cmake/interpreter.py
@@ -93,8 +93,6 @@ target_type_map = {
     'INTERFACE_LIBRARY': 'header_only'
 }
 
-target_type_requires_trace = ['INTERFACE_LIBRARY']
-
 skip_targets = ['UTILITY']
 
 blacklist_compiler_flags = [
@@ -152,6 +150,8 @@ class ConverterTarget:
         self.install_dir = ''
         self.link_libraries = target.link_libraries
         self.link_flags = target.link_flags + target.link_lang_flags
+        self.depends_raw = []
+        self.depends = []
 
         if target.install_paths:
             self.install_dir = target.install_paths[0]
@@ -227,16 +227,18 @@ class ConverterTarget:
             self.pie = True
 
         # Use the CMake trace, if required
-        if self.type.upper() in target_type_requires_trace:
-            if self.cmake_name in trace.targets:
-                props = trace.targets[self.cmake_name].properties
+        tgt = trace.targets.get(self.cmake_name)
+        if tgt:
+            self.depends_raw = trace.targets[self.cmake_name].depends
+            if self.type.upper() == 'INTERFACE_LIBRARY':
+                props = tgt.properties
 
                 self.includes += props.get('INTERFACE_INCLUDE_DIRECTORIES', [])
                 self.public_compile_opts += props.get('INTERFACE_COMPILE_DEFINITIONS', [])
                 self.public_compile_opts += props.get('INTERFACE_COMPILE_OPTIONS', [])
                 self.link_flags += props.get('INTERFACE_LINK_OPTIONS', [])
-            else:
-                mlog.warning('CMake: Target', mlog.bold(self.cmake_name), 'not found in CMake trace. This can lead to build errors')
+        elif self.type.upper() not in ['EXECUTABLE', 'OBJECT_LIBRARY']:
+            mlog.warning('CMake: Target', mlog.bold(self.cmake_name), 'not found in CMake trace. This can lead to build errors')
 
         # Fix link libraries
         def try_resolve_link_with(path: str) -> Optional[str]:
@@ -337,6 +339,11 @@ class ConverterTarget:
         self.link_libraries = [x for x in self.link_libraries if x.lower() not in blacklist_link_libs]
         self.link_flags = [x for x in self.link_flags if check_flag(x)]
 
+        for i in self.depends_raw:
+            tgt = output_target_map.get(_target_key(i))
+            if tgt:
+                self.depends.append(tgt)
+
     def process_object_libs(self, obj_target_list: List['ConverterTarget']):
         # Try to detect the object library(s) from the generated input sources
         temp = [x for x in self.generated if isinstance(x, str)]
@@ -841,6 +848,7 @@ class CMakeInterpreter:
             generated = []
             generated_filenames = []
             custom_targets = []
+            dependencies = []
             for i in tgt.link_with:
                 assert(isinstance(i, ConverterTarget))
                 if i.name not in processed:
@@ -851,6 +859,12 @@ class CMakeInterpreter:
                 if i.name not in processed:
                     process_target(i)
                 objec_libs += [extract_tgt(i)]
+            for i in tgt.depends:
+                if not isinstance(i, ConverterCustomTarget):
+                    continue
+                if i.name not in processed:
+                    process_custom_target(i)
+                dependencies += [extract_tgt(i)]
 
             # Generate the source list and handle generated sources
             for i in tgt.sources + tgt.generated:
@@ -920,6 +934,9 @@ class CMakeInterpreter:
                 'include_directories': id_node(inc_var),
             }
 
+            if dependencies:
+                generated += dependencies
+
             # Generate the function nodes
             dir_node = assign(dir_var, function('include_directories', tgt.includes))
             sys_node = assign(sys_var, function('include_directories', tgt.sys_includes, {'is_system': True}))
@@ -959,6 +976,10 @@ class CMakeInterpreter:
                     if x.name not in processed:
                         process_target(x)
                     return extract_tgt(x)
+                if isinstance(x, ConverterCustomTarget):
+                    if x.name not in processed:
+                        process_custom_target(x)
+                    return extract_tgt(x)
                 elif isinstance(x, CustomTargetReference):
                     if x.ctgt.name not in processed:
                         process_custom_target(x.ctgt)
diff --git a/mesonbuild/cmake/traceparser.py b/mesonbuild/cmake/traceparser.py
index 7daef0b..c5e0d93 100644
--- a/mesonbuild/cmake/traceparser.py
+++ b/mesonbuild/cmake/traceparser.py
@@ -43,6 +43,7 @@ class CMakeTarget:
         self.properties = properties
         self.imported = imported
         self.tline = tline
+        self.depends = []
 
     def __repr__(self):
         s = 'CMake TARGET:\n  -- name:      {}\n  -- type:      {}\n  -- imported:  {}\n  -- properties: {{\n{}     }}\n  -- tline: {}'
@@ -89,6 +90,7 @@ class CMakeTraceParser:
             'target_compile_options': self._cmake_target_compile_options,
             'target_include_directories': self._cmake_target_include_directories,
             'target_link_options': self._cmake_target_link_options,
+            'add_dependencies': self._cmake_add_dependencies,
         }
 
         # Primary pass -- parse everything
@@ -398,6 +400,19 @@ class CMakeTraceParser:
 
                 self.targets[i].properties[name] = value
 
+    def _cmake_add_dependencies(self, tline: CMakeTraceLine) -> None:
+        # DOC: https://cmake.org/cmake/help/latest/command/add_dependencies.html
+        args = list(tline.args)
+
+        if len(args) < 2:
+            return self._gen_exception('add_dependencies', 'takes at least 2 arguments', tline)
+
+        target = self.targets.get(args[0])
+        if not target:
+            return self._gen_exception('add_dependencies', 'target not found', tline)
+
+        target.depends += args[1:]
+
     def _cmake_target_compile_definitions(self, tline: CMakeTraceLine) -> None:
         # DOC: https://cmake.org/cmake/help/latest/command/target_compile_definitions.html
         self._parse_common_target_options('target_compile_definitions', 'COMPILE_DEFINITIONS', 'INTERFACE_COMPILE_DEFINITIONS', tline)