Fixed an issue with preprocessing of `*.ino` when macros were not handled // Resolve #2972

HISTORY.rst

@@ -12,6 +12,7 @@ PlatformIO Core 4.0
 * Extend project environment configuration in "platformio.ini" with other sections using a new `extends <http://docs.platformio.org/page/projectconf/section_env_advanced.html#extends>`__ option (`issue #2953 <https://github.com/platformio/platformio-core/issues/2953>`_)
 * Fixed an issue with project generator for `CLion IDE <http://docs.platformio.org/page/ide/clion.html>`__ when 2 environments were used (`issue #2824 <https://github.com/platformio/platformio-core/issues/2824>`_)
 * Fixed default PIO Unified Debugger configuration for `J-Link probe <http://docs.platformio.org/en/latest/plus/debug-tools/jlink.html>`__
+* Fixed an issue with preprocessing of ``*.ino`` files when macros were not handled (`issue #2972 <https://github.com/platformio/platformio-core/issues/2972>`_)
 
 4.0.3 (2019-08-30)
 ~~~~~~~~~~~~~~~~~~

platformio/builder/tools/piolib.py

@@ -816,15 +816,21 @@ class ProjectAsLibBuilder(LibBuilderBase):
 
     def get_search_files(self):
         # project files
-        items = LibBuilderBase.get_search_files(self)
+        search_files = LibBuilderBase.get_search_files(self)
         # test files
         if "__test" in COMMAND_LINE_TARGETS:
-            items.extend([
+            search_files.extend([
                 join("$PROJECTTEST_DIR",
                      item) for item in self.env.MatchSourceFiles(
                          "$PROJECTTEST_DIR", "$PIOTEST_SRC_FILTER")
             ])
-        return items
+        if "arduino" in self.env.get("PIOFRAMEWORK", []):
+            search_files.extend([
+                join(self.src_dir, item)
+                for item in fs.match_src_files(self.src_dir, self.src_filter, (
+                    "ino", "pde"))
+            ])
+        return search_files
 
     @property
     def lib_ldf_mode(self):

platformio/builder/tools/piomisc.py

@@ -88,11 +88,13 @@ class InoToCPPConverter(object):
         tmp_path = mkstemp()[1]
         with open(tmp_path, "w") as fp:
             fp.write(contents)
-        self.env.Execute(
-            self.env.VerboseAction(
-                '$CXX -o "{0}" -x c++ -fpreprocessed -dD -E "{1}"'.format(
-                    out_file, tmp_path),
-                "Converting " + basename(out_file[:-4])))
+        env = self.env.Clone()
+        env.Append(CCFLAGS=["-x", "c++", "-E"])
+        cmd = env["CXXCOM"]\
+            .replace("$TARGET", '"%s"' % out_file)\
+            .replace("$SOURCES", '"%s"' % tmp_path)
+        env.Execute(
+            env.VerboseAction(cmd, "Converting " + basename(out_file[:-4])))
         atexit.register(_delete_file, tmp_path)
         return isfile(out_file)
 

platformio/builder/tools/platformio.py

@@ -63,6 +63,10 @@ def _build_project_deps(env):
     # extra build flags from `platformio.ini`
     projenv.ProcessFlags(env.get("SRC_BUILD_FLAGS"))
 
+    if ("nobuild" not in COMMAND_LINE_TARGETS
+            and "arduino" in projenv.get("PIOFRAMEWORK", [])):
+        projenv.ConvertInoToCpp()
+
     is_test = "__test" in COMMAND_LINE_TARGETS
     if is_test:
         projenv.BuildSources("$BUILDTEST_DIR", "$PROJECTTEST_DIR",
@@ -284,8 +288,6 @@ def BuildFrameworks(env, frameworks):
         if f == "arduino":
             # Arduino IDE appends .o the end of filename
             Builder.match_splitext = scons_patched_match_splitext
-            if "nobuild" not in COMMAND_LINE_TARGETS:
-                env.ConvertInoToCpp()
 
         if f in board_frameworks:
             SConscript(env.GetFrameworkScript(f), exports="env")