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fix(espidf): glob all main/*.cpp /*.c so helper TUs link 

Multi-file Arduino sketches (robot-desktop-eyes is the canonical
case) define classes and free functions in their own translation
units — Face::Update(), FaceExpression::GoTo_Surprised(),
AsyncTimer::SetIntervalMillis(...), etc. live in Face.cpp,
FaceExpression.cpp, AsyncTimer.cpp respectively.

The espidf_compiler drops every user-supplied .h/.cpp into
project/main/ but the main/CMakeLists.txt only declared
`SRCS "main.cpp"`, so the helper TUs never got compiled and the
linker died with dozens of "undefined reference to ..." entries.

Switch SRCS to a CONFIGURE_DEPENDS glob over the main/ directory
so every .cpp/.c that lands in main/ becomes part of the IDF main
component automatically. CONFIGURE_DEPENDS makes CMake re-evaluate
the glob on every reconfigure, which matters because the persistent
build dir is reused across compiles and the set of helper files
changes per sketch.

Repro: open robot-desktop-eyes, click Compile. Before this commit:
37 linker errors starting at "undefined reference to `u8g2'" and
"undefined reference to `Face::Update()`". After: the helper TUs
compile and the .elf links.
This commit is contained in:
David Montero 2026-05-23 17:30:29 +02:00
parent 0d43c5f892
commit 27c9a2853d
1 changed files with 15 additions and 1 deletions
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16
backend/app/services/esp-idf-template/main/CMakeLists.txt
View File

@ -22,8 +22,22 @@ if(DEFINED ENV{ARDUINO_ESP32_PATH})
list(APPEND _cam_includes "${_cam_root}/conversions/include")
endif()
# Glob every .cpp / .c that the espidf_compiler dropped into main/
# alongside main.cpp. Multi-file Arduino projects (robot-desktop-eyes,
# any wokwi.zip with helper .cpp files, etc.) define classes/free
# functions in their own translation units; if SRCS only names
# "main.cpp" the linker dies with "undefined reference to Foo::bar()"
# for every symbol that lives in a helper .cpp.
#
# CONFIGURE_DEPENDS makes CMake re-glob on every cmake run, which is
# what we want — the persistent build dir is reused across compiles
# and the file set changes per sketch.
file(GLOB _user_srcs CONFIGURE_DEPENDS
"${CMAKE_CURRENT_LIST_DIR}/*.cpp"
"${CMAKE_CURRENT_LIST_DIR}/*.c")
idf_component_register(
SRCS "main.cpp"
SRCS ${_user_srcs}
INCLUDE_DIRS "." ${_cam_includes}
# `driver` brings in the i2c_master_* + i2c_cmd_link_* symbols
# libesp32-camera.a's sccb.c references at link time. arduino-esp32