Arduino refuses to build with included xxxx.re.ipp files

[CraigMarkwardt]

Device

WEMOS D1 Mini

Version

commit 3a34f06

Bug description

Building with Arduino 1.8.15 leads to compile-time errors. The xxxx.re.ipp include files are not recognized by the Arduino IDE as valid include files for some reason.

However, if I rename the files to have a .h suffix (and change the corresponding include statements) then the build proceeds fine as far as I can tell.

Steps to reproduce

Build current stock release with Arduino IDE 1.8.15

Build tools used

Arduino 1.8.15

Any relevant log output (when available)

Arduino: 1.8.15 (Windows 10), Board: "LOLIN(WEMOS) D1 R2 & mini, 80 MHz, Flash, Disabled (new aborts on oom), Disabled, All SSL ciphers (most compatible), 32KB cache + 32KB IRAM (balanced), Use pgm_read macros for IRAM/PROGMEM, 4MB (FS:2MB OTA:~1019KB), v2 Lower Memory, Disabled, None, Only Sketch, 921600"
...
"C:\\Users\\craig\\AppData\\Local\\Arduino15\\packages\\esp8266\\tools\\xtensa-lx106-elf-gcc\\3.0.4-gcc10.3-1757bed/bin/xtensa-lx106-elf-g++" -D__ets__ -DICACHE_FLASH -U__STRICT_ANSI__ -D_GNU_SOURCE "-IC:\\Users\\craig\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/include" "-IC:\\Users\\craig\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/lwip2/include" "-IC:\\Users\\craig\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2/tools/sdk/libc/xtensa-lx106-elf/include" "-IC:\\Users\\craig\\AppData\\Local\\Temp\\arduino_build_260055/core" -c -w -Werror=return-type -Os -g -free -fipa-pta -mlongcalls -mtext-section-literals -fno-rtti -falign-functions=4 -std=gnu++17 -ffunction-sections -fdata-sections -fno-exceptions -DMMU_IRAM_SIZE=0x8000 -DMMU_ICACHE_SIZE=0x8000 -w -x c++ -E -CC -DNONOSDK22x_190703=1 -DF_CPU=80000000L -DLWIP_OPEN_SRC -DTCP_MSS=536 -DLWIP_FEATURES=1 -DLWIP_IPV6=0 -DARDUINO=10815 -DARDUINO_ESP8266_WEMOS_D1MINI -DARDUINO_ARCH_ESP8266 "-DARDUINO_BOARD=\"ESP8266_WEMOS_D1MINI\"" -DFLASHMODE_DIO -DESP8266 "-IC:\\Users\\craig\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\cores\\esp8266" "-IC:\\Users\\craig\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\variants\\d1_mini" "-IC:\\Users\\craig\\Documents\\Arduino\\libraries\\ArduinoJson\\src" "-IC:\\Users\\craig\\Documents\\Arduino\\libraries\\EEPROM_Rotate\\src" "-IC:\\Users\\craig\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\libraries\\EEPROM" "-IC:\\Users\\craig\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\libraries\\ESP8266WiFi\\src" "-IC:\\Users\\craig\\Documents\\Arduino\\libraries\\ESPAsyncWebServer\\src" "-IC:\\Users\\craig\\Documents\\Arduino\\libraries\\ESPAsyncTCP\\src" "-IC:\\Users\\craig\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\libraries\\Hash\\src" "-IC:\\Users\\craig\\Documents\\Arduino\\libraries\\FauxmoESP\\src" "-IC:\\Users\\craig\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\3.0.2\\libraries\\Wire" "C:\\Users\\craig\\AppData\\Local\\Temp\\arduino_build_260055\\sketch\\led.cpp" -o nul

Alternatives for led_pattern.re.ipp: []led.cpp:366:10: fatal error: led_pattern.re.ipp: No such file or directory



ResolveLibrary(led_pattern.re.ipp)

  366 | #include "led_pattern.re.ipp"  -> candidates: []



      |          ^~~~~~~~~~~~~~~~~~~~

compilation terminated.

...
exit status 1

led_pattern.re.ipp: No such file or directory

Decoded stack trace (when available)

No response

[mcspr]

Have you tried Arduino IDE 1.8.19? I have only tested with arduino-cli and IDE 2.0, but I think latest 1.8 version is supposed to include arduino-cli to fix the issue

Arduino IDE as valid include files for some reason.

IDE copies project files that it deems valid to $TEMP and builds from there. Since it does not have access to the real source tree and only the files it explicitly copied with a hard-coded extension list, you see the missing file error
https://github.com/arduino/arduino-cli/blob/dc13ef6498ae0c39d8185c5f592bb149377a2b83/internal/arduino/globals/globals.go#L35-L50