[TW#28162] Include file esp_https_server.h misses 'extern "C"' when included in C++ sources

[i-franzki]

Environment

• Development Kit: ESP32-PICO-Kit
• Module or chip used: ESP32-PICO-D4
• IDF version v3.3-beta1-134-g1023ff73f
• Build System: Make
• Compiler version: 1.22.0-80-g6c4433a5
• Operating System: Windows
• Power Supply: USB

Problem Description

The include file esp_https_server.h misses the extern "C" { so that it can be included from C++ files:

#ifdef __cplusplus
extern "C" {
#endif

...

#ifdef __cplusplus
}
#endif

Other include files (e.g. esp_http_server.h) already have the extern "C" {.

When missing, the compile works, but the linker does not find the httpd_ssl_start() and httpd_ssl_stop() functions, because they are not available in the C++ namespace.

Expected Behavior

Be able to include esp_https_server.h in C++ source files.

Actual Behavior

Link errors with functions httpd_ssl_start() and httpd_ssl_stop() when included from C++ source files.

Steps to repropduce

See below.

Code to reproduce this issue

USe example '/protocols/https_server' but within an C++ source file:
https://github.com/espressif/esp-idf/blob/master/examples/protocols/https_server/main/main.c

Debug Logs

LD build/test.elf
C:/Msys32/home/ifranzki/esp/test/build/main\libmain.a(httpd.o):(.literal._Z16httpd_initializev+0x48): undefined reference to `httpd_ssl_start(void**, httpd_ssl_config*)'
C:/Msys32/home/ifranzki/esp/test/build/main\libmain.a(httpd.o):(.literal._Z15httpd_terminatev+0x0): undefined reference to `httpd_ssl_stop(void*)'
C:/Msys32/home/ifranzki/esp/test/build/main\libmain.a(httpd.o): In function `httpd_initialize()':
C:/Msys32/home/ifranzki/esp/test/main/httpd.cpp:347: undefined reference to `httpd_ssl_start(void**, httpd_ssl_config*)'
C:/Msys32/home/ifranzki/esp/test/build/main\libmain.a(httpd.o): In function `httpd_terminate()':
C:/Msys32/home/ifranzki/esp/test/main/httpd.cpp:354: undefined reference to `httpd_ssl_stop(void*)'
collect2.exe: error: ld returned 1 exit status
make: *** [C:/Msys32/home/ifranzki/esp/esp-idf/make/project.mk:458: /home/ifranzki/esp/test/build/test.elf] 

Other items if possible

None

[anurag-kar]

@i-franzki Thanks for notifying this issue. Fix will be available soon.