misc cleanups and standardizations

tutorials/esp32/minimal/Makefile

@@ -1,9 +1,11 @@
 THISDIR = $(realpath $(CURDIR))
 ROOTDIR = $(realpath $(CURDIR)/../../..)
 DOCKER ?= docker run --rm $(DA) -v $(ROOTDIR):$(ROOTDIR) -w $(THISDIR) espressif/idf
-CMD ?= idf.py build
+CMD ?= idf.py -DCFLAGS_EXTRA="$(CFLAGS_EXTRA)" build
 PORT ?= /dev/ttyUSB0
 
+CFLAGS_EXTRA ?= -DMG_TLS=MG_TLS_BUILTIN
+
 all: example
 
 example:

tutorials/esp32/minimal/main/CMakeLists.txt

@@ -12,3 +12,5 @@ idf_component_register(SRCS "main.c"
                                 espcoredump
                                 nvs_flash
                                 app_update)
+separate_arguments(CFLAGS_EXTRA)
+component_compile_options(${CFLAGS_EXTRA})

tutorials/esp32/minimal/main/mongoose_config.h

@@ -1,4 +1 @@
 #define MG_ARCH MG_ARCH_ESP32
-
-#define MG_TLS MG_TLS_BUILTIN
-//#define MG_TLS MG_TLS_MBED