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jerryscript/targets/esp-idf/README.md
Akos Kiss d161e2d9ed
Disable libjerry-math by default (#4428) 
Normally, it is more usual and safe to use a toolchain's native
math library. Especially, if multiple components of a project use
math functions, in which case all components should be linked
against the same libm.

The libjerry-math can be used, of course, but as it needs extra
care and consideration, it should be opt-in.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu
2021-01-08 11:37:46 +01:00

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This is a port for espressif's esp-idf (esp32). The MATH, LTO and STRIP options should be disabled, so to build under the IDF toolchain, just run the following command

python tools\build.py --toolchain=cmake/toolchain-esp32.cmake --cmake-param "-GUnix Makefiles" --jerry-cmdline=OFF --jerry-port-default=OFF --lto=OFF --strip=OFF

NB: the MATH, STRIP and LTO might be disabled by platform as well. I strongly suggest limiting heap memorry with '--mem-heap=128' but that really depends on the SRAM avaiulable on your esp32.

Then copy the artefacts 'build/lib/*.a' in an esp-idf component named 'jerryscript' (eg) and use a 'CMakeLists.txt' like this one

# assumes there is a component with this the following
# - set the JERRY_DIR wherever the jerryscript source code (the include files) is
# - a "lib" directory with the 2 libraries below

set(JERRY_DIR ${PROJECT_DIR}/../../jerryscript/)

idf_component_register(
	SRC_DIRS ${JERRY_DIR}/targets/esp-idf
	INCLUDE_DIRS ${JERRY_DIR}/jerry-core/include ${JERRY_DIR}/jerry-ext/include
)

add_prebuilt_library(libjerry-core lib/libjerry-core.a REQUIRES newlib PRIV_REQUIRES ${COMPONENT_NAME})
add_prebuilt_library(libjerry-ext  lib/libjerry-ext.a PRIV_REQUIRES ${COMPONENT_NAME})

target_link_libraries(${COMPONENT_LIB} INTERFACE libjerry-core)
target_link_libraries(${COMPONENT_LIB} INTERFACE libjerry-ext)