Showing posts with label android EGL undefined reference to pthread. Show all posts
Showing posts with label android EGL undefined reference to pthread. Show all posts

Sunday, January 15, 2012

linux-android cross-compiling EGL surafce

Here is a simple HelloWorld EGL prog tat creates android window and displays openGL ES Surface
http://jiggawatt.org/badc0de/android/
(main.c)

Here is a Android.mk file for cross compiling this with NDK

LOCAL_PATH:=$(call my-dir)
include $(CLEAR_VARS)
LOCAL_ARM_MODE:=arm
LOCAL_MODULE:=mini
LOCAL_SRC_FILES:=main.c
LOCAL_MODULE_TAGS:=eng debug
LD_LIBRARY_PATH:=/home/shivram/android-ndk-r6b/platforms/android-14/arch-arm/usr/lib
LOCAL_LDLIBS:=\
-L/home/shivram/android-ndk-r6b/platforms/android-14/arch-arm/usr/lib \
-lEGL \
-ldl \
-lsurfaceflinger \

-lhardware \
-lhardware_legacy \
-lpixelflinger \

-lwpa_client \
-lemoji \
-lnetutils \
-ljpeg \
-lc \
-llog \
-lexpat \
-lskia \
-lui \
-lcutils \
-lutils \
-lbinder \
-lsurfaceflinger_client \
-lGLESv1_CM

LD:=/home/shivram/android-ndk-r6b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ld
LOCAL_SHARED_LIBRARIES:=\
EGL \
GLESv1_CM
LOCAL_CFLAGS := \
-DHAVE_CONFIG_H \
-I/home/shivram/android-ndk-r6b/platforms/android-14/arch-arm/usr/include \
-I/home/shivram/android-ndk-r6b/platforms/android-14/arch-arm/usr/include/EGL \
-I/home/shivram/android-ndk-r6b/platforms/android-14/arch-arm/usr/include/GLES \
-DG_THREADS_MANDATORY \
-DG_DISABLE_DEPRECATED \
-Wall \

-Wdeclaration-after-statement \
-Wvla \
-Wpointer-arith \
-Wmissing-declarations \
-Wmissing-prototypes \
-Wredundant-decls \
-Wundef \
-Wwrite-strings \
-Wformat-nonliteral \
-Wformat-security \
-Wold-style-definition \
-Winit-self \
-Wmissing-include-dirs \
-Waddress \
-Waggregate-return \

-Wno-multichar \
-Wnested-externs \
-g \
-nostdlib \
-Bdynamic \
-Wl,-dynamic-linker,/system/bin/linker \
-Wl,--gc-sections \
-Wl,-z,nocopyreloc \
-DGST_DISABLE_DEPRECATED

include $(BUILD_EXECUTABLE)

When we try to compile this.. we get... undefined reference to some pthread functions

To resolve this, the key is to write a wrapper or define those missing functions in ur (main.c) code ;)