# Make fails for external native app sample **URL:** \ **Category:** App Development\ **Created:** [February 5, 2020, 2:21pm UTC](https://forum.webosose.org/t/make-fails-for-external-native-app-sample/1004 "2020-02-05T14:21:08Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![CatalinC](https://avatars.discourse-cdn.com/v4/letter/c/e9c0ed/32.png) [@CatalinC](https://forum.webosose.org/u/CatalinC)\ **Post date:** [February 5, 2020, 2:21pm UTC](https://forum.webosose.org/t/make-fails-for-external-native-app-sample/1004/1 "2020-02-05T14:21:08Z")
Hello WebOSErs, I am currently following this tutorial: > **[Developing External Native Apps](https://www.webosose.org/docs/tutorials/native-apps/developing-external-native-apps/)** > > External native apps are 3rd party native apps that must be installed on the webOS target device. > Unlike other external apps (web or QML), a sample template is not provided for an external native app. So you have to create and implement the source... I have built everything from scratch on Ubuntu 18.04 x64 (Virtual Box on Windows 10 x64 Host) I have followed all the steps of the NDK build and also built the other example "Built-In Native App" successfully. So everything should be fine as far as I can tell. My current issue lies at ## Step 3: Build the Native App, after running "cmake .." cmake .. -- Configuring done -- Generating done -- Build files have been written to: /home/catalin/WebOS/build-webos/com.sample.waylandegl/BUILD comes the make step which fails: make[50%] Building C object CMakeFiles/wayland\_egl.dir/src/wayland\_egl.c.o In file included from /opt/webos-sdk-x86\_64/1.0.g/sysroots/i586-webos-linux/usr/include/sys/cdefs.h:443:0, from /opt/webos-sdk-x86\_64/1.0.g/sysroots/i586-webos-linux/usr/include/features.h:428, from /opt/webos-sdk-x86\_64/1.0.g/sysroots/i586-webos-linux/usr/include/bits/libc-header-start.h:33, from /opt/webos-sdk-x86\_64/1.0.g/sysroots/i586-webos-linux/usr/include/stdio.h:27, from /home/catalin/WebOS/build-webos/com.sample.waylandegl/src/wayland\_egl.c:1: /opt/webos-sdk-x86\_64/1.0.g/sysroots/i586-webos-linux/usr/include/bits/long-double.h:60:10: fatal error: bits/long-double-64.h: No such file or directory compilation terminated. CMakeFiles/wayland\_egl.dir/build.make:62: recipe for target 'CMakeFiles/wayland\_egl.dir/src/wayland\_egl.c.o' failed make[2]: \*\*\* [CMakeFiles/wayland\_egl.dir/src/wayland\_egl.c.o] Error 1 CMakeFiles/Makefile2:72: recipe for target 'CMakeFiles/wayland\_egl.dir/all' failed make[1]: \*\*\* [CMakeFiles/wayland\_egl.dir/all] Error 2 Makefile:83: recipe for target 'all' failed make: \*\*\* [all] Error 2 I have checked for long-double-64.h manually at the .../include/bits folder and it is indeed missing. It includes on the other hand long-double-32.h & long-double.h long-double.h contains the lines: #elif \_\_MHWORDSIZE == 64 #include \ but the file is nowhere to be found. At this point I will note, if not already obvious, that I am building an app for a 32bit image of WebOSE (runing in a virtual box) but my system is 64. I have also looked for long-double-64.h in /opt/webos-sdk-x86\_64/1.0.g/sysroots/x86\_64-webossdk-linux/usr/include/bits$ found only long-double.h which is defined only as a comment: /\* long double is distinct from double, so there is nothing to define here. \*/ I am at a loss currently as to what should I do, any help would be appreciated, Thank you in advance. ---
**Author:** ![NERGI](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.webosose.org/nergi/32/364_2.png) [@NERGI](https://forum.webosose.org/u/NERGI)\ **Post date:** [February 7, 2020, 2:00am UTC](https://forum.webosose.org/t/make-fails-for-external-native-app-sample/1004/2 "2020-02-07T02:00:03Z")
Hi @CatalinC, welcome to the forum. We tested the build for the external native app, but it worked well... So could you give us the following informations? - Returns of - `cat mcf.status` at `build-webos` directory - `git log --name-status HEAD^..HEAD` at `build-webos` directory - Did you enter the command `source environment-setup-i586-webos-linux` ? If so, what is the return of `echo $CC` command? Thanks ---
**Author:** ![CatalinC](https://avatars.discourse-cdn.com/v4/letter/c/e9c0ed/32.png) [@CatalinC](https://forum.webosose.org/u/CatalinC)\ **Post date:** [February 7, 2020, 8:45am UTC](https://forum.webosose.org/t/make-fails-for-external-native-app-sample/1004/3 "2020-02-07T08:45:15Z")
Hi @NERGI, Thanks for taking the time, here is the info you requested: #1 cat mcf.status #!/bin/sh #DO NOT MODIFY! This script is generated by ./mcf. Changes made #here will be lost. Source for this file can be found in #mcf-status.in. ## #Copyright (c) 2008-2014 LG Electronics, Inc. ... (more commented copyright stuff here) #Run this file to recreate the current configuration. set -e exec ./mcf --enable-bb-number-threads=3 --enable-parallel-make=3 --disable-icecc --enable-icecc-parallel-make=0 --enable-icecc-location= --enable-icecc-user-package-blacklist= --enable-icecc-user-class-blacklist= --enable-icecc-user-package-whitelist= --enable-icecc-env-exec= --premirror= --sstatemirror= --enable-buildhistory --enable-buildhistoryauthor='' --enable-network --disable-fetch-premirror-only --disable-generate-mirror-tarballs qemux86 #2 git log --name-status HEAD^..HEAD commit 01a1b618c7aa17a54cb18c664a6707344b7634b6 (HEAD -\> master, tag: v2.3.0, tag: builds/master/154, origin/master, origin/HEAD) Author: Minjae Kim [nate.kim@lge.com](mailto:nate.kim@lge.com) Date: Wed Jan 22 18:50:08 2020 +0900 ``` webos-image: Update layer pins for 2020-01-22 (build 154) meta-webosose as of 2020-01-22 18:19:43 +0900 82acd7142 com.palm.service.devmode=4 704d31936 ose: activitymanager=5 luna-service2-security-conf=14 webos-initscripts=42 ``` M weboslayers.py #3 $ echo $CC i586-webos-linux-gcc -m32 -march=i586 -Werror=return-type --sysroot=/opt/webos-sdk-x86\_64/1.0.g/sysroots/i586-webos-linux As requested. I would also like to note that I did all these in the same terminal from scratch except the mcf command "./mcf -p 3 -b 3 qemux86", which was done prior, as can be seen in the mcf.status If there is anything else you need let me know ! Thanks ---
**Author:** ![sukdo399](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.webosose.org/sukdo399/32/170_2.png) [@sukdo399](https://forum.webosose.org/u/sukdo399)\ **Post date:** [February 10, 2020, 6:54am UTC](https://forum.webosose.org/t/make-fails-for-external-native-app-sample/1004/4 "2020-02-10T06:54:32Z")
Hi. Building an app for 32 bit webOS target qemux86 machine on 64 bit host computer is fine because our cross toolchain (including gcc) run on a host system of a specific architecture (such as x86, x86-64 etc), but they produce binary code (executables) to run on a different architecture (for example, qemux86 or arm etc). It's very weird because I cannot reproduce on my environment(ubuntu 18.04 LTS 64 bit host, qemux86 target and build-webos #154 which are same with you), as @NERGI said. So let us simplify the issue without cmake/make. First, I made very simple c file to check the define \_\_MHWORDSIZE shko@shko-H97-Gaming-3:~/ddd$ cat hello.c #include \ ``` int main() { printf("hello\n"); #if __MHWORDSIZE == 64 printf("64\n"); #endif return 0; } ``` Then, please compile above source by using $CC (after source environment-setup-i586-webos-linux) `$CC hello.c` Then you can get the a.out file, please copy this file to your target emulator using scp etc. If you execute a.out on your target emulator, the result should be `$ ./a.out hello Let us check above simple test then go further with cmake/make also to find the problem. ---
**Author:** ![CatalinC](https://avatars.discourse-cdn.com/v4/letter/c/e9c0ed/32.png) [@CatalinC](https://forum.webosose.org/u/CatalinC)\ **Post date:** [February 10, 2020, 9:11am UTC](https://forum.webosose.org/t/make-fails-for-external-native-app-sample/1004/5 "2020-02-10T09:11:52Z")
Hi @sukdo399 Thanks for your input. I sourced my terminal, created and compiled the small file. As expected the output is: root@qemux86:/home/developer# ./a.out hello ---
**Author:** ![sukdo399](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.webosose.org/sukdo399/32/170_2.png) [@sukdo399](https://forum.webosose.org/u/sukdo399)\ **Post date:** [February 11, 2020, 1:05am UTC](https://forum.webosose.org/t/make-fails-for-external-native-app-sample/1004/6 "2020-02-11T01:05:45Z")
Then, I guess there is a problem during cmake/or make itself. So could you please build using below Makefile? ``` shko@shko-H97-Gaming-3:~/work/wayland_egl_simple_ose/src$ cat Makefile TARGET=wayland_egl OBJECT=wayland_egl.o EGL = `pkg-config --cflags --libs egl` WAYLAND_EGL = `pkg-config --cflags --libs wayland-egl` GLESV2 = `pkg-config --cflags --libs glesv2` WAYLAND_WEBOS_CLIENT = `pkg-config --cflags --libs wayland-webos-client` $(TARGET) : $(OBJECT) $(CC) -o $(TARGET) wayland_egl.o $(EGL) $(WAYLAND_EGL) $(GLESV2) $(WAYLAND_WEBOS_CLIENT) wayland_egl.o : wayland_egl.c $(CC) -c -o wayland_egl.o wayland_egl.c clean: rm $(OBJECT) $(TARGET) ``` Put this "Makefile" to your source directory, then just type the "make" command on your shell (of course after source environment-setup-cortexa7t2hf-neon-vfpv4-webos-linux-gnueabi) then you can get the 'wayland\_egl' as belows ``` shko@shko-H97-Gaming-3:~/work/wayland_egl_simple_ose/src$ make i586-webos-linux-gcc -m32 -march=i586 -Werror=return-type --sysroot=/home/shko/ndk_ose_qemu/sysroots/i586-webos-linux -c -o wayland_egl.o wayland_egl.c i586-webos-linux-gcc -m32 -march=i586 -Werror=return-type --sysroot=/home/shko/ndk_ose_qemu/sysroots/i586-webos-linux -o wayland_egl wayland_egl.o `pkg-config --cflags --libs egl` `pkg-config --cflags --libs wayland-egl` `pkg-config --cflags --libs glesv2` `pkg-config --cflags --libs wayland-webos-client` shko@shko-H97-Gaming-3:~/work/wayland_egl_simple_ose/src$ ls Makefile wayland_egl wayland_egl.c wayland_egl.o ``` please put 'wayland\_egl' to your emulator and run on the shell. You can see the yellow screen on your emulator if it works fine Then we can guess there is a problem during cmake procedure.