[yocto] cmake / <string> no such file or directory ??!

[Guy Morand]

Hello Yocto developpers!

I'm facing a weird problem that seems very strange. I can cross-compile 
a project based on cmake with the generated Yocto SDK.

However, after adding a recipe, the compilation fails:
/mnt/ssd/yocto-build-script/build/tmp/work/cortexa7t2hf-neon-poky-linux-gnueabi/communication-library/git-AUTOINC+f5cd493ce5-r0/recipe-sysroot-native/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-g++ 
-Dcommunication_interface_EXPORTS 
-I/mnt/ssd/yocto-build-script/build/tmp/work/cortexa7t2hf-neon-poky-linux-gnueabi/communication-library/git-AUTOINC+f5cd493ce5-r0/git/library 
-Wall -Wextra -Werror -fPIC   -std=gnu++11 -MD -MT 
CMakeFiles/communication-interface.dir/communication_interface.cpp.o -MF 
CMakeFiles/communication-interface.dir/communication_interface.cpp.o.d 
-o CMakeFiles/communication-interface.dir/communication_interface.cpp.o 
-c 
/mnt/ssd/yocto-build-script/build/tmp/work/cortexa7t2hf-neon-poky-linux-gnueabi/communication-library/git-AUTOINC+f5cd493ce5-r0/git/communication_interface.cpp
| In file included from 
/mnt/ssd/yocto-build-script/build/tmp/work/cortexa7t2hf-neon-poky-linux-gnueabi/communication-library/git-AUTOINC+f5cd493ce5-r0/git/communication_interface.cpp:1:
| 
/mnt/ssd/yocto-build-script/build/tmp/work/cortexa7t2hf-neon-poky-linux-gnueabi/communication-library/git-AUTOINC+f5cd493ce5-r0/git/library/communication_interface.h:4:10: 
fatal error: string: No such file or directory
|  #include <string>
|           ^~~~~~~~
| compilation terminated.

I also tried to change the cmake generator to unix makefile (who knows ...):
OECMAKE_GENERATOR = "Unix Makefiles"

But I have the same issue. I am working on the thud branch. Anyone had 
the same problem? What am I doing wrong?

Best regards,

Guy Morand