webrtc mips build: why rtc_executable build generate ELF 32-bit LSB share object instead of ELF 32-bit LSB executable

Question

I tried to cross compile webrtc for mipsel:

1)gn gen out/mips --args=target_os=”linux” target_cpu=”mipesel”

2)ninja -C out/mips Build succeeded, and I wan to run some example demo codes such as example/peerconnection/server, the artifact was generated as peerconnection_server under out/mips. When I ran

3)file peerconnection_server

it shows out/mips/peerconnection_server: ELF 32-bit LSB shared object, MIPS, MIPS32 rel2 version 1 (SYSV), dynamically linked, interpreter /lib/ld.so.1, for GNU/Linux 3.2.0, not stripped

My question is: How can I config the gn build system, so the generated peerconnection_server type is ELF 32-bit LSB executable instead of ELF 32-bit LSB shared object above?

Note: I also tried the arm build, the type is ELF 32-bit LSB executable indeed.