Compilation issues on Centos9

[pronebird]

Hi,

Just stumbled upon a mysterious error today when linking the static lib into rust project on Centos9, a lot of errors like this:

/usr/bin/ld: [REDACTED]/third-party/lib/libhev-task-system.a(hev-memory-allocator-slice.o): relocation R_X86_64_32 against `.text' can not be used when making a PIE object; recompile with -fPIE

/usr/bin/ld: [REDACTED]/third-party/lib/libhev-task-system.a(hev-task-aide.o): relocation R_X86_64_32 against `.bss' can not be used when making a PIE object; recompile with -fPIE

Naive approach of simply passing the flag doesn't help either:

diff --git a/Makefile b/Makefile
index d6d87cb..9e1e852 100644
--- a/Makefile
+++ b/Makefile
@@ -35,6 +35,8 @@ THIRDPARTS=$(THIRDPARTDIR)/yaml \
                   $(THIRDPARTDIR)/lwip \
                   $(THIRDPARTDIR)/hev-task-system

+$(STATIC_TARGET) : CCFLAGS+=-fPIC
+
 $(SHARED_TARGET) : CCFLAGS+=-fPIC
 $(SHARED_TARGET) : LDFLAGS+=-shared -pthread

The thing is that the static lib builds fine, but then Rust fails to link the compiled static libraries. Do you happen to know what could be the problem?

[pronebird]

Wanted to share that it seems that adding -fPIC for static target in all makefiles works great, see gist:

https://gist.github.com/pronebird/1b66745ac00773e88b16508522ff8d81

If it makes sense, can we please patch all of the makefiles? It would be difficult to do as a part of single PR as there are submodules across the board.

Its however unusual that the project builds just fine on Ubuntu and Debian but not on Centos.

[heiher]

There is a rust binding for this project: https://github.com/heiher/tun2socks

[pronebird]

I know, but they don't compile on macOS as a dependency to my project.

[heiher]

I know, but they don't compile on macOS as a dependency to my project.

Why link directly to hev-socks5-tunnel instead of tun2socks on macOS?

[heiher]

I think you can append -fPIC to CFLAGS:

make CFLAGS=-fPIC

[pronebird]

Why link directly to hev-socks5-tunnel instead of tun2socks on macOS?

Back then, tun2socks 1.0.2 didn't compile on Mac, so I pulled the C library directly. Then I started working on adding the possibility to start the tunnel using string config instead of file and the project just kept being linked directly ever since.

Today I pulled tun2socks 1.0.4 that you had released yesterday and it seems to compile just fine across the board. So I am switching over to rust crate. Thanks.