On 2012-04-08 10:45, "Timo Westkämper" <timo.westkam...@gmail.com>" wrote:
I am still testing which setup gives me reliable shared D libraries which can be used from C.Here is my latest test: * test.d: import std.stdio; extern (C) { void hiD() { writeln("hi from D lib"); } } * main.c #include <stdio.h> #include <dlfcn.h> #include <stdlib.h> void main() { void (*hiD)(void); void* handle = dlopen("./libtest.so", RTLD_LAZY); if (handle == NULL) { printf("%s\n", dlerror()); exit(1); } hiD = dlsym(handle, "hiD"); if (hiD != NULL) { hiD(); } else { printf("hiD is null\n"); } dlclose(handle); } * Makefile #!/bin/bash test: #gdc-4.6 -g -c test.d -fPIC -o test.o #gdc-4.6 -shared -o libtest.so -fPIC test.o -lc -nostartfiles dmd -g -c test.d -fPIC ld -shared -o libtest.so test.o -lrt -lphobos2 -lpthread gcc -g main.c -ldl -lpthread ./a.out clean: rm -rf *.so *.o *.out With this setup I get ./libtest.so: undefined symbol: _deh_beg With a fake main method added I get make: *** [test] Segmentation fault This is what I get from gdb Program received signal SIGSEGV, Segmentation fault. 0xb7fd1ed3 in std.stdio.__T7writelnTAyaZ.writeln() (_param_0=...) at /usr/include/d/dmd/phobos/std/stdio.d:1550 1550 enforce(fprintf(.stdout.p.handle, "%.*s\n", Event with the following startup hooks extern(C) { void gc_init(); void gc_term(); void _init() { gc_init(); } void _fini() { gc_term(); } } I get the same error. I am using dmd 2.058 on Ubuntu 11.10 (32 bit) With gdc I get different errors, but it seems even more difficult to get it working. Does anyone know what is missing to get proper shared library support working on Linux?
This is what I can think of for now: * Proper initialization of TLS data * Setting up exception handling tables * Setting up module info -- /Jacob Carlborg
