Bug 12572 – pragma(lib, "curl") and -Lcurl broken

Currently it appears to be impossible to link against libcurl (at least on Ubuntu 13.10 x64) without manually invoking the linker. When adding pragma(lib, "curl") to a program, or by adding -Lcurl to dmd or rdmd's command-line parameter, the program will still fail to link (the linker complains about not being able to find symbols exported by libcurl). Running dmd with -v reveals that it invokes the linker as follows: gcc test.o -o test -m64 -L/etc/../lib -Xlinker --export-dynamic -lcurl -l:libphobos2.a -lpthread -lm -lrt Moving the "-lcurl" parameter to the end, as follows, resolves the linker problems: gcc test.o -o test -m64 -L/etc/../lib -Xlinker --export-dynamic -l:libphobos2.a -lpthread -lm -lrt -lcurl I'm marking this issue as critical since it makes std.net.curl incompatible with rdmd, and it forces users to switch to a different method of building their programs should they decide to use std.net.curl at some point in development.

Yes, this is a huge pain. libcurl is pretty common for D scripts, and not being able to use rdmd for these scripts stinks.

I'd probably call this a duplicate of https://issues.dlang.org/show_bug.cgi?id=7044 but I'll let you decide.

It works fine for me on Slackware. I think this is an Ubuntu bug: https://bugs.launchpad.net/ubuntu/+source/curl/+bug/1001576 I think they are recommending getting the proper compile flags with: curl-config --cc --cflags and curl-config --libs

(In reply to AndyC from comment #3) > It works fine for me on Slackware. > > I think this is an Ubuntu bug: I think it's just that Slackware doesn't use --as-needed. > https://bugs.launchpad.net/ubuntu/+source/curl/+bug/1001576 > > I think they are recommending getting the proper compile flags with: > > curl-config --cc --cflags > and > curl-config --libs This might fix curl, but doesn't fix the general case - especially when linking D libraries with C libraries with e.g. dub.

> https://bugs.launchpad.net/ubuntu/+source/curl/+bug/1001576 Thanks, this pointed me in the right direction, and I figured out the following system-wide workaround: # echo 'gcc -Wl,--no-as-needed $*' > /usr/local/bin/gcc-dmd # chmod 755 /usr/local/bin/gcc-dmd # echo 'CC=/usr/local/bin/gcc-dmd' >> /etc/dmd.conf

*** This issue has been marked as a duplicate of issue 7044 ***