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If I add the "-v" option to clang in ./libraries/Makefile, the resulting log shows that the library was linked twice, causing symbol duplication.> This holds on macos 10.13 with Apple toolkit 10.14 and the original llvm 7.0.0 with the given settings.

On Mon, Jan 28, 2019 at 17:11, Quanah Gibson-Mount <quanah(a)symas.com&gt; wrote: > --On Monday, January 28, 2019 3:35 PM +0000 Rupert Gallagher > <ruga(a)protonmail.com&gt; wrote: > >> As you can see, I am using the default Apple linker, and hardened >> settings for the compiler. Try using those settings yourself, and see >> what comes out. > > I tested on FreeBSD12 (since it uses clang rather than gcc) with the > following flags and the build completed w/o issue: > > CFLAGS= -g -fstack-protector-all -fno-omit-frame-pointer -fPIC -fPIE -O2 > -Wformat -Wformat-security -Werror=format-security > LDFLAGS= -Wl,-z,relro,-z,now -pie > CPPFLAGS= -D_FORTIFY_SOURCE=2 -D_FORTIFY_SOURCE=2 -D_FORTIFY_SOURCE=2