Date: Tue, 28 Jan 2014 01:52:46 +0000 From: Chris Anderson <cjanderson@...dex.com> To: musl@...ts.openwall.com Subject: Statically linking musl with lto optimizations Hi I just wanted to know if anyone has tried this and if so with what success? I have tried adding the -flto and -fuse-linker-plugin to my CFLAGS but when I go and link against the static lib/libc.a archive I get a lot of unresolved symbols. I fixed this by changing the makefile thus: 38 AR = $(CROSS_COMPILE)gcc-ar 39 RANLIB = $(CROSS_COMPILE)gcc-ranlib which is described in this thread http://permalink.gmane.org/gmane.comp.gcc.patches/221033 This meant that the archive was being created correctly. The problem that I now have is that if I use If I use ./bin/musl-gcc -flto=5 -fuse-linker-plugin -o test test.c I get a whole lot of unresolved symbols being spewed out by the linker. If I try and link using gcc without gcc libs and but without the musl spec file, ie gcc -flto=5 -fuse-linker-plugin -static -nostdlib all is good apart from an undefined reference to __dynlink. If I add a dummy __dynlink then the whole program links of course it wont execute because the .bss and other segments are not configured. What is the correct way to do this? Cheers Chris
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