I built a "i686-w64-mingw32" cross-compiler (gcc 4.7.3, binutils 2.23.2) on Ubuntu 13.04 (64bit) for target-host Windows (32bit) and compiled a bunch of static libraries with it (cairo, pango, pixbuf etc.). For every static library I used "-O2 -flto" as CFLAGS and LDFLAGS. I put all the objects files of these static libraries into one big static library and compiled a little program with it in CodeBlocks 12.11 using the same cross compiler. It compiled fine without errors. If I apply the "-flto" flag in CodeBlocks, the first 5 weird errors showed up, like: cairo-surface.o (symbol from plugin):(.text+0x0): multiple definition of `cairo_surface_flush' cairo-surface.o (symbol from plugin):(.text+0x0): first defined here It's saying "cairo_surface_flush" is redefined within the same object file, does this make any sense? Anyways, I used the work-around-option "-Wl,-allow-multiple-definition" and the errors went away. But one error is still left: "lto1: internal compiler error: resolution sub id 0 not in object file" I have no clue what's wrong here, but I guess it got something to do with the compiler. I also tried the same with a gcc cross compiler version 4.8.2 (build all libraries again) but I'm still getting the same error, just a bit more output: lto1: internal compiler error: resolution sub id 0 not in object file 0x4e91f3 lto_resolution_read ../../../src/gcc/gcc/lto/lto.c:2228 0x4e91f3 lto_file_read ../../../src/gcc/gcc/lto/lto.c:2385 0x4e91f3 read_cgraph_and_symbols ../../../src/gcc/gcc/lto/lto.c:2964 0x4e91f3 lto_main() ../../../src/gcc/gcc/lto/lto.c:3375 You can see the function which is throwing the error in this file (line 1069): https://chromium.googlesource.com/chromiumos/third_party/gcc/+/5cfcf8452e8f755d2b2899d96f93afdb4672de16/gcc/gcc-4.6.0/gcc/lto/lto.c What can I do to solve this? Maybe some flag? Or should I file a bug report? -- View this message in context: http://gcc.1065356.n5.nabble.com/Weird-LTO-internal-cross-compiler-error-gcc-4-7-3-and-4-8-2-tp977677.html Sent from the gcc - Help mailing list archive at Nabble.com.
