compiling gcc/unwind* with IMA fails to produce correct assembly with trunk: /there/src/buildroot.git.pentium4/i686_build/staging/usr/bin/i686-linux-uclibc-gcc -Os -pipe -fno-builtin -O2 -Os -pipe -fno-builtin -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../.././gcc -I/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc -I/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/. -I/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc -I/there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../include -DHAVE_CC_TLS -DUSE_TLS -o libgcc_eh_onestep.o -MT libgcc_eh_onestep.o -MD -MP -MF libgcc_eh_onestep.dep -fexceptions /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/emutls.c /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/gthr-gnat.c /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-c.c /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde-glibc.c /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2.c /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-sjlj.c -fvisibility=hidden -DHIDE_EXPORTS -c -combine In file included from /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde-glibc.c:62: /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c: In function ‘fde_unencoded_compare’: /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:326: warning: dereferencing type-punned pointer will break strict-aliasing rules /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:327: warning: dereferencing type-punned pointer will break strict-aliasing rules /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c: In function ‘add_fdes’: /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:682: warning: dereferencing type-punned pointer will break strict-aliasing rules /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c: In function ‘linear_search_fdes’: /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:800: warning: dereferencing type-punned pointer will break strict-aliasing rules /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c: In function ‘binary_search_unencoded_fdes’: /there/src/buildroot.git.pentium4/i686_toolchain/gcc-4.4.0/libgcc/../gcc/unwind-dw2-fde.c:848: warning: dereferencing type-punned pointer will break strict-aliasing rules {standard input}: Assembler messages: {standard input}:4640: Error: symbol `read_encoded_value' is already defined make[3]: *** [libgcc_eh_onestep.o] Error 1
Created attachment 16856 [details] unreduced file1
Created attachment 16857 [details] unreduced file2
Created attachment 16858 [details] unreduced file3
Created attachment 16859 [details] output of unreduced input /there/src/buildroot.git.pentium4/i686_build/staging/usr/bin/i686-linux-uclibc-gcc -Os emutls.i unwind-c.i unwind-dw2.i -S -o libgcc_eh-unreduced.S -combine
Created attachment 16860 [details] reduced file1
Created attachment 16861 [details] reduced file3
Created attachment 16862 [details] reduced file3
Created attachment 16863 [details] output of reduced input /there/src/buildroot.git.pentium4/i686_build/staging/usr/bin/i686-linux-uclibc-gcc -Os emutls.0.i unwind-c.0.i unwind-dw2.0.i -c -o libgcc_eh.o -combine -w /tmp/ccBHYNVJ.s: Assembler messages: /tmp/ccBHYNVJ.s:29: Error: symbol `read_encoded_value' is already defined
This will most likely be closed as won't fix. -combine is really not supported and should be removed.
*** This bug has been marked as a duplicate of 35034 ***