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With current binutils and both gcc 2.95.3 and GCC 3.2 CVS on i686-linux-gnu I now get: checking for DWARF2 unwind info support... (cached) no The test program from configure: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ static char __EH_FRAME_BEGIN__[]; _start () { #ifdef CHECK__register_frame __register_frame (__EH_FRAME_BEGIN__); __deregister_frame (__EH_FRAME_BEGIN__); #endif #ifdef CHECK__register_frame_info __register_frame_info (__EH_FRAME_BEGIN__); __deregister_frame_info (__EH_FRAME_BEGIN__); #endif } int __eh_pc; __throw () {} /* FIXME: this is fragile. */ malloc () {} strcmp () {} strlen () {} memcpy () {} memset () {} free () {} abort () {} __bzero () {} ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ gives with gcc 2.95.3: gromit:~/tmp:[1]$ gcc -O2 -DCHECK__register_frame_info -nostdlib -nostartfiles -o conftest dwarf-test.c -lgcc dwarf-test.c: In function `abort': dwarf-test.c:22: warning: `noreturn' function does return /tmp/ccXEbOxh.o: In function `_start': /tmp/ccXEbOxh.o(.text+0xa): undefined reference to `__EH_FRAME_BEGIN__' /tmp/ccXEbOxh.o(.text+0x17): undefined reference to `__EH_FRAME_BEGIN__' collect2: ld returned 1 exit status gromit:~/tmp:[1]$ gcc -O2 -DCHECK__register_frame -nostdlib -nostartfiles -o conftest dwarf-test.c -lgcc dwarf-test.c: In function `abort': dwarf-test.c:22: warning: `noreturn' function does return /tmp/ccyGGtkH.o: In function `_start': /tmp/ccyGGtkH.o(.text+0xa): undefined reference to `__EH_FRAME_BEGIN__' /tmp/ccyGGtkH.o(.text+0x17): undefined reference to `__EH_FRAME_BEGIN__' collect2: ld returned 1 exit status And with gcc 3.2 CVS: gromit:~/tmp:[1]$ /opt/gcc/3.2-devel/bin/gcc -O2 -DCHECK__register_frame_info -nostdlib -nostartfiles -o conftest dwarf-test.c -lgcc dwarf-test.c: In function `abort': dwarf-test.c:22: warning: `noreturn' function does return /tmp/ccaTwPiF.o: In function `_start': /tmp/ccaTwPiF.o(.text+0x9): undefined reference to `__EH_FRAME_BEGIN__' /tmp/ccaTwPiF.o(.text+0xe): undefined reference to `__register_frame_info' /tmp/ccaTwPiF.o(.text+0x15): undefined reference to `__EH_FRAME_BEGIN__' /tmp/ccaTwPiF.o(.text+0x1a): undefined reference to `__deregister_frame_info' collect2: ld returned 1 exit status gromit:~/tmp:[1]$ /opt/gcc/3.2-devel/bin/gcc -O2 -DCHECK__register_frame -nostdlib -nostartfiles -o conftest dwarf-test.c -lgcc dwarf-test.c: In function `abort': dwarf-test.c:22: warning: `noreturn' function does return /tmp/ccWPMC6G.o: In function `_start': /tmp/ccWPMC6G.o(.text+0x9): undefined reference to `__EH_FRAME_BEGIN__' /tmp/ccWPMC6G.o(.text+0xe): undefined reference to `__register_frame' /tmp/ccWPMC6G.o(.text+0x15): undefined reference to `__EH_FRAME_BEGIN__' /tmp/ccWPMC6G.o(.text+0x1a): undefined reference to `__deregister_frame' collect2: ld returned 1 exit status Any ideas? This leads to the following bug when linking sln: /opt/gcc/3.2-devel/bin/gcc -nostdlib -nostartfiles -static -o /builds/glibc/gcc-3.2/elf/sln /builds/glibc/gcc-3.2/csu/crt1.o /builds/glibc/gcc-3.2/csu/crti.o `/opt/gcc/3.2-devel/bin/gcc --print-file-name=crtbegin.o` /builds/glibc/gcc-3.2/elf/sln.o /builds/glibc/gcc-3.2/libc.a -lgcc /builds/glibc/gcc-3.2/libc.a `/opt/gcc/3.2-devel/bin/gcc --print-file-name=crtend.o` /builds/glibc/gcc-3.2/csu/crtn.o /opt/gcc/3.2-devel/lib/gcc-lib/i686-pc-linux-gnu/3.2/crtbegin.o: In function `__do_global_dtors_aux': /opt/gcc/3.2-devel/lib/gcc-lib/i686-pc-linux-gnu/3.2/crtbegin.o(.text+0x36): undefined reference to `__deregister_frame_info_bases' /opt/gcc/3.2-devel/lib/gcc-lib/i686-pc-linux-gnu/3.2/crtbegin.o(.text+0x46): undefined reference to `__deregister_frame_info_bases' /opt/gcc/3.2-devel/lib/gcc-lib/i686-pc-linux-gnu/3.2/crtbegin.o: In function `frame_dummy': /opt/gcc/3.2-devel/lib/gcc-lib/i686-pc-linux-gnu/3.2/crtbegin.o(.text+0x62): undefined reference to `__register_frame_info_bases' /opt/gcc/3.2-devel/lib/gcc-lib/i686-pc-linux-gnu/3.2/crtbegin.o(.text+0x97): undefined reference to `__register_frame_info_bases' collect2: ld returned 1 exit status make[2]: *** [/builds/glibc/gcc-3.2/elf/sln] Error 1 Andreas -- Andreas Jaeger SuSE Labs aj@suse.de private aj@arthur.inka.de http://www.suse.de/~aj
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