On Fri, May 27, 2016 at 10:05:03AM +0200, Jakub Wilk wrote:
> * Andreas Tille <andr...@an3as.eu>, 2016-05-27, 09:27:
> >>/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/Scrt1.o: In
> >>function `_start':
> >>(.text+0x20): undefined reference to `main'
> >>collect2: error: ld returned 1 exit status
>
> The command line that causes this is:
>
> gcc -shared -g -O2 -fstack-protector-strong -Wformat -Werror=format-security
> -Wdate-time -D_FORTIFY_SOURCE=2 -DUSE_NON_CONST
> -I/build/staden-2.0.0+b10/./tk_utils -I/build/staden-2.0.0+b10/./Misc
> -I/build/staden-2.0.0+b10/./tk_utils -I/usr/include
> -I"/usr/include/tcl8.6/tk-private/generic"
> -I"/usr/include/tcl8.6/tk-private/unix"
> -I"/usr/include/tcl8.6/tk-private/generic/ttk"
> -I"/usr/include/tcl8.6/tcl-private/generic"
> -I"/usr/include/tcl8.6/tcl-private/unix"
> -I/build/staden-2.0.0+b10/./seq_utils -I/build/staden-2.0.0+b10
> -DSVN_VERSION="" -fPIC -g -O2 -fstack-protector-strong -Wformat
> -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -DUSE_NON_CONST
> -I/build/staden-2.0.0+b10/./tk_utils -I/build/staden-2.0.0+b10/./Misc
> -I/build/staden-2.0.0+b10/./tk_utils -I/usr/include
> -I"/usr/include/tcl8.6/tk-private/generic"
> -I"/usr/include/tcl8.6/tk-private/unix"
> -I"/usr/include/tcl8.6/tk-private/generic/ttk"
> -I"/usr/include/tcl8.6/tcl-private/generic"
> -I"/usr/include/tcl8.6/tcl-private/unix"
> -I/build/staden-2.0.0+b10/./seq_utils -I/build/staden-2.0.0+b10
> -DSVN_VERSION="" -fPIC -L/build/staden-2.0.0+b10/lib -Wl,-z,relro
> -Wl,--export-dynamic -Wl,-rpath,/usr/lib/staden -o
> /build/staden-2.0.0+b10/lib/libtk_utils.so cli_arg.o tclXkeylist.o
> tclXutil.o tcl_utils.o tcl_debug.o misc.o init.o text_output.o tkRaster.o
> tkRasterBuiltIn.o sheet.o tkSheet.o tkSheet_common.o trace_print.o
> postscript.o split.o tkTrace.o tkTraceComp.o tkTraceIO.o tkTraceDisp.o
> capture.o canvas_box.o ruler_tick.o restriction_enzyme_map.o element_canvas.o
> container.o container_ruler.o tcl_io_lib.o -L/usr/lib/x86_64-linux-gnu
> -lstaden-read -fPIE -pie -Wl,-z,relro -Wl,-z,now -lm -lpthread -lcurl -lz
> -L/usr/lib/x86_64-linux-gnu -ltk8.6 -L/usr/lib/x86_64-linux-gnu -ltcl8.6
> -lX11 -lXss -lXext -lXft -lfontconfig -lfreetype -lfontconfig -lpthread -ldl
> -lz -lpthread -lieee -lm -lmisc -lpng -lz
>
> This is trying to build a shared library with -pie, which is not going to
> fly. -pie (and -fPIE) is only for executables.
>
> Now, I don't see any mention of pie in debian/rules, or in the old build
> log, so I guess this flag must have come from a (broken) library.
Most probably this is due to libstaden-read-dev where I added
export DEB_BUILD_MAINT_OPTIONS = hardening=+all
I'll revert this change and see what might happen ...
Thanks for the pointer
Andreas.
--
http://fam-tille.de
