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possible libtool bug blocking builds of Cygwin setup.exe


I am having trouble building Cygwin setup.exe (regular 32bit on
32bit). I am finding that the build is hanging at the linking stage of

make[2]: Entering directory `/cygdrive/c/Users/shaddy/cygwin-home/workarea/cygwin-setup-build/libgetopt++'

Building with options I have deduced give me some debug:

$ make AM_DEFAULT_VERBOSITY=1 am__v_lt_1=--debug 2>&1 | tee -a build.log

I find (with confirmation from pstree), the build is hung in libtool:

make[2]: Entering directory `/cygdrive/c/Users/shaddy/cygwin-home/workarea/cygwin-setup-build/libgetopt++' /bin/sh ./libtool --debug --tag=CXX --mode=link g++ -Wall -Werror -Wno-uninitialized -g -O2 -version-info 1:1:0 -o -rpath /cygdrive/c/Users/shaddy/cygwin-home/workarea/cygwin-setup-build/inst/lib src/GetOption.lo src/Option.lo src/BoolOption.lo src/OptionSet.lo src/StringArrayOption.lo src/StringOption.lo
libtool: enabling shell trace mode
+ func_convert_core_msys_to_w32 .libs/
+ set -x
++ /usr/bin/sed -e 's/[ ]*$//' -e 's|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g'

The code that it is stuck on is:

  func_convert_core_msys_to_w32_result=`( cmd //c echo "$1" ) 2>/dev/null |
    $SED -e 's/[ ]*$//' -e "$lt_sed_naive_backslashify"`

And I found the double-slash on the cmd to be problematic. If I
manually edit it out, the build continues (but only to a real build
failure, which I'll leave out for the moment).

I've attached the cygcheck.out from that build host, a Windows 8
computer. However, I also encountered exactly the same problem on a
Windows 7 computer.

Have I stumbled on a real problem?


Attachment: cygcheck.out
Description: Text document

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