On Tue, Oct 4, 2011 at 12:13 PM, Marco Atzeri wrote: (snip) > Kare, > in addition to the TOFU advise, > > running configure of grib_api-1.9.9_libtool.tar.gz > on my XP-SP3 gave no problem. > > "Configuration completed." > > The ANSI C test is a basic one > > configure:6808: checking for ANSI C header files > configure:6828: gcc -c -g -O2 conftest.c >&5 > configure:6828: $? = 0 > configure:6901: gcc -o conftest.exe -g -O2 conftest.c >&5 > configure:6901: $? = 0 > configure:6901: ./conftest.exe > configure:6901: $? = 0 > configure:6912: result: yes > > I reproduced the hang on my Cygwin CYGWIN_NT-6.0 1.7.9(0.237/5/3) > 2011-03-29 10:10 i686 Cygwin > and gcc version 4.5.3 > > This appears to be the critical spot (line 6820-6828) > > if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | > $EGREP "memchr" >/dev/null 2>&1; then > : > else > ac_cv_header_stdc=no > fi > > It tries to run the preprocessor and pipe its output into egrep. > Unfortunately, the EGREP variable appears to be empty, so the end > result is similar to: > > gcc -E conftest.c | memchr > > Trying the above from the bash prompt (in both mintty and classic > Cygwin prompt) results in an (unkillable from Cygwin) cc1.exe which is > perpetually waiting for output: > > $ ps > PID PPID PGID WINPID TTY UID STIME COMMAND > 4484 1 4484 4752 con 539771 Oct 3 /usr/bin/XWin > 7848 1 7848 7848 ? 539771 14:03:11 /usr/bin/mintty > 6468 7848 6468 7460 1 539771 14:03:11 /usr/bin/bash > 6692 1 6692 6692 ? 539771 10:12:37 /usr/bin/mintty > 4600 6692 4600 7156 3 539771 10:12:37 /usr/bin/ssh > 6272 6468 6272 6356 1 539771 13:08:43 /usr/bin/gcc-4 > O 7492 6272 6272 6856 1 539771 13:08:43 > /usr/lib/gcc/i686-pc-cygwin/4.5.3/cc1 > 7404 6468 7404 524 1 539771 13:08:46 /usr/bin/ps > > > So, the workaround is to replace $EGREP with egrep in configure; then > configure runs successfully. > > This seems to be some peculiarity of Cygwin's current GCC 4.5.3; > neither GCC 3.4.4 in Cygwin 1.7 nor GCC 4.3.4 in Cygwin 1.7 nor GCC > 4.3.2 in Cygwin 1.5 exhibit this hang. > > Csaba
Csaba & Marco. Marco: Your try on the XP-SP3 gave no problem. My try on Win 7 Pro hangs, but as Csaba points out: This seems to be some peculiarity of Cygwin's current GCC 4.5.3 Csaba: Replacing $EGREP with egrep in configure did make the difference! Thanx to both of you for excellent help. Regards, Kare -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
