I ran into the following problem building the latest cygwin snapshot:
configure: loading cache .././config.cache
configure: error: `CFLAGS' has changed since the previous run:
configure: former value: -O2 -g -O2
configure: current value: -O2 -g -O2
configure: error: changes in the environment can compromise the build
configure: error: run `make distclean' and/or `rm .././config.cache' and start
over
configure: error: /bin/sh '../../../../src/newlib/libc/configure' failed for
libc
By piping the output to a file, I saw that the former value of CFLAGS is "-O2
-g -O2 " (two spaces), while the current value is "-O2 -g -O2 " (one space).
This causes the comparison in libc/configure to fail.
The way I've resolved this is to replace the following line:
if test "x$ac_old_val" != "x$ac_new_val"; then
with
if test "`echo $ac_old_val`" != "`echo $ac_new_val`"; then
wherever it appears in any "configure" script (there are 75 configure scripts
that contain this test, BTW). There may be a more elegant way around this, but
I haven't found it. Running "make distclean" or removing config.cache doesn't
resolve the problem.
-----
Ernie Coskrey SteelEye Technology, Inc. 803-461-3875
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