Hi there,
a user has troubles configuring a (autoconfiscated) library we have written. He is on a (fully up-to-date and not hacked in any way) Cygwin system and uses a configure script generated by Autoconf 2.59. Below is, I believe, the relevant section of config.log. To summarize:
1) tests are made for signal.h usability and presence: these are both successful; 2) immediately after, a test for sys/time.h presence failes because "g++: conftest.cc: No such file or directory". This is strange, because conftest.cc should have been created by the configure script. 3) The test for sys/time.h usability succeeds! 4) Both tests for sys/resource.h presence and usability fail for the same reason: "g++: conftest.cc: No such file or directory".
configure:29564: checking signal.h usability configure:29576: g++ -c -g -O2 conftest.cc >&5 configure:29582: $? = 0 configure:29586: test -z || test ! -s conftest.err configure:29589: $? = 0 configure:29592: test -s conftest.o configure:29595: $? = 0 configure:29605: result: yes configure:29609: checking signal.h presence configure:29619: g++ -E conftest.cc configure:29625: $? = 0 configure:29645: result: yes configure:29680: checking for signal.h configure:29687: result: yes configure:29564: checking sys/time.h usability configure:29576: g++ -c -g -O2 conftest.cc >&5 configure:29582: $? = 0 configure:29586: test -z || test ! -s conftest.err configure:29589: $? = 0 configure:29592: test -s conftest.o configure:29595: $? = 0 configure:29605: result: yes configure:29609: checking sys/time.h presence configure:29619: g++ -E conftest.cc g++: conftest.cc: No such file or directory g++: no input files configure:29625: $? = 1 configure: failed program was: configure:29645: result: no configure:29651: WARNING: sys/time.h: accepted by the compiler, rejected by the preprocessor! configure:29653: WARNING: sys/time.h: proceeding with the compiler's result configure:29680: checking for sys/time.h configure:29687: result: yes configure:29564: checking sys/resource.h usability configure:29576: g++ -c -g -O2 conftest.cc >&5 g++: conftest.cc: No such file or directory g++: no input files configure:29582: $? = 1 configure: failed program was: configure:29605: result: no configure:29609: checking sys/resource.h presence configure:29619: g++ -E conftest.cc g++: conftest.cc: No such file or directory g++: no input files configure:29625: $? = 1 configure: failed program was: configure:29645: result: no configure:29680: checking for sys/resource.h configure:29687: result: no configure:29555: checking for sys/time.h configure:29560: result: yes configure:29555: checking for sys/types.h configure:29560: result: yes configure:29555: checking for unistd.h configure:29560: result: yes
I have googled for around one hour and I have seen that many people had this problem in the past (just replace "conftest.cc" with "conftest.c" in the search), but noone seems to have found the cause. Not having access to the user's machine I don't know how to proceed, since I cannot reproduce the problem on my machines. A careful inspection of the entire config.log output did not reveal anything to me. Any idea what may be wrong? All the best,
Roberto