-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Eric Blake on 6/6/2009 12:42 PM: > I'm not sure why it was done, but this appears to fix it. I'm in the > middle of testing a libtool bootstrap after (temporarily) removing my C++ > compiler; if everything still works, are there any objections to this patch?
Hmm - I noticed this while testing on cygwin with gcc but not g++; remember, cygwin tends to be case-insensitive (you can request case sensitivity, but not everyone does); I suspect a similar thing would happen on MacOS: checking for g++... no checking for c++... no checking for gpp... no checking for aCC... no checking for CC... CC checking whether we are using the GNU C++ compiler... no checking whether CC accepts -g... no checking dependency style of CC... gcc3 checking how to run the C++ preprocessor... /lib/cpp configure: error: in `/home/eblake/libtool': configure: error: C++ preprocessor "/lib/cpp" fails sanity check Looking at the config.log is more telling: configure:12281: checking for CC configure:12297: found /usr/bin/CC configure:12308: result: CC configure:12335: checking for C++ compiler version configure:12344: CC --version >&5 CC (GCC) 3.4.4 (cygming special, gdc 0.12, using dmd 0.125) ... configure:12359: checking whether we are using the GNU C++ compiler configure:12378: CC -c conftest.cpp >&5 CC: installation problem, cannot exec 'cc1plus': No such file or directory In my situation, CC (a C++ compiler on some platforms) is indistinguishable from cc (a C compiler) to a case-insensitive exec(), but gcc then pays attention to the case of argv[0] and tries to invoke the (uninstalled) c++ helper rather than running as a C compiler, leading to subsequent failed guesses. So the patch needs to be tweaked - when checking for a C++ compiler, we ought to test that the compiler can actually perform a C++-specific compilation, not just that --version or other trivial actions work. Any ideas for the quickest course of action here? - -- Don't work too hard, make some time for fun as well! Eric Blake [email protected] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkoquwoACgkQ84KuGfSFAYBmXwCgnvDSICqCvhGNTO1ptOHjlMWO 9L4An0wdF2YXNnEjvtjGTWi7nPWvxB3Y =a/KP -----END PGP SIGNATURE-----
