Re: (ITS#8056) [PATCH] libdb version is not detected correctly when using gcc5

jsynacek@redhat.com wrote:

Full_Name: Jan Synacek Version: 2.4.40 OS: GNU/Linux URL: https://jsynacek.fedorapeople.org/openldap/jsynacek-20150211-fix-libdb-detec... Submission from: (NULL) (94.112.188.81)

The old cpp version generated: __db_version 5

Configure then correctly picked up the version, since it greps for "__db_version".

The new output: __db_version 5

Grepping no longer works and configure fails.

Running cpp with -P (inhibit linemarkers generation) fixes this when using gcc 5. Behavior with older versions of gcc is not changed.

Your patch is simple enough but frankly this sounds like a bug in gcc 5's cpp. It shouldn't be inserting gratuitous whitespace in the middle of lines, or inserting line breaks arbitrarily.