configure.ac adds by optimization and debug flags by default. This is
not always intended so conifgure option is added.
Support for using this option in specfile is added too.
Also fix GDB_CFLAGS typo. GDB_FLAGS (without C)
is the correct name of variable to print in the summary.
Signed-off-by: Jan Friesse <jfriesse@redhat.com>
from AC_PREPROC_IFELSE which is strongly discouraged.
Our detection system was very weak and recent versions of clang did
show that PREPROC_IFELFE (cpp) would enable warning options that
the compiler does not support (clang).
Use a full compilation test to detect what works and what doesn't.
Based on knet patch 88491f27375a9e8aceb946853a1abf4d23ebb8f3.
Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Fabio M. Di Nitto <fdinitto@redhat.com>
Attempt to solve problem with git archive generated tarballs
(used for example by github when release is downloaded) which are no
longer git tree and (in contrast to officially released tarballs) also
doesn't contain .tarball-version file so git-version-gen script simply
cannot obtain valid version info.
Solution is based on using gitattributes which is instructs git to
replace string in the .gitarchivever file by known ref names.
git-version-gen is enhanced to support this file and tries to parse
any string which looks like "tag: v[0-9]+.[0-9]+.[0-9]". If such string
is found it's used as a version. This file is used as a last attempt and
other methods (.tarball-version, git abbrev) have precedence.
Based on idea stated by Jan Pokorný <jpokorny@redhat.com>.
Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>
