Build with LTO

LTO has been explicitely disabled because of build issue with the
optimization. It seems however that these issues are fixed now and
Fedora guidelines ask to use default build options unless absolutely
necessary. Reenable LTO.

Also clean the specfile a little: no need for all these commented out
lines related to git sources.

Resolves: RHEL-46715
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>

libtracefs.spec

@@ -1,27 +1,10 @@
-# git tag
-#%%global commit 4f24f98960c223e56329519bb90a90f0b2ad813f
-#%%global commitdate 20201120
-#%%global shortcommit %%(c=%%{commit}; echo ${c:0:7})
-
-# LTO causes linking issues randomly like
-# lto1: internal compiler error: resolution sub id 0x7136344381f3059f not in object file
-# So disabling LTO at this moment.
-
-%global _lto_cflags %nil
-
 Name: libtracefs
 Version: 1.8.0
-Release: 3%{?dist}
+Release: 4%{?dist}
 License: LGPL-2.1-or-later AND GPL-2.0-or-later AND GPL-2.0-only
 Summary: Library for access kernel tracefs
 
 URL: https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/
-# If upstream does not provide tarballs, to generate:
-# git clone git://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git
-# cd libtracefs
-# git archive --prefix=libtracefs-%%{version}/ -o libtracefs-%%{version}.tar.gz %%{git_commit}
-#Source0: libtracefs-%%{version}.tar.gz
-#Source0: https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/snapshot/libtracefs-%%{commit}.tar.gz
 Source0: https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/snapshot/libtracefs-%{version}.tar.gz
 BuildRequires:  gcc
 BuildRequires:  make
@@ -63,6 +46,9 @@ rm -rf %{buildroot}/%{_libdir}/libtracefs.a
 %{_libdir}/%{name}.so
 
 %changelog
+* Tue Jul 09 2024 Jerome Marchand <jmarchan@redhat.com> - 1.8.0-4
+- Build with LTO (RHEL-46715)
+
 * Mon Jun 24 2024 Troy Dawson <tdawson@redhat.com> - 1.8.0-3
 - Bump release for June 2024 mass rebuild