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Previously one who wanted to use only suffix from %_lib macro (without
'lib' prefix) had to either strip it with shell or try to guess it
from %_lib macro.
New macros allow to simplify library suffix logics in spec files:
* %_libsuff is always defined (to %nil on targets where %_lib = lib);
* %_is_libsuff is defined only on those targets where suffix
is not empty (it is useful for %{?...} expressions).
nproc(1) based approach has two advantages over /proc/stat based
calculations. Firstly, nproc(1) uses sched_getaffinity(2) and therefore
is not affected by /proc availability. Secondly, nproc(1) outputs
the number of processors actually available which may be less than
the number of online processors.
nproc(1) was introduced in coreutils-8.1.
glibc-2.26~154 changed behaviour of "getconf _NPROCESSORS_ONLN":
it now returns 2 instead of 1 when /proc is not mounted.
Change %_smp_mflags to use %__nprocs that is set to 1 when /proc
is not available.
gcc -frecord-gcc-switches adds .GCC.command.line section to each
generated ELF file. These sections have the same type (PROGBITS) and
flags (MERGE, STRINGS) as .comment sections. Like .comment sections,
.GCC.command.line sections are moved to .debug files by debugedit.
New implementation allows to invoke %make_build with a variable
assignments, e.g. LD_LIBRARY_PATH=.libs %make_build check.
A side effect of old %make_build was initialization of NPROCS
environment variable. New %make_build no longer initializes NPROCS,
but, according to specfile scan made by Igor Vlasenko, packages
in Sisyphus do not rely on NPROCS being initialized by %make_build.
Add a brp interface for checking contents of files in buildroot.
The initial revision of brp-check_contents scripts checks
for suspicious path names like /var/lib/run, complementing
the change introduced in sisyphus_check-0.8.43-alt1.
Some of %optflags options, -m* in particular, have to be passed to
assembler so that the output it produces would be consistent with the
output made by compilers.
The first two macros provide general mechanism for find-requires
and find-provides filtering. Any valid command or shell syntax can
be used - the command will be executed using "eval" within find-*
script. The implementation in %___build_pre is not particular
beautiful (as it uses here-docs), but there seems to be no easy
way to quote for eval yet.
The second two commands are built on top of the first: they use
sed as a filtering tool. The implementation is compatible with Fedora:
http://fedoraproject.org/wiki/Packaging:AutoProvidesAndRequiresFiltering
This introduces new macro %_configure_platform which will normally
expand to %_target_platform. However, for noarch packages, a special
version called %_configure_platform_noarch will be used, which will use
%_host_cpu instead of mock "noarch" cpu. Suggested by Dmitry V. Levin.
This fixes %configure failures like
checking build system type... Invalid configuration `noarch-alt-linux': machine `noarch-alt' not recognized
I enable ccache in my ~/.zshrc:
export GCC_USE_CCACHE=1
export CCACHE_DIR=$TMPDIR/.ccache
export CC=gcc CXX=g++
Now, under default rpm settings, ccache IS used with rpm, but the cache
directory is changed to ~/.ccache (since CCACHE_DIR is unset).
$ du -hs $TMPDIR/.ccache ~/.ccache
13M /tmp/.private/at/.ccache
39M /home/at/.ccache
$
These macros were added long ago. Now we use hasher for final builds.
It's okay to use default ccache settings for local builds.
With libtool >=1.9b, the libtool script will complain if it was built
from mismatched ltmain.sh and libtool m4 macro versions.
To avoid libtool version mismatch disaster, %configure itself
no longer calls libtoolize. Note that autoreconf, unlike %configure,
runs libtoolize in proper order.
