Builds use a mix of styles for the hash table in the ELF header. Only
one style of table is necessary, and the GNU one is more performant
for lookups. Eliminating the SysV style hash table trims ~450kb. This
is done via setting the default linker in gcc instead of LDFLAGS as
some packages ignore LDFLAGS.
Note that if MIPS is ever added as a supported architecture, it
does not support hash-style=gnu at this time.
Signed-off-by: Ian Leonard <antonlacon@gmail.com>
Split up the LTO flags in config/optimize and assemble
full C/CXX/LDFLAGS in config/functions.
Add flags for parallel/single-threaded lto and fat/non-fat
lto object creation.
Change the default lto build flag to use non-fat lto objects.
Signed-off-by: Matthias Reichl <hias@horus.com>
Packages are only built with LTO if it's explicitly enabled via
the lto build flag or if a package enables LTO via configure / cmake
options.
Enabling LTO via configure / cmake is the preferred way as this
gives packages more fine grained control, eg enable parallel LTO
linking etc. When doing this packages should respect the
LTO_SUPPORT setting so LTO can be disabled globally.
To avoid conflicting C/CXX/LDFLAGS no FLAGS are added when the
lto build flag is not set.
Signed-off-by: Matthias Reichl <hias@horus.com>
