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The latest versions of Darwin on the Aarch64 platform mandate PIE executables. On x86_64 it remains optional, but produces tool warnings after Darwin20, so we default to PIE executables there too. All (non-PowerPC) 64b Darwin platforms mandate PIC code and therefore force host_shared on (we issue a diagnostic if the user tries to configure them non-shared). However, this also means we cannot test the host_shared setting independently of the host_pie setting so that the logic for setting PICFLAG must be amended for Darwin. For Darwin versions required to have PIE executables, in the event that the user tries to configure these as --disable-host-pie, we issue a warning and override the setting. These versions must also switch host_pie on even if it is not given in the configure line. To cater for this we pass the current value of host_pie, as determined by top-level configure, to the GCC configure. Signed-off-by: Iain Sandoe <iain@sandoe.co.uk> * Makefile.def: Pass the enable-host-pie value to GCC configure. * configure.ac: Adjust the logic for shared and PIE host flags to ensure that PIE is passed for hosts that require it.
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.