FreeBSD src
8dcbd43161
make.conf(5), while allowing the build32 stage on 64-bit architectures to still override them, so that stage can successfully build 32-bit compatibility libraries. Explanation: 1) The build32 stage sets environment variables CC, CXX, AS and LD for its sub-make, to add 32-bit specific flags (-m32 and such). 2) The sub-make reads sys.mk, encounters CC?= and CXX?= assignments, so does not alter them. 3) After some other stuff, sys.mk reads /etc/make.conf. When you have "CC=xxx" and "CXX=yyy" statements in there, they will *override* the build32-supplied CC/CXX values, nullifying the 32-bit specific flags. 4) Thus all objects get built as 64-bit anyway, and since LD is usually not set in make.conf, it still has the 32-bit flags! 5) Now, whenever something is linked, you will get a "ld: Relocatable linking with relocations from format elf64-x86-64-freebsd (foo.o) to format elf32-i386-freebsd (bar.o) is not supported" error. Fix this by adding "-ECC -ECXX -EAS -ELD" to the build32 sub-make invocation, which forces those environment variables to always override any assignment in makefiles. Thus making it possible to simply set: CC=my-cc CXX=my-c++ in your make.conf, or specify a path, even: CC=/usr/local/bin/other-cc CXX=/usr/local/bin/other-c++ Note this was never a problem on i386, since it has no build32 stage. Silence from: current@ MFC after: 1 week |
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bin | ||
cddl | ||
contrib | ||
crypto | ||
etc | ||
games | ||
gnu | ||
include | ||
kerberos5 | ||
lib | ||
libexec | ||
release | ||
rescue | ||
sbin | ||
secure | ||
share | ||
sys | ||
tools | ||
usr.bin | ||
usr.sbin | ||
COPYRIGHT | ||
LOCKS | ||
MAINTAINERS | ||
Makefile | ||
Makefile.inc1 | ||
Makefile.mips | ||
ObsoleteFiles.inc | ||
README | ||
UPDATING |
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree, the most commonly used one being ``world'', which rebuilds and installs everything in the FreeBSD system from the source tree except the kernel, the kernel-modules and the contents of /etc. The ``world'' target should only be used in cases where the source tree has not changed from the currently running version. See: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The ``buildkernel'' and ``installkernel'' targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html And in the config(8) man page. Note: If you want to build and install the kernel with the ``buildkernel'' and ``installkernel'' targets, you might need to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/<arch>/conf sub-directory (assuming that you've installed the kernel sources), the file named GENERIC being the one used to build your initial installation kernel. The file NOTES contains entries and documentation for all possible devices, not just those commonly used. It is the successor of the ancient LINT file, but in contrast to LINT, it is not buildable as a kernel but a pure reference and documentation file. Source Roadmap: --------------- bin System/user commands. cddl Various commands and libraries under the Common Development and Distribution License. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. games Amusements. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. rescue Build system for statically linked /rescue utilities. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html