This will still build the compiler for the target but will not build the bootstrap cross-compiler in the cross-tools phase. Other toolchain bootstrapping, such as elftoolchan and binutils, currently still occurs. This will utilize the default CC (cc, /usr/bin/cc) as an external compiler. This is planned to be on-by-default eventually. This will utilize the __FreeBSD_cc_version compiler macro defined in the source tree and compare it to CC's version. If they match then the cross-compiler is skipped. If [X]CC is an external compiler (absolute path) or WITHOUT_CROSS_COMPILER is already set, then this logic is skipped. If the expected bootstrap compiler type no longer matches the found CC compiler type (clang vs gcc), then the logic is skipped. As an extra safety check the version number is also compared from the compiler to the tree version. Clang: The macro FREEBSD_CC_VERSION is defined in: lib/clang/include/clang/Basic/Version.inc For clang -target will be used if TARGET_ARCH != MACHINE_ARCH. This is from the current external toolchain logic. There is currently an assumption that the host compiler can build the TARGET_ARCH. This will usually be the case since we don't conditionalize target arch support in clang, but it will break when introducing new architectures. This problem is mitigated by incrementing the version when adding new architectures. GCC: The macro FBSD_CC_VER is defined in: gnu/usr.bin/cc/cc_tools/freebsd-native.h For GCC there is no simple -target support when TARGET_ARCH != MACHINE_ARCH. In this case the opportunistic skip is not done. If we add proper support for this case in external toolchain logic then it will be fine to enable. This relies on the macros being incremented whenever any change occurs to these compilers that warrant rebuilding files. It also should never repeat earlier values. Reviewed by: brooks, bapt, imp Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D6357 |
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.. | ||
bsdbox | ||
build | ||
bus_space | ||
debugscripts | ||
diag | ||
ifnet | ||
kerneldoc | ||
KSE | ||
LibraryReport | ||
regression | ||
sched | ||
test | ||
tools | ||
install.sh | ||
make_libdeps.sh | ||
README | ||
tinder.sh |
$FreeBSD$ This directory tree contains tools used for the maintenance and testing of FreeBSD. There is no toplevel Makefile structure since these tools are not meant to be built as part of the standard system, though there may be individual Makefiles in some of the subdirs. Please read the README files in the subdirs for further information.