On 2011-03-29 23:20, m...@freebsd.org wrote:
So here's what I'm pondering. When I build a library, like e.g. libc, where do the include files get pulled from? They can't (shouldn't) be the ones in /usr/include, but I don't see a -nostdinc like for the kernel. There are -I directives in the Makefile for -I${.CURDIR}/include -I${.CURDIR}/../../include, etc., but that won't remove /usr/include from the search path.
During the bootstrap stage, a copy of gcc (or clang) is built, that has all default search paths for headers, libraries, etc, set relative to ${WORLDTMP}, usually /usr/obj/usr/src/tmp. E.g: $ /usr/obj/usr/src/tmp/usr/bin/gcc -v -E -x c /dev/null -o /dev/null Using built-in specs. Target: amd64-undermydesk-freebsd Configured with: FreeBSD/amd64 system compiler Thread model: posix gcc version 4.2.1 20070719 [FreeBSD] /usr/obj/usr/src/tmp/usr/libexec/cc1 -E -quiet -v -D_LONGLONG /dev/null -o /dev/null #include "..." search starts here: #include <...> search starts here: /usr/obj/usr/src/tmp/usr/include/gcc/4.2 /usr/obj/usr/src/tmp/usr/include End of search list. and: $ /usr/obj/usr/src/tmp/usr/bin/gcc -print-search-dirs install: /usr/obj/usr/src/tmp/usr/libexec/ programs: =/usr/obj/usr/src/tmp/usr/bin/:/usr/obj/usr/src/tmp/usr/bin/:/usr/obj/usr/src/tmp/usr/libexec/:/usr/obj/usr/src/tmp/usr/libexec/:/usr/obj/usr/src/tmp/usr/libexec/ libraries: =/usr/obj/usr/src/tmp/usr/lib/:/usr/obj/usr/src/tmp/usr/lib/ This is a rather nasty hack, though. If we can make it work, we should probably try using --sysroot instead, or alternatively, -nostdinc and adding include dirs by hand. The same for executable and library search paths, although I am not sure if there is a way to completely reset those with the current options. _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"