Package: src:kfreebsd-9 Version: 9.0-10 Severity: wishlist Tags: patch User: debian-...@lists.debian.org Usertags: kfreebsd X-Debbugs-Cc: pkg-llvm-t...@lists.alioth.debian.org
Hi, For future reference, attached is a patch that allows kfreebsd-9 (9.0) to build with clang-3.2. This might be useful as we currently have to use gcc-4.6, that may not be available for long post-wheezy, and gcc-4.7 reportedly produced non-working kernel images. I don't even know yet if the kernel image produced by clang-3.2 works, but upstream are using clang as their default compiler now. This patch addresses two build issues: > ../../../amd64/acpica/acpi_wakecode.S:55:2: error: unexpected directive > .code16 clang's built-in assembler does not support that feature yet, but we can work around it with "-no-integrated-as" in CFLAGS (Clang-specific option, not portable). > clang -D__va_list=__builtin_va_list -isystem /usr/include/bsd > -DLIBBSD_OVERLAY -lbsd -I. -I/home/steven/clang/kfreebsd-9-9.0/config > -std=gnu99 -o config config.o main.o lang.o mkmakefile.o mkheaders.o > mkoptions.o kernconf.o -ll -lsbuf > main.o: In function `kernconfdump': > main.c:(.text+0x95d): undefined reference to `___isoc99_sscanf' This is very odd. It didn't occur during the clang.debian.net test build done on linux-amd64, so it may really be a kfreebsd headers bug. It should be __isoc99_sscanf (two underscores only), but the extra underscore is being prepended from the setting of __USER_LABEL_PREFIX__ (not sure where that is set...). Adding "-D__USER_LABEL_PREFIX__= " to CFLAGS works around that issue. Regards, -- Steven Chamberlain ste...@pyro.eu.org
Index: debian/control.in =================================================================== --- debian/control.in (revision 4393) +++ debian/control.in (working copy) @@ -7,7 +7,7 @@ Vcs-Svn: svn://svn.debian.org/glibc-bsd/trunk/kfreebsd-@major@/ Build-Depends: debhelper (>= 5.0.0), bzip2, sharutils, flex-old | flex, freebsd-buildutils (>= 9), - gcc-@gcc_version@, libdb-dev, + clang-@clang_version@, libdb-dev, libbsd-dev (>= 0.3.0), pkg-config, libsbuf-dev, libsbuf-dev (>= 8.2-2) | kfreebsd-kernel-headers (<< 0.56), freebsd-buildutils (>= 8.2-4) [any-mipsel], Index: debian/rules =================================================================== --- debian/rules (revision 4393) +++ debian/rules (working copy) @@ -22,7 +22,7 @@ configfile := DEBCUSTOM abiname := 2 ld_target := $(shell ld --help | sed -ne "s/[^ :]*: supported targets: \([^ ]*\) .*/\1/p") -gcc_version := 4.6 +clang_version := 3.2 ifeq ($(cpu), mipsel) kfreebsd_cpu := mips @@ -43,7 +43,7 @@ FLAVOR_DIR := flavor-$(version)-$(abiname) ORIG_DIR := kfreebsd-$(major)-$(tar_version) ORIG_TAR := kfreebsd-$(major)_$(tar_version).orig.tar.gz -MAKE := make MACHINE_ARCH=$(kfreebsd_cpu) CC=gcc-$(gcc_version) WERROR= +MAKE := make MACHINE_ARCH=$(kfreebsd_cpu) CC=clang-$(clang_version) WERROR= PATH := $(CURDIR)/config:/usr/lib/freebsd:$(PATH) # Disable install of *.ko.symbols files (their presence would trigger an @@ -72,7 +72,7 @@ fi ; \ echo ; \ done - sed -e "s/@major@/$(major)/g" -e "s/@version@/$(version)/g" -e "s/@abiname@/$(abiname)/g" -e "s/@flavor@/$$flavor/g" -e "s/@gcc_version@/$(gcc_version)/g" \ + sed -e "s/@major@/$(major)/g" -e "s/@version@/$(version)/g" -e "s/@abiname@/$(abiname)/g" -e "s/@flavor@/$$flavor/g" -e "s/@clang_version@/$(clang_version)/g" \ $(CURDIR)/debian/control.in > $(CURDIR)/debian/control echo >> $(CURDIR)/debian/control for arch in `ls $(CURDIR)/debian/arch/` ; do \ @@ -149,7 +147,7 @@ config-stamp: src rm -rf config cp -af src/usr.sbin/config config - CFLAGS="-D__va_list=__builtin_va_list $(shell pkg-config --cflags libbsd-overlay) -lbsd" $(MAKE) -C config + CFLAGS="-D__va_list=__builtin_va_list $(shell pkg-config --cflags libbsd-overlay) -lbsd -no-integrated-as -D__USER_LABEL_PREFIX__= " $(MAKE) -C config touch $@ build-arch: $(foreach flavor,$(flavours),build-flavor-$(flavor)-stamp)
