When using the later versions of clang-3.1-r4, boot0 will fail to compile. # emerge -p sys-devel/clang sys-devel/llvm [ebuild R ] sys-devel/llvm-3.1-r2 [ebuild R ] sys-devel/clang-3.1-r5 ===> i386 (all) ===> i386/mbr (all) Warning: Object directory not changed from original /var/tmp/portage/sys-freebsd/boot0-9.0/work/sys/boot/i386/mbr as --defsym FLAGS=0x80 --32 -o mbr.o mbr.s clang -O2 -pipe -fno-strict-aliasing -ffreestanding -mpreferred-stack-boundary=2 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -msoft-float -m32 -march=i386 -std=gnu99 -Qunused-arguments -e start -Ttext 0x600 -Wl,-N,-S,--oformat,binary -nostdlib -m elf_i386_fbsd -o mbr mbr.o /usr/bin/x86_64-gentoo-freebsd9.0-ld: cannot find 0x600: No such file or directory clang: error: linker command failed with exit code 1 (use -v to see invocation) *** Error code 1 1 error *** Error code 2 1 error *** Error code 2 1 error # emerge -p sys-devel/clang sys-devel/llvm [ebuild R ] sys-devel/llvm-3.1-r2 [ebuild R ] sys-devel/clang-3.1-r2 ===> i386/boot2 (all) Warning: Object directory not changed from original /var/tmp/portage/sys-freebsd/boot0-9.0/work/sys/boot/i386/boot2 dd if=/dev/zero of=boot2.ldr bs=512 count=1 ln -sf /var/tmp/portage/sys-freebsd/boot0-9.0/work/sys/boot/i386/boot2/../../../i386/include machine clang -Os -fno-guess-branch-probability -fno-unit-at-a-time -mrtd -mregparm=3 -DUSE_XREAD -DUFS1_AND_UFS2 -DFLAGS=0x80 -DSIOPRT=0x3f8 -DSIOFMT=0x3 -DSIOSPD=9600 -I/var/tmp/portage/sys-freebsd/boot0-9.0/work/sys/boot/i386/boot2/../../common -I/var/tmp/portage/sys-freebsd/boot0-9.0/work/sys/boot/i386/boot2/../btx/lib -I. -Wall -Waggregate-return -Wbad-function-cast -Wcast-align -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wshadow -Wstrict-prototypes -Wwrite-strings -Winline --param max-inline-insns-single=100 -mllvm -stack-alignment=8 -mllvm -inline-threshold=3 -mllvm -enable-load-pre=false -no-integrated-as -ffreestanding -mpreferred-stack-boundary=2 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -msoft-float -m32 -march=i386 -std=gnu99 -m32 -c boot1.S clang -Os -fno-guess-branch-probability -fno-unit-at-a-time -mrtd -mregparm=3 -DUSE_XREAD -DUFS1_AND_UFS2 -DFLAGS=0x80 -DSIOPRT=0x3f8 -DSIOFMT=0x3 -DSIOSPD=9600 -I/var/tmp/portage/sys-freebsd/boot0-9.0/work/sys/boot/i386/boot2/../../common -I/var/tmp/portage/sys-freebsd/boot0-9.0/work/sys/boot/i386/boot2/../btx/lib -I. -Wall -Waggregate-return -Wbad-function-cast -Wcast-align -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wshadow -Wstrict-prototypes -Wwrite-strings -Winline --param max-inline-insns-single=100 -mllvm -stack-alignment=8 -mllvm -inline-threshold=3 -mllvm -enable-load-pre=false -ffreestanding -mpreferred-stack-boundary=2 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -msoft-float -m32 -march=i386 -std=gnu99 -m32 -c sio.S clang: warning: the clang compiler does not support '-fno-unit-at-a-time' clang: warning: argument unused during compilation: '-fno-guess-branch-probability' clang: warning: argument unused during compilation: '--param max-inline-insns-single=100' clang: warning: argument unused during compilation: '-mpreferred-stack-boundary=2' clang: warning: the clang compiler does not support '-fno-unit-at-a-time' clang: warning: argument unused during compilation: '-fno-guess-branch-probability' clang: warning: argument unused during compilation: '--param max-inline-insns-single=100' clang: warning: argument unused during compilation: '-mpreferred-stack-boundary=2' 1+0 records in 1+0 records out 512 bytes transferred in 0.000046 secs (11126858 bytes/sec) clang (LLVM option parsing): Unknown command line argument '-stack-alignment=8'. Try: 'clang (LLVM option parsing) -help' clang (LLVM option parsing): Did you mean '-ssc-dce-limit=8'? clang (LLVM option parsing): Unknown command line argument '-stack-alignment=8'. Try: 'clang (LLVM option parsing) -help' clang (LLVM option parsing): Did you mean '-ssc-dce-limit=8'?
boot2 is known issue.
Created attachment 330528 [details, diff] successfully compiled, patch for clang-3.1-r5.ebuild Compiled successfully by reverting to gentoo-runtime-gcc-detection.patch from gentoo-runtime-gcc-detection-v3.patch. new -v3 patch may have a problem on FreeBSD...
Attention point is the argument to the linker. -L/usr/lib32 -L is set in the case of clang-3.1-gentoo-runtime-gcc-detection-v3.patch. Other hand, -L/usr/lib32 -L/usr/lib/gcc/x86_64-gentoo-freebsd9.0/4.6.3 is set in the case of clang-3.1-gentoo-runtime-gcc-detection.patch. # emerge -pv clang These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild R ] sys-devel/clang-3.2 USE="static-analyzer -debug -multitarget -python {-test}" PYTHON_TARGETS="python2_7 (-pypy1_9) (-pypy2_0) (-python2_6)" 0 kB clang-3.2, applied clang-3.1-gentoo-runtime-gcc-detection-v3.patch ) FYI, http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sys-devel/clang/files/clang-3.1-gentoo-runtime-gcc-detection-v3.patch?revision=1.1 # cd /var/tmp/portage/sys-freebsd/boot0-9.9999/work/sys/boot/i386/mbr # CC=clang make Warning: Object directory not changed from original /var/tmp/portage/sys-freebsd/boot0-9.9999/work/sys/boot/i386/mbr as --defsym FLAGS=0x80 --32 -o mbr.o mbr.s clang -O2 -pipe -march=i386 -ffreestanding -mpreferred-stack-boundary=2 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -msoft-float -m32 -std=gnu99 -Qunused-arguments -e start -Ttext 0x600 -Wl,-N,-S,--oformat,binary -nostdlib -o mbr mbr.o /usr/bin/x86_64-gentoo-freebsd9.0-ld: cannot find 0x600: No such file or directory clang: error: linker command failed with exit code 1 (use -v to see invocation) *** [mbr] Error code 1 Stop in /var/tmp/portage/sys-freebsd/boot0-9.9999/work/sys/boot/i386/mbr. # clang -O2 -pipe -march=i386 -ffreestanding -mpreferred-stack-boundary=2 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -msoft-float -m32 -std=gnu99 -Qunused-arguments -e start -Ttext 0x600 -Wl,-N,-S,--oformat,binary -nostdlib -v -o mbr mbr.o clang version 3.2 (tags/RELEASE_32/final) Target: i386-gentoo-freebsd9.0 Thread model: posix "/usr/bin/x86_64-gentoo-freebsd9.0-ld" --eh-frame-hdr -dynamic-linker /libexec/ld-elf.so.1 --hash-style=both --enable-new-dtags -m elf_i386_fbsd -o mbr -L/usr/lib32 -L -Ttext 0x600 -e start -N -S --oformat binary mbr.o /usr/bin/x86_64-gentoo-freebsd9.0-ld: cannot find 0x600: No such file or directory clang: error: linker command failed with exit code 1 (use -v to see invocation) clang-3.2, applied clang-3.1-gentoo-runtime-gcc-detection.patch ) FYI, http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sys-devel/clang/files/clang-3.1-gentoo-runtime-gcc-detection.patch?revision=1.1 # cd /var/tmp/portage/sys-freebsd/boot0-9.9999/work/sys/boot/i386/mbr # CC=clang make Warning: Object directory not changed from original /var/tmp/portage/sys-freebsd/boot0-9.9999/work/sys/boot/i386/mbr as --defsym FLAGS=0x80 --32 -o mbr.o mbr.s clang -O2 -pipe -march=i386 -ffreestanding -mpreferred-stack-boundary=2 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -msoft-float -m32 -std=gnu99 -Qunused-arguments -e start -Ttext 0x600 -Wl,-N,-S,--oformat,binary -nostdlib -o mbr mbr.o # clang -O2 -pipe -march=i386 -ffreestanding -mpreferred-stack-boundary=2 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -msoft-float -m32 -std=gnu99 -Qunused-arguments -e start -Ttext 0x600 -Wl,-N,-S,--oformat,binary -nostdlib -v -o mbr mbr.o clang version 3.2 (tags/RELEASE_32/final) Target: i386-gentoo-freebsd9.0 Thread model: posix "/usr/bin/x86_64-gentoo-freebsd9.0-ld" --eh-frame-hdr -dynamic-linker /libexec/ld-elf.so.1 --hash-style=both --enable-new-dtags -m elf_i386_fbsd -o mbr -L/usr/lib32 -L/usr/lib/gcc/x86_64-gentoo-freebsd9.0/4.6.3 -Ttext 0x600 -e start -N -S --oformat binary mbr.o
I was confirmed to be buildable using clang-3.3.
