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| author | Tom Rini <trini@konsulko.com> | 2016-03-16 19:55:55 -0400 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-04-01 17:17:39 -0400 |
| commit | b745e82837e7c285fefdecfd580a343ecbd3baff (patch) | |
| tree | d73d1618bf9d7e3c552fe8cb64715608e41ef80a /doc | |
| parent | 40345e9ea74b0caef06f205364bb2cf93528cc40 (diff) | |
| download | u-boot-b745e82837e7c285fefdecfd580a343ecbd3baff.zip u-boot-b745e82837e7c285fefdecfd580a343ecbd3baff.tar.gz u-boot-b745e82837e7c285fefdecfd580a343ecbd3baff.tar.bz2 | |
arm: clang: Update support slightly
- Move most of the flags required into LLVM_RELFLAGS to test at build
time instead of requiring them to be passed in.
- Update doc/README.clang to reflect this
- Switch to rpi_2 as the example as it's closer to working out of the
box than rpi is.
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.clang | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/doc/README.clang b/doc/README.clang index d41f85b..e0491b2 100644 --- a/doc/README.clang +++ b/doc/README.clang @@ -26,10 +26,10 @@ Debian (based) Binary packages can be installed as usual, e.g.: sudo apt-get install clang -To compile U-Boot with clang on linux without IAS use e.g.: -export TRIPLET=arm-linux-gnueabi && export CROSS_COMPILE="$TRIPLET-" -make HOSTCC=clang CC="clang -target $TRIPLET -mllvm -arm-use-movt=0 -no-integrated-as" rpi_defconfig -make HOSTCC=clang CC="clang -target $TRIPLET -mllvm -arm-use-movt=0 -no-integrated-as" all V=1 -j8 +Note that we still use binutils for some tools so we must continue to set +CROSS_COMPILE. To compile U-Boot with clang on linux without IAS use e.g.: +make HOSTCC=clang rpi_2_defconfig +make HOSTCC=clang CROSS_COMPILE=arm-linux-gnueabi- CC=clang -j8 It can also be used to compile sandbox: make HOSTCC=clang sandbox_defconfig @@ -46,8 +46,8 @@ ln -s /usr/local/bin/arm-gnueabi-freebsd-as /usr/bin/arm-freebsd-eabi-as # The following commands compile U-Boot using the clang xdev toolchain. # NOTE: CROSS_COMPILE and target differ on purpose! export CROSS_COMPILE=arm-gnueabi-freebsd- -gmake CC="clang -target arm-freebsd-eabi --sysroot /usr/arm-freebsd -no-integrated-as -mllvm -arm-use-movt=0" rpi_defconfig -gmake CC="clang -target arm-freebsd-eabi --sysroot /usr/arm-freebsd -no-integrated-as -mllvm -arm-use-movt=0" -j8 +gmake rpi_2_defconfig +gmake CC="clang -target arm-freebsd-eabi --sysroot /usr/arm-freebsd" -j8 Given that U-Boot will default to gcc, above commands can be simplified with a simple wrapper script, listed below. @@ -56,5 +56,4 @@ simplified with a simple wrapper script, listed below. --- #!/bin/sh -exec clang -target arm-freebsd-eabi --sysroot /usr/arm-freebsd -no-integrated-as -mllvm -arm-use-movt=0 "$@" - +exec clang -target arm-freebsd-eabi --sysroot /usr/arm-freebsd "$@" |