diff options
Diffstat (limited to 'doc/README.clang')
| -rw-r--r-- | doc/README.clang | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/doc/README.clang b/doc/README.clang index fe36909..7ce5ae4 100644 --- a/doc/README.clang +++ b/doc/README.clang @@ -1,4 +1,4 @@ -The biggest problem when trying to compile U-boot with clang is that +The biggest problem when trying to compile U-Boot with clang is that almost all archs rely on storing gd in a global register and clang user manual states: "clang does not support global register variables; this is unlikely to be implemented soon because it requires additional LLVM @@ -17,9 +17,9 @@ will also fail to compile, but there is in no strict reason to do so in the ARM world, since crt0.S takes care of this. These assignments can be avoided by changing the init calls but this is not in mainline yet. -NOTE: without the -mllvm -arm-use-movt=0 flags u-boot will compile +NOTE: without the -mllvm -arm-use-movt=0 flags U-Boot will compile fine, but llvm might hardcode addresses in movw / movt pairs, which -cannot be relocated and u-boot will fail at runtime. +cannot be relocated and U-Boot will fail at runtime. Debian (based) -------------- @@ -45,7 +45,7 @@ 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 -Given that u-boot will default to gcc, above commands can be +Given that U-Boot will default to gcc, above commands can be simplified with a simple wrapper script, listed below. /usr/local/bin/arm-gnueabi-freebsd-gcc |