0. 安裝一些必備文件
brew install libelf gnu-sed binutils(解決readelf)
將sed、find、readlink、xargs、readelf分別鏈接到g開頭的同名文件
1. 下載源碼
repo init -u https://github.com/OP-TEE/manifest.git -m default.xml -b master
repo sync
2. 修改toolchains
gcc-linaro-arm-linux-gnueabihf-2014.05_mac.pkg會將toolchain安裝到
/usr/local/linaro/arm-linux-gnueabihf
因此，需要：
sudo ln -s /usr/local/linaro/arm-linux-gnueabihf ~/works/optee/toolchains/aarch32
3. 修改build/toolchain.mk
ROOT ?= ${HOME}/works/optee
4. 解決一系列錯誤
4.1 'elf.h' 等一系列文件找不到
參照http://stackoverflow.com/questions/10018764/building-linux-kernel-on-mac-os-x
First you'll need the following files to cross-compile a kernel on an OS X box (copy them from your known-working Linux VM to your local /usr/include):
/usr/include/elf.h
/usr/include/features.h
/usr/include/stdc-predef.h
/usr/include/bits/*.h
/usr/include/gnu/*.h
/usr/include/byteswap.h
/usr/include/error.h
Next you'll need malloc.h to be in the expected location for a Linux system, so do:
sudo ln -s /usr/include/malloc/malloc.h /usr/include/malloc.h
4.2
/usr/include/i386/_types.h:46:20: error: typedef redefinition with different types ('long long' vs 'long')
typedef long long __int64_t;
^
/usr/include/bits/types.h:43:25: note: previous definition is here
typedef signed long int __int64_t;
解決：
sudo rm /usr/include/bits/types.h
sudo ln -s /usr/include/i386/_types.h /usr/include/bits/types.h
4.3
Undefined symbols for architecture x86_64:
"_error", referenced from:
_main in vdsomunge-a7211f.o
"_error_message_count", referenced from:
_cleanup in vdsomunge-a7211f.o
ld: symbol(s) not found for architecture x86_64
參照：https://www.assembla.com/spaces/phylogenetic-likelihood-library/messages/2592013
… had to "remove that #include <error.h> and also remove the error (...) call in …
… quick look on google suggests that this is what people do on MacOSX for error.h …
我的處理，將原來從ubuntu拷貝過來的error.h中的內容修改：
#define error(__status, __errnum, __format, ...)
// __attribute__ ((__format__ (__printf__, 3, 4)));
#define error_at_line(__status, __errnum, __fname, \
__lineno, __format, ...)
// __attribute__ ((__format__ (__printf__, 5, 6)));
/* If NULL, error will flush stdout, then print on stderr the program
name, a colon and a space. Otherwise, error will call this
function without parameters instead. */
#define error_print_progname
/* This variable is incremented each time `error' is called. */
int error_message_count = 0;
/* Sometimes we want to have at most one error per line. This
variable controls whether this mode is selected or not. */
int error_one_per_line = 0;
4.4 解決 MAP_ANON 錯誤
util/oslib-posix.c:132:22: error: use of undeclared identifier 'MAP_ANON'
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
^
/Users/manfeel/works/optee/qemu/include/qemu-common.h:61:23: note: expanded from macro 'MAP_ANONYMOUS'
#define MAP_ANONYMOUS MAP_ANON
實際上MAP_ANON是定義在/usr/include/sys/mman.h中的
#define MAP_ANON 0x1000 /* allocated from memory, swap space */
不知爲何出錯！
只好修改qemu-common.h中爲：
#define MAP_ANONYMOUS 0x1000
4.5 util/qemu-openpty.c:39:11: fatal error: 'pty.h' file not found
# include <pty.h>
這個問題由如下包含關係導致：
CC util/qemu-openpty.o
In file included from util/qemu-openpty.c:36:
In file included from /Users/manfeel/works/optee/qemu/include/qemu-common.h:120:
In file included from /Users/manfeel/works/optee/qemu/include/qemu/bswap.h:17:
In file included from /usr/include/byteswap.h:21:
/usr/include/features.h:388:10: fatal error: 'gnu/stubs.h' file not found
#include <gnu/stubs.h>
因爲gnu目錄是從linux拷貝，可能和mac系統衝突了
看來4.4的問題也應該和此有關。
原來問題在configure中(生成config-host.mak)，如果存在/usr/include/features.h
則會在config-host.mak中添加 CONFIG_BYTESWAP_H=y
實際上，OSX（DARWIN）是不需要這個配置的。
找到3513行，修改爲：
# Search for bswap_32 function
byteswap_h=no
# add by Manfeel for DARWIN
if test "$darwin" != "yes"; then
cat > $TMPC << EOF
#include <byteswap.h>
int main(void) { return bswap_32(0); }
EOF
if compile_prog "" "" ; then
byteswap_h=yes
fi
fi
5. 最後，進入build目錄
make all
你就可以在mac下愉快的和optee玩耍了，最後還有一個關於gnome-terminal的小問題，留給聰明的讀者朋友去解決吧。
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