I am trying to cross compile the icu library for the iPhone. I downloaded a configure script wrapper from http://sites.google.com/site/michaelsafyan/coding/articles/iphone When I execute it, I get the following error message:
checking wchar.h usability... no
checking wchar.h presence... yes
configure: WARNING: wchar.h: present but cannot be compiled
configure: WARNING: wchar.h: check for missing prerequisite headers?
configure: WARNING: wchar.h: see the Autoconf documentation
configure: WARNING: wchar.h: section "Present But Cannot Be Compiled"
configure: WARNING: wchar.h: proceeding with the preprocessor's result
configure: WARNING: wchar.h: in the future, the compiler will take precedence
checking for wchar.h... yes
checking for library containing wcscpy... none required
checking size of wchar_t... 0
configure: error: There is wchar.h but the size of wchar_t is 0
Does anyone have a clue how I can fix this?
Thanks in advance
I made a very dirty hack to solve the problem: I just removed this check in the configure script. Then, icu compiled. Hope now, that it also works correctly...
in the platform.h you must define the size of wchar_t to the size of the actual platform. If you dont do this it does not work.
define U_SIZEOF_WCHAR_T 4 // macosx
Manfred
来源：https://stackoverflow.com/questions/2395569/problem-with-cross-compiling-icu