On 3 May, 2011, at 20:28, Irmen de Jong wrote:
>
>
>> I haven't looked into the problem you have with automaticly picking up
>> dependencies
>> in /usr/local, AFAIK that should just work the same as without -isysroot.
>
> charon:~ irmen$ cat /usr/local/include/irmen.h
> #define FOO 1
>
> charon:~ irmen$ cat test.c
> #include <irmen.h>
> int main(void)
> {
> return 0;
> }
>
> charon:~ irmen$ gcc test.c
> charon:~ irmen$
> charon:~ irmen$ gcc -isysroot /Developer/SDKs/MacOSX10.4u.sdk test.c
> test.c:1:19: error: irmen.h: No such file or directory
>
>
> According to what gcc prints when compiling with -v, the -isysroot replaces
> /usr/local/include include-path (and some others). So it's expected that it
> now fails to
> compile, right? I can get it to compile again when I explicitly add
> /usr/local/include
> to the include path once more:
>
> $ MACOSX_DEPLOYMENT_TARGET=10.4 gcc -I/usr/local/include -isysroot
> /Developer/SDKs/MacOSX10.4u.sdk test.c
>
> I guess the situation is the same with libs living in /usr/local/lib.
>
> I'm not entirely sure though if the above is what you were talking about
> Ronald?-isysroot /FOO adds "/FOO" to the front of items on the default search path for the compiler, that is instead of looking in "/usr/include" the compiler will look in "/FOO/usr/include". For you example this means that the compiler will look in /Developer/SDKs/MacOSX10.4u.sdk/usr/local/include for "irmen.h". That should work because "/usr/local" in the SDK is a symlink to the actual system-wide "/usr/local" directory: $ ls -l /Developer/SDKs/MacOSX10.4u.sdk/usr/local total 8 lrwxr-xr-x 1 root wheel 14 Mar 24 09:10 lib -> /usr/local/lib This is on a 10.6 system with Xcode 3, but I'm pretty sure that the compiler worked the same in earlier releases. Have you changed files in the SDK? BTW. The reason "-I/usr/local/include" fixes your prolbem is that the location is then added as a user-supplied item on the search path and those aren't resolved relative to the SDK root. Ronald
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