On 5/05/11 6:06 PM, Ronald Oussoren wrote:
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
Aha, the problem is because "./usr/local" in the SDK **does not**
symlink to the system "/usr/local". Instead "./usr/local/lib" is
symlinked to "/usr/local/lib, and there is no corresponding symlink to
"/usr/local/include".
Dave
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