Iphone – compile error for iphone simulator

I'm trying to compile some code for the iphone simulator but am getting this error:

    /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 -O3 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk -Os  -O3 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk -Os -x objective-c -I../../include  -c version.c      
    In file included from /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/Security.framework/Headers/Security.h:29,
                     from /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSURLCredential.h:14,
                     from /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:80,
                     from version.c:11:
    /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/Security.framework/Headers/SecKey.h:166: error: expected declaration specifiers or ‘...’ before ‘SecPadding’
    /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/Security.framework/Headers/SecKey.h:196: error: expected declaration specifiers or ‘...’ before ‘SecPadding’
    /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/Security.framework/Headers/SecKey.h:228: error: expected declaration specifiers or ‘...’ before ‘SecPadding’
    /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/Security.framework/Headers/SecKey.h:257: error: expected declaration specifiers or ‘...’ before ‘SecPadding’
    make: *** [version.o] Error 1

However, if I compile for the actual iphone, it works fine:

    /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 -O3 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk  -arch armv6  -Os  -O3 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk  -arch armv6  -Os -x objective-c -I../../include  -c version.c      

This problem happens with a file as simple as just including Foundation.h with no other code:

#import <Foundation/Foundation.h>

Any ideas on what this is about? The strange this is that I would expect this to fail for both iphone and the simulator.

EDIT: fyi, I'm not using XCode. This is a large, multi-platform project using Makefiles. The commands you see above were emitted from the Makefile.