Let's say I have
theCFile.h declaring theCProcedure,
theCFile.c++ containing theCProcedure
and theCocoaFile.m calling theCProcedure.
All files are in the same project; when building everything seems
ok; I set "#include "theCFile.h"" in theCocoaFile.m; the target of
theCFile.c++ is the target application...
I shouldn't be surprised if it couldn't link with some libraries
called from theCFile.c++, but linking with theCFile.o?
You need to tell the compiler to generate theCProcedure with C linkage
rather than C++ so its name doesn't get mangled to include type
information.
In theCFile.h:
#ifdef __cplusplus
extern "C" {
#endif
float theProcedure(int foo); // or whatever its prototype is
#ifdef __cplusplus
}
#endif
This ensures that, even when included from a source file being
compiled as C++, theProcedure will be generated with or called via an
unmangled name.
-- Chris
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