On Tue, Sep 29, 2015 at 1:42 AM, Douglas Katzman <do...@google.com> wrote:
> I have two questions: >> 1. How can I tell clang that these two files are under directory >> /opt/extra ? I don't mind write a simple patch to clang, of course, >> simpler solutions like build time options or command line options are >> much better. >> 2. Since crtbegin.o/crtend.o are part of a compiler, why don't clang >> provide one itself ? Google results showed that these two files seem >> to be quite simple, are there any patent/copyright issues related ? >> > > 1. Trying adding "-B/opt/extra" into your clang invocation. > Haven't tried this solution, I'll try it tonight. I figured out one myself: add -DGCC_INSTALL_PREFIX=/opt/extra to cmake will fix this problem. I'm not sure whether it's a hack or standard. > 2. The crt begin/end files are considered part of the standard library, > not the compiler. > I don't think so, if it's part of the standard, why every GCC installation has a copy of crtbegin/crtend ? I also tried musl libc (www.musl-libc.org) it installs files like crt1.o, crti.o, crtn.o but *not* crtbegin.o/crtend.o
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