Hi,
I have been trying to get libclang.so working on Solaris, but I can’t seem to get anything out of it.
Simply running “cmake …” worked, it successfully picked up GCC and was able to build parts of llvm/clang. Unfortunately it died on running llvm-tblgen.
A bit of scrambling and poking showed that if I specify LLVM_TARGETS_TO_BUILD=AArch64 running “gmake libclang” successfully ends producing “clang” and “libclang.so” (note: I do not intend to produce binaries with clang, all I want is libclang.so for its awesome C++ parsing/traversing facilities).
Unfortunately neither of them works when I try to actually use them. Both show the same symptoms of dying with SIGBUS.
The most debugging I could get was either by injecting print statements or trying to use dbx (gdb simply dies when I try to run anything on it). More annoyingly dbx is able to show function names only with optimized code (which I find odd, but when I tried using version built with -O0 -g options I didn’t even get function names on stacktrace, not to mention file+line).
Now, my tracking lead me to places with awful code like this:
Stmt **getStmts() { return reinterpret_cast<Stmt **> (this + 1); }
Apparently that is standard “solution” in clang sources, yet it seems to be one of the reasons that clang/libclang.so crashes.
There are other places where “this” has requirement to be aligned only to 4 bytes and data after has alignment of 8. Which not surprisingly causes SIGBUS issue.
I tried using -mfaster-structs which causes GCC to align all structures to at least 8 bytes, but that breaks ELF* classes and AlignOf template.
I tried searching on google, this mailing list and official website, but I can’t find any information on how to build llvm/clang on Solaris so that it will work.
Has anyone succeeded in getting libclang.so working on Solaris?
Are there some instructions on how to build it on Solaris?