Henrik Bach
2004-Sep-19 20:07 UTC
[LLVMdev] Need for HAVE_MALLOC_H and a rewrite of../Config/alloca.hto handle this define
>From: "Henrik Bach" <henrik_bach_llvm at hotmail.com> >Date: Sun, 19 Sep 2004 02:26:51 +0200 > >Hi > >On win32 the alloca function is prototyped in <malloc.h>. > >The configure script checks the precence of this header file: >----------------------- >... >checking malloc.h usability... yes >checking malloc.h presence... yes >checking for malloc.h... yes >... >----------------------- > >Later in the configure script, it checks: >----------------------- >... >checking for working alloca.h... no >checking for alloca... yes >... >----------------------- > >It also checks for presence of stdlib: >----------------------- >... >checking for stdlib.h... yes >... >----------------------- > >This gives us these defines in llvm/Config/config.h: >----------------------- >#define HAVE_ALLOCA 1 >#define HAVE_STDLIB_H 1 >----------------------- > >On the mingw platform it results in that we get this error when compiling: >----------------------- >C:/MinGW/msys/local/src/llvm/lib/Support/FileUtilities.cpp: In function >`bool > llvm::CheckMagic(const std::string&, const std::string&)': >C:/MinGW/msys/local/src/llvm/lib/Support/FileUtilities.cpp:33: error: >`alloca' > undeclared (first use this function) >----------------------- > >I don't know whether on certain unix systems that the alloc function is >prototyped in stdlib.h. But, when HAVE_STDLIB_H is set on mingw systems we >get above error rather than this: >----------------------- >The function alloca() is required but not found! >----------------------- > >This leaves us, that we need a test in the configure script that gives us a >define like: >HAVE_MALLOC_H and to rewrite llvm/Config/alloca.h to handle this define >appropriately.Sorry, HAVE_MALLOC_H *is* a valid define in llvm/Config/config.h. This leaves, that llvm/Config/alloca.h has to be fixed accordingly. I'll try to come up with a patch. Henrik _________________________________________________________________ Find det, du s�ger p� MSN S�g http://search.msn.dk
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