llvm dev - Jul 2004 - [LLVMdev] /usr/local/src/llvm/include/Config/alloca.h:42:17: #error "The function alloca()

Hi

As shown below, the .\configure script found a version of alloca():
---------------------
configure:20831: checking for working alloca.h
configure:20853: gcc -o conftest -g -O2   conftest.c -ldl  >&5
configure:20856: $? = 0
configure:20859: test -s conftest
configure:20862: $? = 0
configure:20873: result: yes
configure:20883: checking for alloca
configure:20925: gcc -o conftest -g -O2   conftest.c -ldl  >&5
configure:20928: $? = 0
configure:20931: test -s conftest
configure:20934: $? = 0
configure:20945: result: yes
---------------------

However, I got this error when compiling:
---------------------
In file included from FileUtilities.cpp:22:
/usr/local/src/llvm/include/Config/alloca.h:42:17: #error "The function 
alloca() is required but not found!"
---------------------

By looking in include/Config/config.h:
---------------------
/* Define to 1 if you have `alloca', as a function or macro. */
/* #undef HAVE_ALLOCA */

/* Define to 1 if you have <alloca.h> and it should be used (not on
Ultrix).
   */
/* #undef HAVE_ALLOCA_H */
---------------------
The macros are not set as expected. The alloca() function is defined in 
<alloca.h> header file.


/Henrik

_________________________________________________________________
Find det, du s�ger p� MSN S�g http://search.msn.dk

Henrik Bach wrote:
> Hi
> 
> As shown below, the .\configure script found a version of alloca():
> ---------------------
> configure:20831: checking for working alloca.h
> configure:20853: gcc -o conftest -g -O2   conftest.c -ldl  >&5
> configure:20856: $? = 0
> configure:20859: test -s conftest
> configure:20862: $? = 0
> configure:20873: result: yes
> configure:20883: checking for alloca
> configure:20925: gcc -o conftest -g -O2   conftest.c -ldl  >&5
> configure:20928: $? = 0
> configure:20931: test -s conftest
> configure:20934: $? = 0
> configure:20945: result: yes
> ---------------------
> 
> However, I got this error when compiling:
> ---------------------
> In file included from FileUtilities.cpp:22:
> /usr/local/src/llvm/include/Config/alloca.h:42:17: #error "The
function
> alloca() is required but not found!"
> ---------------------
> 
> By looking in include/Config/config.h:
> ---------------------
> /* Define to 1 if you have `alloca', as a function or macro. */
> /* #undef HAVE_ALLOCA */
> 
> /* Define to 1 if you have <alloca.h> and it should be used (not on 
> Ultrix).
>   */
> /* #undef HAVE_ALLOCA_H */
> ---------------------
> The macros are not set as expected. The alloca() function is defined in 
> <alloca.h> header file.
Are you sure that you are looking at OBJDIR/include/Config/config.h and 
not SRCDIR/include/Config/config.h.in?

Also, does defining HAVE_ALLOCA_H to 1 fix the compilation?

-- John T.
> 
> 
> /Henrik
> 
> _________________________________________________________________
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> 
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* John T. Criswell                         Email: criswell at uiuc.edu *
* Research Programmer                                               *
* University of Illinois at Urbana-Champaign                        *
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