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

[Henrik Bach]

Hi John,

In my setup OBJDIR is SRCDIR. I'm looking at the config.h and not 
config.h.in.

Yes, defining HAVE_ALLOCA_H to 1 fixed the compilation. Moreover, I also 
defined HAVE_ALLOCA to 1 in the config.h:
--------------------
/* Define to 1 if you have `alloca', as a function or macro. */
/* #undef HAVE_ALLOCA */
#define HAVE_ALLOCA 1 /*Henrik:*/

/* Define to 1 if you have <alloca.h> and it should be used (not on Ultrix).
   */
/* #undef HAVE_ALLOCA_H */
#define HAVE_ALLOCA_H 1 /*Henrik:*/
--------------------


/Henrik


>From: John Criswell <criswell at cs.uiuc.edu>
>Date: Tue, 20 Jul 2004 16:42:01 -0500
>
>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                        *
>*                                                                   *
>* "It's today!" said Piglet. "My favorite day," said Pooh.          *
>*********************************************************************
>
>
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