[R] R CMD SHLIB changes function name when compiling

[Steve Pederson]

I think I should also add that I have compiled R from source so am 
pretty confident that I have the correct set of Rtools.


On 8/10/2010 8:06 PM, Prof Brian Ripley wrote:
> On Fri, 8 Oct 2010, Steve Pederson wrote:
>
>> Hi,
>>
>> I'm trying to write a function in C for implementation with .Call.
>> When compiling using R CMD SHLIB characters seem to be added to the
>> function name.
>>
>> Here's the complete C code from the file summariseMCMC.c:
>>
>> #include<R.h>
>> #include<Rdefines.h>
>> #include<Rinternals.h>
>>
>> void summariseMCMC(SEXP data) {
>>
>> PROTECT(data=AS_NUMERIC(data));
>> UNPROTECT(1);
>>
>> }
>>
>> Then after compiling (R CMD SHLIB summariseMCMC.c) & loading the .dll
>>
>> dyn.load("C:/R/R-2.11.1/bin/summariseMCMC.dll")
>> is.loaded("_Z13summariseMCMCP7SEXPREC")
>> [1] TRUE
>> is.loaded("summariseMCMC")
>> [1] FALSE
>>
>> Just wondering if anyone had any pointers for getting rid of this, or
>> have I missed something outrageously obvious?
>
> You have. This was not done by'R CMD SHLIB', but by a C++ compiler -- it
> is called 'name mangling'. Unfortunately you didn't show us the output
> from that command, when the cause would probably have been 'outrageously
> obvious'.
>
> The fix is to make sure you use a C compiler to compile C code, and
> we've almost no idea why that is not being done on your system.
> But as a guess, check that the environment variable CC is not set.
>
>>
>> Thanks,
>>
>> Steve
>>
>>
>> sessionInfo()
>> R version 2.11.1 (2010-05-31)
>> i386-pc-mingw32
>>
>> locale:
>> [1] LC_COLLATE=English_Australia.1252 LC_CTYPE=English_Australia.1252
>> [3] LC_MONETARY=English_Australia.1252 LC_NUMERIC=C
>> [5] LC_TIME=English_Australia.1252
>>
>> attached base packages:
>> [1] stats graphics grDevices utils datasets methods base
>>
>> other attached packages:
>> [1] limma_3.4.4 Biobase_2.8.0 aroma.affymetrix_1.7.0
>> [4] aroma.apd_0.1.7 affxparser_1.20.0 R.huge_0.2.0
>> [7] aroma.core_1.7.0 aroma.light_1.16.0 matrixStats_0.2.1
>> [10] R.rsp_0.3.6 R.cache_0.3.0 R.filesets_0.8.3
>> [13] digest_0.4.2 R.utils_1.4.4 R.oo_1.7.3
>> [16] R.methodsS3_1.2.0
>>
>> loaded via a namespace (and not attached):
>> [1] tools_2.11.1
>>
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>>
>