autoconf tests and stdcall name mangling

[Dimitrios Apostolou]

(Not sure which list is relevant, so I'm cross-posting to both mingw-users 
and autoconf lists)

Hello lists,

when I'm cross compiling from linux x86_64 to 32-bit MinGW autoconf 
refuses to detect getaddrinfo and define HAVE_GETADDRINFO. I've limited 
the case to the following behaviour:

The "getaddrinfo-link.c" attached file is a simplification of what 
AC_REPLACE_FUNCS(getaddrinfo) tries to compile and link. It fails to find 
the symbol because gcc most probably doesn't use proper calling 
conventions (stdcall). This is demonstrated by the build success of the 
second attached program. So:

$ i686-w64-mingw32-gcc     -o getaddrinfo-link getaddrinfo-link.c    -lws2_32
/tmp/cctQtw3q.o:getaddrinfo-link.c:(.text+0xc): undefined reference to 
`_getaddrinfo'
collect2: ld returned 1 exit status
$ i686-w64-mingw32-gcc     -o getaddrinfo-link getaddrinfo-link-2.c    -lws2_32
$

In the second case ("getaddrinfo-link-2.c") compilation is successful 
because the symbol linked is "address@hidden" which actually exists in 
ws2_32 (verified it with nm). Here is the version of my toolchain:

$ i686-w64-mingw32-gcc --version
i686-w64-mingw32-gcc (GCC) 4.6.3

Any idea what's the proper way to use AC_REPLACE_FUNCS in this case?


Thanks in advance,
Dimitris

getaddrinfo-link-2.c
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getaddrinfo-link.c
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