Re: AIDE compilation under cygwin

[John Kristoff]

On Tue, 16 Mar 2004 22:04:37 -0600
John Kristoff [EMAIL PROTECTED] wrote:

 Does someone have any detailed notes about installing a current version
 of AIDE under cygwin?  mhash appears to compile OK, but the configure
 script in AIDE fails in its mhash library check.  From the config.log:
[...]
   /[dir]/mhash-0.8.18/lib/mhash.c:664: multiple definition of `_main'

I finally got around to looking at this again and thought I would post
my solution in case any one else had a need for it.

Richard had pointed out the following in mhash.c:

  #ifdef WIN32
  WIN32DLL_DEFINE int main (void)
  {
  /* empty main function to avoid linker error (see cygwin FAQ) */
  }
  #endif

The cygwin FAQ at http://cygwin.com/faq/faq_toc.html#TOC95 mentions a
potential problem with dynamic libraries needing this hack or that the
compiler line needs to be reordered.  I didn't have much luck with the
latter, so to solve I removed the definition and main() function from
the mhash.c source file and built mhash as follows:

  ./configure --enable-static=yes --enable-shared=no
  make

Then aide as:

  ./configure --with-extra-libs=-L/path/to/mhash-0.8.18/lib/.libs \
 --with-extra-includes=-I/path/to/mhash-0.8.18/lib
  make

A working aide.exe was the result.

John

AIDE compilation under cygwin

[John Kristoff]

Does someone have any detailed notes about installing a current version
of AIDE under cygwin?  mhash appears to compile OK, but the configure
script in AIDE fails in its mhash library check.  From the config.log:

  configure:2996: gcc -E -g -O2 -I/[dir]/mhash-0.8.18/lib -static conftest.c 
/dev/null 2conftest.out
  configure:3028: checking for gzdopen in -lz
  configure:3047: gcc -o conftest -g -O2 -static -g -O2 -I/[dir]/mhash-0.8.18/lib 
-static  -L/[dir]/mhash-0.8.18/lib/.libs -static conftest.c -lz   15
  configure:3096: checking for regexec
  configure:3124: gcc -o conftest -g -O2 -static -g -O2 -I/dir]/mhash-0.8.18/lib 
-static  -L/[dir]/mhash-0.8.18/lib/.libs conftest.c -lz  15
  configure:3096: checking for regcomp
  configure:3124: gcc -o conftest -g -O2 -static -g -O2 -I/[dir]/mhash-0.8.18/lib 
-static  -L/[dir]/mhash-0.8.18/lib/.libs conftest.c -lz  15
  configure:3208: checking for mhash_get_block_size in -lmhash
  configure:3227: gcc -o conftest -g -O2 -static -g -O2 -I/[dir]/mhash-0.8.18/lib 
-static  -L/[dir]/mhash-0.8.18/lib/.libs conftest.c -lmhash  -lz  15
  /[dir]/mhash-0.8.18/lib/.libs/libmhash.a(mhash.o)(.text+0xd70): In function `main':
  /[dir]/mhash-0.8.18/lib/mhash.c:664: multiple definition of `_main'
  /cygdrive/c/WINDOWS/TEMP/cc0Ut2p0.o(.text+0x0):/[dir]/aide-0.10/configure:3222: 
first defined here
  collect2: ld returned 1 exit status
  configure: failed program was:
  #line 3216 configure
  #include confdefs.h
  /* Override any gcc2 internal prototype to avoid an error.  */
  /* We use char because int might match the return type of a gcc2
  builtin and then its argument prototype would still apply.  */
  char mhash_get_block_size();
 
  int main() {
  mhash_get_block_size()
  ; return 0; }

Thanks for any hints,

John