[Mingw-msys] ./configure and /usr/local/lib(s)

[Jonathan B. <jdb...@un...>]

A particular configure script checks for the presence of the zlib and =
openssl libraries.
I have downloaded and built both of them, into the real directories:
C:\msys\local\lib (and \include) and C:\mingw\lib (and \include)
which correspond to /mingw/lib, /mingw/include, /usr/local/lib, and =
/usr/local/include, in MSYS.
For some reason, the configure script fails and reports that the =
libraries are not available.
What do I need to do to ensure that home-built libraries will be found =
by standard ./configure scripts?

Here is an excerpt from configure for the zlib search:
The returned error message is the one near the bottom, " *** zlib =
missing - please install first or check config.log *** "
# Check whether --with-zlib or --without-zlib was given.

if test "${with_zlib+set}" =3D set; then

withval=3D"$with_zlib"

if test "x$withval" =3D "xno" ; then

{ { echo "$as_me:$LINENO: error: *** zlib is required ***" >&5

echo "$as_me: error: *** zlib is required ***" >&2;}

{ (exit 1); exit 1; }; }

fi

if test -d "$withval/lib"; then

if test -n "${need_dash_r}"; then

LDFLAGS=3D"-L${withval}/lib -R${withval}/lib ${LDFLAGS}"

else

LDFLAGS=3D"-L${withval}/lib ${LDFLAGS}"

fi

else

if test -n "${need_dash_r}"; then

LDFLAGS=3D"-L${withval} -R${withval} ${LDFLAGS}"

else

LDFLAGS=3D"-L${withval} ${LDFLAGS}"

fi

fi

if test -d "$withval/include"; then

CPPFLAGS=3D"-I${withval}/include ${CPPFLAGS}"

else

CPPFLAGS=3D"-I${withval} ${CPPFLAGS}"

fi



fi;



echo "$as_me:$LINENO: checking for deflate in -lz" >&5

echo $ECHO_N "checking for deflate in -lz... $ECHO_C" >&6

if test "${ac_cv_lib_z_deflate+set}" =3D set; then

echo $ECHO_N "(cached) $ECHO_C" >&6

else

ac_check_lib_save_LIBS=3D$LIBS

LIBS=3D"-lz $LIBS"

cat >conftest.$ac_ext <<_ACEOF

#line $LINENO "configure"

#include "confdefs.h"

/* Override any gcc2 internal prototype to avoid an error. */

#ifdef __cplusplus

extern "C"

#endif

/* We use char because int might match the return type of a gcc2

builtin and then its argument prototype would still apply. */

char deflate ();

#ifdef F77_DUMMY_MAIN

# ifdef __cplusplus

extern "C"

# endif

int F77_DUMMY_MAIN() { return 1; }

#endif

int

main ()

{

deflate ();

;

return 0;

}

_ACEOF

rm -f conftest.$ac_objext conftest$ac_exeext

if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5

(eval $ac_link) 2>&5

ac_status=3D$?

echo "$as_me:$LINENO: \$? =3D $ac_status" >&5

(exit $ac_status); } &&

{ ac_try=3D'test -s conftest$ac_exeext'

{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5

(eval $ac_try) 2>&5

ac_status=3D$?

echo "$as_me:$LINENO: \$? =3D $ac_status" >&5

(exit $ac_status); }; }; then

ac_cv_lib_z_deflate=3Dyes

else

echo "$as_me: failed program was:" >&5

cat conftest.$ac_ext >&5

ac_cv_lib_z_deflate=3Dno

fi

rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext

LIBS=3D$ac_check_lib_save_LIBS

fi

echo "$as_me:$LINENO: result: $ac_cv_lib_z_deflate" >&5

echo "${ECHO_T}$ac_cv_lib_z_deflate" >&6

if test $ac_cv_lib_z_deflate =3D yes; then

cat >>confdefs.h <<_ACEOF

#define HAVE_LIBZ 1

_ACEOF

LIBS=3D"-lz $LIBS"

else

{ { echo "$as_me:$LINENO: error: *** zlib missing - please install first =
or check config.log ***" >&5

echo "$as_me: error: *** zlib missing - please install first or check =
config.log ***" >&2;}

{ (exit 1); exit 1; }; }

fi

Here is the relavant portion of config.log:

configure:5619: checking for deflate in -lz

configure:5652: gcc -o conftest.exe -g -O2 -Wall -Wpointer-arith =
-Wno-uninitialized -lws2_32 conftest.c -lz >&5

c:\mingw\bin\..\lib\gcc-lib\mingw32\3.2\..\..\..\..\mingw32\bin\ld.exe: =
cannot find -lz

configure:5655: $? =3D 1

configure: failed program was:

#line 5626 "configure"

#include "confdefs.h"

/* Override any gcc2 internal prototype to avoid an error. */

#ifdef __cplusplus

extern "C"

#endif

/* We use char because int might match the return type of a gcc2

builtin and then its argument prototype would still apply. */

char deflate ();

#ifdef F77_DUMMY_MAIN

# ifdef __cplusplus

extern "C"

# endif

int F77_DUMMY_MAIN() { return 1; }

#endif

int

main ()

{

deflate ();

;

return 0;

}

configure:5672: result: no

configure:5682: error: *** zlib missing - please install first or check =
config.log ***

Thanks for any information you can provide.

BTW, OpenSSL, zlib, Fastest Fourier Transform in the West, and Gnu MP =
(arbitrary precision arithmatic library) all build under MinGW/MSYS!  =
Thank you MinGW developers!