dnl Usage:
dnl DC_TEST_SHOBJFLAGS(shobjflags, shobjldflags, action-if-not-found)
dnl
AC_DEFUN([DC_TEST_SHOBJFLAGS], [
AC_SUBST(SHOBJFLAGS)
AC_SUBST(SHOBJCPPFLAGS)
AC_SUBST(SHOBJLDFLAGS)
OLD_LDFLAGS="$LDFLAGS"
OLD_CFLAGS="$CFLAGS"
OLD_CPPFLAGS="$CPPFLAGS"
SHOBJFLAGS=""
SHOBJCPPFLAGS=""
SHOBJLDFLAGS=""
CFLAGS="$OLD_CFLAGS $1"
CPPFLAGS="$OLD_CPPFLAGS $2"
LDFLAGS="$OLD_LDFLAGS $3"
AC_TRY_LINK([#include <stdio.h>
int unrestst(void);], [ printf("okay\n"); unrestst(); return(0); ], [ SHOBJFLAGS="$1"; SHOBJCPPFLAGS="$2"; SHOBJLDFLAGS="$3" ], [
LDFLAGS="$OLD_LDFLAGS"
CFLAGS="$OLD_CFLAGS"
CPPFLAGS="$OLD_CPPFLAGS"
$4
])
LDFLAGS="$OLD_LDFLAGS"
CFLAGS="$OLD_CFLAGS"
CPPFLAGS="$OLD_CPPFLAGS"
])
AC_DEFUN([DC_GET_SHOBJFLAGS], [
AC_SUBST(SHOBJFLAGS)
AC_SUBST(SHOBJCPPFLAGS)
AC_SUBST(SHOBJLDFLAGS)
DC_CHK_OS_INFO
AC_MSG_CHECKING(how to create shared objects)
if test -z "$SHOBJFLAGS" -a -z "$SHOBJLDFLAGS" -a -z "$SHOBJCPPFLAGS"; then
DC_TEST_SHOBJFLAGS([-fPIC], [-DPIC], [-shared], [
DC_TEST_SHOBJFLAGS([-fPIC], [-DPIC], [-shared -mimpure-text], [
DC_TEST_SHOBJFLAGS([-fPIC], [-DPIC], [-shared -rdynamic -Wl,-G,-z,textoff], [
DC_TEST_SHOBJFLAGS([-fPIC], [-DPIC], [-shared -Wl,-G], [
DC_TEST_SHOBJFLAGS([-fPIC], [-DPIC], [-shared -dynamiclib -flat_namespace -undefined suppress -bind_at_load], [
DC_TEST_SHOBJFLAGS([-fPIC], [-DPIC], [-dynamiclib -flat_namespace -undefined suppress -bind_at_load], [
DC_TEST_SHOBJFLAGS([-fPIC], [-DPIC], [-Wl,-dynamiclib -Wl,-flat_namespace -Wl,-undefined,suppress -Wl,-bind_at_load], [
DC_TEST_SHOBJFLAGS([-fPIC], [-DPIC], [-dynamiclib -flat_namespace -undefined suppress], [
DC_TEST_SHOBJFLAGS([-fPIC], [-DPIC], [-dynamiclib], [
AC_MSG_RESULT(cant)
AC_MSG_ERROR([We are unable to make shared objects.])
])
])
])
])
])
])
])
])
])
fi
AC_MSG_RESULT($SHOBJCPPFLAGS $SHOBJFLAGS $SHOBJLDFLAGS)
DC_SYNC_SHLIBOBJS
])
AC_DEFUN([DC_SYNC_SHLIBOBJS], [
AC_SUBST(SHLIBOBJS)
SHLIBOBJS=""
for obj in $LIB@&t@OBJS; do
SHLIBOBJS="$SHLIBOBJS `echo $obj | sed 's/\.o$/_shr.o/g'`"
done
])
AC_DEFUN([DC_SYNC_RPATH], [
AC_ARG_ENABLE([rpath], AS_HELP_STRING([--disable-rpath], [disable setting of rpath]), [
if test "$enableval" = 'no'; then
set_rpath='no'
else
set_rpath='yes'
fi
], [
if test "$cross_compiling" = 'yes'; then
set_rpath='no'
else
ifelse($1, [], [
set_rpath='yes'
], [
set_rpath='$1'
])
fi
])
if test "$set_rpath" = 'yes'; then
OLD_LDFLAGS="$LDFLAGS"
AC_CACHE_CHECK([how to set rpath], [rsk_cv_link_set_rpath], [
AC_LANG_PUSH(C)
for tryrpath in "-Wl,-rpath" "-Wl,--rpath" "-Wl,-R"; do
LDFLAGS="$OLD_LDFLAGS $tryrpath -Wl,/tmp"
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [ return(0); ])], [
rsk_cv_link_set_rpath="$tryrpath"
break
])
done
AC_LANG_POP(C)
unset tryrpath
])
LDFLAGS="$OLD_LDFLAGS"
unset OLD_LDFLAGS
if test -n "$rsk_cv_link_set_rpath"; then
ADDLDFLAGS=""
for opt in $LDFLAGS $LIBS; do
if echo "$opt" | grep '^-L' >/dev/null; then
rpathdir="`echo "$opt" | sed 's@^-L *@@'`"
ADDLDFLAGS="$ADDLDFLAGS $rsk_cv_link_set_rpath -Wl,$rpathdir"
fi
done
unset opt
LDFLAGS="$LDFLAGS $ADDLDFLAGS"
unset ADDLDFLAGS
fi
fi
])
AC_DEFUN([DC_CHK_OS_INFO], [
AC_CANONICAL_HOST
AC_SUBST(SHOBJEXT)
AC_SUBST(SHOBJFLAGS)
AC_SUBST(SHOBJCPPFLAGS)
AC_SUBST(SHOBJLDFLAGS)
AC_SUBST(CFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(AREXT)
if test "$dc_cv_dc_chk_os_info_called" != '1'; then
dc_cv_dc_chk_os_info_called='1'
AC_MSG_CHECKING(host operating system)
AC_MSG_RESULT($host_os)
SHOBJEXT="so"
AREXT="a"
case $host_os in
darwin*)
SHOBJEXT="dylib"
;;
hpux*)
case "$host_cpu" in
ia64)
SHOBJEXT="so"
;;
*)
SHOBJEXT="sl"
;;
esac
;;
mingw32|mingw32msvc*)
SHOBJEXT="dll"
AREXT='lib'
CFLAGS="$CFLAGS -mms-bitfields"
CPPFLAGS="$CPPFLAGS -mms-bitfields"
SHOBJCPPFLAGS="-DPIC"
SHOBJLDFLAGS='-shared -Wl,--dll -Wl,--enable-auto-image-base -Wl,--output-def,$[@].def,--out-implib,$[@].a'
;;
msvc)
SHOBJEXT="dll"
AREXT='lib'
CFLAGS="$CFLAGS -nologo"
SHOBJCPPFLAGS='-DPIC'
SHOBJLDFLAGS='/LD /LINK /NODEFAULTLIB:MSVCRT'
;;
cygwin*)
SHOBJEXT="dll"
SHOBJFLAGS="-fPIC"
SHOBJCPPFLAGS="-DPIC"
CFLAGS="$CFLAGS -mms-bitfields"
CPPFLAGS="$CPPFLAGS -mms-bitfields"
SHOBJLDFLAGS='-shared -Wl,--enable-auto-image-base -Wl,--output-def,$[@].def,--out-implib,$[@].a'
;;
esac
fi
])
AC_DEFUN([SHOBJ_SET_SONAME], [
SAVE_LDFLAGS="$LDFLAGS"
AC_MSG_CHECKING([how to specify soname])
for try in "-Wl,--soname,$1" "Wl,-install_name,$1" '__fail__'; do
LDFLAGS="$SAVE_LDFLAGS"
if test "${try}" = '__fail__'; then
AC_MSG_RESULT([can't])
break
fi
LDFLAGS="${LDFLAGS} ${try}"
AC_TRY_LINK([void TestTest(void) { return; }], [], [
LDFLAGS="${SAVE_LDFLAGS}"
SHOBJLDFLAGS="${SHOBJLDFLAGS} ${try}"
AC_MSG_RESULT([$try])
break
])
done
AC_SUBST(SHOBJLDFLAGS)
])
dnl $1 = Description to show user
dnl $2 = Libraries to link to
dnl $3 = Variable to update (optional; default LIBS)
dnl $4 = Action to run if found
dnl $5 = Action to run if not found
AC_DEFUN([SHOBJ_DO_STATIC_LINK_LIB], [
ifelse($3, [], [
define([VAR_TO_UPDATE], [LIBS])
], [
define([VAR_TO_UPDATE], [$3])
])
AC_MSG_CHECKING([for how to statically link to $1])
trylink_ADD_LDFLAGS=''
for arg in $VAR_TO_UPDATE; do
case "${arg}" in
-L*)
trylink_ADD_LDFLAGS="${arg}"
;;
esac
done
SAVELIBS="$LIBS"
staticlib=""
found="0"
dnl HP/UX uses -Wl,-a,archive ... -Wl,-a,shared_archive
dnl Linux and Solaris us -Wl,-Bstatic ... -Wl,-Bdynamic
AC_LANG_PUSH([C])
for trylink in "-Wl,-a,archive $2 -Wl,-a,shared_archive" "-Wl,-Bstatic $2 -Wl,-Bdynamic" "$2"; do
if echo " ${LDFLAGS} " | grep ' -static ' >/dev/null; then
if test "${trylink}" != "$2"; then
continue
fi
fi
LIBS="${SAVELIBS} ${trylink_ADD_LDFLAGS} ${trylink}"
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
staticlib="${trylink}"
found="1"
break
])
done
AC_LANG_POP([C])
LIBS="${SAVELIBS}"
if test "${found}" = "1"; then
new_RESULT=''
SAVERESULT="$VAR_TO_UPDATE"
for lib in ${SAVERESULT}; do
addlib='1'
for removelib in $2; do
if test "${lib}" = "${removelib}"; then
addlib='0'
break
fi
done
if test "$addlib" = '1'; then
new_RESULT="${new_RESULT} ${lib}"
fi
done
VAR_TO_UPDATE="${new_RESULT} ${staticlib}"
AC_MSG_RESULT([${staticlib}])
$4
else
AC_MSG_RESULT([cant])
$5
fi
])