I would like to perform configure tests trying to link a program (in
order to test for libraries) using libtool since that is what my
libraries and programs use anyways. So, based on AC_TRY_LINK and
AC_LINK_IFELSE, I've come up with the macro below which works for C. I
would like to extend it for the other languages (hence the use of
AC_LANG_CASE). Before I do that, I was hoping to get comments/feedback
on the current implementation. Specifically any issues I might have.
One concern I have is that AC_LANG_CASE is undocumented as far as I
can tell, and _AC_DO_STDERR seems to be (from the naming) meant for
autoconf use only. The current version seems to do what I want as far
as my limited testing has shown.
Chris
# VSIPL_LTLINK_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
# ------------------------------------------------
# Tries to link a program using a libtool script. Requires that the libtool
# script be generated (e.g. LT_OUTPUT)
AC_DEFUN([VSIPL_LTLINK_IFELSE],
[
AC_REQUIRE([LT_OUTPUT])
AC_LANG_COMPILER_REQUIRE()
AC_LANG_CASE(
[C],
[vsipl_ltcompile='./libtool --tag=CC --mode=compile $CC $CFLAGS
$CPPFLAGS $LT_CFLAGS -c -o conftest.lo conftest.$ac_ext
>&AS_MESSAGE_LOG_FD'
vsipl_ltlink='./libtool --tag=CC --mode=link $CC $CFLAGS $CPPFLAGS
$LT_CFLAGS $LDFLAGS $LT_LDFLAGS -o conftest$ac_exeext conftest.lo
$LIBS >&AS_MESSAGE_LOG_FD'],
[vsipl_ltcompile='exit 1'
vsipl_ltlink='exit 1'])
#
# Generate the program
#
AC_LANG_CONFTEST([$1])
rm -f conftest.lo conftest.$ac_objext conftest$ac_exeext
AS_IF([_AC_DO_STDERR($vsipl_ltcompile) && _AC_DO_STDERR($vsipl_ltlink) && {
test -z "$ac_[]_AC_LANG_ABBREV[]_werror_flag" ||
test ! -s conftest.err
} && test -s conftest$ac_exeext && {
test "$cross_compiling" = yes ||
AS_TEST_X([conftest$ac_exeext])
}],
[$2],
[_AC_MSG_LOG_CONFTEST
$3])
# Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
# created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
# interfere with the next link command; also delete a directory that is
# left behind by Apple's compiler. We do this before executing the actions.
rm -rf conftest.dSYM conftest_ipa8_conftest.oo
])
# VSIPL_TRY_LTLINK(INCLUDES, FUNCTION-BODY,
# [ACTION-IF-TRUE], [ACTION-IF-FALSE])
# ------------------------------------------------
# Tries to link a program using a libtool script. Requires that the libtool
# script be generated (e.g. LT_OUTPUT)
AC_DEFUN([VSIPL_TRY_LTLINK],
[VSIPL_LTLINK_IFELSE([AC_LANG_PROGRAM([[$1]], [[$2]])], [$3], [$4])])
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