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Don't require a C++ compiler #9075

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Jun 17, 2021
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Don't require a C++ compiler #9075

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7 changes: 4 additions & 3 deletions config/ompi_setup_cxx.m4
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ dnl Copyright (c) 2007-2009 Sun Microsystems, Inc. All rights reserved.
dnl Copyright (c) 2008-2020 Cisco Systems, Inc. All rights reserved.
dnl Copyright (c) 2015-2016 Research Organization for Information Science
dnl and Technology (RIST). All rights reserved.
dnl Copyright (c) 2021 Nanook Consulting. All rights reserved.
dnl $COPYRIGHT$
dnl
dnl Additional copyrights may follow
Expand All @@ -33,7 +34,6 @@ AC_DEFUN([OMPI_PROG_CXX],[

ompi_cxxflags_save="$CXXFLAGS"
AC_PROG_CXX
AC_PROG_CXXCPP
CXXFLAGS="$ompi_cxxflags_save"

# Note: according to the Autoconf docs, if no C++ compiler is
Expand All @@ -43,13 +43,14 @@ AC_DEFUN([OMPI_PROG_CXX],[
# https://www.open-mpi.org/community/lists/users/2013/02/21356.php,
# which advises us to set Libtool precious variables to "no" if we
# don't want Libtool to setup that language at all.
AS_IF([test "x$CXX" = "x"], [CXX=no])
set dummy $CXX
ompi_cxx_argv0=[$]2
OPAL_WHICH([$ompi_cxx_argv0], [OMPI_CXX_ABSOLUTE])
AS_IF([test "x$OMPI_CXX_ABSOLUTE" = "x"],
[CXX=no
OMPI_CXX_ABSOLUTE=no])
OMPI_CXX_ABSOLUTE=no],
[ # If we did actually find a C++ compiler, find the C++ CPP
AC_PROG_CXXCPP])

AC_DEFINE_UNQUOTED(OMPI_CXX, "$CXX", [OMPI underlying C++ compiler])
AC_SUBST(OMPI_CXX_ABSOLUTE)
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