68 строки
2.1 KiB
Plaintext
68 строки
2.1 KiB
Plaintext
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dnl -*- shell-script -*-
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dnl
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dnl Copyright (c) 2006 Los Alamos National Security, LLC. All rights
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dnl reserved.
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dnl $COPYRIGHT$
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dnl
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dnl Additional copyrights may follow
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dnl
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dnl $HEADER$
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dnl
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# OMPI_LANG_LINK_WITH_C(language)
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# -------------------------------
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# Try to link a small test program against a C object file to make
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# sure the compiler for the given language is compatible with the C
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# compiler.
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AC_DEFUN([OMPI_LANG_LINK_WITH_C], [
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AS_VAR_PUSHDEF([lang_var], [ompi_cv_c_link_$1])
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AC_CACHE_CHECK([if C and $1 are link compatible],
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lang_var,
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[m4_if([$1], [Fortran],
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[m4_define([ompi_lang_link_with_c_fortran], 1)],
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[m4_if([$1], [Fortran 77],
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[m4_define([ompi_lang_link_with_c_fortran], 1)],
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[m4_define([ompi_lang_link_with_c_fortran], 0)])])
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m4_if(ompi_lang_link_with_c_fortran, 1,
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[OMPI_F77_MAKE_C_FUNCTION([testfunc_name], [testfunc])],
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[testfunc_name="testfunc"])
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# Write out C part
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AC_LANG_PUSH(C)
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rm -f conftest_c.$ac_ext
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cat > conftest_c.$ac_ext << EOF
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int $testfunc_name(int a);
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int $testfunc_name(int a) { return a; }
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EOF
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# Now compile both parts
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OMPI_LOG_COMMAND([$CC -c $CFLAGS $CPPFLAGS conftest_c.$ac_ext],
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[AC_LANG_PUSH($1)
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ompi_lang_link_with_c_libs="$LIBS"
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LIBS="conftest_c.o $LIBS"
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m4_if(ompi_lang_link_with_c_fortran, 1,
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([], [
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external testfunc
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call testfunc(1)
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])],
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[AS_VAR_SET(lang_var, ["yes"])], [AS_VAR_SET(lang_var, ["no"])])],
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([
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#if defined(c_plusplus) || defined(__cplusplus)
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extern "C" int testfunc(int);
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#else
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extern int testfunc(int);
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#endif
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],
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[return testfunc(0);])],
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[AS_VAR_SET(lang_var, ["yes"])], [AS_VAR_SET(lang_var, ["no"])])])
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LIBS="$ompi_lang_link_with_c_libs"
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AC_LANG_POP($1)],
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[AS_VAR_SET(lang_var, ["no"])])
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rm -f conftest_c.$ac_ext
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AC_LANG_POP(C)])
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AS_IF([test "AS_VAR_GET([lang_var])" = "yes"], [$2], [$3])
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AS_VAR_POPDEF([lang_var])dnl
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])
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